Specifications include, but are not limited to: 2.1 PERFORMANCE REQUIREMENTS A. Structural Performance: Hangers and supports for HVAC piping and equipment shall withstand the effects of gravity loads and stresses within limits and under conditions indicated according to ASCE/SEI 7. 1. Design supports for multiple pipes, including pipe stands, capable of supporting combined weight of supported systems, system contents, and test water. 2. Design equipment supports capable of supporting combined operating weight of supported equipment and connected systems and components. 2.2 METAL PIPE HANGERS AND SUPPORTS A. Stainless Steel Pipe Hangers and Supports: 1. Description: MSS SP-58, Types 1 through 58, factory-fabricated components. 2. Padded Hangers: Hanger with fiberglass or other pipe insulation pad or cushion to support bearing surface of piping. 3. Hanger Rods: Continuous-thread rod, nuts, and washer made of stainless steel. 2.3 THERMAL-HANGER SHIELD INSERTS A. Insulation-Insert Material for Cold Piping: ASTM C552, Type II cellular glass with 100-psi or] ASTM C591, Type VI, Grade 1 polyisocyanurate with 125-psi minimum compressive strength and vapor barrier. B. For Trapeze or Clamped Systems: Insert and shield shall cover entire circumference of pipe. C. For Clevis or Band Hangers: Insert and shield shall cover lower 180 degrees of pipe. D. Insert Length: Extend 2 inches beyond sheet metal shield for piping operating below ambient air temperature.