US20170314264A1 - Method for assembling a weather-protecting roof truss and a weather-protecting roof truss bundle - Google Patents

Method for assembling a weather-protecting roof truss and a weather-protecting roof truss bundle Download PDF

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Publication number
US20170314264A1
US20170314264A1 US15/522,320 US201515522320A US2017314264A1 US 20170314264 A1 US20170314264 A1 US 20170314264A1 US 201515522320 A US201515522320 A US 201515522320A US 2017314264 A1 US2017314264 A1 US 2017314264A1
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US
United States
Prior art keywords
trusses
roof
bundle
roof truss
weather protection
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US15/522,320
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English (en)
Inventor
Lauri AHONEN
Leevi AHONEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vetokatto Oy
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Vetokatto Oy
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
Application filed by Vetokatto Oy filed Critical Vetokatto Oy
Assigned to VETOKATTO OY reassignment VETOKATTO OY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Ahonen, Lauri, AHONEN, Leevi
Publication of US20170314264A1 publication Critical patent/US20170314264A1/en
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B7/00—Roofs; Roof construction with regard to insulation
    • E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
    • E04B7/022—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs consisting of a plurality of parallel similar trusses or portal frames
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/348—Structures composed of units comprising at least considerable parts of two sides of a room, e.g. box-like or cell-like units closed or in skeleton form
    • E04B1/34815—Elements not integrated in a skeleton
    • 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
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/17—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with non-parallel upper and lower edges, e.g. roof trusses
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D12/00—Non-structural supports for roofing materials, e.g. battens, boards
    • E04D12/002—Sheets of flexible material, e.g. roofing tile underlay
    • 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
    • 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
    • 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
    • E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
    • E04G21/242—Safety or protective measures preventing damage to building parts or finishing work during construction for temporarily covering the whole worksite, e.g. building, trench
    • 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
    • E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
    • E04G21/28—Safety or protective measures preventing damage to building parts or finishing work during construction against unfavourable weather influence

Definitions

  • the present invention relates to a method as set forth in the preamble of claim 1 for the installation of a weather-protective roof truss, and to a weather-protective roof truss package as set forth in the preamble of claim 4 .
  • the invention described in this patent application relates to a solution comprehensively more efficient than the current practice and prior known technology for the installation of roof trusses, roof sheathing and gable elements.
  • Making use of the invention enables, remarkably more rapidly and efficiently than before, the installation of a weather protection in conjunction with the construction of permanent roof structures for buildings (such as for example all small houses or single-family houses: a detached house, a row house, a leisure time house, and the like), which at the same time improves substantially the safety of roofing jobs, pre-empts water damage occurrences during construction, and allows for roofing jobs also in varying climate conditions.
  • the construction jobs can be continued as usual, for example by the installation of roof battens and coverings.
  • a method according to the invention comprises using a prefabricated roof truss package in which the individual trusses are disposed side by side for a bundle and previously provided with a weather protection present in a pleated condition on top of the truss bundle; unfolding the bundle at construction site in such a way that the adjacent trusses become locked at a certain distance from each other by means of brace members included in the trusses and at the same time the weather protection unfolds to cover the trusses and the intervening space, and finally fastening the individual trusses by outer edges thereof to the upper runners.
  • a roof truss package according to the invention is characterized in that the roof truss package is provided at a manufacturing plant with a weather protection which is attached to the trusses, that the roof truss package has its trusses arranged for a bundle in which the weather protection is in a pleated condition, and that the trusses are provided with brace members capable of locking the adjacent trusses at a certain distance from each other as the bundle is unfolded.
  • weather protection is a term used generally in reference to any type of structure or material affording protection against the weather and also functioning at the same time as roof sheathing and/or condensation sheathing for a roof structure to be subsequently completed.
  • the material for the trusses is preferably wood, but the invention is not limited solely to timber-based trusses.
  • Making use of the invention enables, remarkably more rapidly and efficiently than before, the installation of a weather protection along with the construction of permanent roof structures for buildings (such as for example all small houses or single-family houses: a detached house, a row house, a leisure time house, and the like), which at the same time improves substantially the safety of roofing jobs, pre-empts water damage occurrences during construction, and allows for roofing jobs also in varying climate conditions.
  • the construction projects can be continued as usual, for example by the installation of roof battens and coverings.
  • the solution according to the invention allows for the manufacture and rapid installation of a prefabricated weather-protective robust roof truss.
  • the solution according to the invention provides a considerable time saving, even up to about 90% faster installation, in the installation of a weather-protective roof, and an improvement in occupational safety with lesser demand for climbing.
  • the installation of roof structures in a weather-protective manner as set forth in the invention can be carried out even in just roughly 1-2 hours.
  • the mold problems caused in the structures by moistures during construction will be substantially mitigated.
  • the quality of roof building in conventional construction work is dependent on the builder's skills while, when using the solution of the invention, the workmanship remains at high standard and consistent regardless of a person doing the work.
  • the invention cuts back substantially the total completion time of a building as it reduces the roof building time and allows for an earlier commencement of interior jobs.
  • the invention provides savings in materials and transportations and overall costs.
  • a solution for the installation of a roof truss comprises “a weather protection bundle” which in turn comprises roof trusses, a roof sheathing, and gable elements as an assembly that can be produced industrially, in controlled conditions, and in a material efficient manner.
  • a weather protection bundle is made possible by innovative, if desired recyclable components and solutions which enable an operation according to the invention by using commercially available components as trusses, a roof sheathing and gable elements. Therefore, the question is about a comprehensive invention making use of the entire industry, which differs from all prior known techniques in the sense that the weather protection during construction time is achieved without supplementary structures (e.g. a tent around the building or other structures necessary for establishing weather protection and not a permanent part of the house under construction), thereby incurring extra costs.
  • supplementary structures e.g. a tent around the building or other structures necessary for establishing weather protection and not a permanent part of the house under construction
  • Mold and water damage occurrences constitute a significant problem in terms of national economy. Most of the mold damage occurrences stem from exposure to moisture during construction work. In practice, the water damage occurrences in exterior structures develop most frequently in conditions wherein the structures (such as walls) are exposed to moisture before other permanent structures (such as the roof) have been put in place.
  • the construction time is without specific measures usually restricted to seasons that enable installation projects to be conducted with a minimum risk of damaging the structures during construction.
  • this entails that for example roofing jobs are limited to a minimum, among other things, when it is raining or snowing, because the structures do not withstand rains to significant extent.
  • roofing jobs occupy a central role in the house building project, other construction work of the building will be delayed respectively as long as the roofing jobs cannot be carried out and the structures thereby protected from elements (in other words be “weather-protected”). Accordingly, for example in Finland and in numerous other countries where conditions are not rainless and warm throughout the year, the effective and safe construction seasons for buildings is restricted to just a few months of the year.
  • weather protection standard At the request of Ministry of the Environment and by working with universities, the construction industry has for a long time endeavored to create a standard that would define measures during construction for preventing these water damage occurrences in construction time (a so-called “weather protection standard”).
  • An objective of the weather protection standard is to ensure for the structures such a protection during construction that water damage cases and resulting major financial and health-related setbacks shall not take place. Even despite years of efforts by the authorities, a solution to the weather protection problem has not been found prior to coming up with the present invention.
  • the currently employed methods are based on protecting a building with a sheathing separate from the building, such as for example by constructing “a tent” upon the building for the duration of construction.
  • a tent Such a solution is loose from the actual structures and it must be constructed separately for protecting the building.
  • the construction of a separate protective sheathing postpones the commencement of construction works as well as increases construction costs substantially.
  • the construction of a separate protective sheathing is followed by the actual roof building work with conventional methods on a conventional schedule.
  • the weather protection can be established without separate procedures (and without putting on separate tarps) along with the ongoing installation of roof trusses.
  • roof trusses Since the installation of roof trusses can be conducted with the present invention on average even up to 90% faster than with traditional methods, the structures will be provided with weather protection considerably sooner and, therefore, the risk of water damage occurrences is remarkably mitigated. With the invention presented in the patent application, weather protection during construction is accomplished considerably faster and more cost effectively than with the prior known competing method (a separate “tent”/tarp system).
  • the installation of roof trusses can be followed by proceeding faster to the finishing installation of battens and roof surface materials, whereby the final completed roof structure and hence a protection for the building in its final condition is also achieved faster.
  • the present invention also allows for a certification of the construction method in a manner that enables the rapid installation of weather protection to be documented for a client who has ordered the house. This is another aspect that promotes construction quality as well as customer safety.
  • the present invention has an objective of providing an improved method for the installation of roof structures, a weather-protective roof truss, as well as providing an innovative roof truss package the utilization of which enables the foregoing objectives to be attained.
  • the invention according to this patent application reduces remarkably the hazard of water damage incidents during construction, expedites the installation of a roof, as well as the building construction work to continue in various weather conditions, the invention according to this patent application can also be used for significantly improving the safety of building construction work.
  • roof working jobs involve particularly a risk of falling from height, which is why the fall protections for roof work sites are specifically regulated in the Council of State Ordinance on the safety of construction work. Hence, measures mitigating the hazardousness of roof jobs are profoundly meaningful in construction industry.
  • the roof truss is installed from outside the building manually regardless of whether or not the above-discussed “tent” is used as a weather protection.
  • the installation of roof trusses from outside nevertheless requires very hazardous climbing movements on top of the roof trusses undergoing installation.
  • the installation of roof trusses from outside necessitates the installation and use of hoists and scaffolds, which is time consuming, expensive and likewise involves risks from the standpoint of occupational safety.
  • the method according to the invention for the installation of roof truss can be carried out from inside the building manually after the roof truss package has been placed at one of the gables of the house or at some other starting point. Consequently, making use of the invention according to this patent application renders it possible to reduce significantly the risks of workplace accidents in the installation process of roof trusses since the installation, as opposed to traditional techniques, does not require hazardous climbing movements on top of the roof trusses.
  • the roof construction work progresses conventionally to roof finishing work such as, among others, the installation of battens and roof surface materials.
  • This work necessitates setting up safety rails and other safety equipment, which in its part increases occupational safety risks.
  • the roof truss bundles can be pre-fitted at the factory with safety rails needed for the installation of a roofing (such as for example battens and metal roofing, clay tile roofing or other roofing). This both expedites the installation of roofing and improves remarkably occupational safety as the safety features need not be installed on site for the roof finishing work.
  • the roof work reducing, roof work nature changing, as well as use-of-safety features facilitating effect of the present invention, and the occupational safety improving substantially as a result thereof, constitutes in and of itself a highly significant innovation and a remarkable improvement with respect to the prior art and its longstanding problems.
  • FIG. 1 shows one roof truss package for use in a method of the invention at a commencement stage of installation
  • FIG. 2 shows the roof truss package of FIG. 1 in a partially installed condition
  • FIGS. 3 a , 3 b show one detail in a roof truss of the invention.
  • FIG. 4 shows a roof truss of the invention in an isometric view.
  • a roof truss package in the form of a bundle which is lifted with a hoist onto the roof and placed at one gable of the house or at some other desired starting point and braced to an upright position from an outermost truss 3 .
  • a bundle 1 has been hoisted to the upper part of a building onto top runners 6 of the building's opposite walls 7 at one gable of the building.
  • the top runners are mounted to rest on load-bearing upright posts of the walls.
  • FIG. 1 shows also one exemplary embodiment of a roof gable element, which comprises an eaves section 12 and a gable wall section 13 , said gable element having been preferably pre-fitted at the factory to the attachment with the roof truss at both ends thereof.
  • Prefabrication in this context refers to manufacturing conducted in a factory building or the like sheltered space irrespective of whether the production is automated or mechanized or manually conducted production.
  • the eaves section 12 comprises fascia boards 18 and soffit boards 19 .
  • the gable wall section 13 includes studwork 14 , which is fastened to an outermost truss 3 of the bundle 1 and to which is fastened a wind protection slab 15 . On top of the wind protection slab is mounted studwork 16 with exterior wall panels 17 fastened thereto.
  • FIG. 2 shows a bundle in a partially unfolded condition.
  • the unfolding can be conducted e.g. by means of a winch or a hoist.
  • the installation is conducted from inside the building by using a remote controller for manipulating the winches which operate the installation cradle.
  • the trusses are fitted with lower brace member 4 and upper brace members 5 capable of locking the trusses at a predetermined distance from each other to provide a previously supported structure, wherein individual trusses, except for the first truss, need not be separately supported on the building frame structures.
  • the number of each of the brace members 4 and 5 is at least two per truss.
  • FIGS. 3 a , 3 b show one preferred embodiment of the lower brace members 4 more closely in schematic views of principle.
  • FIG. 3 a depicts a starting condition
  • FIG. 3 b shows a condition in which a truss 3 ′ next to the gable truss 3 has been removed from the gable truss to a distance defined by the brace member 4 .
  • the brace member 4 consists of a two-component support, having first and second support arms 4 a , 4 b which are pivotally connected at one end thereof to the trusses 3 and 3 ′, respectively, and at the other end thereof to each other with an articulated joint 4 c capable of locking the support arms to each other while defining a distance between the trusses 3 , 3 ′.
  • the upper brace members 5 are designed similarly as a two-component unit. The number of brace members 4 and 5 is typically 4-6 in each inter-truss space.
  • the brace members are preferably accompanied by clamping elements which keep the truss bundle intact and, upon unclamping, release the brace members of the next inter-truss space to unfold as the truss bundle is advanced.
  • the material for the brace members can be e.g. metal, plastics or wood or various combinations thereof.
  • the roof truss bundle is previously equipped at the factory with a weather protection 2 , which is in a pleated condition on top of the bundle 1 and in attachment with the trusses, such that, as the bundle is being unfolded, the weather protection straightens out to cover the space between adjacent trusses.
  • a weather protection 2 which is in a pleated condition on top of the bundle 1 and in attachment with the trusses, such that, as the bundle is being unfolded, the weather protection straightens out to cover the space between adjacent trusses.
  • the weather protection can have two or more layers, thereby facilitating the use of new materials more advanced in terms of their absorption/breathability or insulating properties.
  • a roof truss of the invention can be previously unfolded even on the platform of a transport vehicle, on retractable rails or on the ground, and then hoisted onto the roof, whereby all that is necessary to do on the roof is to fasten the trusses to the upper runners.
  • FIG. 4 shows in a schematic isometric view a roof truss in a partially unfolded condition.
  • the weather protection 2 is in this example fastened to individual trusses by means of ventilation ribs 11 .
  • the weather protection is provided separately on both slopes of the roof for enabling the pleating thereof for transport.
  • On top of the ventilation ribs 11 at the roof apex will be provided a separate weather protection strip (not shown), which enables effective ventilation in a completed roof structure and protects a ventilation gap of the weather protection 2 developing at the apex.
  • the strip can be previously mounted on top of the ventilation ribs 11 of the weather protection 2 on one of the slopes to facilitate its installation while the roof truss is in a completely unfolded condition.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Tents Or Canopies (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
US15/522,320 2014-10-30 2015-10-28 Method for assembling a weather-protecting roof truss and a weather-protecting roof truss bundle Abandoned US20170314264A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20145950 2014-10-30
FI20145950A FI20145950A (fi) 2014-10-30 2014-10-30 Menetelmä säältä suojaavan kattoristikon asentamiseksi ja säältä suojaava kattoristikkopaketti
PCT/FI2015/050740 WO2016066900A1 (fr) 2014-10-30 2015-10-28 Procédé de montage d'une ferme de toit contre les intempéries et d'un faisceau de fermes de toit contre les intempéries

Publications (1)

Publication Number Publication Date
US20170314264A1 true US20170314264A1 (en) 2017-11-02

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US15/522,320 Abandoned US20170314264A1 (en) 2014-10-30 2015-10-28 Method for assembling a weather-protecting roof truss and a weather-protecting roof truss bundle

Country Status (9)

Country Link
US (1) US20170314264A1 (fr)
EP (1) EP3212857A4 (fr)
JP (1) JP2017533365A (fr)
CN (1) CN107109842A (fr)
AU (1) AU2015340419A1 (fr)
CA (1) CA2965583A1 (fr)
FI (1) FI20145950A (fr)
MX (1) MX2017005617A (fr)
WO (1) WO2016066900A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20175217L (fi) * 2017-03-08 2018-09-09 Brand Building Oy Menetelmä katon rakentamiseksi
CN108952182B (zh) * 2018-08-31 2021-01-19 中国一冶集团有限公司 三角桁架的组装方法
CN113802885A (zh) * 2021-08-31 2021-12-17 上海宝冶集团有限公司 一种旋流池施工方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603171A (en) * 1947-03-26 1952-07-15 H W Martin Building structure
SU487212A1 (ru) * 1971-02-11 1975-10-05 Ордена Трудового Красного Знамени Московский Архитектурный Институт Пространственна перекрестностержнева конструкци
US3959945A (en) * 1975-05-09 1976-06-01 David Allen Roof truss spacer
JPS52134224A (en) * 1976-05-04 1977-11-10 Sekisui House Kk Execution method of roof in prefabricated house and roof material used for this method
SE446111B (sv) * 1981-03-16 1986-08-11 Profoment Utvecklings Ab Sett att montera en takkonstruktion samt anordning for utforande av settet
US4397492A (en) * 1981-08-27 1983-08-09 Craig William R Roof truss suspension
JP2534580Y2 (ja) * 1992-03-19 1997-04-30 株式会社淺沼組 全天候施工用仮設屋根構造
JP3381090B2 (ja) * 1993-12-16 2003-02-24 日工株式会社 建築現場の仮設屋根
JPH1122203A (ja) * 1997-06-27 1999-01-26 Maeda Corp 開閉式仮設屋根
AUPR228400A0 (en) * 2000-12-28 2001-01-25 Bhp Steel (Jla) Pty Limited Metal roof truss
JP2003119948A (ja) * 2001-10-10 2003-04-23 Penta Ocean Constr Co Ltd 張弦梁を使用した仮設膜式開閉屋根構造
PT1891277E (pt) * 2005-06-16 2014-01-14 Deployable Structures Internat Pty Ltd Edifício modular pré-fabricado
WO2012045160A1 (fr) * 2010-10-08 2012-04-12 Francklin Ash Dispositif de support pour système de ferme
US9085888B2 (en) * 2012-11-13 2015-07-21 Kevin S. Fuller Structural support spacer
CN103967285A (zh) * 2014-05-22 2014-08-06 中建安装工程有限公司 一种网架长距离高空同步滑移的方法

Also Published As

Publication number Publication date
CA2965583A1 (fr) 2016-05-06
CN107109842A (zh) 2017-08-29
EP3212857A1 (fr) 2017-09-06
MX2017005617A (es) 2018-03-01
WO2016066900A1 (fr) 2016-05-06
JP2017533365A (ja) 2017-11-09
FI20145950A (fi) 2016-05-01
EP3212857A4 (fr) 2018-06-13
AU2015340419A1 (en) 2017-06-22

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Owner name: VETOKATTO OY, FINLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AHONEN, LAURI;AHONEN, LEEVI;REEL/FRAME:042159/0964

Effective date: 20170426

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Free format text: FINAL REJECTION MAILED

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION