ST SERIES STEEL STIFFENED CORE
KEY FEATURES
Increased durability and security Interior and exterior usage Bonded 18-gauge steel stiffeners 6” o.c. with industrial adhesive Voids between stiffeners filled with:
- Polystyrene, all door thickness available - Polyurethane, 1-3/4” door thickness only - Mineral wool, 1-3/4” door thickness only Edge seam options: - Lock seam (PA) 18- or 16-gauge - Lock seam and putty filled (PAF) 18- or 16-gauge - Continuously welded seamless edge (CW) 18-, 16-, 14- and 12-gauge R-Factor (metric values in parentheses)
- STY: ASTM C1363: R1.54 (R0.27) - URE: ASTM C1363: R1.7 (R0.29) - MW: ASTM C1363: R1.8 (R0.32)
Performance
Polystyrene: Windstorm Class 1, 70 PSF, 350 ft-lbs. SeeWindstorm-resistant openings section p.33 for more details.
Fire Ratings
Available up to 1-1/2 hours for polystyrene and mineral wool. Please consult our chart on our website for size limitations.
STANDARD FEATURES
A40 galvannealed material 16-gauge top and bottom welded inverted channel
OPTIONS
A60 galvannealed material Flush or sealed top and bottom welded channel
Laser welded stiffeners Primer for A40 and A60 Factory prefinishing – powder coat only
HARDWARE REINFORCEMENTS
Hinges: 10-gauge high-frequency (optional: 7-gauge plate) Closer: 16-gauge (optional: 14-gauge, 12-gauge) Locks: 12-gauge
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