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coo.31924003871732-141
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Two way coefficient
Transcript of coo.31924003871732-141
DESIGN OF TWO-WAY SLABS
318-133
(c) Shear — The shear stresses in the slab may be computed on the
assumption that the load is distributed to the supports in accordance
with Table 4.
(d) Supporting beams — The loads on the supporting beams for a
two-way rectangular panel shall be computed using Table 4 for the
percentages of loads in "A" and "B" directions. In no case shall the
load on the beam along the short edge be less than that of an area
METHOD 3—TABLE I—COEFFICIENTS FOR NEGATIVE MOMENTS IN SLABS*
MA ».( = Ci„,XlllX A2)
> where w = total uniform dead plus live load
Mb = C5ll,xii)X B2;
Ratio
Case 1
Case 2
Case 3
Case 4
Case 5
Case 6
Case 7
Case 8
Case 9
m = ^r
<l 1
e
a
Li
LJ
□
i i
LJ
o
Ca neg
0.045
0.045
0.050
0.050
0.075
0.071
0.033
0.061
0.061
0.033
1.00
Cb neg
0.076
0.071
Ca neg
0.050
0.041
0.055
0.045
0.079
0.075
0.038
0.056
0.065
0.029
0.95
Cb neg
0.072
0.067
Ca neg
0.055
0.037
0.060
0.040
0.080
0.079
0.043
0.052
0.068
0.025
0.90
Cb neg
0.070
0.062
Ca neg
0.060
0.031
0.066
0.034
0.082
0.083
0.049
0.046
0.072
0.021
0.85
Cb neg
0.065
0.057
Ca neg
0.065
0.U27
0.071
0.029
0.083
0.086
0.055
0.041
0.07b
0.017
0.80
Cb neg
0.061
0.051
Ca neg
0.069
0.022
0.076
0.024
0.085
0.088
0.061
0.036
0.078
0.014
0.75
Cb neg
0.056
0.044
Ca neg
0.074
0.017
0.081
0.019
0.086
0.091
0.068
0.029
0.081
0.011
0.70
Cb neg
0.050
0.038
Ca neg
0.077
0.014
0.085
0.015
0.087
0.093
0.074
0.024
0.083
0.008
0.65
Cb neg
0.043
0.031
Ca neg
0.081
0.010
0.089
0.011
0.088
0.095
0.080
0.018
0.085
0.006
0.60
Cn hoc
0.035
0.024
Ca neg
0.084
0.007
0.092
0.008
0.089
0.096
0.085
0.014
0.086
0.005
0.55
Cb neg
0.028
0.019
Ca neg
0.086
0.006
0.094
0.006
0.090
0.097
0.089
0.010
0.088
0.003
0.50
Cb neg
0.022
0.014
*A cross-hatched edge indicates that the slab continues across or is fixed at the support;
an unmarked edge indicates a support at which torsional resistance is negligible.
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