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Complete Compiled Specification.pdf - Peck Ormsby Construction

Complete Compiled Specification.pdf - Peck Ormsby Construction

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Where ducts pierce roof construction, the flashing shall be provided as part of Division 7.<br />

The equipment bases and duct opening bases on the roof shall be constructed by this Contractor as shown<br />

on the drawings. The base shall be constructed to fit the equipment approved for construction. This<br />

Contractor shall construct and install a weatherproof inverted pan over the wood bases to act as a<br />

counterflashing and weatherproof hood for the base. All openings through the pan for equipment mounting<br />

shall be sealed weathertight with lead washers.<br />

TEST HOLES IN DUCTWORK:<br />

Test holes for testing air quantities in ducts shall be installed at locations to be specified by the Balancing<br />

Contractor. Rubber stoppers shall be provided for closing the test holes. Where these holes are installed in<br />

insulated ductwork, a removable plug of approved insulation material shall be provided. An instrument port<br />

shall be provided in the following locations for each fan system.<br />

Return air shaft and/or duct upstream of sound traps<br />

Return air fan plenum<br />

Main return air duct upstream of fresh air dampers<br />

Mixed air plenum<br />

Supply fan plenum<br />

Additional ports are to be installed in locations determined by the Owner's representative.<br />

Instrument ports shall be die cast with screwed cover for the insulation thickness specified. Ports shall be<br />

located outside of the plenum with 20-gauge sheet metal sleeve of the same size as the port opening,<br />

passing through insulation where ducts have interior insulation.<br />

CLEANOUT OPENINGS:<br />

Duct systems shall have cleanout openings equipped with tight fitting sheet metal doors. Doors shall be<br />

tightly latched without the use of tools.<br />

FIRE-RESISTIVE ACCESS OPENING:<br />

When cleanout openings are located in ducts within a fire-resistive shaft or enclosure, access openings shall<br />

be provided in the shaft or enclosure at each cleanout point.<br />

These access openings shall be equipped with tight-fitting sliding or hinged doors which are equal in<br />

fire-resistive protection to that of the shaft or enclosure.<br />

CLEARANCES:<br />

-<br />

___________________________________________________________________________________<br />

____________<br />

SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION March 2, 2009<br />

AIR DISTRIBUTION 15800 - 3

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