A 1.1 mile span of elevated highway, which connects to the actual bridge, is of major importance to the vitality of downtown San Francisco. Approximately 246,000 vehicles use the approaches on a daily basis, due to this heavy volume of traffic, engineers pinpointed it as a major problem area. The strategy for strengthening the elevated approaches is to add deeper pilings, larger foundations, and stronger support columns.

Mandal Pipe Co. has been an integral participant in the retrofit project, supplying 105,000’ of 24"diameter, ¾" thick steel pipe to be used as piling. With on time delivery, Mandal Pipe Company supplied a quality product, at a tremendous savings to the contractor.