5.3. SR 11-03-2008 - Laserfiche WebLink

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Irrigation: A. Polyvinyl-Chloride Pipe (PVC): 1. Pipe shall be polyvinyl chloride (PVC) pipe (Class 160) with a minimum working pressure of 160 psi. PVC pipe shall be continuously and permanently marked with manufacturer's name, material, and schedule or type. 2. Pipe shall meet the requirements of ASTM D2241 and D2672, latest revision. Materials shall meet the requirements of ASTM D1784, latest revision. B. Pipe Fittings for PVC Pipe: Pipe fittings for 3" diameter and less shall be constructed of Schedule 40 PVC and shall be joined to pipe by solvent welding. C. Swing Joint Assemblies: Swing joints shall be Spears preassembled PVC swing join or approved equal. D. Sleeving: Sleeving shall be PVC pipe sized to accommodate irrigation pipe and control wire. E. Electric Remote Control Valves: Valves used in the electrically controlled automatic system shall be Hunter ICV Series, as noted on the Drawings. Valves shall be sized as shown and noted on the Drawings and shall be installed in valve boxes of appropriate size and type as described under valve boxes. 1. 1-1/2" Globe Valve, with Filter Sentry and Accu-set, pressure regulator: Hunter ICV-151 G- FS-AS. F. Valve Boxes for Electric Remote Control Valves: Valve boxes shall be plastic as manufactured by Carson and shall be minimum 12 inches or jumbo size with locking lid. Valve box shall be of a size that provides adequate space for valve repairs. Valve boxes shall be place on a bed of gravel sized 6 inches larger than box perimeter with a depth not less than 12 inches. Gravel must be placed prior to the placement of the valve box. A. Heads: 1. Sprinkler heads shall be the following series as manufactured by the Hunter Company or approved equal 2. Type and location of heads are keyed and shown on the Drawings. Nozzles shall be selected based on providing head to head coverage and spacing as shown on the drawings. a. Rotors: 1) Hunter I-20 Ultra Rotor, adjustable with check valve and stainless steel riser: I- 20-ADS-3.0 2) Hunter I-20 Ultra Rotor, low-angle nozzle, adjustable with check valve and stainless steel riser: I-20-ADS-3.5 LA b. Sprays: 1) Hunter Institutional Spray including factory installed pressure regulator, adjustable with drain check valve. Refer to plan spacing for nozzles. Heads against building shall be 0° trajectory. Sodding: A. Sod: Sod shall be in accordance with Mn/DOT 3878, and shall be as follows: 1. Class of Sod: Sod shall be nursery grown, cultured sod planted on cultivated agricultural land and grown specifically for sod purposes. Sod shall have been mowed regularly and carefully and otherwise maintained from planting to harvest to maintain reasonable quality and uniformity. 2. Composition: Sod shall be composed of not less than 60 percent Kentucky Bluegrass. 3. Mowing Height: Before stripping, sod shall be mowed uniformly at a height of 1 inch to 2 % inches. 4. Thatch: Sod shall be relatively free of thatch, up to '/z-inch allowable (uncompressed). 5. Diseases, Nematodes, and Insects: Sod shall be reasonably free of diseases, nematodes, and soil-borne insects. 6. Weeds: Sod shall be free of objectionable grassy and broad leaf weeds.