Frame and Door Tolerance
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Did you know ANSI has new door and frame tolerances?
ANSI/NAAMM HMMA 841-07 (June 12, 2007)


Manufacturing Tolerances
  1. Manufacturing tolerances shall be maintained within the following limits:

    1. Frame product for singles or pairs of doors
      1. Width, measured between rabbets at the head:
        nominal opening width + 1/16 in. (+1.5 mm), - 1/32 in. (- 0.8 mm)
      2. Height (total length of jamb rabbet):
        nominal opening height + 1/16 in. (+1.5 mm), - 1/32 in. (- 0.8 mm)

    2. Frame for glazing materials or panels, height and width of each opening +/- 1/16 in. (1.5 mm)


    3. Surface flatness of factory assembled frame product (measured in any direction with straight edge placed on face of frame product)................ Max. 1/8 in (3.1 mm)


    4. Cross sectional profile dimensions
      1. Face +/- 1/32 in. (0.8 mm)
      2. Stop +/- 1/32 in. (0.8 mm)
      3. Rabbet for door/glass/panel +/- 1/32 in. (0.8 mm)
      4. Depth +/- 1/16 in. (1.5 mm)
      5. Throat +/- 3/32 in. (2.4 mm)

        Frames overlapping walls (except slip-on construction) to have throat dimension 1/8 in. (3.1 mm) greater than dimensioned wall thickness to accommodate irregularities in wall construction.

    5. Doors ; Tolerances for actual hollow metal door sizes are as follows:
      1. Width .................................................... +/- 3/64 in. (1.2 mm)
      2. Height  .................................................. +3/64 in. (1.2 mm)
      3. Thickness  ............................................. +/- 1/16 in. (1.5 mm)
      4. Perimeter flatness .................................. 1/16 in. (1.5 mm) maximum
      5. Surface flatness ..................................... 1/8 in. (3.1 mm) maximum
      6. Twist .................................................... 1/16 in. (1.5 mm) maximum
      7. Squareness ........................................... 1/16 in. (1.5 mm) maximum

    6. Hardware:
      1. Cutouts ................................................. Template dimensions + 1/64 in. (0.4 mm), - 0
      2. Location ................................................ +/- 1/32 in. (0.8 mm)
      3. Between hinge centerlines ...................... +/- 1/64 in. (0.4 mm)
      4. Face cutout for hinge............................... + 1/16 in. (1.5 mm), -0
      5. Mortise depth of reinforcement ................ +/- 1/64 in. (0.4 mm)

        These tolerances provide a reasonable guideline for manufacturing of hollow metal products. However, it should be noted that the cumulative effect of manufacturing tolerances at or near their maximum levels could have an effect on operating clearances. Tolerance buildup occurs when several tolerances are at or near their maximums. Care should be taken to keep each of these tolerances as close to zero as possible.
         
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Concept Frames, Inc.
2015 Industrial Drive
Newton, NC 28658

Phone: (888) 234-9455
Fax: (800) 631-9089