Arch forming assembly

Details Arch forming assembly Arch forming assembly

E - Fixed Constructions

04

B

72/107, 20/15

E04B 1/343 (2006.01) E04B 1/32 (2006.01) E04B 7/08 (2006.01) E04G 11/48 (2006.01) E04G 21/18 (2006.01) E04B 1/35 (2006.01)

Patent

CA 1102083

ABSTRACT OF THE DISCLOSURE A collapsible arch forming assembly comprising a flexible member and two tension line lengths with one tension line length threaded through even number guides, counted from one end of the flexible member and the other tension line length threaded through the odd number guides. Tensioning the tension line lengths arches the flexible member into the arch and this may be done by a winch assembly or inserting spreader bars at the guides to deflect the free one of the first and se- cond tension line lengths at that position. The spreader bars may be replaced by, for example, mechanical jacks or fluid pressure actuated jacks particularly for such applica- tions as using the arch forming assembly as formwork upon which concrete is poured.

301939

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