Structural Insulated Panel Roof Diaphragms

[KMCovert]

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.

Thanks.

 

[WillisV]

A significant amount of research was performed on this topic at Virginia Tech. In particular this dissertation by David Carradine would be of use:

http://scholar.lib.vt.edu/theses/available/etd-08142002-232925/

 

[lsmfse]

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

 

[KMCovert]

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

Thanks again