Cut Sheet

Metal Framing Engineering Data
D-112
Metal Framing, Pipe Hangers and Accessories
COLUMN LOADING
The load bearing capacity of column or compression members is a function of the inherent
configurational strength, the unbraced length and design of the end connections.
Values of axial column loading given in Table 3 were calculated using a rotationally free and
translation fixed correction at each end (see illustration I). This gives an end condition
constant (K) of 1.
If other end conditions are used, axial loading should be calculated using procedures in the
AISI specification for the design of cold formed steel structural members (SG671) and the
engineering values for Superstrut channel given in Table 1.
End Condition Code
Rotation fixed and translation fixed
Rotation free and translation fixed
Rotation fixed and translation free
EXAMPLE I
PROBLEM:
Determine the load and deflection of an A-1200 beam continuous
over one support and loaded uniformly on one span.
SOLUTION:
A. From load table 3 for A-1200 the load for a 5'0" span is 706 lbs. and deflection is .358".
B. Multiply by factors from Table 6.
Load = 706 lbs. x 1.30 = 917.8 lbs.
Deflection = .358 x .92 = .329"
Design Applications (continued)
EXAMPLE II
PROBLEM:
Determine load and deflection of an E-1200 cantilever beam with a concentrated load on the end.
SOLUTION:
A. From load table 3 for E-1200 the load for a 3'0" span is 2216 lbs. and deflection is .088".
B. Multiply by factors from Table 6.
Load = 2216 lbs. x .12 = 265.9 lbs.
Deflection = .088 x 3.20 = .282"
5"–0"
5"–0"
3"–0"
.65
.80
1.0
K Value
Column
Height
Illustration 1