GB630591A - Improvements relating to the manufacture of hollow structures of cementitious material - Google Patents
Improvements relating to the manufacture of hollow structures of cementitious materialInfo
- Publication number
- GB630591A GB630591A GB18803/47A GB1880347A GB630591A GB 630591 A GB630591 A GB 630591A GB 18803/47 A GB18803/47 A GB 18803/47A GB 1880347 A GB1880347 A GB 1880347A GB 630591 A GB630591 A GB 630591A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wire
- wires
- loops
- concrete
- embed
- 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
- 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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- 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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G2021/127—Circular prestressing of, e.g. columns, tanks, domes
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
630,591. Reinforced concrete. MACERATA, S. July 15, 1947, No. 18803. Convention date, Aug. 12, 1946. [Class 20(iv)] A method of constructing hollow prestressed concrete structures such as tanks, chimneys &c. comprises arranging a reinforcing wire to form, in plan, a polygonal figure, the direction of the wire being reversed at each corner thereof to form a loop projecting beyond the cross-section of the intended hollow structure, tensioning the wire at its free ends and possibly at one or more of said loops, casting or moulding the concrete to embed the straight sides of the figure, allowing the structure to harden and cutting off the projecting loops. Generally the wire will form one or more polygonal section spirals extending the whole or part of the height of the structure. A hollow structure as in Fig. 1 is constructed by erecting temporary scaffolding 16 at the corners of the intended struc-. ture and looping wires 2, 3 around sheaves 10 attached thereto, the free ends of the wires being secured to a stationary sheave 12 and a movable sheave 13. The wire is tensioned by a hydraulic jack 15 which forces sheaves 12 and 13 apart. Shuttering is then erected and concrete sprayed or cast to embed the straight parts of the wires within the walls 4. After hardening the loops 17 are cut off leaving the shell of the completed structure under compression. In forming cylindrical structures (Fig. 2 not shown) the wires lie tangentially within the walls.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA630591X | 1946-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB630591A true GB630591A (en) | 1949-10-17 |
Family
ID=25560793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18803/47A Expired GB630591A (en) | 1946-08-12 | 1947-07-15 | Improvements relating to the manufacture of hollow structures of cementitious material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB630591A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3237358A (en) * | 1961-06-26 | 1966-03-01 | Mcalpine & Sons Ltd Sir Robert | High-pressure storage vessel constructed of pre-stressed concrete |
-
1947
- 1947-07-15 GB GB18803/47A patent/GB630591A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3237358A (en) * | 1961-06-26 | 1966-03-01 | Mcalpine & Sons Ltd Sir Robert | High-pressure storage vessel constructed of pre-stressed concrete |
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