42" x 84" Steel Door Slab — Cylindrical Prep, 20 Ga, 90-Min

42 x 84 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. An extra-wide leaf for equipment access, service corridors and loading areas with taller frames. Specifications Nominal size 42" x 84" Actual slab size 41-3/4" x 83-1/4" 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 171 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 42 x 84 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.