Simpson Strong-Tie MPAI44 45-1/2" Masonry Purlin Anchor for I-Joist - Galvanized Specialty Self-Drilling Screws No pre-drilling required in most

No pre-drilling required in most wood applications

so the wafer head seats flush and the connection remains tight

Residential metal roofing projects

25-year removal & replacement

The Simpson Strong-Tie F07T300TDC Self-Drilling Siding Screw is designed to deliver strength

Simpson Strong-Tie MPAI44 45-1/2" Masonry Purlin Anchor for I-Joist - Galvanized Specialty Self-Drilling Screws No pre-drilling required in mostThe Simpson Strong Tie MPAI Masonry Purlin Anchor is engineered to provide a secure, code approved wood to concrete and wood to masonry connection for open web truss and I joist applications. Specifically designed for open web truss joint connections to concrete or masonry walls, the MPAI creates a reliable load path that transfers uplift and lateral forces from roof framing into the supporting structure. Built to accommodate the geometry of open web