PRODUCTS USED
- 55 m (180‘) of 300 mm (12”) N-12 HDPE Dual Wall Pipe
- 6 m (20’) of 375 mm (15”) N-12 HDPE Dual Wall Pipe
- 12 m (40’) of 450 mm (18”) N-12 HDPE Dual Wall Pipe
- 6 m (20’) of 525 mm (21”) N-12 HDPE Dual Wall Pipe
- 330 m (1,080’) of 600 mm (24”) N-12 HDPE Dual Wall Pipe
- 104 m (340’) of 750 mm (30”) N-12 HDPE Dual Wall Pipe
- 30 m (100’) of 900 mm (36”) N-12 HDPE Dual Wall Pipe
CHALLENGE
The roundabout addressed congestion caused by vehicles exiting the highway and turning left onto Mapleton Road. The left-turning vehicles resulted in traffic backing up onto the highway creating unsafe conditions. In order to create the roundabout, new stormwater drainage was needed in the area.
SOLUTION
N-12 Dual Wall pipe is listed in the City of Moncton’s stormwater drainage specifications, enabling ADS representatives to flip the design from reinforced concrete pipe (RCP) to N-12. Using ADS’ Pipe Value Tool, ADS demonstrated the total installed cost savings of N-12, manufactured from high-density polyethylene (HDPE), compared to RCP.
By installing 543 m (1,780’) of N-12 pipe, the contractor benefited from savings on the total cost of installation. The lightweight pipe also allowed for faster installation, easier onsite storage and a 59 percent reduction in the number of joints required for the project.
The large diameter N-12 pipe was used for the main lines, with smaller diameters serving as laterals. The main lines tied into existing storm sewer infrastructure at multiple manholes, with one 30-inch Mar Mac® coupler used to connect the N-12 pipe to an existing storm sewer line.
PRODUCT DESCRIPTIONS
N-12 has a corrugated exterior and smooth interior wall that provide exceptional hydraulics, strength and corrosion resistance. N-12 is available in 100-1500 mm (4”-60”) diameters and in 6 m (20’) lengths to provide faster installation and lower installation costs. The integrated inline bell design allows for easy installation and eliminates chipping and cracking that is common to concrete bells. N-12 addresses subsurface and stormwater gravity-flow drainage needs.
