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摘要

PROBLEM TO BE SOLVED: To provide a great span slab frame and a slab used for the frame and a construction method for the frame, applicable for a permanent building made of concrete usable for hundreds of years.;SOLUTION: The great span slab frame 1 comprises a plurality of columns 2 to be constructed and a slab delivered between column-to-column PCa beams 3, the slab having latticed slab reinforcing bars 6 arranged in ribs formed on the lower face and PCs introduced into lower chord materials for the slab reinforcing bars. The slab is constructed by site-placing concrete after arranging a slab form, previously assembled with the latticed slab reinforcing bars corresponding to the ribs, between the PCa beams. As a result, initial upward displacement is caused in the latticed slab reinforcing bars to provide for great span while controlling sagging due to creeping or cracking and to solve problems on a crane during construction.;COPYRIGHT: (C)2001,JPO