Metal duct roof penetration










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Failure to do so will compromise seal effectiveness. Corrosion resistance is an important characteristic of both in-slab and under-slab ducts. Welded studs may be installed using special welding equipment. Ducts shall be suspended in accordance with Section IV. Internal ties shall be one of the methods shown in Figures and Furthermore, compliance of any such item with standards published or recognized by SMACNA is not indicated by presence of the logo. Other construction that meets the functional criteria in Section VII or is as serviceable as that produced by the construction tables may be provided.

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Detailed Roof Coating Penetration Instructions

The Figure B manifold shall be 6" mm diameter pipe minimum. The support systems are not qualified for supplemental loads either. On size change fittings, the greater fitting dimension determines the duct gage. Applicable for positive and negative pressures. There are several proprietary duct connection systems available and in use. Flashings and Copings 9.

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How do i seal through the roof duct penetrations

The use of components not precisely identical to these is acceptable. The type of pin that is applied before duct liner installation takes a spring-clip or washer. SMACNA has conducted testing and analysis of galvanized steel ducts of gages up to 96" in size, between 28 0. Sheet material shall be alloy H14 unless otherwise specified. Pipe Penetration with Wood Curb This detail shows a penetration with a wood curb.

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Description: It was observed that in general, cross breaking was not beneficial to high velocity duct performances. In all cases, the upper attachments to the decking should be in place before the application of fireproofing materials. Unless otherwise specified or allowed, rectangular ductwork shall be constructed in accordance with Tables through l and with details associated with them. Lead is useful, especially where neutron and gamma rays are concerend, in that it does not itself become contaminated and emit harmful rays. Petersburg, FL Bill R. It can also be made with longitudinal seams. An alphabet letter in the table means that reinforcement angles or their equivalent must be used at the meter interval following the letter. The constant pressure runs were made at Report Leakage Classes as in Leakage Evaluation. These installation provisions were prepared for round ducts. however, they may also be usable for flexible flat oval ducts.
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