847 Series - Commercial Security Standard Features Meets Commercial Security Specifications Steel Stiffened Core 1-3/4 Inches Thick 16 Gauge Top & Bottom Channels Fiberglass Insulated Between Stiffeners 4" Stiffener Spacing 14 Gauge Face Skins Fire Rated up to 3 Hours Sizes from 2068 to 50100 Rugged Perimeter Channel Construction For more detailed information, please see the link below. Find technical information here >>