Weyerhaeuser is occasionally asked about the use of proprietary sheathing fasteners in framing composed of our Trus Joist engineered wood products. Weyerhaeuser does not evaluate or endorse proprietary fasteners for use with Trus Joist products. Weyerhaeuser design guidance with those products is based upon the use of typical sheathing fasteners as prescribed in the model building code. There may be cases where proprietary fasteners are specified, but it is the specifier's responsibility to determine the suitability of the fastener and its effect on the Trus Joist product. Below is a link to a technical bulletin that provides design information to consider when using proprietary fasteners for sheathing attachment.