3.0 MODULAR SUPPORT SYSTEM 3.1.2 MT BEAM AND COLUMN LOAD TABLES
Table 57 - MT Beam Load Reduction Factors for Laterally Unbraced Channels 1 , 2 , 3 , 4
Span in ( cm )
12 ( 30.5 ) 24 ( 51.0 ) 36 ( 91.4 ) 48 ( 121.9 ) 60 ( 152.4 ) 72 ( 182.9 ) 84 ( 213.3 ) 96 ( 243.8 ) 108 ( 274.3 ) 120 ( 304.8 ) 144 ( 365.8 ) 168 ( 426.7 ) 192 ( 487.7 ) 216 ( 548.6 ) 240 ( 609.6 )
MT-20 MT-30 MT-50 MT-60 x-axis y-axis x-axis y-axis x-axis y-axis x-axis y-axis 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.93 1.00 0.91 1.00 0.98 1.00 0.86 0.90 0.79 0.95 0.89 1.00 0.90 1.00 0.86 0.81 0.75 0.90 0.76 1.00 0.83 1.00 0.83 0.71 0.70 0.69 0.64 1.00 0.77 0.95 0.81 0.62 0.66 0.69 0.54 1.00 - - 0.78 0.53 0.63 0.69 0.46 0.99 - - 0.76 0.45 0.59 0.69 0.41 0.97 - - 0.74 0.40 0.57 0.69 0.37 0.94 - - 0.72 0.35 0.54 0.67 0.35 0.92 - - 0.69 0.29 0.49 0.60 0.31 0.86 - - 0.65 0.25 0.44 0.53 0.28 0.79 - - 0.61 0.22 0.41 0.46 0.26 0.73 - - 0.58 0.19 0.38 0.41 0.24 0.68 - - 0.54 0.17 0.35 0.36 0.23 0.62
Table 58 - MT Beam Load Reduction Factors for Laterally Unbraced Girders 1 , 2
Span in ( cm )
24 ( 51.0 ) 36 ( 91.4 ) 48 ( 121.9 ) 60 ( 152.4 ) 72 ( 182.9 ) 84 ( 213.3 ) 96 ( 243.8 ) 108 ( 274.3 ) 120 ( 304.8 ) 144 ( 365.8 ) 168 ( 426.7 ) 192 ( 487.7 ) 216 ( 548.6 ) 240 ( 609.6 )
MT-70 MT-80 MT-90 MT-100 x- and y-axis x- and y-axis x- and y-axis x- and y-axis 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Modular Support Systems Technical Guide , Edition 1
1 . Linear interpolation is not permitted . 2 . Reduction factors in table are based on loading through the shear center of the cross section . The impact of torsion is not accounted for in these values . 3 . Reduction factors are to be applied to the tabulated beam load values for fully braced spans . Additional modification factors based on loading and support conditions may apply per Table 12 on page 32 . 4 . Tabulated values conservatively assume a value for the lateral torsional-buckling modification factor , C b
, of 1.0 .
1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
1 . No reductions to the published allowable MT beam load capacities herein are required for unbraced girder spans up to 240 inches . 2 . Additional modification factors based on loading and support conditions may apply per Table 12 on page 32 .
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