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Elements of Section Channel
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A.12A·,:
AXIS X-X
Area of
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AXIS Y-Y
,(in·4)
Stin.,)
R(in.)
1(in.4)
S(in.3)
R(in)
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.188
.203
.581
.257
.316
.680
1.166
.920
.566
.910
.514
.632..
.680
1 = Moment of inertia
S = Section modulus
R = Radius of'gyration
Beam and Column Loads Data. 'Channel Catalog Number
A-12
Beam Span :or:Uribraced
Uniform Load at Stress of
Deflection at Stress of
Colu•Alill Height
25,000 PSI (lbs.)
25,000 PSI (in.)
18" 24" 30" 36"
.031 .055 .086
2213 1680 1340
.125 .168 .225 .356
72' 84" 96" 120"
2213 1680 1340 1125 950 855 690 555 490 433 335
-594 .693 .915 1.382
1125 950 757 484 336
18" 24" 30" 36" 42" 48" 60" 72" 84" 96" 120"
6530 4895 3800 3100 2700 2300 1930 1560 1360 1200 953
.018 .033 .050 .070 .097 .124 .203 .284 .393 .438 .680
42" 48" 60"
A-12A
.
Uniform Load (lbs.) Maximum When Maximum Allowable.Load Deflection = 32
of Column (lbs.) 11300 9700 8850 8600 7550 6720 5800 4970 4250 3500 2100
247 189 121 6530 4895 3800 3100 2700 2300 1930 1560 1210 926 593
·
24340 21800 21500 21000 20600 19900 17950 15940 14750 12650 8000
.
Beam loads: Loads listed are uniformly distributed, for loads concentrated at center of span multiply uniform load at table by .5 and multiply the deflection by .8. When deflection is not a factor use stress of 25,000 PSI. When deflection is a factor use deflection of *. Column loads: Loads listed are•.or unbraced heights as listed. Modulus of elasticity = 29,000,000 PSI. Slotted or
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