steel pipe girder connecting steel pipes by steel brackets and installing the upper plate of a bridge onto the steel pipes, and constructing method of bridge using the steel girder

摘要

The invention at regular intervals to the load applied to the small small bridge overpass or working in pairs by interconnecting the lower portion of the steel pipe with a steel bracket installed , and then weld a nice bridge deck on the upper part of the pipe, girders made of steel pipe installed a handrail support on both sides of the bridge deck and then mounted on the steel pipe girders, piers installed gihi and will install the bridge by placing a handrail , if you screw up the stairs overpass to allow traffic on both sides of the steel pipe girder .