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Analysis of Statically Determinate Trusses

1!Common Types of Trusses !Classification of Coplanar Trusses !The Method of Joints!Zero-Force Members!The Method of Sections!Compound Trusses !Complex Trusses !Space TrussesAnalysis of Statically Determinate Trusses2 Common Types of Trussesgusset plate Roof Trussestop cordroofpurlinsknee bracebottom cordgusset platespan, 18 - 30 m, typicalbay, 5-6 m typical3 Howe truss18 - 30 mPratt truss18 - 30 mHowe trussflat roofWarren trussflat roofsaw-tooth trussskylightFink truss> 30 mthree-hinged archhangar, gymnasium4 Bridge Trussestop corddecksway bracingtop lateralbracingstringersportal end postportalbracingpanelfloor beambottom cord5trough Pratt trussdeck Pratt trussWarren trussparker truss(pratt truss with curved chord)Howe trussbaltimore trussK truss61. All members are connected at both ends by smooth frictionless All loads are applied at joints (member weight is negligible).Notes: Centroids of all joint members coincide at the joint. All members are straight.

determinate, or statically indeterminate. The trusses are subjected to arbitrary external loadings that are assumed to be known and can act anywhere on the trusses. 13 SOLUTION Externally stable, since the reactions are not concurrent or parallel. Since b = …

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