Mechanical Hood and Duct
|Commercial Application Form
This form must be completed and submitted to apply for a mechanical permit.
Provide a copy of the manufacturer's specifications noting the make, model, weight, and efficiency rating of each unit.
Provide a written description of all work to be done. Show the location of all fixtures, existing and proposed, and identify the fixture type. Identify the use of each room. Show all equipment, duct and diffuser locations, and identify each zone. Note duct sizes and any penetrations through fire-resistive assemblies or
protected areas. Locate all fire and/or smoke dampers if required.
|Hood Design Drawings
Identify hood sizes, shaft sizes, shaft rating, air flow calculations, hood classification, separation between makeup and fresh air. Include the following views: plan, elevation, front, and wall details, and locations.
|One Hour-Rated Shaft Detail
Include name of testing agency and listing number.
The site plan must include a north arrow; building footprint, fire hydrants; access roads and parking; dimensions od all accessible parking and access aisles.
Suppression plans for mechanical hood & duct are not due at the time of submittal, but are a separate hood suppression permit from the Fire Prevention Bureau which requires these items listed: size of supply bottle, diagram of piping, nozzle fixture units and nozzle cutsheets, and manual shut-off location. Fire suppression design in accordance with nationally recognized standards.
Provide structural calculations for all structural members supporting equipment greater than 350 lbs. each. List remote area, occupancy and hazard type, assumptions used, square footage calculated, number of heads, code or standard used. VIAQ calculations required for mechanical.