Method Statement For Installation of Pre Fabricated HVAC Ducts. Installation Requirements for HVAC Ducts. Pre Requirements before the start of installation of air conditioning ducts which are already fabricated either on the site workshop or from outside the project premises and delivered to the site for installation after duct fabrication. Fabricated Ducts delivered from duct workshop to be stored in dry- clean and safe area to be selected on site. Some flexible duct markets prefer to avoid using flexible duct on the return air portions of HVAC systems, however flexible duct can tolerate moderate negative pressures. The UL181 test requires a. All materials and documentation relevant to a particular section of works will be checked by the construction manager prior to the commencement of work ensuring that these are of the correct type as reviewed by the client. Before commencement any construction works, pre- inspections will be carried out on all materials prior to them leaving the storage area i. Clean both flange faces to be joined. Add gasket jointing material to flanges to be mated. Using only undamaged rust free bolts nuts and washers join mating flanges together and tighten bolts. Clean any excess jointing material from flanges. In line equipment is to be independently supported from main structure and not block work walls or sub- structure. Silencers, fire dampers, balancing dampers & other plant items will be installed as per shop drawings, and will be supported adequately. Supervisor to check before end of work every day that: The correct type of supports are installed, supports are adequately supporting the ductwork and associated plant equipment. Ensure terminal equipment is installed as specified. SMACNA’s HVAC Contractors Council develops programs, services and products that help members compete effectively in the HVAC duct fabrication, installation and building life cycle markets. Related issues include: Building Information Modeling (BIM), LEAN. Improving Firestopping for HVAC Duct Penetrations in Fire-Rated Walls By James Stahl Jr. Firestopping non-dampered heating, ventilation, and air-conditioning. After the HVAC Duct Installation. Supervisor to ensure that all completed installations look neat and tidy, and that there is adequate spacing between ductwork and in line equipment allowing access for operation and ease of maintenance, to approved drawings and manufacture.
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December 2016
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