- Sep 11, 2014
The old Craigflower wood trestle bridge was 80 years old and at the end of its service-life. Piles were rotting and some structural members had cracked showing signs of excessive loading fatigue. The original structure was designed for truck weights that were half the weight of today’s vehicles. The narrow sidewalks did not accommodate for today’s pedestrian travel including wheelchair mobility for passing a person with a baby stroller or a cyclist.
The new 3-lane bridge was designed to include a service-life of 75 years, today’s vehicle and pedestrian demands and regulations, as well as to remain usable in the event following a major earthquake. The bridge utilized epoxy-coated reinforcing steel in both the deck structure, and in the upgraded two-metre sidewalks on both sides of the bridge. These bridge sidewalks were increased in size to accommodate bike lanes, and fishing on the bridge. Epoxy-coated reinforcing steel was also utilized in the storm-water treatment area and road approaches.