FAQs

  • Acrovyn Doors
    • Why are the hinge screws not holding?

      If the hinge screws are not holding it is possible that the screws were over tightened with a power driver and the threads were stripped. When using a power driver, start with a low torque setting and work up to the point where the screw seats firmly but does not strip.

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    • Can I install fire labels in the field?

      No, fire labels may not be sent to, or installed in the field. The only way a door already in the field can be labeled is to send it back to the manufacturer or a licensed machinist, whoever machined the doors. Either one can apply the labels. Or you can arrange for a field inspection by Warnock Hersey ITS (WH). Field inspections generally cost between $1,000 to $2,000, dependent upon the number of doors and the travel requirements of the inspector.

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    • What work does NFPA 80 allow to be performed in the field and what must be performed by a certified manufacturer or machinist?

      Undercutting of the doors is permitted to 3/4" maximum. Kickplates may be installed in the field. Preparation of surface applied hardware, function holes for mortise locks or holes for viewers. Surface applied hardware can be applied to the face of the door without removing material from the door, except for round holes. These holes are drilled to accommodate cylinders, spindles, similar operational elements and thru-bolts. Holes should not exceed 1" with the exception of cylinders. Preparation of fire door assemblies for locks, latches, hinges, concealed closers, glass lites, vision panels, louvers, astragals, application of plant-ons (moldings) and laminated overlays shall be performed in accordance with the manufacturer's procedures and under label services. If any of the above items are done by anyone other than the manufacturer or a certified machinist, the fire label is void.

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    • Can I trim my doors to width in the field?

      No, field trimming the width of a fire-rated door will void the fire rating. Field modification is limited to function holes for mortise locks, holes for labeled viewers, a maximum 3/4" undercutting (bottom of door only), protection plates, and preparation for surface applied hardware. Pilot holes must be drilled for all screw applications as noted above.

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    • How is temperature rise determined?

      At the beginning of the fire test, the temperature on the unexposed side of the door is measured and recorded. Once the test has reached the 30 minute mark the temperature on the unexposed side is measured again. The difference between the temperature at the beginning and at 30 minutes determines the temperature rise. The results are recorded four ways: 250°F, 450°F, 650°F or greater than 650°F. The door with the lower temperature rise is considered to provide the better performance. Note: If a 450°F is specified, a door with a 250°F or a 450°F temperature rise is acceptable.

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    • What is required on a fire-rated opening?

      The door, door frame, hinges, lock or latch and closing device are all required on a fire-rated opening and must be rated. There are two exceptions to this: latches are not required on 20-minute double egress doors in a healthcare facility and a closer is not required on the inactive leaf on pairs going into mechanical rooms.

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    • How many hinges are required on a door?

      Doors up to 60" should be provided with two hinges and an additional hinge for each additional 30".

      • Up to 60" – 2 hinges
      • 61" – 90" – 3 hinges
      • 91" – 120" – 4 hinges

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    • What are the NFPA and code limitations on lites (glazing)?

      Per NFPA all ratings are limited to the size tested by manufacturer. Most building codes limit the size to 1,296 in2 up to 45-minute doors, 100 in2 for 60-minute doors, and 100 in2 90-minute doors. In a 60 & 90 minute door if the lite exceeds its max size, the doors do not qualify for a temperature rise rating.

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    • What are the allowable clearances between door and frame and door and floor for a rated door per NFPA 80?

      Measuring from the pull side of the door and frame and the meeting edge of pairs per NFPA 80: Wood doors shall not exceed 1/8"

      Bottom Clearance between Doors Maximum Gap on Swinging
      Bottom of door and raised non-combustible sills 3/8"
      Bottom of door and floor where no sill exists 3/4"
      Bottom of door and rigid floor tile 5/8"
      Bottom of door and floor coverings 1/2"

      keywords: allow, clearance, door, frame, floor, NFPA 80, NFPA, edge, wood

    • Who ultimately has the final say on what is allowed on fire doors?

      The Authority Having Jurisdiction (AHJ) has the final say on what is allowed on a fire door. Since Underwriters Laboratories and WH have to adhere to NFPA 80, their response is if an AHJ will accept a door that is in conflict with NFPA 80, they also should be able to accept a door without a label.

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    • What is the recommended method for shimming doors if necessary?

      Sometimes a door must be shimmed or moved because the door is uneven in the frame, the gap between pairs is too large or the gap exceeds the NFPA 80 maximum of 1/8". The method shown in the following details can move a door as much as 3/16", depending on the thickness of the shims. The shims should be 1/4" wide and the length should be equal to the height of the hinge. When shimming is necessary, NFPA 80 requires metal shims be used on fire-rated openings.

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    • How do I purchase replacement edges for my existing doors?

      Acrovyn® and stainless steel edges and replaceable wood stiles can be purchased by contacting the Acrovyn Doors team at 800.416.6586. Please have color, sizes, quantities, and door reference from the top of the door ready prior to placing your order.

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    • How do I clean my Acrovyn® Door?

      Instructions can be found in the Care and Maintenance section of this manual.

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    • Is the Acrovyn material itself fire rated?

      Yes the Acrovyn material alone is UL Classified and Labeled Class 1 or Class A. Acrovyn has been tested against UL 723 "test for surface burning characteristics of building materials". The test determines the surface burning characteristics of the test material. The test specifically measures the flame spread and smoke developed indices when exposed to fire. Acrovyn's results were as follows:

      • Flame spread – 20
      • Smoke Developed – 400

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    • What warranties are available for Acrovyn doors?