Simpson HU610Z ZMAX Galvanized Face Mount Joist Hanger for 6x10 Lumber 14 Ga Steel Seismic and Hurricane Ties 2 flute carbide tipped rabbeting bit with 2 flute carbide tipped rabbeting bit with a 1 2 in Sized specifically for rough 8x nominal lumber engineered to fit rough sawn posts rather than dressed lumber Extra optional triangle holes provide the ability to add fasteners for increased load capacity when project conditions require it Engineered flexibility with optional added capacity the "U" design simplifies header placement while the extra triangle holes give installers the option to increase load performance when the structural design calls for it