Ratings live and die at the frame. The MK-FRS program ships certified frames as a system — matched to leaf and hardware at the factory — with Intertek authorization covering 20, 60 and 90 minutes in wood composite and 90 minutes in steel.
Specifications
| Ratings covered | Wood composite frames: 20 / 60 / 90 min · steel frames: 90 min |
|---|---|
| Wood composite frame — 60 min | Authorization to Mark 91994 · Category C proprietary frame · min jamb depth 120 mm · stop 18 mm · certified singles 1106 × 2410 mm · installation per NFPA 80 |
| Wood composite frame — 90 min | Listing 92610 · min jamb depth 120 mm · stop 18 mm · certified singles 1106 × 2410 mm |
| Wood composite frame — 20 min | Listing 92612 · evaluated with hose stream · min jamb depth 120 mm · certified singles 1106 × 2410 mm |
| Steel frame — 90 min | Authorization to Mark 91996 · Category C · stop 15 mm · min throat opening 84 mm · certified singles 1130 × 2365 mm |
| Configurations | Single-leaf certified; pairs and double egress sit outside the current North-American frame authorization — supplied under GB 12955-2008 certificates where required |
| Test standards | UL 10C (2016) · UL 10B (2008, R2020) · NFPA 252 (2022) · CAN/ULC S104 (2015, R2020) |
| GB certificate base | Frames supplied within certified door sets — 32 active GB 12955-2008 certificates across wood, steel-wood and steel families (0.5–1.5 h) |
Evidence & documentation
- Authorization to Mark 91994 — wood composite door frame, 60 min · View PDF
- Authorization to Mark 91996 — steel door frame, 90 min · View PDF
- Listing 92610 — wood composite door frame, 90 min · View PDF
- Listing 92612 — wood composite door frame, 20 min, with hose stream · View PDF
- Full certification wall — reports, authorizations and listings · certifications
Every quote ships with the matching test report, listing extract and hardware schedule. Request a project quote.