Secondly, the least length of pretensioned prestressedconcreteslab is defined to make the full use of steel strand strength and avoid flexural crack occurs within the development length.
The design of cast-in-place prestressedconcrete hollow slab is different from concrete hollow cast slab or prestressedconcreteslab, these differences should be paid attention to during the design.
］大跨度预应力空心板的设计有不同于普通混凝土空心板和预应力实心板之处，需要在设计中加以注意。
3
Post tensioned prestressedconcrete hollow slab(PTPCHS) is one of high strength prestressedconcrete hollow slab, and its construction performance is still unknown yet.