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Structural Insulated Panel Roof Diaphragms

Structural Insulated Panel Roof Diaphragms

Structural Insulated Panel Roof Diaphragms


Does anyone out there know where I can get some guidance on diaphragm strength of Structural Insulated Panels (SIPs) used to clad a timber-framed roof?

I have heavy timber (likely 12x16 or bigger) tied-rafters 13' o.c. with a 8 on 12 pitched gable roof.  Building is 40'x80'. I would like to span the SIPs between the rafters and have no purlins, or ridge beam, between the timber rafters.  Essentially the SIPs would simple-span between the rafters and their only connection would be only to the top of the timber rafters and a continous timber around the roof perimeter, which supports the wall infill studs between the timber frames and serves as the diaphragm chord members.    

Any help would be appreciated.


RE: Structural Insulated Panel Roof Diaphragms

Check out the ICBO reports for different manufacturers; R-Control or Premiere have published diaphragm & shear values.

RE: Structural Insulated Panel Roof Diaphragms


Thanks for the replies.  I will look into the Va Tech and ICBO reports.

Thanks again

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