CA1130529A - Structural member - Google Patents
Structural memberInfo
- Publication number
- CA1130529A CA1130529A CA368,473A CA368473A CA1130529A CA 1130529 A CA1130529 A CA 1130529A CA 368473 A CA368473 A CA 368473A CA 1130529 A CA1130529 A CA 1130529A
- Authority
- CA
- Canada
- Prior art keywords
- chord
- pair
- web
- member according
- cross
- 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.)
- Expired
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
- F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
- F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
- F16B2/12—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using sliding jaws
-
- 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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
- E04G11/20—Movable forms; Movable forms for moulding cylindrical, conical or hyperbolical structures; Templates serving as forms for positioning blocks or the like
- E04G11/28—Climbing forms, i.e. forms which are not in contact with the poured concrete during lifting from layer to layer and which are anchored in the hardened concrete
-
- 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/002—Workplatforms, railings; Arrangements for pouring concrete, attached to the form
-
- 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/04—Connecting or fastening means for metallic forming or stiffening elements, e.g. for connecting metallic elements to non-metallic elements
- E04G17/042—Connecting or fastening means for metallic forming or stiffening elements, e.g. for connecting metallic elements to non-metallic elements being tensioned by threaded 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
- E04G17/0651—One-piece 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
-
- 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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
- E04G11/50—Girders, beams, or the like as supporting members for forms
- E04G2011/505—Girders, beams, or the like as supporting members for forms with nailable or screwable inserts
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
ABSTRACT
The invention relates to a structural member such as a beam or joist the upper and lower chords of which have outwardly projecting flanges terminating in stub flanges. Each stub flange is profiled to provide a pair of converging surfaces whereby the cross-section is substantially conical.
The invention relates to a structural member such as a beam or joist the upper and lower chords of which have outwardly projecting flanges terminating in stub flanges. Each stub flange is profiled to provide a pair of converging surfaces whereby the cross-section is substantially conical.
Description
~13~52~
This invention relates to a structural member such as a beam or joist for use in concrete forming structures for the purpose of supporting poured concrete in walls, columns and slabs employed in the building industry~ One such joist or beam forms the subject of our Canadian Patent No. 941,123 which issued on February 5th, 1975 and which includes a cold-rolled substantially U-shaped channel or top chord which has elastically deformable side walls capable of being sprung outwardly to admit a wooden nailable insert into the channel;a lower chord spaced from the top chord by primary and secondary chord connecting means; and a pair of slotted nailer-plates each located at an opposite end of the joist. This structural member, although admirable for its purpose proved to be heavy and somewhat costly to manufacture.
A still further known type of beam or joist is manufactured from extruded aluminum. This type of joist also has a U-shaped channel or upper chord into which a wooden joist member or insert is forced with the inner surfaces of said channel being provided with serrations to inhibit movement of the insert upwa`rdly in a vertical plane, and, hence, to separate from the channel member. However, this type of structural member suffered from the disadvantage that it was difficult to remove damaged wooden inserts from the channel.
In consequence a further type of extruded aluminum joist was evolved and this type forms the subject of our Canadian Patent No. 1,045,34~ which issued on October 2nd, 1979 and which included a U-shaped channel to contain a wooden insert with ~he inner walls of the channel diverging away from one another towards the bottom of the channel thus making it easier to remove said } ~ ~ , . .
'. ' ' : . ` .',. . .:. , ~05;~9 insert.
soth of the last mentioned structural members included a slot in the lower chord to accommodate a bolt forming part of a clamp adapted to clamp the joist to ano-ther supporting member.
Now it is well known to provide the free ends of the upper and lower horizontal flanges of structural beams and trusses with short stub ox strengthening flanges extending normal to said horizontal flanges. However, due to their sharp edges, these stub flanges have tended to become damaged with the rough usage encountered on building sites, and moreover have not lent themselves to easy connection of one joist to a supporting member (short of employing the type of clamp just described) which utilizes the slot and accommodated bolt.
Accordingly, it is the object of the invention to provide a structural member having the type of inverted "top-hat"
section or U-shaped channel adapted detachably to receive lumber inserts and to profile the free ends of the upper and lower I flanges so that their stub flanges inhibit damage more than known types while permitting relatively easy and quick connection to other supporting members as required.
According to the present invention therefore, a structural member is provided for the support o poured concrete, said member consisting of an extruded, elongated channel member ;presenting an upper chord, a lower chord, and chord connecting means intermediate said chords, said upper chord defining a channel substantially U-shaped in cross-section adapted to permit the introduction of a removable insert therein, said channel having a pair of opposed side walls connected to a bottom wall, :- . : : : : .
, . . ; :.
'~ SZg the free end of each said side wall terminating in an outwardly extending flange normal thereto; said chord connecting means comprising a central web extending between said upper and lower chords; said lower chord being defined by a pair of flanges parallel with, and spaced from, the first-mentioned flanges; the free end of each said flange terminating in a stub flange profiled by a pair of spaced surfaces, portions of which at least extend substantially normal to the longitudinal axis of said web and which terminate in a pair of converging surfaces so as to present each said stub flange with a cross-section which is substantially conical in cross-section.
The invention is illustrated, by way of example, in the accompanying drawings in which:
Figure 1 is an end view of one type of structural member showing the wooden insert in situ; and Figure 2 to 4 are end views of alternative forms of structural members.
Referring to the drawings, and in particular to Figure 1, the structural member shown therein (and which can be employed as either a beam or joist) consists of an elongated channel member presenting an upper chord, indicated generally at A, a lower chord indicated generally at B and chord connecting means or web (indicated generally at C) intermediate said chords A and B.
The upper chord defines a channel indicated generally at D which is substantially U-shaped in cross-section and which is formed by a pair of opposed side walls 1 connected by a bottom wall 2. The upper end of each side wall terminates in an outwardly extending flange ~ extending normal thereto.
- - . .
~::a3(~S29 The lower chord B is defined by a pair o~ lower flanges parallel with, but spaced from, the flanges 3.
The structural member includes a slot 5 of substantially T-shaped cross-section located in the general area of the junction of the web C and the lower chord B and which slot is adapted slidably to receive a bolt-head 6 of a slidable clamp (not shown) which does not fo.rm any part of this invention but which can, in known manner, clamp a joist to another and adjacent structural member.
The free end of each flange 3,4 terminates in a stub flange profiled by a pair of spaced surfaces 7,8 portions of which at least extend substantially normal to the longitudinal axis of the web C and which surfaces terminate in a pair of converging surfaces 9,10 so as to present each stub flange with a substantially conical cross-section.
An insert 11 (which can be of wood) is forced into channel D and detachably secured therein by any suitable means such as nails. Plywood panels or dimensioned lumber are then laid on the inserts and nailed thereto so as to support the poured concrete.
In the form of invention shown in Figure 2, it will be seen that the surfaces 7 of the stub flanges are much sharper ; than those shown in the arrangement of Figure 1. In other words, they are much closer to extending at 90 to their associated flanges 3 and 4. Other than that small difference, the second alternative form of the invention is the same as that described above and illustrated in Figure 1.
In the arrangement shown in Figure 3, the structural 4 - ~
~.~.3~)S2~
member omits the T-shaped slo-t 5 but the thlckness of the web C
increases, at 12, towards the lower chord B in the general area of the junction of the web and said lower chord.
The arrangement shown in Figure 4 is similar to that in Figure 3 except that the stub flanges are of the type shown in Figure 2.
In all cases, the structural members are of extruded aluminum and the angle between the converging surfaces 9 and 10 is within the range of 80 to 100 and preferably 90.
From the above description, i-t will be appreciated that the particular shape of the stub flanges are such that they will resist damage caused by rough handling or abuse and permit the fastening of two iden-tically flanged members to each other by means of a suitable and complementary friction clamp such as that described and claimed in copending Application Serial No.
368,630 filed January 15th, 1981- The said flanges also provide gripping surfaces for positive connection and a ready means for the self-centering action of the complementary friction ~clamp, as well as being completely visible for safety inspections.
. . ~
This invention relates to a structural member such as a beam or joist for use in concrete forming structures for the purpose of supporting poured concrete in walls, columns and slabs employed in the building industry~ One such joist or beam forms the subject of our Canadian Patent No. 941,123 which issued on February 5th, 1975 and which includes a cold-rolled substantially U-shaped channel or top chord which has elastically deformable side walls capable of being sprung outwardly to admit a wooden nailable insert into the channel;a lower chord spaced from the top chord by primary and secondary chord connecting means; and a pair of slotted nailer-plates each located at an opposite end of the joist. This structural member, although admirable for its purpose proved to be heavy and somewhat costly to manufacture.
A still further known type of beam or joist is manufactured from extruded aluminum. This type of joist also has a U-shaped channel or upper chord into which a wooden joist member or insert is forced with the inner surfaces of said channel being provided with serrations to inhibit movement of the insert upwa`rdly in a vertical plane, and, hence, to separate from the channel member. However, this type of structural member suffered from the disadvantage that it was difficult to remove damaged wooden inserts from the channel.
In consequence a further type of extruded aluminum joist was evolved and this type forms the subject of our Canadian Patent No. 1,045,34~ which issued on October 2nd, 1979 and which included a U-shaped channel to contain a wooden insert with ~he inner walls of the channel diverging away from one another towards the bottom of the channel thus making it easier to remove said } ~ ~ , . .
'. ' ' : . ` .',. . .:. , ~05;~9 insert.
soth of the last mentioned structural members included a slot in the lower chord to accommodate a bolt forming part of a clamp adapted to clamp the joist to ano-ther supporting member.
Now it is well known to provide the free ends of the upper and lower horizontal flanges of structural beams and trusses with short stub ox strengthening flanges extending normal to said horizontal flanges. However, due to their sharp edges, these stub flanges have tended to become damaged with the rough usage encountered on building sites, and moreover have not lent themselves to easy connection of one joist to a supporting member (short of employing the type of clamp just described) which utilizes the slot and accommodated bolt.
Accordingly, it is the object of the invention to provide a structural member having the type of inverted "top-hat"
section or U-shaped channel adapted detachably to receive lumber inserts and to profile the free ends of the upper and lower I flanges so that their stub flanges inhibit damage more than known types while permitting relatively easy and quick connection to other supporting members as required.
According to the present invention therefore, a structural member is provided for the support o poured concrete, said member consisting of an extruded, elongated channel member ;presenting an upper chord, a lower chord, and chord connecting means intermediate said chords, said upper chord defining a channel substantially U-shaped in cross-section adapted to permit the introduction of a removable insert therein, said channel having a pair of opposed side walls connected to a bottom wall, :- . : : : : .
, . . ; :.
'~ SZg the free end of each said side wall terminating in an outwardly extending flange normal thereto; said chord connecting means comprising a central web extending between said upper and lower chords; said lower chord being defined by a pair of flanges parallel with, and spaced from, the first-mentioned flanges; the free end of each said flange terminating in a stub flange profiled by a pair of spaced surfaces, portions of which at least extend substantially normal to the longitudinal axis of said web and which terminate in a pair of converging surfaces so as to present each said stub flange with a cross-section which is substantially conical in cross-section.
The invention is illustrated, by way of example, in the accompanying drawings in which:
Figure 1 is an end view of one type of structural member showing the wooden insert in situ; and Figure 2 to 4 are end views of alternative forms of structural members.
Referring to the drawings, and in particular to Figure 1, the structural member shown therein (and which can be employed as either a beam or joist) consists of an elongated channel member presenting an upper chord, indicated generally at A, a lower chord indicated generally at B and chord connecting means or web (indicated generally at C) intermediate said chords A and B.
The upper chord defines a channel indicated generally at D which is substantially U-shaped in cross-section and which is formed by a pair of opposed side walls 1 connected by a bottom wall 2. The upper end of each side wall terminates in an outwardly extending flange ~ extending normal thereto.
- - . .
~::a3(~S29 The lower chord B is defined by a pair o~ lower flanges parallel with, but spaced from, the flanges 3.
The structural member includes a slot 5 of substantially T-shaped cross-section located in the general area of the junction of the web C and the lower chord B and which slot is adapted slidably to receive a bolt-head 6 of a slidable clamp (not shown) which does not fo.rm any part of this invention but which can, in known manner, clamp a joist to another and adjacent structural member.
The free end of each flange 3,4 terminates in a stub flange profiled by a pair of spaced surfaces 7,8 portions of which at least extend substantially normal to the longitudinal axis of the web C and which surfaces terminate in a pair of converging surfaces 9,10 so as to present each stub flange with a substantially conical cross-section.
An insert 11 (which can be of wood) is forced into channel D and detachably secured therein by any suitable means such as nails. Plywood panels or dimensioned lumber are then laid on the inserts and nailed thereto so as to support the poured concrete.
In the form of invention shown in Figure 2, it will be seen that the surfaces 7 of the stub flanges are much sharper ; than those shown in the arrangement of Figure 1. In other words, they are much closer to extending at 90 to their associated flanges 3 and 4. Other than that small difference, the second alternative form of the invention is the same as that described above and illustrated in Figure 1.
In the arrangement shown in Figure 3, the structural 4 - ~
~.~.3~)S2~
member omits the T-shaped slo-t 5 but the thlckness of the web C
increases, at 12, towards the lower chord B in the general area of the junction of the web and said lower chord.
The arrangement shown in Figure 4 is similar to that in Figure 3 except that the stub flanges are of the type shown in Figure 2.
In all cases, the structural members are of extruded aluminum and the angle between the converging surfaces 9 and 10 is within the range of 80 to 100 and preferably 90.
From the above description, i-t will be appreciated that the particular shape of the stub flanges are such that they will resist damage caused by rough handling or abuse and permit the fastening of two iden-tically flanged members to each other by means of a suitable and complementary friction clamp such as that described and claimed in copending Application Serial No.
368,630 filed January 15th, 1981- The said flanges also provide gripping surfaces for positive connection and a ready means for the self-centering action of the complementary friction ~clamp, as well as being completely visible for safety inspections.
. . ~
Claims (6)
1. A structural member for supporting poured concrete, said member consisting of an extruded, elongated channel member presenting an upper chord, a lower chord, and chord connecting means intermediate said chords, said upper chord defining a channel substantially U-shaped in cross-section adapted to permit the introduction of a removable insert therein, said channel having a pair of opposed side walls connected by a bottom wall, the free end of each said side wall terminating in an outwardly extending flange normal thereto; said chord connecting means comprising a central web extending between said upper and lower chords; said lower chord being defined by a pair of flanges parallel with, and spaced from, the first-mentioned flanges; the free end of each said flange terminating in a stub flange profiled by a pair of spaced surfaces, portions of which at least extend substantially normal to the longitudinal axis of said web and which terminate in a pair of converging surfaces so as to present each said stub flange with a cross-section which is substantially conical in cross-section.
2. A member according to Claim 1 including a slot of substantially T-shaped cross-section located in the general area of the junction of the web and the lower chord, said slot being adapted slidably to receive the head of a bolt associated with a slidable clamp.
3. A member according to Claim 1 wherein the thickness of said web increases towards the lower chord in the general area of the junction of the web with said lower chord.
4. A member according to Claim 3 wherein the angle between the said pair of converging surfaces is within the range of 80° to 100°.
5. A member according to Claim 4 wherein said angle is 90°.
6. A member according to Claims 1, 2 or 3 formed from extruded aluminum.
Priority Applications (15)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA368,473A CA1130529A (en) | 1981-01-14 | 1981-01-14 | Structural member |
| GB8136835A GB2090900B (en) | 1981-01-13 | 1981-12-07 | Wall formwork |
| NL8105525A NL8105525A (en) | 1980-12-08 | 1981-12-08 | METHOD AND APPARATUS FOR PROPELLING PROFESSIONAL WORK USED IN STARTING CONCRETE FLOORS |
| FR8122914A FR2495674A1 (en) | 1980-12-08 | 1981-12-08 | Formwork used during concrete floor pouring - includes screw jacks disposed below vertical load bearing members of two spaced and braced modular truss sections |
| DE19813150640 DE3150640A1 (en) | 1981-01-13 | 1981-12-21 | MOLD FOR THE CONCRETE WALKING |
| GB8200071A GB2090901B (en) | 1981-01-14 | 1982-01-04 | Floor formwork |
| ZA8282A ZA8282B (en) | 1981-01-14 | 1982-01-07 | Truss shoring system and apparatus therefor |
| AU79426/82A AU7942682A (en) | 1981-01-13 | 1982-01-11 | Wall form and method of assembly thereof |
| AU79427/82A AU533910B2 (en) | 1981-01-14 | 1982-01-11 | Truss shoring system and apparatus therefor |
| BR8200147A BR8200147A (en) | 1981-01-13 | 1982-01-12 | FORM USED IN THE LAUNCH OF CONCRETE WALLS AND THE PROCESS OF ITS ASSEMBLY |
| BR8200148A BR8200148A (en) | 1981-01-14 | 1982-01-12 | APPLIANCE USED IN THE LAUNCH OF CONCRETE FLOORS AND THE PROCESS OF ASSEMBLING A STRUCTURAL UNIT |
| NL8200096A NL8200096A (en) | 1981-01-13 | 1982-01-12 | FORMWORK FOR POURING CONCRETE WALLS AND METHOD FOR ESTABLISHING THAT FORMWORK. |
| FR8200414A FR2497862A1 (en) | 1981-01-13 | 1982-01-13 | FORMWORK FOR THE CASTING OF CONCRETE WALLS AND METHOD OF ASSEMBLY |
| JP532582A JPS57151749A (en) | 1981-01-14 | 1982-01-14 | Truss assembling method and apparatus |
| DE19823200939 DE3200939A1 (en) | 1981-01-14 | 1982-01-14 | CEILING TABLES FOR THE CASTING OF CONCRETE CEILINGS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA368,473A CA1130529A (en) | 1981-01-14 | 1981-01-14 | Structural member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1130529A true CA1130529A (en) | 1982-08-31 |
Family
ID=4118912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA368,473A Expired CA1130529A (en) | 1980-12-08 | 1981-01-14 | Structural member |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1130529A (en) |
| ZA (1) | ZA8282B (en) |
-
1981
- 1981-01-14 CA CA368,473A patent/CA1130529A/en not_active Expired
-
1982
- 1982-01-07 ZA ZA8282A patent/ZA8282B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ZA8282B (en) | 1982-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |