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Complete Compiled Specification.pdf - Peck Ormsby Construction

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2.7 DRAINAGE CONDUITS<br />

A. Molded-Sheet Drainage Conduits: Prefabricated geocomposite with cuspated, molded-plastic<br />

drainage core wrapped in geotextile filter fabric.<br />

1. Nominal Size: 12 inches (305 mm) high by approximately 1 inch (25 mm) thick.<br />

a. Minimum In-Plane Flow: 30 gpm (114 L/min.) at hydraulic gradient of 1.0 when<br />

tested according to ASTM D 4716.<br />

2. Nominal Size: 18 inches (457 mm) high by approximately 1 inch (25 mm) thick.<br />

a. Minimum In-Plane Flow: 45 gpm (170 L/min.) at hydraulic gradient of 1.0 when<br />

tested according to ASTM D 4716.<br />

3. Filter Fabric: PP geotextile.<br />

4. Fittings: HDPE with combination NPS 4 and NPS 6 (DN 100 and DN 150) outlet<br />

connection.<br />

B. Multipipe Drainage Conduits: Prefabricated geocomposite with interconnected, corrugated,<br />

perforated-pipe core molded from HDPE complying with ASTM D 1248 and wrapped in<br />

geotextile filter fabric.<br />

1. Nominal Size: 6 inches (152 mm) high by approximately 1-1/4 inches (31 mm) thick.<br />

a. Minimum In-Plane Flow: 15 gpm (57 L/min.) at hydraulic gradient of 1.0 when<br />

tested according to ASTM D 4716.<br />

2. Nominal Size: 12 inches (305 mm) high by approximately 1-1/4 inches (31 mm) thick.<br />

a. Minimum In-Plane Flow: 30 gpm (114 L/min.) at hydraulic gradient of 1.0 when<br />

tested according to ASTM D 4716.<br />

3. Nominal Size: 18 inches (457 mm) high by approximately 1-1/4 inches (31 mm) thick.<br />

a. Minimum In-Plane Flow: 45 gpm (170 L/min.) at hydraulic gradient of 1.0 when<br />

tested according to ASTM D 4716.<br />

4. Filter Fabric: Nonwoven, needle-punched geotextile.<br />

5. Fittings: HDPE with combination NPS 4 and NPS 6 (DN 100 and DN 150) outlet<br />

connection.<br />

6. Couplings: HDPE.<br />

C. Single-Pipe Drainage Conduits: Prefabricated geocomposite with perforated corrugated core<br />

molded from HDPE complying with ASTM D 3350 and wrapped in geotextile filter fabric.<br />

1. Nominal Size: 12 inches (305 mm) high by approximately 1 inch (25 mm) thick.<br />

a. Minimum In-Plane Flow: 30 gpm (114 L/min.) at hydraulic gradient of 1.0 when<br />

tested according to ASTM D 4716.<br />

2. Nominal Size: 18 inches (457 mm) high by approximately 1 inch (25 mm) thick.<br />

a. Minimum In-Plane Flow: 45 gpm (170 L/min.) at hydraulic gradient of 1.0 when<br />

tested according to ASTM D 4716.<br />

SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION<br />

SUBDRAINAGE<br />

MARCH 2, 2009<br />

02010 - 4

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