Two-way_slab_with_stiff_support

Two-way_slab_with_stiff_support - Example on Two-way Slab...

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1 Example on Two-way Slab with Stiff Supports: Figure 1: Plan of the floor The roof of a storage facility supports a live load of 2.4 kN/m 2 , a snow load of 1.6 kN/m 2 , and a superimposed dead load of 1.44 kN/m 2 . The roof slab is supported on all sides by stiff beams or masonry block walls. Given: f y =400MPa , f c =25 MPa Solution: Step 1 : Check stiff support Stiff support requires 3 3 n / 2.0 w s b b h l h Here it is given that the slab is supported by stiff support. OK Step 2 : Select Slab thickness Deflection requirements (Cl.13.2.5 and Appendix B.3.1) Corner A -B-1-2 (S1) governs: β = 6000/5200=1.15; and assume m α =2.0 (Cl.13.2.5) h s = β α m y n f l 4 30 ) 1000 / 6 . 0 ( + + = 15 . 1 * 2 * 4 30 ) 1000 / 400 6 . 0 ( 6000 + + = 153 mm (B.3.1) min 2 (6000 5200) 160 140 140 s perimeter h mm × + = = = Try h s = 160mm.
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