Does the height of substructures make use of formwork to construct them inconvenient or impractical?
Prefabricated substructures offer an opportunity for rapid construction while eliminating the need for staged forming. If the structure will require multiple pour lifts, is uniform in section, or has other constraints, precast columns should be evaluated. This method was recently used to build monorail columns at the Dallas-Fort Worth Airport. Although the columns were low- to mid-level, access was constrained around the terminals due to security and time constraints. Precast columns pieces were successfully used and bolted together with high stress rods minimizing access needs on the tarmac. • Does the height of the bridge above ground make falsework uneconomical or impractical? Tall falsework systems required for conventional construction are not only expensive but also require substantial engineering and time for their approval and construction. Eliminating the need to provide support for cast-in-place construction of the superstructure can have significant benefits to both time and
