Mechanical Plan Review

Review Plan Package Use Group/Occupancy Correct Code Reference/Conformance Revisions Mechanical Plans/Spec Books Structural Plans Site Plans Fire Suppression (Comm/Ind)

Use Group / Occupancy

Restaurants and Lounges: Duct work – both HVAC & kitchen exhaust Equipment approval – fans and Mau units Gas piping layout – sizing, location, plenum Exhaust balance sheet – 10 degree >, 50% OA Cooking equipment location – fryers all under hood Grease duct elevation shown – Clearances and Compliance Combustion air compliance?

Use Group/Occupancy Offices: Duct layout – flex in accessible area? Return air plenum? Gas piping layout, sizes Equipment specs – R.A. smoke detect, outside air, economizer Access to roof? Equipment clearances – combustion air Fire ratings maintain? Ventilation? Provided, proper size toilet fans? Mix use R.A.

Use Group/Occupancy Industrial: Equipment listed? Install to listing? Gas pipe layout Ventilation – NFPA 91 – Chap 11 – Uniform Boiler and refrigeration rooms to compliance

Use Group/Occupancy Miscellaneous: Spray booths, auto service Dry cleaners High hazard – explosion relief

Correct Code Reference/Conformance

Commercial Plans Dependant on Occupancy Use Ventilation air and exhaust systems Roof-top equipment requirements Ceiling air plenums Fire suppression requirements Smoke detection Duct system and construction Fuel gas piping Fire resistance ratings and dampers Storage areas

Revisions

Common Mechanical Plan Review Comments M1: Provide details of materials and methods used to provide protection of fire resistance rated assembly penetrations M2: Indicate required clearances from combustibles M3: Rooftop appliances within 10 ft. of a roof edge require a guard M4: Provide a 125v GFI protected rooftop outlet within 25 ft. of a rooftop unit

Common Mechanical Plan Review Comments M5: Submit a ventilation schedule for all rooms and spaces M6: Verify air is not being re-circulated between dissimilar occupancies M7: Provide a duct smoke detector in the air handling system M8: Submit details of the kitchen exhaust and hood system

Common Mechanical Plan Review Comments M9: Remove mechanical pipes and ductwork from the elevator shaft M10: Remove fuel fired appliance from the ceiling plenum M11: Provide combustion and dilution air calculations

Common Mechanical Plan Review Comments M12: Indicate that motorized louvers are interlocked with mechanical equipment M13: Provide details on clothes dryer exhaust systems

Mechanical Plans / Spec Books

Exhaust Exhaust provides reasonable protection from hazards that involve materials and/or gases, which are flammable, explosive, toxic or otherwise hazardous

Exhaust What must be exhausted Byproducts of machines, vats, tanks, furnaces, forges, salamanders and devices which produce or throw off dust or particles that float in the air or which emit heat, odors, fumes, spray, gas or smoke in enough quantity to be irritating or injurious Fuel dispensing areas Equipment and service rooms Spray-painting and dipping rooms

Exhaust Motion picture projectors Dry-cleaning rooms LP gas distribution facilities Hazardous materials storage Public garages Cloths dryers Kitchens Specific rooms

Exhaust for Kitchens Exhaust must be designed to handle grease Fans are steel or listed alternate for cooking Fan motors are outside of exhaust air stream Fan blows upward Ducts no less than 16 ga steel or 18 ga stainless steel

Exhaust for Kitchens Duct joints welded or brazed (no screws) Non-combustible supports (no screws) Prevention of grease accumulation Duct clearances Make-up air equal to exhaust Tempered to within 10F of room temp

Site Plans

Fire Suppression (Commercial/Industrial)