details matter

With the wide variety of opening options, hardware, local regulations and more, it's essential to understand the technical requirements of your specific jobsite and the products that are compatible. Below are the basics. Things change quickly and without notice, so always feel free to check with us for the most up-to-date versions or if you'd like to explore an option that isn't listed. We can get creative to find a workable solution for most projects.

Available Configurations

Double Rabbeted Jamb (Solid)

Fire Rating: 20

Flat Jamb w/ Flat Stop

Fire Rating: 45, 60, 90

Flat Jamb w/ T-Stop

Fire Rating: 20, 45, 60, 90

Single Rabbeted Jamb (Solid)

Fire Rating: 20

2 Piece Simulated single
Rabbetted Jamb

Fire Rating: 45, 60, 90

2 Piece Simulated single
Rabbetted Jamb (PLOWED)

Fire Rating: 20, 45, 60, 90

Communicating Frame

Fire Rating: 20, 45*, 60*, 90*. (*will be two piece)

Communicating Frame w/ Stops

Fire Rating: 20*, 45, 60, 90 (*will use T-stop)

Custom Options

So long as the general parameters are met, we can make some custom profiles, sizes, configurations, etc. Always ask if you're unsure.


All products have defined limitations in their rating, but some allow for some variations. Please ask if you have something a little outside of the box.

Specs & Documents

Work bench in wood work shop with notebook and pencil.

Intertek Listing Reports

Gypsum Core Frame (discontinued)


Frames are available in dozens of species including FSC materials and most are available in plain, quarter and rift sawn wood. The primary limitations are "knotty" or "rustic" species (they have holes in them!) or those too soft and porous. Most traditional domestic and exotic hardwoods are acceptable. We've made frames in over 100 species. Contact us if you have any questions or concerns about what species do or don't meet the standard.

Hardware Requirements

Fire-rated openings require acceptable components to create the opening unit - thats the door, the frame and the hardware. The wide world of hardware keeps expanding and innovating. Some of that hardware has not been tested and some requires such a dramatic modification to the door or frame to render them unfit for a fire-rated opening. Below are some helpful guidelines, but always contact us to be sure. We're also always testing and researching how we can incorporate the newest hardware into approvable frame designs.

Approved Hardware

The following hardware types are approved on all fire-rated frames:

  • Traditional Hinges
  • Traditional Strikes & Deadbolts
  • Electric Hinges
  • Silencers
  • Lightswitches
  • More (inquire)

Limited or Excluded Hardware

The following hardware types have special stipulations to use or may be incompatible in some cases. Please contact us for clarification on any of the below.

  • Continuous Hinge
  • Double-acting Hinges
  • Pivots
  • Concealed Hardware
  • Electrified Hardware (strike, power transfer, raceways)