Description :

Precast bridges and structures easy installation and proven durability with a variety of shapes sizes and treatments for spans from 5 ft to 102 ft the inherent strength durability cost savings and rapid installation of precast concrete bridges have made them the premier bridge technology in the world. Precast structures for bridge rehabilitation con span o series b series and bebo bridge structures can cost effectively and quickly be installed to support concrete bridges that exhibit deterioration in the concrete superstructure and upper portions of the abutments utilizing the existing foundation. Before the widespread use of steel and other tensile resistant materials bridges primarily consisted of arched structures crossing the meles river in turkey the caravan bridge is the oldest . Shape versatility structure size ranges inside span x rise bridgecorr alsp multi plater 6 x 2 steel 15 x 55 steel 9 x 25 aluminum vertical ellipse single radius arch horizontal ellipse pipe arch low profile arch super spantm super plater high profile arch super spantm super plater horizontal ellipse super spantm super plater pear arch super spantm pear super spantm box culvert custom sizes and shapes are available. The designer should have first seen and studied many bridges in the course of a long learning process he should know what type of beam may be suitable in the available conditions either a beam bridge an arch bridge or a suspended one he should also know the influence of foundation conditions on the choice of spans and structural systems etc hence the designer