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Gri-P-Late Load Ratings?

Gri-P-Late Load Ratings?

Gri-P-Late Load Ratings?

(OP)
I've been asked to evaluate the capacity of the existing roof trusses on a series of buildings that were constructed in 1961. From the manufacturer's stamp on a salvaged truss plate and some internet research, I've been able to figure out that the truss connection plates are Sanford Gri-P-Late ones and that the nails in the plates were original rather than a later addition. I've got a printout of the patent for those plates from the US Patent Office's website, the 1960 edition of the Truss Plate Institute's Design Specifications for Light Metal Plate Connected Timber Trusses, and historical NDS design values for wood are available on the American Wood Council's website... so the only piece of information I'm missing is data on the ratings of the plates themselves. History timelines of the PCWT industry indicate that this product was issued a (the first) FHA (now HUD) Architectural Standards Division product bulletin, but the current list of Use of Materials Bulletins on HUD's website doesn't go back that far (not surprising, it's expected that obsolete data would be omitted from the website). I'm assuming that there's still one or more copies of that bulletin stashed away in HUD's paper archives, but doubt that their current staff would have time to dig it out (if they even know where to look). Does anybody have (or have access to) a copy of that technical bulletin, or any other load rating data for the Gri-P-Late product?

-Sam

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