Maximum Duty Doors (per ANSI A250.8):

Level 2 (14 gage)

Model 2 (Seamless)

Physical Performance B (1,000,000 minimum cycles)

Pioneers Maximum Duty doors are made primarily of 14 gage carbon steel and have been tested to 4,000,000 cycles in accordance with ANSI A250.4.

Featured Doors: Pioneers Maximum Duty doors are primarily available with a C-Series (Steel Stiffened)

Maximum Duty doors are available with a continuously welded seamless edges for heavy duty strength and a seamless appearance.

Applications include: High Security Industrial and Institutional Entrances and Exits. For a complete Usage Selection Guide, Click the link at the bottom.

Click here for the complete usage guide.


Standard Cores for Heavy Duty Doors are Honeycomb (H Series).

Swing options: RH, LH, RHR, LHR (Handed and Beveled), or Reversible (Square Edge)

Edge options: Continuously Seam Welded (CH, CHP, CHR, CHT, C)

Material options for Heavy Duty doors:

Standard Gage for Maximum Duty doors are 14 gage.

Available Widths: 2'0, 2'4, 2'6, 2'8, 3'0, 3'4, 3'6, 3'8, 4'0

Available Heights: 6'8, 7'0, 8'0

Special Heights and Widths available; please consult Factory.

Standard Door Elevation is Flush (F)

Additional Elevations:

Pioneer Heavy Duty Doors shall be cleaned and given one coat of baked-on rust inhibitive metal primer in compliance with ANSI A250.10.

Pioneer Heavy Duty doors can be prepared for almost any hardware configurations. All hardware by others except where noted.

Click here for door fire ratings.


For Better Sound Properties, supply Honeycomb cores for Interior Openings. Panel has been tested up to 32 STC (ASTM E90, ASTM E413) and can be fire-rated up to 3 hours. Specify H Series for lock-seam (Full flush) and CH Series for a Seamless edge.


For Better Insulating Properties, supply Polystyrene or Polyurethane cores for Exterior Openings. Polystyrene (U-factor: .37, R-factor:2.70) and Polyurethane (U-factor: .34, R-factor: 2.92) cores tested in accordance with SDI-113-01 and ASTM C1363-05 (“Hot Box Apparatus”) and can be ordered galvannealed (A60) with top caps sealed against weather penetration. Specify HP (Polystyrene), HT (Polyurethane) for lock-seam (full flush) and CHP or CHT for a seamless edge.


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