1 Hour Fire Rated Attic Wall
1 hour wall rating.
1 hour fire rated attic wall. Type c fire rated drywall has more glass fiber reinforcement and other ingredients compared to type x which make it superior to type x. Rating 1 1 2 hours. The lmf60 model is a new generation attic ladder that provides access to unused space in the attic and at the same time functions as a fire protection for 60 minutes 1 hour rating in accordance with nfpa 288 and astm e119 14. 400 deg f at 60 mins.
Type x fire rated gypsum drywall is 5 8 inch thick and installed on each side of a wood framed wall to create the fire separation. Maximum door size of 48 x 48. Fire rated ceiling or attic access panels. For installation in vertical wall assemblies.
According to the book commercial drafting and detailing a typical one hour fire rated wall consists of 2x4 studs spaced 16 inches from the center of one stud to the center of the next covered by 5 8 inch type x gypsum board. The door meets ansi ul 10b standards and can. Un insulated up to 36 insulated up to 48. 250 deg f 139 deg c at 30 mins and 450 deg f 250 deg c at 60 mins.
Type c gypsum board is available in 1 2 inch and 5 8 inch thicknesses. At access doors and panels we also take pride in our insulated fire rated access door from the mifab product selection which is likewise approved by underwriters laboratories inc. Type x gypsum board is wallboard to which non combustible fibers have been added.