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Beam Load Support Formulas

All Beam Load tables are for simple beams supported at the ends . These can be used in the majority of the cases . There are times
when it is necessary to know what happens with other loading and support conditions . Some common arrangements are shown
below . Simply multiply the values from the Beam Load tables by factors given below .

Load Deflection
Load and Support Condition
Factor Factor
Simple Beam
Uniform Load Span 1 .00 1 .00

Simple Beam 0 .50 0 .80
Concentrated Load at Center

Simple Beam 1 .00 1 .10
Two Equal Concentrated Loads at 1/4 Points

Beam Fixed at Both Ends 1 .50 0 .30
Uniform Load

Beam Fixed at Both Ends 1 .00 0 .40
Concentrated Load at Center
Cantilever Beam
Uniform Load 0 .25 2 .40
Cantilever Beam 0 .12 3 .20
Concentrated Load at End
Continuous Beam 1 .30 0 .92
Two Equal Spans - Uniform Load on One Span Span Span

Continuous Beam 1 .00 0 .42
Two Equal Spans - Uniform Load on Both Spans

Continuous Beam
Two Equal Spans - Concentrated Load at Center of One Span 0 .62 0 .71

Continuous Beam 0 .67 0 .48
Two Equal Spans - Concentrated Load at Center of Both Spans

EXAMPLE I 60" 60" EXAMPLE II
PROBLEM: PROBLEM: 24"
Calculate the load and deflection of an W200 beam continuous Determine load and deflection of an W150 cantilever beam
over one support and loaded uniformly on one span . with a concentrated load on the end .
SOLUTION: SOLUTION:
A . From load table for W200 the load for a 60" span is 700 lbs . A . From load table for W150 the load for a 24" span is
and deflection is 0 .35" . 5,360 lbs . and deflection is 0 .09" .
B . Multiply by factors from Table above B . Multiply by factors from Table above .
Load = 700 lb . x 1 .30 = 910 lbs . Load = 5,360 lbs . x 0 .12 = 643 .2 lbs .
Deflection = 0 .35 x 0 .92 = 0 .322" . Deflection - 0 .09 x 3 .20 = 0 .288"

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