1592953528000 1312632483000 term-55979 1616541603204 1312632550000 1616290607600 adlib fitz-online adlib-term-55979 f7328c5d-9173-39ca-80ea-853e8c7d6550 2 1 spanning slabs, one direction spanning slabs, one direction term reference term-55986 adlib-term-55986 4aaf975a-08b2-3d5a-b036-9f578e231a34 one-way solid slab systems