Attachment A - 2015-3-13_Samson Park Technical Specifications

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SAMSON OCEANFRONT PARK CITY OF SUNNY ISLES TECHNICAL SPECIFICATIONS IRRIGATION 02810-6 C. Pipe shall be delivered and stored on the job site with suitable protection against any damage to pipe and fittings. D. Trenches shall be made wide enough to allow a minimum of 6 inches between parallel pipelines. Parallel lines shall not be installed directly over one another. No lateral line shall be installed directly over another. No lateral line shall be installed in the main line trench. Trenches for pipelines shall be made of sufficient depths to provide the minimum cover from finish grade as follows: 1. 24 in. minimum cover over main lines and laterals routed under pavement. 2. 24 in. Minimum cover over main lines and 12" minimum cover over laterals. 3. 15 in. minimum cover over control wires from controllers to valves. 4. 24 in. minimum cover for pipe under vehicular use areas or roads. 5. Allow for sufficient width of excavating and working in trenches made in soft soil. E. The pipe and fittings shall be carefully inspected before installation of the trench. All rocks over 1 in. diameter and unsuitable bearing materials shall be removed from trench in strict accordance with the manufacturer's recommendations. 1. Solvent welded joints shall be made only on clean, dry, square cut, smooth pipe sections. Fittings shall be "dry" tested for proper size before solvent is applied. The assembly shall proceed in strict accordance with recommended procedures furnished by the manufacturer. 2. Solvent welded pipe sections shall be "snaked" from side to side in the trench to prevent joint rupture due to thermal contraction. 3. Pipe openings shall be plugged during construction to prevent entrance of foreign materials. F. Place pipe to be installed under roadways, sidewalks, walls, stairs or other hardscape areas, in SCH 40 PVC sleeve which had an inside diameter of not less than one inch larger than the outside of the pipe or the combined outside diameter of pipes installed. All sleeves shall be buried a minimum of 24" beneath all hardsurfaces and extend a minimum of 24" beyond hardsurface areas. Run irrigation piping and electrical conduit sleeves in same trench with a minimum of 6" separation. Irrigation Contractor shall coordinate with General Contractor so that installation of sleeves precedes hardsurface installation. G. Backfill shall be carefully placed to avoid pipe dislocation. Backfill material shall be free of rocks, stumps, roots and other unsuitable material. In planting areas, the top 6 in. shall be suitable planting soil. If existing fill is not suitable contractor shall use clean sand. Backfill shall be placed in 6 in. lifts and shall be thoroughly compacted, except in planting area where planting soil is used. Backfill under pavement or sidewalks shall be compacted to 98% of maximum AASHTO T 180 density. The surface of backfilled trenches shall be even with the surrounding ground surface. 3.03 SPRINKLER HEAD INSTALLATION: A. Contractor shall be responsible for the exact location of all sprinkler heads, acknowledging that the plans are schematic in nature. The Contractor shall accordingly place all sprinkler heads, adjust all nozzles, spray patterns, and make whatever other adjustments that may be required to give the landscaped areas full, complete, and proper coverage and distributions, and to meet all manufacturer's requirements. The Contractor shall make all such adjustments and additions solely at his/hers expense. B. Shrub spray sprinklers shall be installed on SCH 40 PVC risers as shown in the detailed drawings. Each sprinkler shall be installed within plant masses to be concealed from view. Shrub sprinklers shall be installed 12" away from adjacent curbs, sidewalks, fences, buildings, or edge of paving for protection.