“Should” is used instead of “must” in these instances because some discretionary judgement is necessary. 4-1 HANGER ATTACHMENTS TO STRUCTURESStanding S joints cannot be used because notes on pages 1.34 and 1.63 limit their use to 36″ width. Sealants, moisture transfer methods and air leakage are also covered. The use of ties does not void the need to attach reinforcements to the duct wall, however, when ties occur outside the duct, as on two-sided or four-sided reinforcements at positive 4″ w.g. Its application for a specific project is contingent on a designer or other authority defining a specific use.
Correct adjustment of the timing devices is necessary to obtain a solid weld without burn-through.For the load from Table 1-14, select a pipe from Table 1-19 that has that load capacity and is within the length limit.Unless otherwise specified or allowed, rectangular ductwork shall be constructed in accordance with Tables 1-3 through l-13 and with details associated with them.FIG. per sq.
Lead radiation shielding is added in the appendix courtesy of the Lead Industries Association.Weight is based on 14.256 lb per square foot per inch of thickness (or 171.1 lb/cf). Longitudinal joints in duct the liner shall not occur except at the corners of ducts, unless the size of the duct and standard liner product dimensions make them necessary.Other construction that meets the functional criteria in Section VII or is as serviceable as that produced by the construction tables may be provided.CASING ASSEMBLY DETAILS SHOWN ARE NOT THE ONLY SATISFACTORY METHODS. Maximum support spacing for round flexible duct and connector was changed from 10’ to 5’ (1.5 meters).N.R. For purposes of distinction, openings in sections of straight ducts to receive taps of any connection method are not deemed to be fittings; but connection thereto may be specified by a prescribed method.Casings are normally set on a 4 to 6 inch high (102 to 152 mm) concrete curb to facilitate housekeeping and also to contain any water which may leak from the coils or eliminators. Also covers flashing, metal roofs, copings, gravel-stop fascia. Relieve pressure and record the dial indicator reading (D3).ASTM C 167—Thickness and Density of Blanket- or Batt-Type Thermal Insulating MaterialsFasteners designed to be secured with adhesives have a large base on which to apply the adhesive. from the finished floor; and if the service lines and ducts can be located above this line, shielding around them is obviously unnessary. Sleeves used for joining two sections of flexible duct shall be a minimum of 4" (102 mm) in length.3.6 Suspension Effects (Optional)EMT tie rods must per Table 1-18SM be 19.1 mm diameter for the 1800 m panels and 25.4 mm diameter for the 1300 mm panels (because of the lengths).
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