The PF series hangers have been redesigned to accommodate collated nails (0.148 x 1 1/2") as well as the 10d common nail (0.148 x 3"). The PFB and PFDB have dome-shaped joist nail holes that guide nails into the proper installation angle. The redesign also features a folded seat that raises the 2x joist very slightly above the seat radius to enable a tighter connection to the back of the hanger. For saddle hangers, PFDB and PFDSB are for solid sawn lumber carrying members, and PFDL is for LVL carrying members
