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REACTIONs AND STREssEs 132
GRAPHIC STATIcs 3357
Roor TRUSSES 5868
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acting angle applied arch assumed axis bar stresses bending bending moment bracing bridge cantilever caused clockwise column compression computed concentrated load dead load deﬂection curve diagonals elastic weights end moments equation equilibrium polygon Example ﬁber ﬁgure ﬁnd ﬁnding ﬁrst ﬁxed end ﬂoor beam force polygon force system free body funicular polygon girder given gives horizontal indeterminate inﬂuence line intersection joint kip-ft kips length line of action live load load shown lower chord magnitude method method of moment moments of inertia movement Note ordinate panel loads panel point parallel plane points of contraﬂexure positive Pratt truss PROB Problem reaction components redundant rotation secondary stresses shown in Fig slope deﬂection solution span statically determinate stress in bar stringers structure tension theorem top chord triangle truss shown uniform load unit load unknown vertical component Warren truss wheel zero