Civil Engineering Reference
In-Depth Information
Table 9.2
Basic deflections for interior panels of two-way slab systems
Deflection at A, B or C
=
(coefficient × 10
−
3
)
ql
4
(
EI
)
slab
(EI)
beam
c/l
=
0.0
c/l
=
0.1
c/l
=
0.2
s
/
l
s(
EI
)
slab
A
B
C
A
B
C
A
B
C
1.0
0.0
5.81
4.35
4.41
3.04
2.89
1.73
0.2
4.38
2.99
same
3.40
2.07
same
2.40
1.22
same
0.5
3.31
1.98
as
2.71
1.41
as
2.05
0.85
as
1.0
2.60
1.30
B
2.22
0.92
B
1.79
0.56
B
2.0
2.06
0.77
1.84
0.54
1.58
0.33
4.0
1.74
0.43
1.59
0.30
1.44
0.18
0.8
0.0
4.20
3.78
2.30
3.01
2.62
1.31
1.89
1.55
0.57
0.2
3.16
2.71
1.49
2.37
1.92
0.88
1.59
1.16
0.40
0.5
1.46
1.95
0.99
1.91
1.38
0.59
1.36
0.85
0.28
1.0
1.91
1.34
0.63
1.54
0.95
0.38
1.17
0.58
0.18
2.0
1.47
0.83
0.36
1.24
0.58
0.22
1.00
0.36
0.11
4.0
1.16
0.48
0.19
1.03
0.33
0.12
0.89
0.20
0.06
0.6
0.0
3.27
3.21
0.99
2.34
2.28
0.40
1.43
1.37
0.08
0.2
2.56
2.46
0.63
1.89
1.78
0.27
1.19
1.08
0.06
0.5
2.01
1.87
0.40
1.50
1.34
0.17
0.98
0.98
0.04
1.0
1.53
1.35
0.25
1.16
0.96
0.11
0.79
0.59
0.03
2.0
1.10
0.87
0.13
0.85
0.61
0.06
0.61
0.37
0.02
4.0
0.77
0.51
0.07
0.63
0.35
0.03
0.48
0.22
0.01
0.4
0.0
2.84
2.84
0.31
2.04
2.04
0.04
0.2
2.31
2.30
0.20
1.66
1.65
0.03
0.5
1.83
1.81
0.12
1.31
1.28
0.02
1.0
1.37
1.34
0.07
0.98
0.94
0.01
2.0
0.93
0.88
0.04
0.66
0.61
0.01
4.0
0.59
0.53
0.02
0.42
0.36
0.00
h
3
12(1
−
ν
(
El
)
slab
=
E
c
2
)
q
=
load intensity;
h
=
slab thickness;
ν
=
Poisson's ratio.
Basic deflection values do not account for the effects of the reinforcement, creep or cracking.
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