1 Hour Fire Rated Wall Thickness

Elements of buildings the fire resistance rating classifies the ability of an assembly to confine and isolate fire within a zone comprised of fire resistance rated walls ceiling and floor assemblies.

1 hour fire rated wall thickness.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Figure 722 2 1 3 1 shows thicknesses of ceramic fiber blankets to be used to insulate joints between precast concrete wall panels for various panel thicknesses and for joint widths of 3 8 inch 9 5 mm and 1 inch 25 mm for fire resistance ratings of 1 hour to 4 hours. 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. Rockwall fire rated wall panels consist of a unique rockwool mineral fibre core called conrock with laminated sheet steel permanently bonded to both sides.

This assembly is fire rated for 1 hour from the interior side only except when brick is the exterior facing. Most type x drywall has a one hour fire rating. Where the code permits a fire rated window opening in a 1 hour exterior wall the required fire rating for the window and glazing is 45 minutes with the caveat that there are 25 width and length limits. The thickness of this drywall is 5 8 inch including all layers.

Fire rated wood frame wall and floor ceiling assemblies 5 ws4 1 1 one hour fire resistive wood frame wall assembly 2x4 wood stud wall 100 design load astm e 119 nfpa 251. It combines flame spread and burn through resistance to give your customers. 203 mm limestone aggregate concrete masonry wall with a maximum control joint width of in. If the designer wants to exceed those limits then the required rating for the window wall assembly is 60 minutes tested to astm e 119.

Go to work with a building solution that meets building code requirements for fire resistent construction while increasing structural ratings. Glass fibers are added to the board to help it retard fire. 51 mm thickness can be used in the joints of a 4 hour wall. 25 mm thickness measured perpendicular to the face of the wall of ceramic fiber in the joint can be used in walls with fire resistance ratings up to 3 hours while a 2 in.

Once rockwall panels have been installed according to the specific intertek warnock hersey certification guidelines the assembly provides 1 2 and 3 hours of fire resistance with a 4 5 and 6 core thickness respectively. When specified for these 1 hour fire rated assemblies lp flameblock sheathing reduces dead load and wall thickness versus common alternatives. Lp flameblock is an icc es evaluated component of 1 and 2 hour fire rated wall assemblies and roof deck applications.