Fats oils and grease are discharged from your upblast hood exhaust fan and collects on your roof.
Grease exhaust height above roof.
A listed grease collection system that is in accordance with section 510 9 1 4 and section 510 9 1 5.
Make sure the hood is level.
Roof deck to top of exhaust fan windband 40 min.
Location direction or nature of the exhaust.
Provide specifications and installation detail for the grease duct wrap.
Also since your business can be held responsible for polluted storm water systems and grease runoff rooftop grease containment is something you need to control.
National fire protection association nfpa standard 45 specifies a minimum stack height of 10 ft to protect rooftop work ers.
This creates a deadly fire hazard and liability for your business.
Threaded rods should be 1 2 closer to the back wall at the top hanger so as to pull the hood against the wall.
Standard z9 5 recommends a minimum stack height of 10 ft above the adjacent roof line an exhaust velocity v e of 3000 fpm and a stack height extending one stack diameter above any architectural screen.
Roof deck to top of curb 18 min.
One side is hinged with a flexible electrical connector for inspection and cleaning.
Install light bulbs supplied by others light globes and grease filters in the hood.
A listed grease duct in accordance with section 507 4 7 or ductwork in accordance with section 507 4 8.
In all areas exhaust vents should be at least 1 foot above roof surface.
Show how one side is hinged with a flexible electrical connector for inspection and cleaning.
Show the exhaust fan termination to be a minimum 40 inches above the roof.
A grease collection device that is applied to exhaust systems that does not inhibit the performance of a fan.
Exhaust vents must not be located where they might be obstructed by drifting snow consult local experience as to the height of snow drifts against buildings.
Ducts conveying explosive or flammable vapors fumes or dusts shall terminate not less than 30 feet 9144 mm from a property line 10 feet 3048 mm from openings into the building 6 feet 1829 mm from exterior walls or roofs 30 feet 9144 mm from combustible walls or openings into the building that are in the direction of the exhaust discharge and 10 feet 3048 mm above adjoining grade.
Exhaust collar and the roof curb cap must be welded to the exhaust duct.
How the exhaust fan termination to be a s minimum 40 above the roof.
Exhaust vents must be protected against rain and equipped with back flow prevention features e g flap dampers.
Provide a light test for grease duct prior to enclosing or concealing.
From all exhaust fans.
Ductwork installation by others 9.
