2. Gypsum Board: Two (2) hour rated walls have two (2) layers of 5/8" Type 'X' gypsum wallboard panels on each side of the steel studs. The "Fire Tape" product would be used as an alternative to conventional joint tape in specific systems when: 3.
How thick is a 2 hour fire rated wall?
A 2-hour rating can be achieved by a wall with an equivalent thickness of as little as 3 1/5 inches when expanded slag or pumice is used or 4 1/2 inches when siliceous gravel is used as the aggregate. For cored units, the equivalent wall thickness is calculated by multiplying the percent solid by the wall thickness.
Does 2 layers of plasterboard fire rating?
Two layers of standard plasterboard with staggered joints will give an hours protection and one layer half an hour. This means nothing if lights are recessed into the ceiling, as there is nothing to protect the floor structure. Hence fire rated down lighters.Mar 4, 2008
What is the fire rating of 5/8 Type C drywall?
Type C drywall is known as the more durable version of Type X—there are more glass fibers in this product as well as more vermiculite components, giving it a fire resistance of 2-4 hours. You can find this product at your local drywall and insulation store in 1/2” and 5/8” thickness.
What is the fire rating of 5/8 drywall in a ceiling?
1 hour
What is the fire rating for 5/8 drywall?
1 hour
What is the minimum thickness of fire retardant Sheetrock?