R51 Product range — Fire Rated Riser Door (both sides), premium construction with 1.2mm door / 1.5mm frame steel
120S 120 minutes (2 hours) fire rated + Smoke tested. "000" means no fire rating and no smoke testing
MD Metal Door — all R51 variants use a metal (Zintec steel) door leaf
PF Picture Frame — 25mm visible architrave, suitable for painted or exposed wall finishes
BF Beaded Frame — sits flush with the wall, designed for plaster-skim finish giving a seamless appearance
L12A 3-Point Locking System (standard) — bright zinc plated mild steel, Grade 1 low security
L19A 3-Point Budget Locking System — cost-effective alternative to L12A with same fire performance
L14A Additional slam lock — used in combination with L12A for dual-locking applications
L13A Specialist lock type — for specific security or access requirements
L21A Push-to-close locking mechanism — non-fire-rated variants only, available with 32 dB acoustic
2D Double Door — two-leaf configuration for wider openings
4D Four Door — multi-leaf configuration for large riser openings
ATN Airtight rated — compression seals for enhanced air leakage and thermal performance
36A 36 dB acoustic rating — tested to BS EN ISO 10140-2: 2010
40A 40 dB acoustic rating — highest available, tested to BS EN ISO 10140-2: 2010
32A 32 dB acoustic rating — available on non-fire-rated BF variants with L21A lock only
NB No Bead — beaded frame variant supplied without the plaster bead, for specialist finishing
PR Primed finish — supplied primed rather than powder-coated, for on-site painting
FDKLS Fire door keep-locked shut signage — signage supplied fitted to the door
MFDKLS Multiple fire door keep-locked shut signage — for multi-leaf configurations
