Simpson PPBF44 4x4 Adjustable Porch Post BaseModel No. PPBF44 Nominal Post Size. 4x4 Gauge. 12 Width 1 (in.) 3 1 2 Width 2 (in.) 3 1 4 Coating Material. Simpson Strong Tie Gray Paint The PPBF adjustable porch post base safely supports porch framing through all phases of construction, eliminating the need for temporary vertical support and providing a stronger structure for contractors working on and around the porch roof. The seat adjusts to accommodate varying porch slab thicknesses from 4" to