Width = 6.5 ; In case of Slab (S 2), the design for Panel 2 is similar to the design for Panel 1 For Slab (S 1) and Slab (S 3), Moment of Inertia of edge slab, I s 6.5 12 6 3/12 = 1404 in4 For these two slabs, no beam along panel length; 1 = 0 Transverse edge beam t = E cb C/2E cs I s = 5309/(2 1404) = 1.89 2.5