![]() ![]() There are no other combinations possible.įor the odd/even spans you will find maximum positive moments.įor the adjacent spans you will find maximum negative moments.įor some of the adjacent and, I think, the total load you will get maximum shears. The combinations required are comprised of six arrangements:Īdjacent span arrangement 1 (load spans 1, 2, 4, 5)-skip 3 and 6Īdjacent span arrangement 2 (load spans 2, 3, 5, 6)-skip 1 and 4Īdjacent span arrangement 3 (load spans 1, 3, 4, 6)-skip 2 and 5 This creates situations where higher moments and shears occur over that found by loading all the spans together. In building design (and in a different way in bridge design) the building codes require that any type of continuous framing be analyzed with due regard for possible combinations of loaded spans.įor instance, if you have a six span beam system, it is possible in a floor area to have some of the beams loaded and some not.
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