How thick is a shaft wall?
Shaftwall is available in 18 and 33 mil thicknesses (25-20ga.).
What is the fire rating on shaft wall?
USG Shaft Walls provide up to 4-hour fire resistance and sound ratings to 51 STC. They resist intermittent lateral loads up to 15 psf; also resist fatigue failure under cyclic lateral loading.
What is a shaft wall?
Shaftwall systems are interior nonload-bearing fire rated wall assemblies that provide critical, life safety, fire-resistant protection for elevator shafts, stairwells, vertical chases and mechanical enclosures. Shaftwalls in elevators and stairwells are one of the most important wall assemblies in a building.
What is gypsum shaft wall?
USG Shaft Wall Systems are non-load-bearing gypsum wall partition assemblies constructed from outside the shaft at each floor. Shafts are enclosed early in construction, and the walls are finished later, along with interior partitions.
How do you build a fire rated wall?
Use steel studs and two layers of 1/2-inch Type C drywall on each side of the studs for a two-hour fire rating on an interior wall. Mount a 1 1/2-inch fiberglass barrier inside the studs. Use special fiberglass rated for use in firewalls.
Do shafts need to be fire rated?
Shaft enclosures shall have a fire-resistance rating of not less than 2 hours where penetrating three stories or more and not less than 1 hour where penetrating fewer than three stories. The number of stories connected by the shaft enclosure shall include any basements or cellars, but not any mezzanines.
Can shaft wall be load bearing?
Yes, shaft walls can be load bearing.
What is a shaft wall made of?
There are two standard approaches to the design of shaftwall systems that influence the material type used to build the shaft wall—masonry and gypsum. In more traditional shaftwall designs, architects create a structure that encloses the shaft before construction of the building that surrounds it.
Is shaft wall load bearing?
USG Shaft Wall Systems are non-load bearing gypsum wall partition assemblies constructed from outside the shaft at each floor. The assemblies are constructed of gypsum liner panels friction fitted to studs in a progressive manner, with gypsum panels, gypsum fiber panels or cement board applied to the face.
What is a 1 hour fire barrier?
In 1-hour fire partitions used as an exit corridors, and in a 1-hour smoke barrier, the code allows a 20- minute rated door with a vision panel tested without hose stream. The sidelites and transoms, however, must have a minimum fire protection rating of 45-minutes with hose stream.
What is the difference between a shaft and a chase?
Registered User. Dictionary definition: (a continuous recess: Harris) a vertical or horizontal enclosure/recess (of rated or non-rated construction) with which to conceal/route, plumbing, electrical, etc.; shafts tend to be vertical while chases may be either.
Are elevator shafts fire rated?
Fire Resistance Requirements For this reason, a shaft containing an elevator ordinarily needs to be fire resistance rated for one-hour when connecting less than four stories, and ordinarily requires a two-hour rating when connecting four or more stories.
Can you stack shaft walls?
Is it permitted to stack 1” shaftliner panels in a cavity shaft system? Yes, when the height of the assembly exceeds the length of a liner panel, then one liner panel is stacked on top of the other. No joint treatment or blocking is required at the horizontal panel butt joint.
What is a shaft wall ceiling?
Can shaft wall be load-bearing?