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be used or would not be sufficiently weatherproof and waterproof, form expansion joints of <br /> intermeshing hooked flanges, not less than 1 inch (25 mm) deep, filled with mastic sealant <br /> (concealed within joints). <br /> 3.03 SEAMS <br /> A. Fabricate nonmoving horizontal seams in sheet metal with flat-lock seams, or as otherwise <br /> indicated in the drawings. Tin edges to be seamed, form seams and solder seam. The soldered <br /> joints on curb caps and roof jacks shall be cleaned with vinegar, wiped clean and sealed with 1- <br /> part urethane caulking or high velocity duct sealant. <br /> B. Two-piece galvanized jacks, i.e., sealer pans and cone jacks shall be joined with an inside slip <br /> pocket joint and soldered in the field. <br /> C. Sealed Joints: Form non-expansion, but movable,joints in metal to accommodate elastomeric <br /> sealant to comply with SMACNA standards. Fill joint with sealant and form metal to completely <br /> conceal sealant. <br /> D. Use joint adhesive for nonmoving joints specified not to be soldered. <br /> E. Separations: Separate metal from incompatible metal or corrosive substrates by coating <br /> concealed surfaces, at locations of contact, with asphalt mastic or other permanent separation <br /> as recommended by manufacturer. <br /> 1. Underlayment: Where installing aluminum directly on cementitious or wood substrates, <br /> install a slip sheet of red-rosin paper and a course of polyethylene underlayment. <br /> 3.04 SOLDERED JOINTS <br /> A. All surfaces to be soldered shall be thoroughly cleaned with flux or mechanically cleaned where <br /> surfaces have oxidized. To remove oxidized surface, contractor shall use emery cloth, wire <br /> wheel or wire brush. DO NOT USE SANDPAPER. <br /> B. Pretin edges of sheets to be soldered to a width of 1-1/2 inches (38 mm), except where <br /> pretinned surface would show in finished Work. Contractor shall use the appropriate flux and <br /> solder as specified in the "Products" section of this specification for tinning and soldering. <br /> C. Do not solder the following metal: Aluminum <br /> D. Do not use torches for soldering. Heat surfaces to receive solder and flow solder into joint. Fill <br /> joint completely. Completely remove flux and spatter from exposed surfaces. <br /> E. When joining two pieces of metal with a lap joint, contractor shall tin surfaces on both sides at <br /> least 1-1/2" (Gutter laps shall be tinned a minimum of 2-1/2"). Install rivets (as specified) in two <br /> rows, not more than 2 inches apart in a staggered fashion. <br /> 3.05 PRE-PAINTED METAL <br /> A. Color as selected by the owner. <br /> B. Metal shall be cut, formed, or riveted using hand or power tools. <br /> C. Fabricate and install in accordance with drawings and specifications using recognized sheet <br /> metal practices. <br /> D. Keep cutting edges sharp, clean, properly dressed, and closely aligned. Exercise care during <br /> fabrication and erection to avoid damage. <br /> E. Use color matched touch-up paint and rivets where required. <br /> F. Coating must be mechanically removed if soldering is necessary. <br /> G. All fabrication and installation shall be accomplished with the strippable film in place. <br /> H. After installation is complete, IMMEDIATELY REMOVE STRIPPABLE FILM. Extended <br /> exposure of strippable film to ultraviolet light may damage paint coating underneath. <br /> SEA00511 / Prologis - SEA00511 07 6210 - 5 Sheet Metal Flashing and Trim <br /> - FY24- Everett 1 - Capital <br /> Roofing Project <br />