Doors

ST – Steel Stiffened Core

Key features

Increased durability and security
Interior and exterior usage
Bonded 18-gauge steel stiffeners 6” o.c. with industrial adhesive ensuring a smooth and aesthetic surface (laser welds optional)
Voids between stiffeners filled with:
- Polystyrene, all door thicknesses available
- Polyurethane, 1-3/4” door thickness only
- Mineral wool, 1-3/4’’ and 2’’ door thickness available
Edge seam options:
- Lock seam (PA) 18- or 16-gauge
- Lock seam and filled (PAF) 18- or 16-gauge
- Continuously welded seamless edge (CW) 18-, 16-, 14- and 12-gauge
Thermal performance
[R – ft²·°F·h/BTU (m²·K/W); U – BTU/ft²·°F·h (W/m²·K)]
- STPS: R1.89 (0.33) – U 0.53 (3.00) per SDI-113 (ASTM C1199, C1363, E1423)
- STPU: R1.96 (0.34) – U 0.51 (2.90) per SDI-113 (ASTM C1199, C1363, E1423)
- STW: R1.47 (0.26) – U 0.68 (3.86) per SDI-113 (ASTM C1199, C1363, E1423)

Windstorm rating

FL#46851, ±70 PSF, HVHZ, Large Missile Impact D. Available Outswing and Inswing.
Limitations apply. Consult the Windstorm tab (in the Specialty Products section) for more details.

Fire rating

STANDARD FEATURES

HARDWARE REINFORCEMENT