Specifications include, but are not limited to: demolition, HAZMAT remediation, seismic upgrades, and new installation of the exterior wall system.; removal of the existing exterior finishes on the south and west sides of the building, structural upgrades to the underlying metal stud framing, and then installation of the new exterior wall system complete with flashings and trim.; COLD-FORMED METAL FRAMING: A. Cold-formed steel framing may be shop or field fabricated for installation, or it may be field assembled.; B. Install cold-formed steel framing according to AISI S200 and to manufacturer's written instructions unless more stringent requirements are indicated.; C. Install shop- or field-fabricated, cold-formed framing and securely anchor to supporting structure.; D. Install cold-formed steel framing and accessories plumb, square, and true to line, and with connections securely fastened.; 1. Cut framing members by sawing or shearing; do not torch cut.; 2. Fasten cold-formed steel framing members by screw fastening.; a. Locate mechanical fasteners and install according to Shop Drawings, and complying with requirements for spacing, edge distances, and screw penetration.; E. Install framing members in one-piece lengths unless splice connections are indicated for track or tension members. ; AIR BARRIERS: A. Install materials in accordance with manufacturer's installation instructions.; B. Air Barriers: Install continuous airtight barrier over surfaces indicated, with sealed seams and with sealed joints to adjacent surfaces.; C. Apply sealants and adhesives within recommended temperature range in accordance with manufacturer's installation instructions.; D. Self-Adhered Sheets: 1. Prepare substrate in accordance with sheet manufacturer's installation instructions; fill and tape joints in substrate and between dissimilar materials.; 2. Lap sheets shingle fashion to shed water and seal laps airtight.; 3. Once sheets are in place, press firmly into substrate with resilient hand roller; ensure that laps are firmly adhered with no gaps or fishmouths.; 4. Use same material, or other material approved by sheet manufacturer, to seal to adjacent substrates, and as flashing.; 5. At wide joints, provide extra flexible membrane allowing joint movement.; E. Openings and Penetrations in Exterior Air Barriers: 1. At all existing windows and louver openings, seal air barriers to existing window systems as indicated on the drawings.; 2. Install flashings as indicated on the Drawings, and in compliance with the following requirements.; 3. At openings with frames having nailing flanges, seal head and jamb flanges using a continuous bead of sealant compressed by flange and cover flanges with sealing tape at least 4 inches wide; do not seal sill flange.; JOINT SEALANTS: A. Perform work in accordance with sealant manufacturer's requirements for preparation of surfaces and material installation instructions.; B. Perform installation in accordance with ASTM C1193.; C. Install bond breaker backing tape where backer rod cannot be used.; D. Install sealant free of air pockets, foreign embedded matter, ridges, and sags, and without getting sealant on adjacent surfaces.; E. Do not install sealant when ambient temperature is outside manufacturer's recommended temperature range, or will be outside that range during the entire curing period, unless manufacturer's approval is obtained and instructions are followed.; F. Nonsag Sealants: Tool surface concave, unless otherwise indicated; remove masking tape immediately after tooling sealant surface.
