MT 2.5 Tech Supplement Guide
1.0 MT PROFILES 1.2 . MT BEAM AND COLUMN LOAD TABLES
Table
6 . Load and Deflection Factors for Beams
Span and Loading Condition Load Factor Deflection Factor Simple Beam - Uniform Load 1.00 1.00
Simple
Beam - Concentrated Load at Mid-span 0.50 0.80
Simple
Beam - Two Equal Concentrated Loads at 1 / 4 Points 1.00 1.10
Beam
Fixed at Both Ends - Uniform Load 1.50 0.30
Beam
Fixed at Both Ends - Concentrated Load at Mid-span 1.00 0.40
Cantilever
Beam - Uniform Load 0.25 2.40
Cantilever
Beam - Concentrated Load at End 0.12 3.20
Continuous Beam - Two Equal Spans , Uniform Load on One Span
1.3 0.92
Continuous Beam - Two Equal Spans , Uniform Load on Both Spans
1.00 0.42
Continuous Beam - Two Equal Spans , Concentrated Load at Center of One Span
0.62 0.71
Continuous Beam - Two Equal Spans , Concentrated Load at Center of Both Spans
0.67 0.48
NOTE
The allowable beam load tables in this technical guide are for single-span supported beams with uniform loading . Common arrangements of other load and support conditions are shown in the above table . Loads and deflections for these conditions can be determined by multiplying the load value from the tables by the given load and deflection factors . Additional reduction factors for unbraced beam lengths may apply per Table 10 on page 12 . Please note that this table can only be applicable to channels 4ft and longer , provided that max allowable shear load does not exceed the shear flow capacity . EXAMPLE Determine the maximum allowable load and deflection for x-axis bending for an MT-40D fully braced cantilever 4ft beam with a concentrated load at the unsupported end .
SOLUTION :
1 . |
Allowable load and deflection for an MT-40D with a 48 " span from Table 10 is 2,560lbs and 0.15 " |
2 . |
Multiply by factors from above table : Load = ( 2,560lbs -3.01 x 4 ) x 0.12 = 306lbs Deflection = 0.15 " x 3.20 = 0.48 " |
3 . |
Max Allowable Shear Load = 1,347lbs > 306lbs OK |
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