Publication Date

Summer 2019

Degree Type


Degree Name

Master of Science (MS)




Kurt McMullin


steel strap connectors, wood frame structures

Subject Areas

Civil engineering


Metal wood-connection hardware straps are sometimes installed in ways not intended

by the manufacturers; in particular, a shear-wall anchor strap which was manufactured to

be used in straight alignment to connect a post above a particular floor of a building to a

post below that floor may instead be bent and wrapped around a floor beam. Four

specimens using steel straps were constructed and tested in order to simulate building

situations. The experimental specimens had wooden posts and engineered-wood floor

beams, connected by straps, arranged so that the load paths passed through the straps

being tested; the control specimens had post-to-post connections. The specimens were

tested monotonically by applying tension, in order to determine whether the performance

of the straps was altered when installed in bent configurations. Two tests on each of the

MSTA36 and CMSTC16 steel straps intended for wood-connection, manufactured by

Simpson Strong-Tie, Inc., were performed, and results were measured. No fracture

occurred at a strap bend. All specimens showed evidence of post-yield elongation at time

of fracture. Neither of the two straps which were wrapped around the floor beam showed

any reduction-of-effective-capacity effect due to the bending of the straps at the corners

of the beam. The results suggest that metal straps may, in the situation tested, be used

effectively in bent and wrapped configurations.