Simpson High Wind Uplift Purlin Heavy Hanger HWPH5.37/14 Hardie Blade Why must the included shouldered

Why must the included shouldered screws be used with this connector

and is a separate washer required

Structural connections requiring increased uplift resistance for earthquake or wind loading

Screws must be installed with a minimum of 3 exposed threads

The Simpson Strong-Tie HU46TF HUTF Galvanized Top-Flange Joist Hanger for 4x6 is a heavy-duty

Simpson High Wind Uplift Purlin Heavy Hanger HWPH5.37/14 Hardie Blade Why must the included shoulderedSimpson Strong Tie High Wind Uplift Purlin Heavy Hanger HWPH5. 37 14 is a heavy top flange hanger engineered by Simpson Strong Tie to support joists on purlins or beams in both wood and cold formed steel construction. Designed specifically for high wind applications, this hanger delivers enhanced uplift resistance along with very high download capacity, offering exceptional design flexibility and versatility for demanding structural environments. Key