In STADD we see AASHTO LL option to be only for HS designations(HS 20, HS15 ). How to define for HL-39 loading , or how to input file for HL-93.
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In STADD we see AASHTO LL option to be only for HS designations(HS 20, HS15 ). How to define for HL-39 loading , or how to input file for HL-93.