44" x 80" Steel Door Slab — Cylindrical Prep, 20 Ga, 90-Min

44 x 80 hollow metal door slab — 20-gauge galvannealed steel, 1-3/4" thick, with a cylindrical (knob or lever) lock prep and a 90-minute fire rating. Our widest single leaf, for equipment rooms, service corridors and loading areas. Specifications Nominal size 44" x 80" Actual slab size 43-3/4" x 79-1/4" Thickness 1-3/4" Steel 20-gauge galvannealed (corrosion resistant) Core Insulated honeycomb Fire rating 90 minutes Lock prep Cylindrical — 2-1/8" bore, 2-3/4" backset (ANSI 161) Hinge prep Universal 4-1/2", 7-gauge reinforcement Edges Inverted top and bottom channels Approx. weight 172 lb Compliance ANSI compliant, made in USA Technical documents Factory prep specifications for this door — free to download. PDFCylindrical Lock Prep — Data SheetUFD-DS-161 · ANSI/BHMA A156.115 PDFHinge Locations — Stock Door Sizes4-1/2" hinges · measured from inside top of frame Need a drawing for a non-stock size or a different prep? Call 718-841-0767. Which handing do I need? Stand on the outside of the door — the side you push from. Hinges on the left is Left Hand; hinges on the right is Right Hand. See the swing chart in the product photos if you are not sure. What's included One 44 x 80 steel door slab, cylindrical prepped. Frame, hinges and lock hardware are sold separately. Pickup, delivery and installation Pick up at our Brooklyn or Brentwood warehouse, local delivery throughout NYC, or LTL freight nationwide. We also install — contact us for a combined door, hardware and installation quote, or for contractor and bulk pricing.