GB629234A - Improvements in or relating to slab structure - Google Patents
Improvements in or relating to slab structureInfo
- Publication number
- GB629234A GB629234A GB25708/45A GB2570845A GB629234A GB 629234 A GB629234 A GB 629234A GB 25708/45 A GB25708/45 A GB 25708/45A GB 2570845 A GB2570845 A GB 2570845A GB 629234 A GB629234 A GB 629234A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bars
- panel
- tiles
- tensioned
- roofs
- 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
- 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
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/22—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members built-up by elements jointed in line
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
- Finishing Walls (AREA)
Abstract
629,234. Slab floors and roofs. MOLLENDORF, J. D., and SCHMIDT, K. C. Oct. 3, 1945, No. 25708. Convention date, June 28, 1944. [Class 20(iv)] Slab floors and roofs are formed by placing panel units alongside one another, each panel unit comprising a number of precast hollow concrete tiles 26, Fig. 2, assembled with their end faces abutting. Each tile has a longitudinal groove 32 along each side adjacent the base for the reception of reinforcing bars 40 which are tensioned to such a degree that the tiles remain under compression below the central axis of the panel under both dead and live loads. Tendency towards buckling of the unstressed side of the panes is neutralised by providing additional longitudinal grooves 34 along each side adjacent the upper surface for the reception of further bars 48 which are tensioned to a less extent than the bars 40. The compression stress applied to each panel unit is approximately equal to 24 x 10<SP>3</SP> lbs. per sq. inch minus Mc/I X Es/Ec where M=bending movement, c = distance in inches from bars to neutral axis of panel, I=moment of inertia, Es, Ec=modulus of elasticity of the steel bars and concrete respectively. A second form of tile, Fig. 8, has no upper longitudinal grooves but buckling is prevented by a single tensioned rod 66 positioned immediately above the upper surface of the tiles.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US629234XA | 1944-06-28 | 1944-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB629234A true GB629234A (en) | 1949-09-15 |
Family
ID=22045738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25708/45A Expired GB629234A (en) | 1944-06-28 | 1945-10-03 | Improvements in or relating to slab structure |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB629234A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3481091A (en) * | 1968-03-04 | 1969-12-02 | Hueco Sa | Floor beam construction utilizing post-stressed beams formed of an assembly of hollow elements |
-
1945
- 1945-10-03 GB GB25708/45A patent/GB629234A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3481091A (en) * | 1968-03-04 | 1969-12-02 | Hueco Sa | Floor beam construction utilizing post-stressed beams formed of an assembly of hollow elements |
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