Would a coil strap over plywood over blocking work?
Tarek Mokhtar, SE
>I have a design and detail question. I'm working on a single story
>wood framed building with truss rafter roof. The lateral stability
>for wind is provided by wood sheathed shear walls. The trusses are
>parallel chord with bottom chord bearing. There is also a tall
>parapet that is part of the truss. At the face of wall the vertical
>member of the truss extends up to form the parapet.
>
>On previous typical truss rafter roofs using gable type trusses I
>design the top plate of the wall to be the chords of the diaphragm.
>I put in blocking between the trusses and transfer the shear down
>into the top plate of the wall.
>
>On this project I'm wondering what is the best way to detail this so
>that the force comes out of the diaphragm and into the top plate of
>the wall, if that is possible. If this is not practical, where else
>can I put the chord? The end of the truss is 32" deep. The plywood
>sheathing will extend up to the top of parapet. I thought about
>trying to run a ribbon at the sheathing level, but since I have this
>extension up for the parapet that does not seem feasible.
>
>Anyone come across this problem before and have some creative
>solutions for designing and detailing the chords of the diaphragm?
>
>Thanks for your help.
>
>Rich
>
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