Testing of Structural
Long-Span Bar Joists.
Testing program in steel plant for
longspan steel joists with deficient
welds, for Houlton Regional Hospital.
Work involved design of test apparatus,
specification of test criteria,
and supervision of the testing.
Test frame with longspan joist in place.
Failure of web member of joist during
long-span joist testing.
Connection Angles in Outward Bending,
connection angles at the ends of beams act in shear in the plane of the
support; i.e. there is no significant outward bending. The beams have
these connections at both ends, and thus are stable. However, when there
is connection angles at one end only, the beam will cause the connection
angles to bend outward, a condition for which they are not designed or expected
to develop significant resistance. The purpose of the testing was to
determine the load capacity at failure and observer the mode of failure.
See Forensic Engineering in
Construction No. 5
Test frame with sample mounted to frame.
Test frame and sample in testing machine, during test.
Sample at end of test, showing weld failure.