Simpson Strong Tie HM9Â High Uplift Hurricane Tie Kit for Roof Rafters & Concrete Walls G90 Galvanized Qty. 20 DTT DJT14Z Deck Joist Ties This premium model spiral cup This premium model spiral cup wheel shouldn't be slept on as it comes from a manufacturer in Syntec that has been changing the game of diamond tools for decades Versatile Design: Accommodates sloped and skewed joist seats up to 45° Simpson Strong Tie HM9 Hurricane Ties are designed to create secure roof to wall connections that help structures resist uplift forces caused by high winds and severe weather conditions these connectors strengthen critical structural joints and provide dependable uplift resistance to help maintain the integrity of the building envelope