Civil Engineering Reference
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Table 4-5 Flat Plate or Flat Slab with End Span Simply Supported on Wall
End Span
Interior Span
1
2
3
4
5
End Span
Interior Span
1
Exterior
Negative
2
Positive
3
First Interior
Negative
4
Positive
5
Interior
Negative
Slab Moments
Total Moment
0
0.63 M
o
0.75 M
o
0.35 M
o
0.65 M
o
Column Strip
0
0.38 M
o
0.56 M
o
0.21 M
o
0.49 M
o
Middle Strip
0
0.25 M
o
0.19 M
o
0.14 M
o
0.16 M
o
Note: All negative moments are at face of support.
Table 4-6 Two-Way Beam-Supported Slab
End Span
Interior Span
1
4
5
2
3
End Span
Interior Span
Span
ratio
1
Exterior
Negative
2
Positive
3
First Interior
Negative
4
Positive
5
Interior
Negative
Slab Moments
"
2
/
Total Moment
0.16 M
o
0.57 M
o
0.70 M
o
0.35 M
o
0.65 M
o
1
Column Strip Beam
0.12 M
o
0.43 M
o
0.54 M
o
0.27 M
o
0.50 M
o
0.5
Slab
0.02 M
o
0.08 M
o
0.09 M
o
0.05 M
o
0.09 M
o
Middle Strip
0.02 M
o
0.06 M
o
0.07 M
o
0.03 M
o
0.06 M
o
Column Strip Beam
0.10 M
o
0.37 M
o
0.45 M
o
0.22 M
o
0.42 M
o
1.0
Slab
0.02 M
o
0.06 M
o
0.08 M
o
0.04 M
o
0.07 M
o
Middle Strip
0.04 M
o
0.14 M
o
0.17 M
o
0.09 M
o
0.16 M
o
Column Strip Beam
0.06 M
o
0.22 M
o
0.27 M
o
0.14 M
o
0.25 M
o
2.0
Slab
0.01 M
o
0.04 M
o
0.05 M
o
0.02 M
o
0.04 M
o
Middle Strip
0.09 M
o
0.31 M
o
0.38 M
o
0.19 M
o
0.36 M
o
α
f1
˜
2
/
˜
1
≥
D
"
/
"
1.0 and
t
1.0 and
t
β
t
≥
E
2.5
Note:
(1) Beams and slab satisfy stiffness criteria:
2.5.
1
2
1
t
"
2
/
"
(2) Interpolated between values shown for different
ratios.
1
(3) All negative moments are at face of support.
(4) Concentrated loads applied directly to beams must be accounted for separately.
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