Specifications include, but are not limited to: The project includes the demolition of the existing courtyard including hardscape and softscape areas, the New courtyard construction as well as some minor renovations including a new sliding door leading to the main lobby connecting the courtyard as well as a new metal stair leading to the lower courtyard (adjacent to the main courtyard); METAL STAIRS: 1. Exterior architectural steel stairs with perforated treads and risers for communicating stair between courtyard and lower level seating area.; A. Metal Surfaces, General: Provide materials with smooth, flat surfaces unless otherwise indicated. For components exposed to view in the completed Work, provide materials without seam marks, roller marks, rolled trade names, or blemishes.; B. Recycled Content of Steel Products: Postconsumer recycled content plus one-half of preconsumer recycled content not less than 25 percent.; C. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.; D. Uncoated, Cold-Rolled Steel Sheet: ASTM A 1008/A 1008M, either commercial steel, Type B, or structural steel, Grade 25, unless another grade is required by design loads; exposed.; INSTALLING METAL STAIRS: A. Fastening to In-Place Construction: Provide anchorage devices and fasteners where necessary for securing metal stairs to in-place construction. Include threaded fasteners for concrete and masonry inserts, through-bolts, lag bolts, and other connectors.; B. Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required for installing metal stairs. Set units accurately in location, alignment, and elevation, measured from established lines and levels and free of rack.; C. Provide temporary bracing or anchors in formwork for items that are to be built into concrete, masonry, or similar construction.; D. Fit exposed connections accurately together to form hairline joints. Weld connections that are not to be left as exposed joints but cannot be shop welded because of shipping size limitations.; E. Field Welding: Comply with requirements for welding in "Fabrication, General" Article.; F. Install aggregate surfacing on treads and platform in accordance with manufacturer's instructions to produce slip resistant surface.; SLIDING AUTOMATIC ENTRANCES: 1.1 Exterior and interior sliding automatic entrances.; A. Do not install damaged components. Fit frame joints to produce hairline joints free of burrs and distortion. Rigidly secure non-movement joints.; B. Entrances: Install automatic entrances plumb and true in alignment with established lines and grades without warp or rack of framing members and doors. Anchor securely in place.; 3.2.B.1 Install surface mounted hardware using concealed fasteners to greatest extent possible.; 3.2.B.2 Set headers, carrier assemblies, tracks, operating brackets and guides level and true to location with anchorage for permanent support.; C. Door Operators: Connect door operators to electrical power distribution system as specified in Division 26 Sections.; D. Glazing: Glaze sliding automatic entrance door panels in accordance with the Glass Association of North America (GANA) Glazing Manual, published recommendations of glass product manufacturer, and published instructions of automatic entrance system manufacturer.; E. Sealants: Comply with requirements specified in division 7 Section “Joint Sealants” to provide a weather tight installation.; 3.2.E.1 Set thresholds, bottom guide and track systems and framing members in full bed of sealant.; 3.2.E.2 Seal perimeter of framing members with sealant.
