1.4. Space Truss Systems Space truss A space truss is the three-dimensional counterpart of the plane truss described previously. The idealized space truss consists of rigid links connected at their ends by ball-and-socket joints. Whereas a triangle of pin-connected bars forms the basic noncollapsible unit for the plane truss, a space truss, on the other hand, requires six bars joined at their ends to form the edges of a tetrahedron as the basic noncollapsible unit.
A space truss is the three-dimensionalcounterpart of the plane
truss describedpreviously. The idealized space trussconsists of
rigid links connected at theirends by ball-and-socket joints.
Whereas a triangle of pin-connectedbars forms the basic
noncollapsible unitfor the plane truss, a space truss, onthe other
hand, requires six bars joinedat their ends to form the edges of
atetrahedron as the basicnoncollapsible unit.
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s TRUSS GIRDERS WITH PARALLEL CHORDS
For truss girders, it is common, to use the same static systems
as for beamgirders. The most commonly used static systems are:
Depending on the type of static system, function of girder, type
of structure andload intensity, truss girders may have different
shapes and dimensions. Theirshape is defined by geometry of chords
or external contour of girder. Thereforecommon types of truss
girders are:
