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The HPA28 purlin anchor is made of 10 gauge galvanized steel
Providing high capacity for both vertical and horizontal applications
This patented innovation distributes the load through two points on each joist nail for greater strength
The PA35 purlin anchor is made of 12 gauge galvanized steel
Simpson Strong-Tie HD9B Holdown The HPA28 purlin anchor isThe Simpson Strong Tie HD9B bolted holdown features a unique seat design which greatly minimizes deflection under load. The HDB holdowns are self jigging, ensuring that the code required minimum of seven bolt diameters from the end of the post is met. They can be installed directly on the sill plate or raised above it and are suitable for back to back applications where eccentricity is a concern. HDBs are designed to provide loads for intermediate
