Wood Diaphragm Chord Discontinuity

[Mstrux92]

Hello,

I am designing a residence where all openings (doors and windows) are floor to ceiling. Single story house. This will cause a break in my diaphragm chord at every opening. I am planning to pocket the headers into the trusses. However, to create a continuous chord I am a little leery of simply strapping bottom of beam to top of wall plate. I have confidence in this detail when the chord is in tension, but in compression the strap will offer little resistance, and I will be relying on the contractor to install TIGHT blocking between my headers and all roof framing. Do you have any suggestions for a construct-able solution?

I am leaning towards coil strap over truss blocking offset approximately 1' from each opening (or less) and lapping the top plates each end of each opening. Needless to say, this is a fair amount of strapping and blocking, but straps and blocks are cheap..

 

[phamENG]

Why not use the band/rim board (nomenclature may vary by location) as your chord? Just make sure it has adequate tension capacity (usually does) and you have an adequate splice detail (a pair of straps is usually enough).

 

[Mstrux92]

These are roof trusses. There won't be a rim board, and I'd rather not require a band in the truss heals. Too custom.

 

[jayrod12]

Everything you are asking for is custom. You said yourself you'll be pocketing the headers, why not then pocket a band board/ribbon board into the trusses.

You can't have fancy without the costs associated with it.

 

[Mstrux92]

Yep, I was going to reapond earlier. Going with a ribbon. Thanks forthe responses.