A post-frame building from Quality Structures is simply the best value for the money. We have distinguished ourselves from th ... e competition by incorporating standard features into our buildings that create the QSI ADVANTAGE. Continuous ridge ventilation 29 gauge steel on roof, sides, trim 4’ O/C trusses @ 4/12 pitch 8’ O/C sidewall glue/nail laminated columns Ledger Loc fastened 2-ply truss supports 2’ O/C 2x4 roof purlins 2’ O/C 2x4 side girts Treated 2x6 skirt at ground line Steel rodent guard at base 48” post holes with concrete footings Uplift Protection read more