Lane Supports (Reactions at Interior Piers) |
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Assign the nodes constituting interior supports in a multiple span being considered for moving load analysis using traffic lane loads. When the AASHTO LRFD load is applied and maximum reactions in the Z-direction are sought, the program automatically reflects the requirement of the effect of 90% of two design trucks spaced at 50 ft and 90% of the design lane load for maximum and minimum reactions in accordance with AASHTO LRFD. The requirement of 14 ft distance between the 32 kip axles is also maintained. PennDOT Design Truck (PHL-93TRK) For the reaction at interior piers only, 90% of the effect of two design trucks spaced a minimum of 50 ft. between the lead axle of one truck and the rear axle of the other truck, combined with 90% of the effect of the design lane load. The distance between the 32 kips axles of each truck shall be taken as 14 ft.. The two design trucks shall be placed in adjacent spans to produce maximum force effects. (PUB 15M (5-12) 3.6.1.3.1.) PennDOT Tandem (PHL-93TDM) For the reaction at interior piers only, 100% of the effect of two tandems with axle weights of 25 kips spaced from 26 ft. to 40 ft. apart combined with the effect of the design lane load. The two tandems should be placed in adjacent spans to produce maximum force effects. (PUB 15M (5-12) 3.6.1.3.1.) |
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From the Main Menu select Load > Moving Load > Lane Supports - Reactions at Interior Piers. |
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