WO2008034165A1 - Système pour le montage et le maintien de fermes de toit - Google Patents

Système pour le montage et le maintien de fermes de toit Download PDF

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Publication number
WO2008034165A1
WO2008034165A1 PCT/AU2007/001233 AU2007001233W WO2008034165A1 WO 2008034165 A1 WO2008034165 A1 WO 2008034165A1 AU 2007001233 W AU2007001233 W AU 2007001233W WO 2008034165 A1 WO2008034165 A1 WO 2008034165A1
Authority
WO
WIPO (PCT)
Prior art keywords
truss
attachment
jaw
elongate member
trusses
Prior art date
Application number
PCT/AU2007/001233
Other languages
English (en)
Inventor
Mark Andrew Stevens
Original Assignee
Innovative Construction Techniques Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2006220397A external-priority patent/AU2006220397B8/en
Priority claimed from AU2006220401A external-priority patent/AU2006220401A1/en
Priority claimed from AU2007200211A external-priority patent/AU2007200211B1/en
Priority claimed from AU2007900560A external-priority patent/AU2007900560A0/en
Application filed by Innovative Construction Techniques Pty Ltd filed Critical Innovative Construction Techniques Pty Ltd
Publication of WO2008034165A1 publication Critical patent/WO2008034165A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E04G21/18—Adjusting tools; Templates
    • E04G21/1891—Cut-marking templates for rafters; Templates used for assembling building frameworks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks
    • B66C1/36—Crane hooks with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D15/00—Apparatus or tools for roof working
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E04G21/18—Adjusting tools; Templates
    • E04G21/1841—Means for positioning building parts or elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/32—Safety or protective measures for persons during the construction of buildings
    • E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
    • E04G21/3214—Means for working on roofs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C2003/026—Braces

Definitions

  • the present invention is directed to a system for facilitating the lifting and positioning of roof trusses in a simpler and safer manner, and in most cases enabling a worker to do so while standing at ground lever rather than on top of the roof which is much more precarious to the worker.
  • Various devices and apparatus are described which can form part of the total system or be used independently. These devices may include: A batten which can hold adjacent trusses together and which remains on the trusses permanently,
  • a spring loaded removable spacer which can hold adjacent trusses in position temporarily and then removed for reuse
  • a ramp like location device to assist in positioning trusses in place quickly and easily A twist on truss controller which can enable a person at ground level to move the trusses into position thereby improving safety to the person, and
  • a quick release lifting hook to enable trusses to be lifted by a crane and then released from the hook by a person at ground lever, thereby improving safety to the person.
  • the roof trusses are typically manufactured off-site in a factory and transported to a building site. A crane or something similar then lifts the roof trusses into position.
  • the building contains vertical support walls, and the trusses are placed on top of the support walls.
  • the support walls are typically either made of timber or blocks. If the support walls are made of timber, the walls typically comprise a vertical framework of timber studs. If the support walls are made of blocks, the uppermost course of blocks is known as the bond beam.
  • the trusses are delivered to site and it is necessary to lift and erect each truss to the vertical position. It is very important that the trusses are placed in exactly in the correct position. Thus, the trusses need to be spaced apart by a precise distance and also need to be positioned on top of the support walls in exactly the right place.
  • cleats anchors
  • cleats typically comprise metal plates or something similar which are either anchored in the concrete of the top wall (if blocks are used) or nailed or otherwise fastened to the beam on the top wall.
  • the system can include an apparatus that can function to assist in the correct spacing of trusses relative to each other and which is permanently fixed to the trusses to also braces the trusses to each other.
  • an apparatus that can function to assist in the correct spacing of trusses relative to each other and which is permanently fixed to the trusses to also braces the trusses to each other.
  • Several such apparatus can be attached to a truss and remain permanently fixed to the trusses. It is envisaged that the apparatus can be made relatively inexpensively.
  • This part of the system, or the individual device can be called a "permanent batten" as, once in place, it is not removed and reused and instead, forms part of the roof assembly.
  • one aspect of the present invention may comprise a system and various devices that may enable trusses to be positioned accurately in place with a reduced requirement for workers to be positioned high above the ground.
  • Another aspect of the system may comprise one or more devices that may make erection and positioning of trusses simpler.
  • the invention comprises a system to enable roof trusses to be positioned and attached at least temporarily to each other, the system comprising lifting least one truss from the ground level to the roof level using a crane or other lifting device containing a quick release lifting hook, manipulating the truss while still being lifted by the crane using a twist on truss controller, providing at least one location device on a top wall on which the truss will be positioned, and attaching adjacent trusses together using a spacer.
  • the system is designed to enable trusses to be erected and positioned on top of a wall in a safer and easier manner and particularly while allowing the workers to stay at ground level while using various parts of the system to enable the trusses to be manoeuvred and positioned in place while staying at ground level.
  • the quick release lifting hook may comprise a rigid body adapted to support the material to be lifted (e.g. at least one truss), a elongate flexible member having a portion fixed to, or relative to, the rigid body and adapted to pass about part of the material to be lifted to prevent the material from being lifted out of the hook assembly, and a release means which is movable between a locking position where the elongate flexible member is locked about part of the material, and a release position where the elongate flexible member can be released from the material, the release means being operable remotely from the hook assembly.
  • a rigid body adapted to support the material to be lifted (e.g. at least one truss)
  • a elongate flexible member having a portion fixed to, or relative to, the rigid body and adapted to pass about part of the material to be lifted to prevent the material from being lifted out of the hook assembly
  • a release means which is movable between a locking position where the elongate flexible member is locked about part of the material, and
  • the twist on truss controller may also be known as a "truss grab or truss grabber" and may comprise a head portion adapted to engage with a truss, the grabber being attachable to a pole which is long enough to enable a person to stand on the ground and manoeuvre the truss.
  • the head portion may be rod like in configuration or may comprise sheet-like or plate like members.
  • the location device may assist in correct positioning of a roof truss, the location device and may comprise a body portion which is adapted to be positioned on a top wall on which the truss will be positioned, means to retain the body portion in place on the top wall, and guide means which can support a truss and guide the truss to the correct position.
  • the spacer may comprise a removable spacer that can temporarily attach adjacent trusses to each other or a permanent spacer which stays in position (and which therefore is also known as a "permanent batten").
  • the removable spacer may comprise a spring loaded removable spacer to enable a pair of trusses to be held relative to each other, the apparatus comprising an elongate member adapted to extend at least between a pair of adjacent trusses in use, a connector on the elongate member to enable the apparatus to be attached to a first truss prior to the first truss being lifted into position, and a grabbing jaw on the elongate member and spaced from the connector, the grabbing jaw having a first jaw member and a second jaw member and being operable between a clamping position to clamp against a second truss, and a release position.
  • the "permanent" spacer may comprise an elongate member having first attachment means to enable the elongate member to be attached to a truss in a permanent manner, and second attachment means spaced from the first attachment means by a distance approximating the spacing between adjacent trusses, the second attachment means adapted to attach to an adjacent truss upon placement of the adjacent truss against the second attachment means.
  • the invention comprises a quick release lifting hook a non-limiting example of which is described below.
  • the invention resides in a spring loaded removable spacer a non- limiting example of which is described below.
  • the invention resides in a twist on truss controller, a non-limiting example of which is described below.
  • the invention resides in a location device, a non-limiting example of which is described below.
  • the invention resides in a permanent batten, a non-limiting example of which is described below.
  • the invention resides in an apparatus that can assist in spacing and bracing adjacent trusses and which need not require a person to stand on top of the walls to do so.
  • the invention resides in an apparatus that can assist in spacing and bracing adjacent trusses, the apparatus comprising an elongate member having first attachment means ( or first attachment) to enable the elongate member to be attached to a truss in a permanent manner, and second attachment means ( or second attachment) spaced from the first attachment means by a distance approximating the spacing between adjacent trusses, the second attachment/ means adapted to attach to an adjacent truss upon placement of the adjacent truss against the second attachment /means.
  • first attachment means or first attachment
  • second attachment means or second attachment
  • the apparatus can be fixed to a first truss while the truss is on the ground and the first truss can then be lifted into position by a crane.
  • a second truss can then be lifted and can be manipulated such that a portion of the second truss engages against the second attachment means on the apparatus which results in the second truss being braced by the apparatus relative to the first truss and also being spaced at the right distance from the first truss.
  • the apparatus can be fastened to the truss at ground level and once this truss is in position, the next truss can be lifted by a crane and maneuvered into position and braced by the second attachment means on the apparatus.
  • the apparatus comprises an elongate member.
  • the elongate member will typically have a length sufficient to enable adjacent trusses to be braced relative to each other at the right spacing. As a typical spacing between adjacent trusses will be between 50 cm-200 cm, it is envisaged that the apparatus will be a least this length.
  • the apparatus can be quite long and may contain the first attachment means to enable it to be attached to the first truss and a second, third or even more further attachment means to allow a second, third or even more trusses to be spaced and braced relative to the apparatus.
  • the apparatus will function to space and brace two trusses relative to each other.
  • each truss may have more than one apparatus attached to it. Therefore, adjacent trusses may be attached relative to each other by two, three or even more of these apparatus.
  • the elongate member may be made of any suitable material and it is envisaged that suitable material may comprise metal (for instance steel), fibreglass, certain types of plastics, composite materials, laminate materials, wood, wood composites, wood laminates and the like. A typical material may comprise mild steel plate.
  • the elongate member may be treated to reduce corrosion and this may be done by any suitable means including galvanising, painting, anodising etc.
  • the elongate member may have any suitable shape to enable it to space and brace adjacent trusses relative to each other. It is envisaged that the elongate member will be substantially linear (straight).
  • the elongate member may comprise a plate like member, a strip like member, a solid member (e.g. a rod), a hollow member (e.g. a tube), or an angled member such as a substantially U-shaped member, a L-shaped member and the like.
  • the elongate member may comprise a combination of any of the above shapes and configurations or may have a different shape and configuration. As an example, the elongate member may be substantially U-shaped or channel shape in cross-section.
  • the spacing between adjacent sidewalls maybe between 10- 100 mm, and the height of each sidewall may be between 10-150 mm. If the elongate member is tubular and substantially circular in cross-section, the diameter may be between 10-150 mm. If the elongate member is tubular and has a box section configuration, the cross-section distance may be something similar.
  • the elongate member may contain strengthening or stiffening struts, plates, attachments, cross members and the like if required or desirable.
  • the elongate member can be adjustable in length. This may be beneficial in the initial storage and transportation of the apparatus. Another advantage is that the spacing between the first attachment means on the apparatus and the second attachment means on the apparatus can be adjusted to accommodate different spacing between trusses.
  • the elongate member may be adjustable telescopically and may comprise a first part which can be seen as the "outer” part and a second part which can be seen as the “inner” part and the two parts can be length adjustable relative to each other.
  • each part may have a length of between 0.4-1.5 m.
  • Each part may be tubular, channel shaped or have a configuration previously described.
  • the elongate member may comprise separate smaller parts which may be bolted, clamped or otherwise attached relative to each other at separate places to enable the overall length of the elongate member to be varied.
  • the elongate member may comprise two shorter elongate plate members which may be bolted or otherwise attached at various positions relative to each other to vary the length of the elongate member.
  • the spacing between the first attachment means and the second attachment means may be varied by having one attachment means able to move relative to the other attachment means.
  • the second attachment means may be able to slide along the elongate member and be locked in a desirable place.
  • the second attachment means may comprise a separate member that can be attached to the elongate member at a desired place by any suitable means.
  • the first attachment means will typically be of the type that enables the apparatus to be attached permanently to one truss.
  • the first attachment means may comprise some form of plate or mounting which may contain openings into which fasteners such as screws or bolts can pass to attach the first attachment means to the truss in a secure manner.
  • the invention should extend to any type of attachment means that enables the apparatus to be mounted to a truss in a permanent manner by which is meant that the apparatus will remain on the truss and will not be removed after use.
  • some form of gang nailing may be used. That is, the first attachment means may comprise a plate formed with teeth or barbs which can be hammered into the truss chord.
  • the second attachment means is spaced from the first attachment means and preferably in such a manner that when the adjacent truss is attached to the second attachment means, there is correct spacing between the first truss and the adjacent truss.
  • the spacing will therefore depend on the regulatory requirements of the particular building code but will typically be between 0 .5 -2 m.
  • the second attachment means is preferably designed such that it can attach the adjacent truss by manipulating the truss to pass against the second attachment means.
  • the second attachment means may comprise a recess or cutout or something similar in the elongate member or on some portion which is attached to the elongate member and which is designed to extend about a truss chord.
  • the recess or cutout will be substantially U-shaped in cross-section to approximate the cross-section shape of the truss chord.
  • the elongate member may be biased such that when the truss chord is at the second attachment means, the second attachment means will be pushed (by the bias) over the truss chord to attach the truss chord to the second attachment means.
  • the biasing means may comprise a spring, elastic member, resilient member and the like.
  • the second attachment means may be provided with teeth or something similar to cut into or press against or engage with the truss chord as the chord is pushed or manipulated into the second attachment means.
  • the second attachment means may comprise a recess in the elongate member containing with a plurality of teeth, barbs or prongs etc, and when the truss is manipulated to be in close proximity to the second attachment means, the second attachment means can be pushed downwardly or pulled downwardly to force the truss chord into the recess and to force the teeth etc into engagement with the truss.
  • the truss can be manipulated by a crane to be manoeuvred into close proximity to the second attachment means, and a line member can be attached to the second attachment means to pull down hard when the truss chord is aligned with the second attachment means to force the teeth to bite into the truss chord. This can all be done from the ground.
  • a spring or other biasing means may be provided to provide the force.
  • the second attachment means can be varied in size to accommodate the different thickness or shape of trusses.
  • the second attachment means may comprise a cutout of a particular size with removable or frangible or "breakout" portions adjacent the cutout which can be removed to make the cutout larger.
  • any other type of size adjustment of the second attachment means may be provided.
  • the second attachment means may comprise a relatively large recess or cutout and there may be provided one or more "fill-in" or spacing members to make the recess smaller and which can be removed to make the recess larger.
  • the invention resides in a spacer apparatus to enable a pair of trusses to be held relative to each other, the spacer comprising an elongate member adapted to extend at least between a pair of adjacent trusses in use, a connector on the elongate member to enable the apparatus to be attached to a first truss prior to the first truss being lifted into position, and a grabbing jaw on the elongate member and spaced from the connector, the grabbing jaw having a first jaw member and a second jaw member and being operable between a clamping position to clamp against a second truss, and a release position.
  • the spacer apparatus may conveniently be called a truss spacer.
  • the grabbing jaw is able to move from the release position to the clamping position upon placement of a portion of the second truss against one of the jaw members and placing a force against the one jaw member.
  • some other form of triggering action maybe provided.
  • the truss spacer can be attached to a particular truss (conveniently called the first truss) while the truss is still on the ground and by clamping the connector to the truss.
  • the truss can then be lifted into position and this will result in the elongate member being "cantilevered" substantially horizontally from one side of the first truss, with the grabbing jaw typically being on the end of the elongate member and in the release position.
  • a second truss can then be lifted and manipulated such that it presses against one of the jaw members and this causes the jaw members to snap shut to the clamping position to clamp the second truss in position.
  • another truss spacer Prior to lifting of the second truss, another truss spacer is attached to the second truss such that when the second truss is clamped in position, it will have its own cantilevered truss spacer and a third truss can then be lifted in position and clamped etc etc.
  • a single truss spacer will be used to hold a pair of trusses relative to each other.
  • two or more truss spacers may be used.
  • the truss spacer can be attached to any suitable part of the truss.
  • first truss need not be the very first truss which is positioned on top of the walls, and the term is used to distinguish between one truss and another truss. It is envisaged that the very first truss will be positioned via a known system and is already in a stable position. This truss may not have the spacer. For instance, the next truss may contain two truss spacers, one to lock onto the very first truss, and the other extending in the opposite direction to lock to the next lifted truss. Other alternatives are also envisaged.
  • the spacer comprises an elongate member which is adapted to extend at least between a pair of adjacent trusses in use. Therefore, the elongate member will typically have a length of between 0.5-3 m, although this length can vary depending on the spacing between adjacent trusses.
  • the elongate member may be adjustable in length to make the truss spacer more versatile in use.
  • the elongate member may be telescopically adjustable in length and therefore may comprise a pair of members which can slide (e.g. telescopically) relative to each other to adjust the length of the elongate member.
  • the elongate member may contain a number of segments that may be attached together to adjust the length of the elongate member.
  • the elongate member is not adjustable in length but the connector and/or the grabbing jaw may be adjustably mounted relative to the elongate member thereby enabling the spacing between the connector and the grabbing jaw to be varied.
  • both elongate member may be adjustable in length and the connector and/or grabbing jaw may be adjustably mounted to provide versatility to the truss spacer.
  • the elongate member is not length adjustable, the grabbing jaw is at one end of the elongate member and the connector is adjustably mounted to the other end of the elongate member.
  • the elongate member may be made of any suitable material and it is considered that steel or other metal and possibly some form of plastics may be suitable materials. Fibreglass may also be suitable material. Certain laminates structures may also be suitable materials.
  • the elongate member may be solid or hollow or a combination of solid portions and hollow portions. Therefore, the elongate member may be tubular (which includes a rectangular cross-section as well as a circular cross-section) or have a solid rod like configuration.
  • the elongate member may have any suitable cross-section shape and while it is preferred and envisaged that the elongate member will be rectangular or circular, it is considered that the elongate member may also be oval or have other polygonal or irregular shapes.
  • the elongate member may comprise a strip like material or a plate like material as opposed to a tubular material.
  • the elongate member may be formed from a strip material, or "angled" material such as an L-shaped angle and the like.
  • the elongate member may be made from "channel” like material such as a U-shaped channel or a C-shaped channel and the like.
  • the truss spacer contains a connector on the elongate member.
  • the connector is preferably connected directly to the elongate member but may also be connected indirectly to the elongate member possibly via some form of intermediate member. In most cases, it is considered suitable for the connector to be directly connected to the elongate member.
  • a function of the connector is to be attached to a truss. Therefore, the connector should have a configuration which enables it to do so. It is envisaged that there will be many ways by which a connector can be attached to a truss.
  • the connector may comprise a channel shaped body or have a first side wall and a second side wall which are spaced apart by a distance sufficient to enable a truss to be positioned in the channel or between the first side wall and the second side wall.
  • the channel or the spacing between the sidewalls may be adjustable and therefore one side wall or both sidewalls may be adjustable relative to each other.
  • the connector can clamp to the truss such that it cannot be easily and inadvertently knocked off.
  • the connector comprises a first part which is adapted to be clamped to the elongate member and particularly in a releasable and adjustable manner such that the connector can be adjustably positioned on the elongate member, and a second part which is adapted to attach to a truss.
  • the first part may have a configuration which enables it to slide over or otherwise engage with the elongate member to enable the position of the connector to be adjusted. If the elongate member has a rectangular cross-section, the first part may also have a rectangular cross-section of slightly larger size to enable it to slide over the elongate member. Of course, it is envisaged that there will be other means by which the connector can be adjustably mounted to the elongate member.
  • an adjustable locking means is envisaged to lock the connector to the elongate member at a desirable place.
  • the adjustable locking means may comprise fasteners that can be loosened or tightened to lock the connector against the elongate member.
  • the fasteners may comprise threaded fasteners, or some form of "cam” type fastener, or some form of "clamping” type fastener and the like.
  • some form of "pin in slot” arrangement can be provided where the elongate member is provided with an array of slots and the connector contains, or is associated with some form of locking pin(s).
  • the truss spacer further contains a grabbing jaw which may be attached directly or indirectly to the elongate member. It is preferred that the grabbing jaw is "fixed" to the elongate member and that any adjustment in the spacing between the grabbing jaw and the connector is carried out by adjusting the position of the connector on the elongate member.
  • a function of the grabbing jaw is to lock against a truss when the truss is pushed against a part of the grabbing jaw. Therefore, a function of the grabbing jaw is to provide some form of automatic clamping of the truss. This will be explained in greater detail in the preferred embodiment.
  • An advantage of this automatic clamping arrangement is that a person does not need to stand on top of the trusses but instead can stand on the ground and push or lift the truss against the grabbing jaw to cause the grabbing jaw to automatically clamp against the truss. It is also envisaged that the crane operator can manoeuvre the truss against the grabbing jaw.
  • the truss spacer will have a mechanical type trigger to trigger the grabbing jaw to clamp against the truss.
  • a more sophisticated system may comprise some form of electronic clamping, but this may require a solenoid or other type of component to trigger the grabbing jaw into the clamping position.
  • the grabbing jaw will typically comprise a first jaw member and a second jaw member between which a truss (which can conveniently be called the "second" truss) can be clamped. It is envisaged that one jaw member is movable and the other one is relatively fixed or that both jaw members can move to trigger the clamping action.
  • the grabbing jaw may comprise a first jaw member against which the truss can be positioned, and a second jaw member which can move between a release position and a clamping position.
  • the first jaw member may form part of an arrangement or assembly to trigger a second jaw member.
  • the second jaw member may comprise some form of over centre mechanism connected by a rod or something similar to a triggering mechanism which, when triggered, will cause the second jaw member to move to the clamping position.
  • the triggering mechanism may comprise a ratchet mechanism with the first jaw member activating the ratchet mechanism when the truss is pressed against the first jaw member.
  • a grabbing jaw which is somewhat similar to that described above except that the first jaw member contains a "trigger" which is activated when a truss is pushed against the first jaw member and which activates the second jaw member to move to the clamping position.
  • each jaw member comprises some form of elongate member or projection such that a truss can be clamped between the jaw members.
  • the invention resides in a truss controlling device which can enable a worker to position the truss in place while remaining on the ground.
  • the truss controlling device typically comprises a head portion.
  • the head portion may be attached to a long pole or something similar either removably or permanently thereby allowing a worker to control the truss from the ground.
  • the head portion comprises means to engage with the truss to enable the truss to be moved.
  • the means is typically such that the truss controlling device can be attached and released from the truss in a relatively simple manner.
  • a useful function of the truss controlling device is to manipulate the truss such that it engages against the grabbing jaw.
  • the truss controlling device can twist onto the truss and therefore can be called a " twist on truss controller". It is also known to call the controlling device a " truss grab” or “truss grabber” .
  • the invention resides in a location device to assist in correct positioning of a roof truss, the location device comprising a body portion which is adapted to be positioned on a top wall on which the truss will be positioned, means to retain the body portion in place on the top wall, and guide means which can support a trass and guide the truss to the correct position.
  • the invention comprises a location device to assist in correct positioning of a roof truss, the location device comprising a body portion which is adapted to be positioned on a top wall on which the truss will be positioned, a retainer to retain the body portion in place on the top wall, and a ramped guide which can support a truss and guide the trass to the correct position.
  • the top wall will contain some form of trass anchoring member such as a cleat or something else, and the location device can assist in guiding the trass towards and against the cleat.
  • the location device is preferably reusable and it is envisaged that a pair of location devices will be required for each trass with a location device being positioned on each top wall across which the trass will span.
  • the location device may be made of any suitable material and it is envisaged that metal such as steel will be suitable material as this will make the location device robust and able to be reused many times. However, there may be circumstances where other materials may also be suitable such as plastics, fibreglass, laminates structures and the like.
  • the body portion of the location device may have a configuration to enable it to be positioned on the top wall. It is envisaged that the body portion will contain at least one, and preferably a pair of opposed sidewalls which able to extend down each side of the top wall to position the body portion on the top wall.
  • the sidewalls may be continuous or discontinuous.
  • the body portion will contain a pair of projections such as prongs or finger members extending down each side of the top wall to locate the body portion in place in which case a continuous side wall need not be required.
  • the "width" of the body portion should be sufficient to enable it to be positioned on the top wall.
  • the body portion may have a fixed width or may have some form of adjustability to enable the width to be adjusted to different widths of the top wall.
  • the top wall will have a standard type width (for instance the width of block or a beam), and in these cases, a fixed width body portion may be suitable.
  • the width of the body portion will be between 100-300 mm and typically between 100-200 mm.
  • the body portion is provided with side walls, these may depend from the top wall by any suitable distance to locate the location device on the top wall. It is envisaged that the height of the sidewalls will be between 10-100 mm although it is not considered that any particular limitation should be placed on these sizes.
  • the body portion may comprise a top wall or an interconnecting portion which interconnects the side wall.
  • a top wall For the sake of convenience, this will be called a "top wall”.
  • the top wall need not be continuous and therefore it is envisaged that the top wall will contain at least one and preferably more than one interconnecting member to interconnect the sidewalls thereby giving the body portion a generally U shape configuration when viewed in side elevation. This is also generally consistent with the shape of the top block or the beam on which the truss will be located.
  • the "width" of the body portion may be larger than the "width" of the top block or the beam and that some form of adjustment means is provided to temporarily clamp or lock the location device in place.
  • the adjustment means may comprise a threaded rod, a locking cam, or something similar to lock the body portion temporarily in place.
  • the adjustment means may also comprise part or all of the means to retain the body portion in place on the top wall.
  • the anchor means typically a cleat
  • the top wall can be used to retain the location device in place and therefore separate clamps or fasteners need not be required.
  • the anchor means will project from the top wall to provide a side face or something similar against which the truss can be located and fastened. Therefore, the invention also envisages the location device having a configuration that can abut against the cleat or other anchor means, to hold the location device in place during positioning of the truss. An advantage of this arrangement is that it may be more convenient to remove the location device after use.
  • the location device contains a guide means which can support and guide a truss to the correct position.
  • the correct position will typically be against the cleat or other projecting anchor means.
  • the guide means may comprise an inclined wall having a lower end adjacent the anchor means. Thus, when a truss is placed on the guide means, it will naturally slide down the inclined wall to end up adjacent the anchor means which is the desired location.
  • the guide means may have a length of between 10-100 cm and will typically have a length of between 10-50 cm. This means that a truss can be lifted (typically by a crane) and lowered such that it strikes any part of the inclined guide means and the weight of the truss is usually sufficient to slide the truss down the guide means and against the cleat.
  • the angle of the inclined guide means may vary to suit but it is envisaged that the angle would be between 20-60° and typically about 45°.
  • the guide means may extend above the remainder of the location device and thus generally above the top wall when the location device is positioned in place.
  • a single guide means will be sufficient, but there may be circumstances where a pair of guide means may be more suitable, or even more than a pair of guide means. It is also envisaged that the angle of the guide means may be adjustable. Thus the guide means may be hingedly mounted adjacent one end (typically the lower end) and some form of adjustment may be provided.
  • a locking bar For easy removal of the location device after use, it is envisaged that a locking bar will be provided.
  • the locking bar may be movable between a free position where the location device can be removed and a locking position where the location device is held in place.
  • the guide means may comprise an inclined wall which may be substantially at right angles to the other guide means. This wall be form part of the other location device, or may be a separate item which is positioned in place on the top wall to assist with the centre alignment of the trusses.
  • the invention resides in a quick release lifting hook assembly comprising a first hook portion adapted to extend about part of the material to be lifted and to support the material, and a locking member which is movable between a locking position where the material is unable to be lifted out of engagement with the hook assembly and a free position where the material is able to be lifted out of engagement with the hook assembly, a release means to operate the locking member from the locking position to the free position, and a connecting member to enable the release means to be operated from a position spaced from the hook assembly.
  • the hook assembly When the locking member is in the free position, the hook assembly can be slightly lowered to lift the material out of engagement with the hook assembly.
  • the locking member comprises an elongate flexible member and therefore in another form the invention resides in a hook assembly for lifting materials such as a roof truss or something else, the hook assembly comprising a rigid body adapted to support the material to be lifted, a elongate flexible member having a portion fixed to, or relative to, the rigid body and adapted to pass about part of the material to be lifted to prevent the material from being lifted out of the hook assembly, and a release means which is movable between a locking position where the elongate flexible member is locked about part of the material, and a release position where the elongate flexible member can be released from the material, the release means being operable remotely from the hook assembly.
  • a truss (or something else) can initially be on the ground and a person can easily attach the hook assembly about the truss and typically by initially releasing the elongate flexible member, attaching the rigid body about the truss and then extending the elongate flexible member over the top of the truss and locking the elongate flexible member in place.
  • the crane can then lift the truss to the desired position on top of the wall.
  • the release means can be operated to release the elongate flexible member which now allows the hook be disengaged without anybody needing to stand on top of the roof to do so.
  • the release means can be operated from the ground typically by providing a line member or something similar which is attached to the release means.
  • the line member can then be pulled or yanked to move the release means to the free position to allow the elongate flexible member to be released thereby allowing the hook to be removed from the truss.
  • the release means may be operated by solenoid or something similar which can be actuated by a remote signal.
  • the hook assembly can be used to lift various different types of materials which generally require to be lifted to an elevated position. It is envisaged that the hook assembly will find particular use with erection of roof trusses but it is also envisaged that the hook assembly will find use in other areas such as lifting steel or other similar items which require the safety of working from the ground.
  • the material to be lifted will be supported by a pair (or even more) hook assemblies which will typically be spaced apart to balance the load.
  • figure 3 illustrates a pair of hook assemblies lifting a roof truss.
  • the hook assembly comprises a rigid body adapted to support the material to be lifted.
  • the rigid body may be made from any suitable material but, it is envisaged, that the most suitable material will be steel or some other strong metal.
  • the rigid body may have a configuration to support the material to be lifted. It is therefore envisaged that the rigid body will have some form of "hook" type configuration.
  • the rigid body may be somewhat L shaped and may comprise a first generally upright (in use) leg portion and a second generally horizontal (in use) leg portion.
  • the second leg portion may have some form of abutment or projection to hold the material in place.
  • the second leg portion may have some form of recess or channel into which the material can be placed.
  • the second leg portion may also be curved or otherwise configured to assist in retention of the material on the rigid body.
  • the size of the rigid body may vary depending on the loading capacity of the hook assembly and also on the material from which the rigid body is made. If the rigid body is manufactured from steel plate, it is envisaged that the first leg portion may have a length of between 10-50 cm and the second leg portion may have a length of between 5-40 cm. It is not envisaged that the invention should be limited to a rigid body having only these dimensions, unless the context requires otherwise.
  • the first leg portion and the second leg portion may be somewhat rectangular when viewed in side elevation and may have at least one rounded free end or may have another type of configuration.
  • the width of the first leg portion and the second leg portion may vary depending on the lifting load of the hook assembly and the material from which the hook assembly is made. If the hook assembly is made from steel plate, it is envisaged that the width of each leg portion will be between 1-8 cm.
  • the rigid body may comprise a pair of members which are spaced apart and interconnected relative to each other. If desired, the release means may be positioned between these pair of spaced apart members although there may also be a variation where the release means is positioned elsewhere such as on the exterior of one or both of the members.
  • the spacing between the members may vary but it is envisaged that a suitable spacing will be between 10-100 mm.
  • the hook assembly has an elongate flexible member which, in use, prevents the hook from becoming inadvertently released, and which can be remotely operated.
  • the elongate flexible member may comprise a chain or other suitably strong member which is flexible and substantially inextensible.
  • the elongate flexible member may comprise a steel rope or wire or some other type of flexible member that is strong enough and which can be releasably operated.
  • a suitable elongate flexible member will comprise a chain. Circumstances may arise where more than one elongate flexible member is used. If so, this may comprise, for instance, a pair of chains, or a chain and something else and the like.
  • the length of the elongate flexible member should be sufficient to allow it to extend about the material which is supported by the rigid body and held in place.
  • the elongate flexible member will have a length of between 20-100 cm although this may vary to suit. It is also envisaged that the elongate flexible member will have one end, or one part which is permanently attached to the remainder of the hook assembly, to avoid the elongate flexible member becoming lost.
  • a release means is provided which can function to enable the elongate flexible member to be locked and released.
  • Various types of release means are envisaged. , It is preferred that the release means is operated manually.
  • the release means may be biased to a naturally locking position where the elongate flexible member (e.g. chain) can be locked, and the release means may be manipulated to a release position where the flexible member can be released.
  • the biasing means may comprise at least one spring or other suitable member. Suitably, a pair of springs is provided.
  • the release means may comprise an elongate member which can slide or otherwise move between the locking position and the release position. It is preferred that the release means can reciprocate between the locking position and the release position although there may be circumstances where the release means can rotate or otherwise move between these positions.
  • the release means may comprise an elongate plate which may be positioned between the pair of spaced apart members. Any form of guide or slide arrangement may be provided to enable the elongate plate to slide or otherwise move between the locking and the release positions.
  • each spaced apart member may be provided with a groove or similar recess to accommodate a longitudinal edge of the elongate plate to enable the elongate plate to slide between a locking and released position.
  • the elongate plate, or another part of the release means may be provided with a profile, a configuration, an attachment, or some other means to lock the elongate flexible member when the release means is in the locking position.
  • the elongate flexible member comprises a linked chain
  • the elongate plate may be provided with some form of slot or recess to engage the chain and to hold the chain against release. Movement of the release means to the release position may cause the chain to disengage from the slot or recess thereby enabling the chain to become freed.
  • the elongate flexible member comprises something else
  • the elongate plate, or another part of the release means may be provided with a different means to releasably lock the elongate flexible member in place.
  • the release means may comprise some form of releasable clamping arrangement or something similar.
  • this part may be separate from the release means and may comprise a flap which may be able to move between an "open” position where the chain or other elongate flexible member can be more easily attached and released from the release means, and a "closed” position where the chain (or other elongate flexible member) is held in the locked position.
  • the release means can be operated at some distance from the hook assembly which means that the release means can be operated from a person standing on the ground while the hook assembly is holding a truss on top of a wall.
  • some form of connecting member will be provided between the hook assembly and the person standing on the ground or being positioned some distance away from the hook assembly, hi a simple form, the connecting member will comprise a rope, or any other type of flexible line member (e.g. a chain).
  • the connecting member may also comprise a relatively rigid rod or something similar that can be operated by the person.
  • the most convenient type of connecting member will comprise a rope.
  • the rope may have any suitable length which will depend on where the hook assembly is relative to the person and it is envisaged that the rope should have a length of between 2-6 m.
  • Figure 1 Illustrates an apparatus for spacing and bracing adjacent trusses.
  • Figure 2 Illustrates one part of the apparatus which contains the first attachment means.
  • Figure 3 Illustrates in close up the first attachment means.
  • Figure 4. Illustrates another part of the apparatus which contains the second attachment means.
  • Figure 5. Illustrates in close up the second attachment means and also illustrating
  • Figure 6 Illustrates the apparatus in the telescopically extended position.
  • Figures 7-9 Illustrate various views of the apparatus attached to a truss chord.
  • Figure 10 Illustrates a rear portion of an apparatus for spacing and bracing adjacent trusses.
  • Figure 11 Illustrates a front portion of the apparatus of figure 10.
  • Figure 12. Illustrates the front portion from the other side about to contact a truss chord.
  • Figure 13 Illustrates an upper view of the front portion of the apparatus attached to a truss.
  • Figure 14 Illustrates schematically the apparatus having one end attached to one truss chord and the other end attached to an adjacent truss chord.
  • Figure 15 Illustrates schematically the apparatus according to this embodiment of the invention.
  • FIG. 16 Illustrates a truss spacer with the grabbing jaw in the "open” position.
  • Figure 17. Illustrates a close up view of the grabbing jaw in the "open” position.
  • Figure 18. Illustrates the grabbing jaw in the "closed” position where truss can be clamped in the grabbing jaw.
  • Figure 19. Is an inverted view of parts of the grabbing jaw particularly illustrating the ratchet mechanism.
  • Figure 20 Illustrates the truss spacer attached to one truss.
  • Figure 21 Illustrates in greater detail the connector which is on the other side of the truss spacer.
  • Figure 22 Illustrates the truss spacer in use and also illustrates the truss controlling device attached to a truss.
  • Figure 23 Illustrates the truss spacer in use and from a different angle.
  • FIG. 24 Illustrates the head portion of the truss controlling device.
  • Figure 25 Illustrates the head portion of the truss controlling device attached to a truss.
  • Figure 26 Illustrates the other side of the truss with the head portion of the truss controlling device attached to the truss.
  • Figure 27 Illustrates the truss controlling device in use.
  • SECOND EMBODIMENT OF SPRING LOADED REMOVABLE SPACER Figure 28 Illustrates a second embodiment of the invention and particularly a different design of the grabbing j aw and in the closed position.
  • Figure 29 Illustrates the grabbing jaw of figure 28 in the open position.
  • Figure 30 Illustrates a Truss Spacer in the Closed “Grabbing” Position.
  • Figure 31 Illustrates the truss spacer of figure 30 in the open “cocked” position.
  • Figure 32 Illustrates a close up view of the truss spacer of figure 31.
  • Figure 33 Illustrates a "underneath" view of the truss spacer and particularly illustrating the springs.
  • Figure 34 Illustrates an upper view of the truss spacer in the open "cocked" position.
  • Figure 35 Illustrates the truss spacer of the third embodiment in position and from one side.
  • Figure 36 Illustrates the truss spacer of figure 35 from the other side.
  • Figure 37 Illustrates the truss spacer of figure 30 from the other side.
  • Figure 38 Illustrates the use of modified truss spacers in a hip roof.
  • Figure 40 Illustrates a location device positioned on a block.
  • Figure 41 Is a plan view of the location device having guided a truss into position.
  • Figure 42 Illustrates a hook assembly attached to a truss and in the "locking" position.
  • Figure 43 Illustrates the hook assembly of figure 42 in the "release" position where the hook can be removed from the trass.
  • Figure 44 Illustrates a truss being supported by a pair of spaced apart hook assemblies.
  • Figure 45 Illustrates a close up of the hook assembly in the position where the elongate flexible member (linked chain) can be locked in place.
  • Figure 46 Illustrates the hook assembly of figure 45 in the "locked” position but without showing the chain.
  • Figure 47 Illustrates the hook assembly in the "released” position where the chain (not illustrated) can be released (this position also being illustrated in figure 43).
  • Figure 48 Illustrates the hook assembly in the "locked” position this time illustrating the chain.
  • Figure 49 Illustrates a side view of the hook assembly of figure 48 in the "locked" position.
  • Figure 50 Illustrates a close up view of the release means which comprises a spring biased sliding plate having a forward slot into which the chain can be held.
  • Figure 51 Illustrates the main components of the hook assembly illustrating the relatively simple yet highly effective design.
  • a relatively simple apparatus 10 which comprises an elongate member 11, which, in the preferred nonlimiting embodiments comprises two telescoping parts and particularly comprises a first part 12 and a second part 13.
  • Figure 2 illustrates first part 12 by itself and figure 4 illustrates second part 13 by itself.
  • the first part 12 of elongate member 11 comprises an elongate channel shaped pressed metal member having a length of between 40-100 cm and which is substantially U-shaped in cross-section.
  • One end of the first part 12 contains the first attachment means 14, and first attachment means 14 is illustrated in close up in figure 3.
  • First attachment means basically comprises a laterally extending member or members 15 formed with openings to enable fasteners to attach the first part 12 to a truss chord 16. This arrangement is illustrated in figure 7.
  • First attachment means further in includes a top plate portion 17 which is best illustrated in figure 2 and figure 3 which extends over the top of truss chord 16 and also contains openings to enable a fastener to fasten the top plate portion 17 to the truss chord.
  • the second part 13 is illustrated in figure 4 and again comprises an elongate somewhat channel shaped member.
  • One end 18 has a more traditional channel shape and is designed to slide within the channel shaped portion of the first part 12 this being illustrated in figure 1.
  • the elongate member 11 is length adjustable by extending or retracting the first part 12 relative to the second part 13.
  • the first part can be locked to the second part by any suitable means and this may comprise the use of drill through fasteners, a pin in hole arrangement, the use of nuts and bolts, the use of clamps, crimping or any other suitable means.
  • the spacing between adjacent trusses is already known and the length of the elongate member can be preset in the factory, or may even be formed integrally and therefore non-telescopically.
  • the other end of the second part 13 contains the second attachment means 19 which, in the particular embodiment, comprises a cutout 20 in the second attachment means.
  • the side walls of the second part in this area about twice as long as the side walls towards the other end 18 of the second part.
  • the cutout is substantially rectangular in shape and is designed to fit over an adjacent truss chord this being best illustrated in figure 8 and figure 9.
  • breakout portions 21 are provided and which can be removed (for instance by snips or something else) to increase the size of the cutout (this may be required if two trusses clamped together).
  • a nose portion 22 (see figure 4) is provided on the leading edge of second part 13 and nose portion 22 has a lower ramped portion 23.
  • the ramped portion 23 allows the truss to be manoeuvred along ramped portion 23 to guide the truss into the cutout 20.
  • the first portion 12 can be screwed or bolted to a first truss (see figure 7) and the second part can then be attached to the first part (or may already be attached to the first part), and, if necessary, the length can be adjusted depending on the spacing between adjacent trusses. All of this can be done while the truss is on the ground.
  • a crane can then be used to lift the first truss and position the first truss and the apparatus 10 will then be "cantilevered" from one side of the truss. It is expected that the first truss may have a number of the apparatus 10 attached to various positions on the truss. Typically, the number will be between 2-6.
  • a second truss can be prepared.
  • the second truss is prepared by fastening one or more apparatus to the second truss in a manner similar to that described with reference to the first truss.
  • the second truss is then lifted into position by a crane and the crane can manoeuvre the truss (or a person standing on the ground can use a line member or some form of truss grab to manoeuvre the truss) such that the truss is pushed underneath the ramped portion 23 which is on each apparatus cantilevered out from the first truss.
  • the apparatus on the first truss will be pushed upwardly slightly and when the second truss aligns with the cutout 20, the apparatus will spring back to the "normal" position where the second truss is firmly positioned within cutout 20 and therefore the second truss is braced and spaced relative to the first truss.
  • the downward force applied by the apparatus on the second truss may be applied by a natural spring tension built into the apparatus or by providing a spring clip or some other type biasing means. It is envisaged that springs or something similar may be incorporated in the first part 12 of the apparatus to allow movement at the mounting point.
  • the apparatus is designed to have an almost fiat profile of no more than 2 or 3 mm over the height of the truss. This allows the apparatus to remain in place as a permanent fixture and will not restrict the use of other materials or bracing that may be necessary in the completion of the roof assembly.
  • the apparatus 30 comprises an elongate member which is of sufficient length to allow it to be positioned between adjacent trusses (see for instance figure 14).
  • the elongate member can be made of metal, plastic, fibreglass and the like and typically comprises a top wall 31 and a side wall 32 which are at an angle relative to each other. Typically, the angle will be 80° but it is envisaged that the angle can be anywhere between 70° - 110°.
  • One end of the apparatus (the rear end) comprises a turned out portion 33 the function of which is to enable the rear end of the apparatus to be nailed or otherwise attached to a truss chord (see for instance figure 10).
  • a relieving cut 34 can be made in the elongate member to assist in the bending out of the turned out portion 33 from the main body of the apparatus.
  • the turned out portion 33 typically has a length of between 30-40 mm but this can vary to suit.
  • the turned out portion can be formed with a number of openings to allow a screw or nail to pass through the opening to securely fasten the apparatus to a truss chord 35.
  • the entire apparatus will be made from an initial flat piece of metal which can be bent to form the particular shape of the apparatus as illustrated in the images. This enables the apparatus to be made cheaply which is advantageous as the apparatus is not be used.
  • the apparatus is made of plastic, it can be extruded into the desired shape and this may also be possible if the apparatus is made of aluminium etc.
  • the other end of the apparatus (e.g. the front end) comprises a ramped nose portion 36 on the side wall 32 and behind the ramped nose portion 36 is a cutout 37 which is sized to fit over an adjacent truss chord 38 (see for instance figure 11, figure 13, figure 14).
  • the cutout 37 is also illustrated in figure 12 and figure 15.
  • the rear end of the truss is nailed, screwed or otherwise attached to a truss chord 35 and this will typically be done safely at ground level.
  • the truss is then lifted into position with the apparatus being cantilevered from the truss.
  • the truss can then be manoeuvred towards an adjacent truss (already in place), and when the front end of the apparatus strikes the adjacent truss chord, it will begin to ride over the truss chord by virtue of the ramped nose portion 36. Because the apparatus is L-shaped (that is, it has the top wall 31 and a side wall 32), it is difficult for the apparatus to be bent upwardly.
  • the apparatus will twist about its longitudinal axis until the front end of the apparatus has ridden over the top of the adjacent truss chord and will then snap into location by having the adjacent truss chord pass into cutout 37.
  • This attached position is clearly illustrated in figure 11 and figure 13 and is illustrated schematically in figure 14.
  • Figure 12 illustrates the "twisting" position where the apparatus is being twisted slightly to ride over the top of the adjacent truss chord 38.
  • the apparatus is left in place.
  • Another apparatus can then be nailed/screwed to a new truss and the new truss is then lifted (typically by a crane) and manoeuvred until this apparatus snap locks against the adjacent truss which is already on the roof.
  • Cross struts can then be added and the roofing sheets can be attached and nailed in place.
  • FIGs 24-27 illustrate a truss controlling device which will be called a "truss grabber".
  • the truss grabber 147 allows a person to manoeuvre a lifted truss (that is a truss that has been lifted by a crane for instance), and especially to manoeuvre the lifted truss to push against the grabbing jaw of an adjacent truss in the manner described above.
  • the truss grabber contains a head portion 145 which is roughly channel shaped but which contains a pair of turned in portions 151 which are angled in a particular manner (see figure 25) to allow the grabber to grab an angled part of a truss 146 (for instance as illustrated in figure 22.
  • Figure 26 illustrates the other side of the truss 146, and shows the turned in portions 151.
  • the head portion is attached to a universal socket arrangement 148 to provide great flexibility to the truss grabber.
  • the socket arrangement 148 is, in turn, attached to a small extension piece 149 (see figure 112) and a long pole (not illustrated) can be attached to the bottom of extension piece 149 via a locking ring 150 (see figure 27).
  • Figure 39 Illustrates a different design of the controller which comprises bend metal rods but generally functioning as described above with reference to figures 24-27.
  • Spring Loaded Removable Spacer
  • a truss spacer 110 which comprises an elongate member 111 one end of which contains a connector 112 and the other end of which contains a grabbing jaw 113.
  • the truss spacer functions to temporarily lock an adjacent pair of trusses in place to assist in the safe erection of trusses. It is envisaged that each truss will contain a truss spacer and that the truss spacer can be reused many times.
  • the elongate member 111 comprises steel box section and typically has a length of between 1-2 m as this is the typical distance between adjacent trusses.
  • Connector 112 is slidingly attached to one end of the elongate member 111.
  • Connector 112 is better illustrated in figure 21 and comprises a first part 114 which is rectangular in cross-section and which is sized such that it can slide over and along elongate member 111.
  • Connector 112 further comprises a second part 115 which is welded to first part and which contains a substantially L-shaped portion containing one side wall 117, a "top" wall 118, a strengthening "gusset” wall 119, and a second side wall 120.
  • the spacing between the sidewalls is such that a portion of a truss can extend between the sidewalls (an example of which is illustrated in figure 20).
  • a tension bolt assembly can be provided to prevent inadvertent removal of connector 112 from the truss.
  • the tension bolt assembly may comprise a threaded rod 121 which is pivotally mounted to one side wall by pivot 122, and where a threaded rod extends through a suitable opening in side wall 117 and a nut 123 which can be rotated to lightly clamp the sidewalls against each side wall of the truss. After use, nut 123 can be loosened to remove (or more correctly pivot away) the threaded rod 121, thereby enabling connector 112 to be removed from the truss.
  • Connector 110 (best illustrated in figure 21), can be clamped at any desirable position on elongate member 111 by a pair of threaded rods 124 which can be rotated to clamp (or counter rotated to loosen) connector 110 to elongate member 111.
  • Grabbing jaw 113 functions to automatically lock against a second trass merely by pushing parts of the second truss against part of the grabbing jaw.
  • Figures 16-19 illustrate one embodiment of the grabbing jaw while figures 28-29 illustrate another embodiment of the grabbing jaw.
  • the grabbing jaw comprises a first jaw member 126, and a second jaw member 127.
  • Second jaw member 127 can move between a "free" position particularly illustrated in figure 16, and a "locking" position particularly illustrated in figure 18 where a trass portion 128 (see figure 20) can be clamped between the jaw members 126, 127.
  • Second jaw member 127 contains an over centre mechanism which means that the second jaw member is pivotally mounted relative to elongate member 111 at a pair of spaced apart positions (129, 130 - best illustrated in figure 18), and is connected to a short rod 131. Movement of rod 131 will cause the second jaw member to move from the free position illustrated in figure 16 to the clamping or locking position illustrated in figure 18.
  • the second jaw member can be returned back to the free position by manually pulling the second jaw member from the position of figure 18 to the position of figure 16.
  • the reverse can be done automatically by "triggering" the second jaw member 127 to move to the locking position illustrated in figure 18.
  • the triggering action is achieved by a mechanism whereby the first jaw member 126 is connected to the triggering action and therefore the first jaw member actually triggers locking of the second jaw member. This is achieved by pushing the first jaw member in the direction of arrow 132. The pushing is carried out by a second trass member being placed against the first jaw member 126 and then pushed against the first jaw member which causes the first jaw member to move in the direction of arrow 312.
  • the first jaw member 126 is attached to an elongate member which is at right angles to the first jaw member and which functions as a "rack" 133.
  • a ratchet mechanism 134 Slidingly attached to elongate member 111 (and best illustrated in figure 19) is a ratchet mechanism 134 which can be slidingly mounted to elongate member 111.
  • the ratchet contains a spring-loaded pawl 136 which engages against rack 133 and which functions in the well-known manner of allowing rack 133 to move in one direction (the direction of arrow 132) but not in the other direction.
  • Ratchet mechanism 134 is mounted to a body member 137 which is box section in shape. One end of the box section is attached to elongate member 111 by locking screws 153 (see figure 16). A measure of adjustability can also be made.
  • the body member 137 contains a boss 138 (see figure 18) to which rod 131 is attached.
  • first jaw member 126 is welded or otherwise attached to rack 133 and is also welded or otherwise attached to an elongate mounting section 154 which is a box section and which slides within body member 137. Put differently, body member 137 can slide over elongate mounting section 154.
  • the second jaw member 127 is pivotally attached to the end of elongate mounting section 154 this being illustrated in figure 17 and figure 18.
  • the ratchet mechanism 134 can be adjustably mounted and releasably locked to body member 137.
  • first jaw member 126 When a force is placed against the first jaw member 126, it will push first jaw member in the direction of arrow 132. This movement will force the rack 133 and the elongate mounting section 154 to also move in the direction of arrow 132 and therefore the elongate mounting section 154 moves into the body member 137. Rod 131 (by being attached to the body member 137) will push against the end of the second jaw member 127 and at some stage the second jaw member will move to its "triggering" position where it will snap down to the clamping position illustrated in figure 18.
  • the distance of movement will probably be between 10-100 mm.
  • the movement of the first jaw member 126 in the direction of arrow 132 is limited by the end of rack 133 abutting against an abutment 152 (see figure 19). Abutment 152 is adjacent the locking screws 153 which are illustrated in figure 16 as well as figure 19.
  • the ratchet mechanism prevents the first jaw member 126 from moving in the other direction (unless released by the spring mounted pawl 136) which means that once the first truss and a second truss are locked in position, there is little likelihood that the trusses can move out of alignment.
  • the truss spacer is initially attached to a "first" truss on the ground, and in particular the attachment is by attaching connector 112 to the first truss while the truss is the on the ground.
  • the grabbing jaw 113 is then pulled to the "open” position illustrated in figure 16.
  • the trass can then be lifted (typically by a crane or similar) and generally into position on top of the walls.
  • the trass spacer will be “cantilevered” to one side of the first trass which is somewhat illustrated in figure 20 (although in figure 20 the first trass 139 is still shown on the ground but this is for illustration purposes only).
  • a "second" trass is then placed on the ground, and a “second” trass spacer is attached to the second trass whilst along the ground and in a manner similar to that described above.
  • the second trass is then lifted into position and while still being lifted by the crane, the second trass can be pushed against the grabbing jaw 113 which is cantilevered from the first trass.
  • the second truss will push against first jaw member 126 which will cause the ratchet mechanism to activate and, at some stage, will trigger the second jaw member to shoot to the locking position thereby locking the second trass in position.
  • the second trass contains its own “second” trass spacer and a "third" trass can have its own trass spacer attached to its prior to being lifted by the crane and the third trass can then press against the open grabbing jaw of the second truss until the grabbing jaw is triggered to clamp against the third trass.
  • first jaw member 140 and a second jaw member 141 with second jaw member 141 being similar to the second jaw member 127 described above in that it can move between an open position (see figure 29) and a closed locking position (see figure 18), and a ratchet mechanism is provided, hi this variation there is also provided an internal spring (not illustrated) which, when triggered, functions to push against connecting rod 142 which, in turn, will cause the second jaw member 141 to trigger to the clamping position.
  • the internal spring is held against actuation by a trigger member 143, and trigger member 143 sits slightly proud of the first jaw member 140 (see figure 29) such that when the truss is pushed against first jaw member 140 it will first slightly depress trigger 143 (to the position illustrated in figure 28) and this will actuate the spring which will trigger the second jaw member to shoot to the clamping position illustrated in figure 28.
  • Figure 38 illustrates the versatility of the truss spacer and especially how two or more spacers can be used to hold the first truss in a hip roof. To explain, In a normal installation of the first truss in a hip roof, the truss is mounted somewhere between 1
  • first truss must be stabilised by a series of temporary props mounted by the worker perched on the truss while the crane is still in control. Only after the first truss is secured can the remaining trusses be installed.
  • a worker can stand on a ladder adjacent the end support wall and grab the top or bottom cord of the first truss with a modified truss spacer and thereby secure the truss to the end support wall.
  • the modified truss spacer ( unit) comprises the grabbing jaws 182 described previously, and the grabbing jaws 182 are attached to a long pole 180, 181 which can be length adjustable and will typically comprise a pair of poles that can be telescopically attached relative to each other and where the length of the pole can be locked using a locking device 183. Also, the poles can be hingedly attached relative to the grabbing jaws by any form of adjustable angle 184.
  • a series of these modified trass spacers can be applied to various points on the truss including the top cord 185 and a bottom (ceiling) chord 186 to stabilise and plumb the truss.
  • a variation in angle can be incorporated in the elongate to accommodate various truss heights and mounting points.
  • the adjustment to the elongate (pole) can be a simple inner and outer sliding tube combination with a threaded or similar locking system 183.
  • the securing and fixing to the end wall 187 is by way of utilising existing wall mounted cleats or by introducing a clamp or similar.
  • a truss spacer according to a third embodiment of the invention.
  • the truss spacer functions in a manner similar to that described with reference to figures 28,29.
  • the truss spacer does not have a ratchet system. Instead, springs are provided to provide the necessary force to retract the second jaw member from the cocked position (open) to the grabbing position (closed).
  • the truss spacer 160 again contains an elongate arm member 161 (which is best illustrated in figure 35 and figure 236).
  • a pair of jaw members is provided comprising a first jaw member 162 and a second jaw member 163.
  • first jaw member 162 does not move and is fixed in place relative to the remainder of the truss spacer.
  • the second jaw member 163 can pivot between the closed grabbing position illustrated in figure 30 and the open cocked position illustrated in figure 31.
  • a trigger 164 is provided which comprises a plate like member positioned inside the first jaw member 162, the first jaw member 162 in the particular embodiment comprising a pair of spaced apart plates 165 (best illustrated in figure 33) such that trigger 164 can be positioned partially between the spaced apart plates 165 (also illustrated in figure 33).
  • the truss spacer according to the third embodiment includes a guide track 166 positioned on each side of the truss spacer.
  • Guide track 166 comprises a forward portion 167 which is generally "L-shaped” and therefore provides a locking position (this will be described below), and guide track 166 comprises a rear portion 168 (illustrated in figure 31 at least) which is not “L-shaped” but is more curved and rounded (the rear portion 168 has a more complex profile which is described in greater detail below).
  • Second jaw member 163 is again pivotally mounted in two spaced apart positions to pivot pins 169, 170, and pin 170 is attached to a slide member 171 which can function as a "pushrod" and, which in the particular embodiment, comprises a substantially U- shaped overhead bracket.
  • Slide member 171 contains a guide pin 173, and guide pin 173 slides along the guide track 66 between the rear position and the front position .
  • guide pin 173 When the second jaw member 163 is in the closed position (figure 30), guide pin 173 is positioned in the rear portion 168 of the guide track 166. When the second jaw member 163 is lifted to the "cocked" position illustrated in figure 31, this causes the slide member 171 and guide pin 173 to be pushed forwardly causing guide pin 173 to be positioned in the forward L-shaped position 167 of the guide track 166.
  • the second jaw member 163 can be moved manually to the cocked position (figure 31) and this can be done quite easily because of the "rounded" curvature of the rear portion 168 of guide track 166 (however it is necessary to initially lift slide member 171 to release it from the rather complicated profile of rear portion 168 and this will be described in greater detail below and with reference to figure 32). Movement of the second jaw member causes the guide pin 173 to move from the position illustrated in figure 30 to the position illustrated in figure 31.
  • the only way that the second jaw member 163 can move back to the grabbing position is by "lifting" the guide pin 173 slightly such that it moves out of the L- shaped front part of the guide track ( can also be called the secondary lock position).
  • the trigger 164 functions to provide the slight lifting action.
  • a pair of springs 172 (illustrated in figure 33) is positioned within the truss spacer. Springs 172 are "activated" when the second jaw member 163 is moved to the cocked position (figure 31), and therefore provide a strong bias or pushing force onto second jaw member 163 to push the second jaw member back into the closed grabbing position (figure 30). However, as long as guide pin 173 is trapped within the L- shaped portion 167 in the guide track 166, this cannot happen.
  • Figures 35-36 show the truss spacer in the locked position.
  • Figure 32 illustrates that the rear portion 168 of the guide track 166 can have a more sophisticated profile and may comprise the rounded area 175 described previously, but also contains a second locking area 176. This can be seen as the primary and the secondary locking ramp.
  • guide pin 173 is in the second locking area 176 and jaw member 163 cannot be simply pulled back to the open cocked in position. This provides a measure of safety against inadvertent opening of the second jaw member. Instead, it is necessary to slightly lift the slide member 171 (also known as the overhead bracket)
  • the first jaw member 162 becomes part of the outer housing of the unit.
  • the springs 172 will typically be under tension.
  • the guide track 166 (see figure 32) has a primary 175 and secondary 176 safety locking ramp system at the rear part of the track. As the guide pin 173 passes over these locking ramps, the inherent design of the unit causes the guide pin 173 to drop down to the primary 175 and then the secondary locking ramp 176 as motion continues. This secures the moving jaw 163 into a safe position.
  • the slide member 171 transfers loaded to the locking pin during the opening motion forcing it to the bottom of the safety locking ramp.
  • the Location Device The Location Device
  • a location device 210 which can be fitted over a block 211, or other type of top wall which will ultimately support a truss/ roof beam or other member which would benefit from the locating device.
  • the block or top wall will contain an attached truss anchoring means which, in the particular embodiment, comprises a cleat 212.
  • Location device 210 has a length of between 20-50 cm and a width of typically between 100-200 mm and is made of metal.
  • the location device contains a pair of opposed sidewalls 213, 214 which depend downwardly and against each side of the block. If desired, the spacing between the sidewalls is such that the location device is pressed over the top of the block with the sidewalls lightly clamping against the side walls of the block to prevent the location device from easily sliding.
  • Each side wall has a width of between 10-500 mm.
  • the sidewalls 213, 214 are interconnected by a pair of top interconnecting members 215, 216 such that the entire location device is somewhat channel shaped.
  • a guide means is provided which, in the particular embodiment, comprises an inclined or ramped wall 217 made of metal.
  • the guide means has a lower end 218 and an upper end 219 and has a length of between 10-30 cm, and is inclined by about 45°.
  • the guide means is attached to each interconnecting member 215, 216 and interconnecting member 216 contains a short upstanding support wall 220 to support the inclined guide means against bowing under the weight of the truss.
  • the forward part of the locating device 210 contains a locking bar 221 which is hinged to one side wall and which moves between a locking position illustrated in figure 40, and a hinged away open position where the locking bar does not extend over the top of the block 211.
  • the locating device 210 can be placed on top of the top wall and in such a manner that the cleat 212 is positioned adjacent the locking bar 221.
  • a locating device 210 will be positioned adjacent each cleat 212 on the top wall and, as each truss will be anchored to two cleats, and a typical roof may contain between 10-50 trusses, there may be provided between 20-100 locating devices on the top wall.
  • a truss 222 (see figure 41) can then be lifted by a crane and roughly positioned close to the cleat and then lowered such that the bottom part of the truss strike some part of the inclined wall 217.
  • the truss can then be lowered a little bit more and the weight of the truss will cause it to slide down the inclined wall and against the cleat. If necessary, a worker may need to slightly manoeuvre the truss.
  • the truss can then be temporarily locked in place, and this can be done by temporarily nailing a batten between adjacent trusses (which is quite normal), or using one or more truss clamps or truss spacers ..
  • the various locating devices 210 can be removed, and the trusses can be nailed or otherwise fastened to the cleats. It is also envisaged that the trasses are fastened to the cleats prior to removal of the locating device.
  • the hook assembly comprises a rigid substantially L-shaped body 312 which, in the embodiment, comprises a pair of spaced apart L-shaped members 313, 314 (one member 313 being illustrated in figure 51), and other illustrations (for instance figure 50) illustrating both members 313, 314.
  • Each L-shaped member is made of plate steel having a thickness of about 5 mm.
  • each L-shaped member comprises a first generally upright portion 315 (see for instance figure 51), and a second generally horizontal portion 316 (see figure 51 ) in use. Upright portion 315 and generally horizontal portion 316 are also illustrated in various other illustrations including figure 43.
  • the first portion 315 has a length of between 20-40 cm and the second portion 316 is slightly shorter having a length of between 10-30 cm. hi the particular embodiment, portion 315 and portion 316 are at right angles to each other and formed from a single plate of material as illustrated in figure 51. Each portion has a width of between 2-10 cm.
  • Each L-shaped member 313, 314 (see for instance figure 51 ) is provided with a series of openings which comprise round openings and elongate openings. The reason for these openings will be described in greater detail below.
  • the L-shaped members 313, 314 are spaced apart by a distance of between 10-50 mm and this is achieved by a number of strong bolts which pass through some of the round openings illustrated in figure 51. hi the particular embodiment, and possibly best illustrated in figure 49), the two L-shaped members are held together by four main bolts 318-321. A sleeve or collar is provided between the spaced apart L-shaped members to hold the members rigidly together.
  • each L-shaped member is provided with a small abutment to stop material from simply sliding off portion 316.
  • the abutment comprises a small metal plate 322 (see figure 51) which is bolted to each portion 316 of each L-shaped member.
  • two metal plates 322 are provided. These metal plates 322 are illustrated in various figures and referenced in figure 45 figure 49 and figure 51.
  • Each metal plate has a length of between 4-10 cm and is bolted by two bolts on each portion 316. The advantage of this is that the metal plates can be quite easily removed and replaced by longer or differently configured plates depending on the material that is to be lifted.
  • a release means is provided between the pair of spaced apart L-shaped members 313, 314 and mainly in the upper portion 315.
  • the release means is best illustrated in figures 45-47 and also figure 50 and figure 51 Referring initially to figure 51 , the release means comprises a metal plate 323.
  • Metal plate 323 contains small extending tabs 324 extending from each longitudinal edge of the metal plate. These tabs 324 are adapted to slide within the elongate slots 325 on each L-shaped member 313, 314.
  • metal plate 323 is illustrated in position between the spaced apart L-shaped members 313, 314.
  • the "upper" end of metal plate 323 contains an open ended slot 326 which is referenced in figure 46 and figure 51.
  • Slot 326 functions to engage against the elongate flexible member which, in the particular embodiment, comprises a linked chain 327.
  • Chain 327 is referenced in figure 49 and figure 48 at least, hi figure 48, there is illustrated chain 327 having one link inserted in the slot 326 on the front of plate 323.
  • Figures 45-47 illustrate the arrangement without the chain.
  • Plate 323 can move between a "forward" chain locking position illustrated in figure 48, figure 49, figure 45 and figure 46, and a pulled back or “retracted” free position illustrated at least in figure 47 (and also in figure 43).
  • Plate 323 is biased into the forward locking position (e.g. figure 46) by a pair of springs 328 which are illustrated in figure 50.
  • Springs 328 have a lower end attached to a lower part of plate 323 and an upper part attached to a pin 329 which extends between members 313, 314 and through one of the round openings in each member.
  • the springs function to "pull" plate 323 into the forward locking position illustrated at least in figure 46.
  • Plate 323 can be pulled downwardly into the retracted position by a connecting member which, in the particular embodiment, comprises a nylon rope 330 which is illustrated in figure 42 and figure 43. Nylon rope 330 is attached to a metal coupling 331 on the lower end of plate 323 and the metal coupling 331 is illustrated at least in figure 46. The retracted position of plate 323 is illustrated at least in figure 47.
  • a connecting member which, in the particular embodiment, comprises a nylon rope 330 which is illustrated in figure 42 and figure 43.
  • Nylon rope 330 is attached to a metal coupling 331 on the lower end of plate 323 and the metal coupling 331 is illustrated at least in figure 46.
  • the retracted position of plate 323 is illustrated at least in figure 47.
  • the hook assembly of the particular embodiment comprises a further component which is a metal flap 332.
  • Metal flap 332 is illustrated in various figures including figures 45-48. Flap 332 can move between a closed position illustrated in figure 46 and figure 48 and a pivoted away open position illustrated in figure 45 and figure 47.
  • the flap 332 is pivotally attached between the L-shaped members 313, 314 and is not attached to plate 323.
  • the flap will be described with reference to figures 45-47 and figure 48, and is basically designed to prevent the chain from inadvertently being removed from the slot 326 in the front of plate 323.
  • the hook assembly 310 can be lowered to ground level and a truss 311 (or something else) can be placed in an upright position (while still on the ground).
  • the horizontal portion 316 of the hook can then be placed underneath a portion of the truss (see figure 42). All this can be done while the person is standing on the ground.
  • the chain 327 can extend over the top of the truss
  • the flap 332 can be pivoted to an open position and this position makes it easier to initially thread the chain into the slot.
  • the release means can instead stay in the naturally extended position and the flap can be pivoted to the open position (see figure 45) which provides enough room to allow the chain to be inserted into the slot.
  • the flap can be rotated back to the closed position (see figure 46 and figure 48) and the chain can not be removed.
  • the rope 330 can be pulled which will retract the release means (plate 323) to pull the release means away from the flap.
  • the bolt 319 is strategically positioned (best illustrated in figure 47) such that when the plate 323 is pulled back, the chain 327 will be held back by being positioned above bolt 319 and will be forced out of slot 326.
  • the hook assembly can be swung away from the truss (see figure 43) and in doing so, the released chain will be pulled out of the upper part (315) of the hook assembly.
  • the other end of the chain is bolted or otherwise securely attached to the end of the lower part 316 of the hook assembly as illustrated in figure 43.
  • the hook assembly can then be lowered to ground level and another truss can be attached in the manner described above and lifted into position and the hook assembly can be released by yanking on rope 330, and pulling back the hook assembly to make the chain slide out of engagement with the upper part 315 of the hook assembly.
  • the arrangement provides a high degree of security as, when the chain is locked in position, it is almost impossible for the chain to become inadvertently released. However, the chain can be quite easily released by yanking on rope 330.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

La présente invention concerne un système et divers dispositifs pouvant contribuer à l'espacement et au renforcement de fermes adjacentes ne nécessitant pas la présence d'une personne debout sur les murs pour le réaliser.
PCT/AU2007/001233 2006-09-20 2007-08-27 Système pour le montage et le maintien de fermes de toit WO2008034165A1 (fr)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
AU2006220401 2006-09-20
AU2006220397A AU2006220397B8 (en) 2006-09-20 2006-09-20 A twist on truss controller
AU2006220397 2006-09-20
AU2006220401A AU2006220401A1 (en) 2006-09-20 2006-09-20 A Truss System with Locator
AU2006235856 2006-11-01
AU2006235856A AU2006235856B1 (en) 2006-09-20 2006-11-01 Spring loaded removable spacer
AU2007200211A AU2007200211B1 (en) 2007-01-18 2007-01-18 A Quick Release Lifting Hook
AU2007200211 2007-01-18
AU2007900560A AU2007900560A0 (en) 2007-02-06 Truss Spacing and Bracing Apparatus
AU2007900560 2007-02-06

Publications (1)

Publication Number Publication Date
WO2008034165A1 true WO2008034165A1 (fr) 2008-03-27

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ID=39200068

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2007/001233 WO2008034165A1 (fr) 2006-09-20 2007-08-27 Système pour le montage et le maintien de fermes de toit

Country Status (1)

Country Link
WO (1) WO2008034165A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7484310B2 (en) * 2004-05-19 2009-02-03 Frook Pty Ltd Clamp assembly
GB2469060A (en) * 2009-03-31 2010-10-06 Paul Ashley Smith Roof truss support clamp
US8683772B2 (en) 2008-06-02 2014-04-01 Simpson Strong-Tie Company, Inc. Truss mounting brace
US11236509B2 (en) * 2019-06-18 2022-02-01 Steve Kerns Permanent truss tie
CN114517586A (zh) * 2022-03-10 2022-05-20 安徽伟宏钢结构集团股份有限公司 一种钢结构提升过程中调整位置偏移的方法
CN116335419A (zh) * 2023-05-24 2023-06-27 四川省第一建筑工程有限公司 一种装配式建筑定位装置

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GB2029484A (en) * 1978-08-26 1980-03-19 Cartwright P Method and gauge for use in erecting roof trusses
US4246736A (en) * 1979-04-02 1981-01-27 Kovar Paul J Joist bridging member
US4490956A (en) * 1983-01-07 1985-01-01 Gang-Nail Systems, Inc. Truss spacer
US4704829A (en) * 1987-02-27 1987-11-10 Baumker Jr Andrew J Building truss clamp devices
WO1996029180A1 (fr) * 1995-03-20 1996-09-26 Browning Douglas A Procede et appareil de fixation de fermes
FR2734252A1 (fr) * 1995-05-19 1996-11-22 Studia Dispositif a branche articulee pour le maintien et la liberation d'une charge par rapport a un referentiel
US5884411A (en) * 1996-12-23 1999-03-23 Raber; William G. Truss alignment apparatus
WO2001069000A1 (fr) * 2000-03-10 2001-09-20 Mitek Holdings, Inc. Contrevent d'entretoises et structure d'entretoises le comprenant
US6354055B1 (en) * 1999-09-01 2002-03-12 Elbert W. Shaw Method and apparatus for building roof construction
US6375242B1 (en) * 2000-09-14 2002-04-23 David Zingerman Load clipping device for crane
EP1213399A2 (fr) * 2000-12-03 2002-06-12 Simpson Strong-Tie Co., Inc. Espaceur et contrevent d'entreroises de toiture
US20050117999A1 (en) * 2003-11-28 2005-06-02 Harv Lillegard Method and apparatus for truss rollout
US20060196068A1 (en) * 2005-03-01 2006-09-07 Thompson Robert K Truss stabilizer and spacing apparatus

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029484A (en) * 1978-08-26 1980-03-19 Cartwright P Method and gauge for use in erecting roof trusses
US4246736A (en) * 1979-04-02 1981-01-27 Kovar Paul J Joist bridging member
US4490956A (en) * 1983-01-07 1985-01-01 Gang-Nail Systems, Inc. Truss spacer
US4704829A (en) * 1987-02-27 1987-11-10 Baumker Jr Andrew J Building truss clamp devices
WO1996029180A1 (fr) * 1995-03-20 1996-09-26 Browning Douglas A Procede et appareil de fixation de fermes
FR2734252A1 (fr) * 1995-05-19 1996-11-22 Studia Dispositif a branche articulee pour le maintien et la liberation d'une charge par rapport a un referentiel
US5884411A (en) * 1996-12-23 1999-03-23 Raber; William G. Truss alignment apparatus
US6354055B1 (en) * 1999-09-01 2002-03-12 Elbert W. Shaw Method and apparatus for building roof construction
WO2001069000A1 (fr) * 2000-03-10 2001-09-20 Mitek Holdings, Inc. Contrevent d'entretoises et structure d'entretoises le comprenant
US6375242B1 (en) * 2000-09-14 2002-04-23 David Zingerman Load clipping device for crane
EP1213399A2 (fr) * 2000-12-03 2002-06-12 Simpson Strong-Tie Co., Inc. Espaceur et contrevent d'entreroises de toiture
US20050117999A1 (en) * 2003-11-28 2005-06-02 Harv Lillegard Method and apparatus for truss rollout
US20060196068A1 (en) * 2005-03-01 2006-09-07 Thompson Robert K Truss stabilizer and spacing apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7484310B2 (en) * 2004-05-19 2009-02-03 Frook Pty Ltd Clamp assembly
US8683772B2 (en) 2008-06-02 2014-04-01 Simpson Strong-Tie Company, Inc. Truss mounting brace
GB2469060A (en) * 2009-03-31 2010-10-06 Paul Ashley Smith Roof truss support clamp
US11236509B2 (en) * 2019-06-18 2022-02-01 Steve Kerns Permanent truss tie
CN114517586A (zh) * 2022-03-10 2022-05-20 安徽伟宏钢结构集团股份有限公司 一种钢结构提升过程中调整位置偏移的方法
CN116335419A (zh) * 2023-05-24 2023-06-27 四川省第一建筑工程有限公司 一种装配式建筑定位装置
CN116335419B (zh) * 2023-05-24 2023-09-19 四川省第一建筑工程有限公司 一种装配式建筑定位装置

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