Laminated Wood Arch Jacking and Section Replacement

The Problem

Water penetration created deterioration of the wood and laminations near the bearing of the arches. Fifteen 9” x 31 ½” arch ends were replaced with steel section over an approximate 4 foot length.

The Solution

Implement a jacking solution, integral to the repair that replaces the bearing end of the wood arch. A vertical tie-down was first installed using helical piers, a cast concrete transfer beam and a steel tube stock column. The jacking struts were installed and jacking forces of approximately 5 kips were applied to the axis of the arch. After jacking, the connection pin was removed and the deteriorated wood section was cut out. A steel tube assembly was installed as the replacement section.