Common use of Basic Materials and Methods Clause in Contracts

Basic Materials and Methods. 5.5.5.1 Duct systems: All main ductwork shall be G-90 grade, galvanized sheet metal fabricated in accordance with SMACNA standards and shall have pressure classifications suitable for the static pressure of each system. Branch ducts to ceiling registers shall be insulated, flexible ductwork. Ductwork downstream of low velocity air units and all return and exhaust ducts shall be low velocity pressure class 1.