PRODUCTS USED
- 640 m (2,100’) of 150 mm (6”) N-12® HDPE Dual Wall Pipe
- 190 m (640’) of 300 mm (12”) N-12 HDPE Dual Wall Pipe
- 380 m (1,260’) of 450 mm (18”) N-12 HDPE Dual Wall Pipe
- 85 m (280’) of 525 mm (21”) N-12 HDPE Dual Wall Pipe
- 61 m (200’) of 750 mm (30”) N-12 HDPE Dual Wall Pipe
- 190 m (640’) of 900 mm (36”) N-12 HDPE Dual Wall Pipe
The yard would see constant forklift traffic to move the containers, which would also be stacked on the system. This traffic would project major live loads over the stormwater system.
SOLUTION
Advanced Drainage Systems’ N‑12 high‑density polyethylene (HDPE) pipe had undergone railway loading tests the previous year. Based on industry research, the pipe can be buried at depths up to 9.1 m (30 ft). These depths, based on the pipe’s strength and backfill compaction, would be fully compliant with the cover requirements for the intermodal yard.
Coco Paving, Inc., which had successfully used N‑12 pipe on prior infrastructure projects, recommended the HDPE system because it met all performance criteria. Its strength could withstand the significant live loads generated by forklifts and stacked containers, while its light weight allowed for faster, easier installation compared with traditional materials.
Installation of over 1,500 m (5,000’) took place in November, when temperatures in Brampton can be very cool. The HDPE pipe performed well under these conditions, as it does not become brittle or crack in low temperatures the way PVC pipe can.
PRODUCT DESCRIPTIONS
N‑12 is a high‑density polyethylene pipe manufactured by Advanced Drainage Systems, Inc., (ADS) for gravity‑flow storm drainage applications. N‑12, which is available in diameters from 100‑1,500 mm (4”‑60”), offers exceptional hydraulics and strength. N‑12 provides superior corrosion and abrasion resistance in a lightweight, corrugated design. A polyethylene bell minimizes joint distortion and eliminates chipping and cracking that is common to concrete bells. Available in 6 m (20’) lengths, N‑12 provides lower installation costs and faster installation than traditional materials. N‑12 can be utilized for storm drains, culverts, cross drains, ditch enclosures and retention/detention.
