Design Code, EC02 BS8110 CP65   N/mm2    

Fire rating, N.A 60 90 120 240   min     Slab is, one_way_spanning two_way_spanning   min     L_x/L_y, N.A , One way spanning   for two_way_spanning    

Concrete strength, f_ck,cube ;
during demoulding 15 10 15 20 25   N/mm2 ,     during topping 30 20 25 30 35 40   N/mm2 ,     at service stage 40 25 30 35 40 45 50   N/mm2    

steel rebar, 500 460 485 500   N/mm2     steel 'C' links, 500 460 250 460 500   N/mm2     cover, 25 15 20 22 25 30 35 40 45 50 60 65 75 80   mm    

Design width, b = 1000   mm     L_span = m    

NPS thickness, h_slab = 90 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 185 190 195 200 205 210 215 220 225 230 235 240 245 250 255 260   mm     Conrete Topping, h_topping = 100 80 60 65 70 75 80 85 90 95 100 110 115 120 125 135 145 150 155 160 165 170 175 180 185 190 195 200 205 210 215 220 235 240 245 250 255 260   mm    

Nos of equal span props during topping stage, N_props = 0 1 2 3   nos     note
- loaded length will be L_span/(N_props -1 )    

Reinforcement Diameter
reinforcements diameter, 10 6 8 10 12 13 16 20 25   mm    

Deflection check on slab at service stage
One-way spanning slabs of approximately equal span: uniformly distributed loads
Simply Supported End Span Interior Span      

Deflection control using : Rebar spacing Ast pvd