CA1154978A - Composite steel and concrete floor structure - Google Patents
Composite steel and concrete floor structureInfo
- Publication number
- CA1154978A CA1154978A CA000373124A CA373124A CA1154978A CA 1154978 A CA1154978 A CA 1154978A CA 000373124 A CA000373124 A CA 000373124A CA 373124 A CA373124 A CA 373124A CA 1154978 A CA1154978 A CA 1154978A
- Authority
- CA
- Canada
- Prior art keywords
- extension
- spanner bar
- main body
- slot
- spanner
- 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
Classifications
-
- 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
- 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
- E04B5/17—Floor structures partly formed in situ
- E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
- E04B5/29—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated the prefabricated parts of the beams consisting wholly of metal
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Floor Finish (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
ABSTRACT
A composite steel and concrete floor structure including rows of steel joists, each joist having a Z or S-shaped upper chord, spanner bars extending between the joists, a corrugated metal sheet over the spanner bars and between the joists, reinforcing over the upper chords, and concrete embedding the upper chords and the reinforcing, and resting upon the corrugated sheet.
A composite steel and concrete floor structure including rows of steel joists, each joist having a Z or S-shaped upper chord, spanner bars extending between the joists, a corrugated metal sheet over the spanner bars and between the joists, reinforcing over the upper chords, and concrete embedding the upper chords and the reinforcing, and resting upon the corrugated sheet.
Description
~s~
This invention relates to an improved composite steel and concrete floor structure utilizing an improved spanner bar.
BACKGROUND OF THE INVENTION
A composite steel and concrete ~loor structure is shown in United States Patent No. 3,845,594 issued on November 5, 1974 to Ernest O. ~utts et al. and entitled Steel Joist or Composite Steel and Concrete Construction.
In this previous paten-t there is disclosed a composite steel concrete floor structure using steel joists which are spacecl in parallel xows and held in position by transverse spanner bars upon which plywood formwork is supported. rrhe upper ends of the steel joists have a ziy-zag form which is embedded in the concrete poured upon the forms. After the concrete has set, the spanner bars are rotated along their axes and slipped out of the joists and the formwork can then be removed.
SUMMARY OF THE IN~'ENTION
In order to speed up the construction and remove the necessity for form work, it is now being proposed with this invention to use a spanner bar which supports a corrugated steel sheet. The concrete is poured onto the metal sheet which functions as a form. The structure is therefore complete after the concrete has set and there is no disassembly of formwork required.
The spanner bar can be lef-t in place or can be removed as desired.
m e spanner bar used is made from a deep channel or U-shaped steel member having extensions of less depth at each end and slots in each extension for accommodating and positioning the joists and stabilizing them both laterally and torsionally. Such a construction provides a relatively inexpensive spanner bar which can be used more than once without being damaged and yet is of a low enough cost to be left in place in a completed structure.
m e invention will now be described with reference to the attached drawings which show preferred embodiments of the structure.
~5~78 BRIEF DESCRIPTION OF TIIE DRAWINGS
_ Figure 1 is a diagrammatic view of a cross section of a composite steel and concrete floor structure of this invent:ion.
Figure 2 is a perspective view of one type of spanner bar which can be used with -this invention.
Figure 3 is a perspective view o~ one end oE another type of spanner bar which can be used with this invention.
Figure ~ is a perspective view of one end of the type of steel joist shown at the right hand side of Figure l; and Figure 5 is a perspective view of one end of the type of steel joist shown at the left hand side of Figure 1.
DETAILED DESCRIPTION OF PREFER~ED EMBODIMENTS
Referring to the drawings steel joists l and 3 are placed between beams or walls (not shown) of a conventional building and spaced apart and held in that position by spannar bars 5 which are secured in the manner shown in U.S. Patent No. 3,845,594 through apertures in the joists. Typical joists are shown in Figures ~ and 5, and for the purposes of illustration only joist l is of the type shown in Figure 5 and joist 3 is oE the type shown in Figure 4. The apertures 7 are shown in Figures 4 and 5 and are preferably of the shape shown. Although they could be of any suitable shape to permit the insertion of a spanner bar and rotation of the same when its slot is aligned with the aperature. Above the spanner bars 5, a sheet metal (preferably steel~ corrugated plate 9 rests and is used as the form for supporting concrete ll. Suitable steel reinforcing 13 is used in the concrete. The corrugated sheet 9 is shown as having smooth undulations, however it could be formed of square cut undulations, the purpose of the undulations merely being to provide longitudinal strength to the plate so that it will be self-supporting and will support the weight of concrete over the span between ,.
~S~9~
adjacent spanner bars.
The spanner bar which is shown specifically in Figure 2 consists of a substantially U-shaped steel member havincJ A back 15, two webs 17 and two flanges 19. ~ short extension 21 extends from one end oE the spanner bar and has a slot 23 in each web. ~ longer extension 25 extends from the other end of the spanner bar ancl has a slot 27 situated in the central reg:ion of extension 25 and in each web. The distance between -the slots 23 and 2-/ is the same as the length of the spanner bar which is of full depth plus the length of the short extension 21. During assembly of this spanner bar between joists, the spanner bar can therefore be oriented on its side, the extension 25 can be inserted through an aperature in one joist for the maximum distance so that the spanner bar can then be lifted between the joists and extension 21 can be placed in-to a corresponding aperture in the next joist. The spanner bar can then be moved longitudinally the full distance permitted by the length of extension 21 and oriented through 90 as slots 23 and 27 will then be aligned with the plane of each joist. The spanner bar will then be locked in place and position the joists a set distance from each other. The fact that the slot 23 is aligned with one edge of the full depth of the spanner bar ensures that extra support is provided for the joists by the spanner bar web so that they are not liable to roll over during installation.
In Figure 3 there is shown a further type of spanner bar end which can be used on both ends of a spanner bar. This spanner bar differs from that shown in Figure 2 by having a slot 29 positioned in the mid region of extension 31, an inclined edge 33 from the slot and a slightly deeper part 35 extending to the full depth of the spanner bar. This structure provides a means of easier location of the spanner bar as the inclined edge 33 guides the bar as it is turned in an aperture in a joist. The sides of the slot 29 also provide support to prevent rolling of -the joist, this support normally being 7~
adequate especially for a joist having a balanced cross section.
It is a]so conceivable that other shapes of spanner bar could be used such as one having a main body as illustrated in Figllres 2 and 3 and solid bar extensions welded to each end, the extensions being of the type shown in United States Patent No. 3,845,594.
It is also conceivable that a variation of slot may be used with the spanner bars. For instance, the slot can be arranged so that it is a fraction of its leng-th in the position shown in the drawings and the remalnder of its length can extend from the top face of -the spanner bar. Such a spanner bar would rest at a higher position relative to a joist than the spanner bars shown.
It is thus seen that a simple and effective composite structure is formed by following the teachings of this invention, and as no forms are required there are less man hours used in building up such a composi-te structure and extremely little skilled labor is required. There is therefore an overall reduction in time and labour achieved in forming this composite structure over the known structure as for instance disclosed in United States Patent No. 3,854,594 previously referred to. The disclosed spanner bar is also of less expensive construction to that shown in the aforementioned patent and yet is durable enough to be used more than once if required.
This invention relates to an improved composite steel and concrete floor structure utilizing an improved spanner bar.
BACKGROUND OF THE INVENTION
A composite steel and concrete ~loor structure is shown in United States Patent No. 3,845,594 issued on November 5, 1974 to Ernest O. ~utts et al. and entitled Steel Joist or Composite Steel and Concrete Construction.
In this previous paten-t there is disclosed a composite steel concrete floor structure using steel joists which are spacecl in parallel xows and held in position by transverse spanner bars upon which plywood formwork is supported. rrhe upper ends of the steel joists have a ziy-zag form which is embedded in the concrete poured upon the forms. After the concrete has set, the spanner bars are rotated along their axes and slipped out of the joists and the formwork can then be removed.
SUMMARY OF THE IN~'ENTION
In order to speed up the construction and remove the necessity for form work, it is now being proposed with this invention to use a spanner bar which supports a corrugated steel sheet. The concrete is poured onto the metal sheet which functions as a form. The structure is therefore complete after the concrete has set and there is no disassembly of formwork required.
The spanner bar can be lef-t in place or can be removed as desired.
m e spanner bar used is made from a deep channel or U-shaped steel member having extensions of less depth at each end and slots in each extension for accommodating and positioning the joists and stabilizing them both laterally and torsionally. Such a construction provides a relatively inexpensive spanner bar which can be used more than once without being damaged and yet is of a low enough cost to be left in place in a completed structure.
m e invention will now be described with reference to the attached drawings which show preferred embodiments of the structure.
~5~78 BRIEF DESCRIPTION OF TIIE DRAWINGS
_ Figure 1 is a diagrammatic view of a cross section of a composite steel and concrete floor structure of this invent:ion.
Figure 2 is a perspective view of one type of spanner bar which can be used with -this invention.
Figure 3 is a perspective view o~ one end oE another type of spanner bar which can be used with this invention.
Figure ~ is a perspective view of one end of the type of steel joist shown at the right hand side of Figure l; and Figure 5 is a perspective view of one end of the type of steel joist shown at the left hand side of Figure 1.
DETAILED DESCRIPTION OF PREFER~ED EMBODIMENTS
Referring to the drawings steel joists l and 3 are placed between beams or walls (not shown) of a conventional building and spaced apart and held in that position by spannar bars 5 which are secured in the manner shown in U.S. Patent No. 3,845,594 through apertures in the joists. Typical joists are shown in Figures ~ and 5, and for the purposes of illustration only joist l is of the type shown in Figure 5 and joist 3 is oE the type shown in Figure 4. The apertures 7 are shown in Figures 4 and 5 and are preferably of the shape shown. Although they could be of any suitable shape to permit the insertion of a spanner bar and rotation of the same when its slot is aligned with the aperature. Above the spanner bars 5, a sheet metal (preferably steel~ corrugated plate 9 rests and is used as the form for supporting concrete ll. Suitable steel reinforcing 13 is used in the concrete. The corrugated sheet 9 is shown as having smooth undulations, however it could be formed of square cut undulations, the purpose of the undulations merely being to provide longitudinal strength to the plate so that it will be self-supporting and will support the weight of concrete over the span between ,.
~S~9~
adjacent spanner bars.
The spanner bar which is shown specifically in Figure 2 consists of a substantially U-shaped steel member havincJ A back 15, two webs 17 and two flanges 19. ~ short extension 21 extends from one end oE the spanner bar and has a slot 23 in each web. ~ longer extension 25 extends from the other end of the spanner bar ancl has a slot 27 situated in the central reg:ion of extension 25 and in each web. The distance between -the slots 23 and 2-/ is the same as the length of the spanner bar which is of full depth plus the length of the short extension 21. During assembly of this spanner bar between joists, the spanner bar can therefore be oriented on its side, the extension 25 can be inserted through an aperature in one joist for the maximum distance so that the spanner bar can then be lifted between the joists and extension 21 can be placed in-to a corresponding aperture in the next joist. The spanner bar can then be moved longitudinally the full distance permitted by the length of extension 21 and oriented through 90 as slots 23 and 27 will then be aligned with the plane of each joist. The spanner bar will then be locked in place and position the joists a set distance from each other. The fact that the slot 23 is aligned with one edge of the full depth of the spanner bar ensures that extra support is provided for the joists by the spanner bar web so that they are not liable to roll over during installation.
In Figure 3 there is shown a further type of spanner bar end which can be used on both ends of a spanner bar. This spanner bar differs from that shown in Figure 2 by having a slot 29 positioned in the mid region of extension 31, an inclined edge 33 from the slot and a slightly deeper part 35 extending to the full depth of the spanner bar. This structure provides a means of easier location of the spanner bar as the inclined edge 33 guides the bar as it is turned in an aperture in a joist. The sides of the slot 29 also provide support to prevent rolling of -the joist, this support normally being 7~
adequate especially for a joist having a balanced cross section.
It is a]so conceivable that other shapes of spanner bar could be used such as one having a main body as illustrated in Figllres 2 and 3 and solid bar extensions welded to each end, the extensions being of the type shown in United States Patent No. 3,845,594.
It is also conceivable that a variation of slot may be used with the spanner bars. For instance, the slot can be arranged so that it is a fraction of its leng-th in the position shown in the drawings and the remalnder of its length can extend from the top face of -the spanner bar. Such a spanner bar would rest at a higher position relative to a joist than the spanner bars shown.
It is thus seen that a simple and effective composite structure is formed by following the teachings of this invention, and as no forms are required there are less man hours used in building up such a composi-te structure and extremely little skilled labor is required. There is therefore an overall reduction in time and labour achieved in forming this composite structure over the known structure as for instance disclosed in United States Patent No. 3,854,594 previously referred to. The disclosed spanner bar is also of less expensive construction to that shown in the aforementioned patent and yet is durable enough to be used more than once if required.
Claims (5)
IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A spanner bar consisting of a main body of a deep channel member having a back and a pair of webs, a flange extending outwardly from the end of each web, a first extension of less depth than the main body extending at one end of the main body and having a slot extending towards the back of the channel, and a second extension of less depth than the main body extending at the other end of the main body and having a slot extending towards the back of the channel.
2. The spanner bar of Claim 1, wherein each slot is in the mid-region of its respective extension.
3. The spanner bar of Claim 1, wherein an inclined edge extends from each slot towards the main body and away from the back of the channel.
4. The spanner bar of Claim 1, wherein the first extension is of shorter length than the second extension and the slot in the first extension is located at the edge of the main body.
5. The spanner bar of Claim 4, wherein the distance between the slots is equal to the length of the main body plus the length of the first extension.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000373124A CA1154978A (en) | 1981-03-16 | 1981-03-16 | Composite steel and concrete floor structure |
| FR8204327A FR2501752A1 (en) | 1981-03-16 | 1982-03-15 | MIXED STEEL-CONCRETE FLOOR STRUCTURE AND SPACER BAR |
| DE19823209335 DE3209335A1 (en) | 1981-03-16 | 1982-03-15 | Composite floor of steel and concrete and bracing beams |
| JP57041616A JPS57197352A (en) | 1981-03-16 | 1982-03-16 | Steel concrete composite floor structure |
| KR8201126A KR910000784B1 (en) | 1981-03-16 | 1982-03-16 | Composite steel and concrete floor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000373124A CA1154978A (en) | 1981-03-16 | 1981-03-16 | Composite steel and concrete floor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1154978A true CA1154978A (en) | 1983-10-11 |
Family
ID=4119463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000373124A Expired CA1154978A (en) | 1981-03-16 | 1981-03-16 | Composite steel and concrete floor structure |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS57197352A (en) |
| KR (1) | KR910000784B1 (en) |
| CA (1) | CA1154978A (en) |
| DE (1) | DE3209335A1 (en) |
| FR (1) | FR2501752A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1172463A (en) * | 1983-01-17 | 1984-08-14 | Felix Laurus | Double top chord |
| US4592184A (en) * | 1984-07-16 | 1986-06-03 | Joel I. Person | Composite floor system |
| US7871637B2 (en) | 1996-08-27 | 2011-01-18 | Baxter International Inc. | Dry hemostatic compositions and methods for their preparation |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1408817A (en) * | 1964-06-30 | 1965-08-20 | Locking device for a joist on a cornice | |
| US3340662A (en) * | 1965-05-17 | 1967-09-12 | Nat Gypsum Co | Suspended ceiling with cup type cap |
| US3845594A (en) * | 1968-11-04 | 1974-11-05 | Hambro Structural Systems Ltd | Steel joist or composite steel and concrete construction |
| DE6919993U (en) * | 1969-05-16 | 1969-11-13 | Richter Reinhold | PREFABRICATED MAIN SUPPORT WITH PREFABRICATED ADDITIONAL SUPPORTING SUPPORTS TO THE SUPPORT FOR CEILING PANELS IN A BASE CEILING |
| CH551170A (en) * | 1972-04-14 | 1974-07-15 | Straessle Marcel | FRAME. |
| CA1008691A (en) * | 1974-06-11 | 1977-04-19 | Felix F. Laurus | Sheet metal joist |
| JPS5428215A (en) * | 1977-08-04 | 1979-03-02 | Ardal Og Sunndal Verk | Pot shell for electrolytic bath |
-
1981
- 1981-03-16 CA CA000373124A patent/CA1154978A/en not_active Expired
-
1982
- 1982-03-15 DE DE19823209335 patent/DE3209335A1/en not_active Ceased
- 1982-03-15 FR FR8204327A patent/FR2501752A1/en not_active Withdrawn
- 1982-03-16 JP JP57041616A patent/JPS57197352A/en active Pending
- 1982-03-16 KR KR8201126A patent/KR910000784B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR910000784B1 (en) | 1991-02-08 |
| FR2501752A1 (en) | 1982-09-17 |
| KR830009331A (en) | 1983-12-19 |
| JPS57197352A (en) | 1982-12-03 |
| DE3209335A1 (en) | 1982-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3397497A (en) | Deck system | |
| US4432178A (en) | Composite steel and concrete floor construction | |
| US4336676A (en) | Composite structural panel with offset core | |
| CA1178819A (en) | Composite floor system | |
| US4715155A (en) | Keyable composite joist | |
| US5301486A (en) | Bracing system | |
| US5852908A (en) | Structural beam and web | |
| US4259822A (en) | Precast concrete joist system | |
| CA2412726A1 (en) | Structural member for use in the construction of buildings | |
| CA2252284C (en) | Lintel | |
| CA1154978A (en) | Composite steel and concrete floor structure | |
| US3686809A (en) | Reinforced wood floor sections | |
| AU2003229379B2 (en) | Reinforced structural steel decking | |
| CA1244215A (en) | Flange hanger | |
| US4702059A (en) | Joist system for forming concrete slabs | |
| US2022784A (en) | Concrete floor construction | |
| KR100202270B1 (en) | Deck plate for reforced concrete slab | |
| US4885892A (en) | Composite beams | |
| US6442910B1 (en) | Composite building system | |
| EP0032417A1 (en) | A construction device, especially for supporting shuttering | |
| EP0031167A2 (en) | Method and mold for constructing a concrete floor | |
| USRE31807E (en) | Truss-web connector | |
| EP0093224B1 (en) | Roof truss assembly | |
| JPH0350195Y2 (en) | ||
| AU706395B2 (en) | Structural beam and web |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |