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IRC-1838 Indian River County <br />Main Library <br />Roof Replacement 22 10 00-3 Storm Drainage <br />11 gauge spun aluminum drain body, 17.5” diameter flange, cast aluminum clamping ring, <br />cast aluminum strainer, built-in vortex breaker providing more consistent flow, watertight <br />U-Flow seal and stem length and diameter as required by field conditions. Drain shall be <br />approved by roof system manufacturer. Contractor shall field verify drain diameter and <br />required stem length prior to ordering drains. <br /> EXECUTION <br />3.1 INSPECTION <br />A. A pre-job conference including the Engineer, Contractor, and the Owner’s representative <br />shall be conducted prior to the installation of roof drains and associated piping and <br />plumbing fixtures. <br />B. Contractor shall verify that conditions are acceptable to begin the installation. <br />C. Contractor shall be responsible for daily inspection of the plumbing installation to ensure <br />conditions remain satisfactory. <br />3.2 PREPARATION <br />A. The Contractor shall inspect all existing building components and conditions before <br />proceeding with plumbing installation. <br />B. Where decking is to be cut for new drains, the building interior shall be inspected for utilities, <br />structural members and occupancy conditions to ensure conditions are satisfactory to <br />proceed. <br />C. Where decking is cut to install new roof drains, minimum 2” x 2” x 1/8” steel angle shall be <br />installed on existing framing for additional deck support. <br />D. Where new piping is to be installed, the Contractor shall inspect the piping route and hanger <br />attachment points to ensure conditions are satisfactory to install piping and all associated <br />plumbing fixtures for the completed drainage system. <br />E. Route piping to maintain working spaces around electrical equipment by NEC. <br />F. Piping and fixtures shall not be routed to interfere with the service of in-place equipment <br />and systems. <br />G. Do not close off or obstruct streets, walks or other adjacent occupied facilities without <br />permission from Owner, Engineer, and Authorities Having Jurisdiction. <br />3.3 EXISTING ROOF DRAINS AND LEADERS <br />A. Prior to commencement of any work on the project the Contractor shall inspect each <br />existing roof drain for damage and water flow. <br />1. Each drain shall be cleaned of accumulated debris and loose gravel. Drain bowl <br />and drain outlet shall be cleaned of bitumen build-up to bare metal by hand <br />scraping. <br />2. A power vacuum shall be provided by the Contractor and utilized to vacuum debris, <br />loose gravel, and bitumen scrapping. Vacuum hose shall be of sufficient length to <br />reach the first elbow in the drain line in order to vacuum the line. <br />3. After cleaning bitumen from the drain bowl, Contractor shall inspect the bowl <br />carefully for cracks, and the drain pipe connection for possible deterioration. <br />4. Each drain shall be water tested for proper flow utilizing a minimum 3/4-inch hose. <br />Water shall flow into the line under maximum pressure available for a period of not