Extracted text: Given multi story building of 20 x 20m area as shown in the sketch, design the slabs according to AC 1318-19 using the direct design method, the building supposed to be used as office building. (Live load =1kN/m2) Assume that the ultimate compression strength of concrete is 25 MPa and the steel yield stress is 420 MPa, the thickness of the slab is 160 mm, check if Direct design method is applied, and check hmin for corner panel. a 2.0m 6.0m 6.0m 6.0m Section a-a Dimension of column = 400 x 400 mm Dimension of beam = 650 x 300 mm Dimension of slab = 160 mm 2.0m 6.0m 6.0m 6.0m 6.0m 6.0m 6.0m 2.0m