Laserfiche WebLink
IRRIGATION <br />Section 02810 <br />Project 15-1207 <br />2. Lateral line: twelve inches (12") cover for spray heads, and eighteen inches (18") <br />cover for rotor heads. <br />3. Sub -surface inline drip tubing: five inches (5") cover. <br />E. Conflicts with other trades: <br />Hand -excavate trenches where potential conflict with other underground utilities <br />exist. <br />2. Where other utilities interfere with irrigation trenching and piping work, adjust the <br />trench depth as instructed by Owner's Representative. <br />3.08 BACKFILL AND COMPACTING <br />A. General: Do not begin until hydrostatic tests are completed. When system is operating <br />and after required tests and inspections have been made, backfill trenches under paving <br />areas to the compaction rate specified in Section 02200 — EARTHWORK. <br />B. Place backfill in six-inch (6") layers and compact with an acceptable mechanical <br />compactor. <br />Compact backfill material in landscape areas to eighty-five percent (85%) <br />maximum dry density of the soil. <br />2. If settlement occurs along trenches, make adjustments in pipes, valves, and <br />sprinkler heads, soil, sod or paving as necessary to bring the system, soil, sod <br />or paving to the proper level or the permanent grade, without additional cost to <br />the Owner. <br />C. Excess Soil: Remove all rocks, debris, and excess soil that results from sprinkler <br />irrigation trenching operations, landscape planting, and soil preparation operations off <br />site at no additional cost to the Owner. If soil meets topsoil requirements in Section <br />02200 — EARTHWORK, it may be used for finish grading. <br />D. Finishing: Dress -off areas to eliminate construction scars. <br />3.09 TWO WIRE CABLE <br />A. General: Install control wires beneath sprinkler main line whenever possible; <br />B. Slack Cable: Provide eighteen inches (18") of slack cable for each wire connected to <br />automatic control valve. Slack cable shall be coiled and left in the valve box. <br />C. Expansion and Contraction: Snake cable in trench to allow for contraction of cable. <br />D. Cable Passing Under Existing or Future Paving or Construction: Encase in PVC <br />Schedule 40 or galvanized steel conduit extending at least twelve inches (12") beyond <br />edges of paving or construction. <br />9 <br />