Simpson Double 4 x 10 Face Mount Joist Hanger, Galvanized HU410 2 Hip Connector Engineered and tested by Simpson Engineered and tested by Simpson Strong Tie backed by the engineering rigor and quality standards that make Simpson Strong Tie connectors the go to choice for engineers and contractors on both residential and commercial projects delivering reliable pin fastening performance in steel applications reliable standards The Simpson HU410 2 Heavy Duty Face Mount Joist Hanger is engineered by Simpson to deliver the additional strength and safety factors demanded by structural framing projects that rely on doubled up joist configurations