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Fire door machining
Machined fire doors that keep their label.
Labeled doors prepared for your hardware, lites and electrified locks by shops that are authorized and inspected for exactly that work. No void labels, no field labeling.
- Hardware preps, lite kits, louvers and raceways per listing
- Shops authorized by the door manufacturer and assessed by Intertek
- Short lead times from shops close to your project
Why machining decides whether a door passes
This is the US counterpart of a licensed system: the door system is tested once, and approved shops build to it.
- A fire door is tested and labeled as built. Every cut changes it.
- NFPA 80 allows only small preparations on site: mortise lock and function holes, labeled viewers, round holes up to 1 inch for surface hardware, limited bottom trimming.
- Everything else, such as vision lites, louvers, re-sizing or raceways for access control, needs to be done under the listing, or the door loses its label.
- The safe ways are factory machining, or machining by a shop that the manufacturer has authorized and the listing lab inspects.
How shops become authorized
Under the Intertek Machiner Program, each shop goes through these steps before it machines a labeled door:
- Manufacturer authorization: The manufacturer of the listed door or frame authorizes the shop to machine its product.
- Initial Factory Assessment: Intertek inspects each machining location: documented processes, templates, quality control.
- Authorization to Mark: After a passed assessment, the shop may apply the Warnock Hersey (WH) label to the work it is listed for.
- Routine inspections: Intertek inspects the shop regularly to confirm work follows the listing and its procedures.
Good to know
Only the listing lab, or a shop it has authorized, can label fire door work. We never apply, move or replace labels ourselves.
The process
Four steps to an authorized shop.
1 · Manufacturer authorization
The manufacturer of the listed door or frame authorizes the shop to machine its product.
2 · Initial Factory Assessment
Intertek inspects each machining location: documented processes, templates, quality control.
3 · Authorization to Mark
After a passed assessment, the shop may apply the Warnock Hersey (WH) label to the work it is listed for.
4 · Routine inspections
Intertek inspects the shop regularly to confirm work follows the listing and its procedures.
What you get as a customer
- Doors prepared to your hardware schedule, close to the project instead of across the country
- Last-minute hardware changes handled in a shop, not on the jobsite
- Label, listing reference and machining record per opening for the inspection
- One contact for doors, machining and delivery: LignoSupply
Questions
Frequently asked.
What is a fire door machiner?
A shop authorized by a listed door or frame manufacturer, and assessed by the listing lab, to machine or modify labeled fire doors within the limits of the listing and to label the result. With Intertek this is called the Machiner Program.
Why not just machine the doors on site?
NFPA 80 only allows small preparations in the field. Lites, louvers, re-sizing, larger cutouts or raceways for electrified hardware done on site can void the label. A machiner does this work in a controlled shop and the door stays labeled.
What work can a machiner do?
Whatever the manufacturer's Intertek listing allows the machiner to do, typically hardware preparations, lite and louver cutouts with listed kits, re-sizing within limits and raceways for electrified hardware. The exact scope is set per listing and per shop.
Is LignoSupply itself an authorized machiner?
No. LignoSupply coordinates the orders. The machining is done by partner shops that hold the manufacturer's authorization and have passed Intertek's assessment for that work.
Program details as published by Intertek; scope, fees and timelines are set by Intertek and the door manufacturer. Code summary for orientation, based on the International Building Code (IBC), NFPA 80, NFPA 105 and the 2010 ADA Standards. Requirements depend on the code edition your jurisdiction has adopted and on local amendments. The architect of record and the authority having jurisdiction (AHJ) decide for your project.
Related
Doors that need machining?
Send the door schedule and hardware sets. We tell you within 12 hours which preps come from the factory and which from a partner shop.
Your contact: Daniel Helmut Pinger, Tischlermeister
+49 (0) 228 76383681 · [email protected]