| 摘要 |
A slab formwork system for casting ceilings has panel support beams underlyi ng and supporting formwork panels; and shores supporting the panel support beams. T he panel support beams have upwardly facing top surfaces with upwardly open, longitudinally extending recesses and resiliently deformable strips of elastomeric material extending along the recesses. The formwork panels having marginal edge undersurface portions mounted on the panel support surfaces and downwardly protruding panel retainer projections embedded in the resiliently deformable strips. The formwork panels each have a pair o f parallel, elongate intermediate members extending between and interconnecting parallel elongate side members and a sheet of material supported on the side and intermediate members, and the side members have undersides formed with a longitudinally extending, downwardly open recesses. Connecting clips retained in the downwardly open recesses are engaged with the support beams to secure the formwork panels to the support beams. The panel support beams are telescopically longitudinally adjustable to allow corresponding variation of the spacings of the shores which have dropheads each having a first component forming a prophead extending between an adjacent pair of the formwork panels and a second componentin supporting engagement with the formwork panels. The first and second components have mutually engaged screw threads allowing the second component to be lowered relative to the first component for releasing the formwork panels.</ SDOAB>
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