For 20-minute rated fire doors, the maximum size available is 3′ 6″ width x 8′ 0″ height for a single door, and 7′ 0″ x 8′ 0″ for a double door. Twenty-minute rated doors with glass are available, using a special fire-rated clear glass (called “FireLite®”). The total glass size must be no more than 1,296 square inches. Mortised flush bolts and automatic door bottoms are also available.
Twenty-minute fire-rated jambs are available in most wood species. The jamb width must be at least 4-9/16″ and will also qualify for a positive pressure fire rating with hose stream.
If you want to know more about our steel fire door wooden fire door and wood door product, please contact us on alibaba https://dljfz.en.alibaba.com/?spm=a2700.galleryofferlist.0.0.4d611f5deOdayq
