Vent shown in image features a pv 24 c06 277 00 a large pop vent.
Gravity roof vent for elevator shaft.
The rational for having venting originally according to the code commentary was that most fire deaths occur due to smoke which could rise up the elevator shaft.
Ul listed this gravity roof vent is rated to withstand wind pressures of over 50 psf which is equivalent to wind speeds exceeding 200 mph.
The vents in the side of the hoistway enclosure below the elevator machine room floor or in the roof of the hoistway shall open either directly to the outer air or through noncombustible ducts to the outer air.
Low profile gravity roof vents feature corrosion resistant weather resistant rigid aluminum construction and include integral bird screens.
Gravity ventilators are designed to provide relief exhaust and intake supply airflow for a number of commercial and light industrial applications.
Lsug units are available in 7 sizes from 24 to 60 inches.
Engineered and certified for both flat roof ventilation and steep slope ventilation the aura gravity ventilator is available for both residential and commercial buildings.
Size 4 5 6 7 8 9 10 12 14 15 16 18 20 24 30 a dia.
Depending on the architecture of the building roof these vents were sometimes hard to hide.
A built in curb cap offers prepunched holes to help provide for easy attachment to the roof curb.
3004 5 1 vents in the hoistway enclosures.
Gravity ventilators gravity intake and relief ventilators for use in non powered applications.
Gravity relief and intake vent.
Lsug units include damper doors and a high volume rain gutter to prevent water infiltration.
Hoistways of elevators and dumbwaiters penetrating more than three.
Hoistway enclosures may be vented in accordance with the following.
Pul air ventilators are an economical choice where gravity or relief ventilation is required on industrial or commercial buildings.
2009 ibc 3004 1 hoistway venting required.
According to code elevator shafts hoistways meeting certain requirements must be adequately ventilated.
The pul air is available in galvanized steel aluminum stainless steel or copper construction.
The gravity intake and relief ventilators are non powered do not have a fan and work on pressure differential between the inside and outside of the building.
Lsug is a low silhouette gravity relief upblast ventilator designed for use on vertical high velocity exhaust systems.
Given an elevator shaft serving four 4 stories with three 3 floor ceiling penetrations question is a smoke vent required at the top of the elevator shaft.
