CA2455071A1 - Segmented cold formed joist - Google Patents
Segmented cold formed joist Download PDFInfo
- Publication number
- CA2455071A1 CA2455071A1 CA 2455071 CA2455071A CA2455071A1 CA 2455071 A1 CA2455071 A1 CA 2455071A1 CA 2455071 CA2455071 CA 2455071 CA 2455071 A CA2455071 A CA 2455071A CA 2455071 A1 CA2455071 A1 CA 2455071A1
- Authority
- CA
- Canada
- Prior art keywords
- web
- chord
- joist
- members
- supporting surface
- 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.)
- Granted
Links
- 239000002131 composite material Substances 0.000 claims 8
- 239000002184 metal Substances 0.000 claims 7
- 238000000034 method Methods 0.000 claims 7
- 235000021538 Chard Nutrition 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
Classifications
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
- E04C3/065—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web with special adaptations for the passage of cables or conduits through the web
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/10—Load-carrying floor structures formed substantially of prefabricated units with metal beams or girders, e.g. with steel lattice girders
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
- E04B5/40—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element with metal form-slabs
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
- E04C3/07—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web at least partly of bent or otherwise deformed strip- or sheet-like material
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
- E04C3/083—Honeycomb girders; Girders with apertured solid web
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
- E04C3/09—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders at least partly of bent or otherwise deformed strip- or sheet-like material
-
- 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
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
- E04C3/294—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
-
- 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
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
- E04C2003/0452—H- or I-shaped
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Floor Finish (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
A joist comprised of at least one cold-formed elongated chord member; a cold-formed web having a plurality of web members and means for securing said web to said chord member.
Claims (39)
1. A joist comprised of:
(a) at least one cold-formed elongated chord member;
(b) a cold-formed web having a plurality of web members;
(c) means for securing said web to said chord member.
(a) at least one cold-formed elongated chord member;
(b) a cold-formed web having a plurality of web members;
(c) means for securing said web to said chord member.
2. A joist as claimed in Claim 1 comprising a first and second spaced cold-formed chord member with said web secured to said spaced first and second chord members.
3. A joist as claimed in Claim 2 wherein said securing means comprises fasteners.
4. A joist as claimed in Claim 3 wherein said web includes stiffening means.
5. A joist as claimed in Claim 4 wherein said web comprises a plurality of web members fastened together.
6. A joist as claimed in Claim 5 wherein said web members are segmented.
7. A joist as claimed in Claim 6 wherein one of said web members has a different thickness than the remaining web members.
8. A joist as claimed in Claim 7 wherein each said web segments includes said stiffening means and said stiffening means comprised a first stiffening means at each end of said web segments, and a second stiffening means disposed intermediate said ends of said web segments.
9. A joist as claimed in Claim 8 wherein said second stiffening means include holes adapted to receive bridging means.
10. A supporting surface comprising a plurality of joist, each said joist comprised of:
(a) spaced cold-formed upper and lower metal chord members;
(b) a web intermediate said upper and lower chord members;
(c) fasteners to fasten said web to said upper and lower chord members;
said upper chords disposed in a plane defining said supporting surface.
(a) spaced cold-formed upper and lower metal chord members;
(b) a web intermediate said upper and lower chord members;
(c) fasteners to fasten said web to said upper and lower chord members;
said upper chords disposed in a plane defining said supporting surface.
11. A supporting surface as claimed in Claim 10 wherein said web comprises a plurality of web segments, said segments fastened together by mechanical fastening means.
12. A supporting surface as claimed in Claim 11 wherein said web segments and upper and lower chord members are coated with a coating material.
13. A supporting surface as claimed in Claim 12 wherein at least one of said web segments includes an opening there through, and a stiffening recess for stiffening said web segment.
14. A supporting surface as claimed in Claim 13 wherein said stiffening means includes at least one hole adapted to receive a bridging member for bridging adjacent joist together.
15. A supporting surface as claimed in Claim 14 wherein one of said web segments has a different thickness than said other web segments.
16. A supporting surface as claimed in Claim 15 wherein said chord segments extend longitudinally along a length thereof and said web segments disposed adjacent said ends of said chord members have a greater thickness than said web segments disposed intermediate said ends.
17. A supporting surface as claimed in Claim 16 where at least one of said chord members has a length presenting a first portion with a first thickness and a second portion with a second thickness.
18. A supporting surface as claimed in Claim 17 wherein said upper and lower chord members each present a horizontal chord extension.
19. A supporting surface as claimed in Claim 18 wherein said horizontal chord extensions are disposed symmetrically about said web.
20. A supporting surface as claimed in Claim 19 wherein said upper chord member further includes a vertical extension.
21. A supporting surface as claimed in Claim 20 wherein said horizontal extensions of said upper chord are adapted to support a deck.
22. A supporting surface as claimed in Claim 21 wherein said deck includes composite concrete slab having said vertical said extensions of said upper chord disposed therein.
23. A supporting surface as claimed in Claim 22 wherein said vertical extension includes a spot clinch.
24. A composite floor system comprising:
(a) a plurality of metal joist, said joist comprising:
(i) an upper chord member formed from sheet metal to present a vertical chord extension and horizontal upper chord extensions symmetrically disposed about said vertical extension.
(ii) a lower chord member formed from sheet metal to present a horizontal lower chord extension.
(iii) a plurality of web segments fastened together to define a substantially vertically disposed web.
(iv) mechanical fasteners to fasten said web to said spaced upper and lower chords.
(v) a concrete slab disposed on said upper chord of said plurality of joist with said vertical extension of said upper chord embedded in said concrete slab to define said composite floor.
(a) a plurality of metal joist, said joist comprising:
(i) an upper chord member formed from sheet metal to present a vertical chord extension and horizontal upper chord extensions symmetrically disposed about said vertical extension.
(ii) a lower chord member formed from sheet metal to present a horizontal lower chord extension.
(iii) a plurality of web segments fastened together to define a substantially vertically disposed web.
(iv) mechanical fasteners to fasten said web to said spaced upper and lower chords.
(v) a concrete slab disposed on said upper chord of said plurality of joist with said vertical extension of said upper chord embedded in said concrete slab to define said composite floor.
25. A composite floor system as claimed in Claim 24 or in said upper and lower chord members and said web segments are painted.
26. A composite floor system as claimed in Claim 25 or in said mechanical fasteners comprised rivets.
27. A composite floor system as claimed in Claim 26 wherein one of said web segments has a thickness greater than said other web segments.
28. A composite floor system as claimed in Claim 27 wherein at least one of said chord members has a first portion with a first thickness and a second portion with a second thickness.
29. A composite floor system as claimed in Claim 28 wherein one of said extensions of said upper chard member includes a spot clinch.
30. A method of producing a joist comprising the steps of:
(a) forming upper and lower chords from sheet metal;
(b) forming at least one web member from sheet metal;
(c) fastening said web between said upper and lower chords with mechanical fasteners.
(a) forming upper and lower chords from sheet metal;
(b) forming at least one web member from sheet metal;
(c) fastening said web between said upper and lower chords with mechanical fasteners.
31. A method is claimed in Claim 30 wherein said web, and upper and lower chords are painted prior to said fastening step.
32. A method is claimed in Claim 31 wherein said web, and upper and lower chords are painted prior to said forming steps.
33. A method is claimed in Claim 32 wherein such sheet metal forming said web and upper and lower chords is stamped to produce holes adapted to receive said fasteners.
34. A method is claimed in Claim 33 including a step of forming a plurality of web members fastened together to define a web.
35. A method is claimed in Claim 34 wherein said web members are selected with different web thickness.
36. A method is claimed in Claim 35 wherein said chord members include reinforced sections to accommodate greater loads.
37. A joist as claimed in claim 6 wherein opposite ends of said upper chord are adapted to be load bearing.
38. A joist as claimed in claim 6 wherein opposite ends of said lower chord are adapted to be load bearing.
39. A joist comprised of:
(a) at least one cold formed elongated chord member;
(b) a cold formed web having a stiffening recess (c) means for securing said web to said chord member.
(a) at least one cold formed elongated chord member;
(b) a cold formed web having a stiffening recess (c) means for securing said web to said chord member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2455071A CA2455071C (en) | 2003-11-24 | 2003-11-24 | Segmented cold formed joist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2455071A CA2455071C (en) | 2003-11-24 | 2003-11-24 | Segmented cold formed joist |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2455071A1 true CA2455071A1 (en) | 2005-05-24 |
| CA2455071C CA2455071C (en) | 2011-11-15 |
Family
ID=34596899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2455071A Expired - Lifetime CA2455071C (en) | 2003-11-24 | 2003-11-24 | Segmented cold formed joist |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2455071C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006069435A1 (en) * | 2004-12-27 | 2006-07-06 | Gcg Holdings Ltd. | Floor system with steel joists having openings with edge formations and method |
| WO2011054094A1 (en) * | 2009-11-09 | 2011-05-12 | Best Joist Inc. | Unitary steel joist |
| US8381469B2 (en) | 2010-04-08 | 2013-02-26 | Dizenio, Inc. | Cold formed joist |
| GB2522039A (en) * | 2014-01-10 | 2015-07-15 | Dura Composites Ltd | I-beam |
| WO2016009072A1 (en) * | 2014-07-18 | 2016-01-21 | Bottin Hervé | Floor assembly for modular building units |
| CN113982185A (en) * | 2021-12-03 | 2022-01-28 | 扬州工业职业技术学院 | Parallel wood truss structure of dowel welding |
| US11459755B2 (en) | 2019-07-16 | 2022-10-04 | Invent To Build Inc. | Concrete fillable steel joist |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8407966B2 (en) | 2003-10-28 | 2013-04-02 | Ispan Systems Lp | Cold-formed steel joist |
| CA2652587C (en) | 2006-05-18 | 2014-12-02 | Paradigm Focus Product Development Inc. | Light steel trusses and truss systems |
| WO2010025569A1 (en) | 2008-09-08 | 2010-03-11 | Best Joist Inc. | Adjustable floor to wall connectors for use with bottom chord and web bearing joists |
| WO2011009204A1 (en) | 2009-07-22 | 2011-01-27 | Best Joist Inc. | Roll formed steel beam |
| US8943776B2 (en) | 2012-09-28 | 2015-02-03 | Ispan Systems Lp | Composite steel joist |
-
2003
- 2003-11-24 CA CA2455071A patent/CA2455071C/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006069435A1 (en) * | 2004-12-27 | 2006-07-06 | Gcg Holdings Ltd. | Floor system with steel joists having openings with edge formations and method |
| EA011532B1 (en) * | 2004-12-27 | 2009-04-28 | Гсг Холдингс Лтд. | Floor system with steel joists having openings with edge formations |
| WO2011054094A1 (en) * | 2009-11-09 | 2011-05-12 | Best Joist Inc. | Unitary steel joist |
| US8281540B2 (en) | 2009-11-09 | 2012-10-09 | Ispan Systems Lp | Unitary steel joist |
| US8381469B2 (en) | 2010-04-08 | 2013-02-26 | Dizenio, Inc. | Cold formed joist |
| GB2522039A (en) * | 2014-01-10 | 2015-07-15 | Dura Composites Ltd | I-beam |
| GB2522039B (en) * | 2014-01-10 | 2018-01-10 | Dura Composites Ltd | I-beam |
| WO2016009072A1 (en) * | 2014-07-18 | 2016-01-21 | Bottin Hervé | Floor assembly for modular building units |
| US9556612B2 (en) | 2014-07-18 | 2017-01-31 | Williams Scotsman, Inc. | Floor assembly for modular building units |
| US11459755B2 (en) | 2019-07-16 | 2022-10-04 | Invent To Build Inc. | Concrete fillable steel joist |
| CN113982185A (en) * | 2021-12-03 | 2022-01-28 | 扬州工业职业技术学院 | Parallel wood truss structure of dowel welding |
| CN113982185B (en) * | 2021-12-03 | 2022-11-29 | 扬州工业职业技术学院 | Parallel wood truss structure of dowel welding |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2455071C (en) | 2011-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20231124 |