rohtak1 opt 2
TRANSCRIPT
8/17/2019 Rohtak1 Opt 2
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a es g n:
Slabs are designed as per Appendix-C of I.S.456-1978
Mx = ax * w * lx2
My = ay * w * lx2
Where:
Mx = Moment on strip of unit width spanning lx
My = Moment on strip of unit width spanning ly
w = Total design load per unit area
ax,ay = Coefficient given in Appendix-C of I.S.456-1978
depending upon Edge Conditions and Aspect Ratio
lx = Effective Span in X direction
ly = Effective Span in Y direction
Lx = Clear Span in X direction
Ly = Clear Span in Y direction
lx = Lesser of (Lx + Effective Depth ) & Centre to Centre of Support
ly = Lesser of (Ly + Effective Depth ) & Centre to Centre of Support
Slab Reinforcement Curtailment
Negative Reinforcement at Continuous Edge = 0.30 l from edge of support
Negative Reinforcement at Discontinuous Edge = 0.15 l from edge of support
Concrete Grade in N/mm2 (sck) = 15
Steel Gradein N/mm2 (sy) = 415
Most Critical Slab
S.No. Edge Condition Total Depth (m) Lx (m) Ly (m) ly/lx Load (T/m2)
1 0.150 4.750 5.060 D.L. 0.550 ax(-)ve 0.0352 Mux(- ve) 1.004 As tx(-ve) 2.32 Tor 8 @ 216 Tor 10 @ 338 Tor 12 @ 486
1 Interior Panel ax(+)ve 0.0265 Mux(+ve) 0.757 Astx(+ve) 1.73 Tor 8 @ 290 Tor 10 @ 454 Tor 12 @ 654
Eff. Depth (m) lx (m) ly (m) L.L. 0.250 ay(-)ve 0 .0 32 0 M uy (- ve ) 0 .9 13 Asty( -ve) 2 .1 0 Tor 8 @ 239 Tor 10 @ 373 Tor 12 @ 538
Drawing Room 0.126 4.876 5.186 1.064 Total 0.800 ay(+)ve 0.0240 Muy(+ve) 0.685 As ty(+ve) 1.56 Tor 8 @ 323 Tor 10 @ 504 Tor 12 @ 726
Required Tor 8 @ 216 ( in Short span) and Tor 8 @ 323 (Long span).
Moment Coefficients Factored Moments (Tm) Steel Area (cm2 /m) Bar Description