The buildings, houses, bridges, freeways, and other architectural structures that you find in cities are constructed by joining many parts together. We believe that the most important elements required in such structures are safety and ease of construction.

Until recently the only way to join the structural cages and beams of reinforced concrete was by welding because these components are only accessible from one side. However, welding is inefficient because it requires skilled labour and, since there is variance in welding quality, X-ray inspection is needed to ensure safety.

In order to solve such problems, FUSERASHI developed a joining technology called ONE-SIDE BOLT. This fastener allows an unskilled labourer to fasten parts from one side using a high-tensile bolt and provides such advantages as improved earthquake resistance, lowered construction cost, shortened construction time, and reduced labour. Besides building construction, currently this joint technique is also widely adopted for urban infrastructure, such as bridge reinforcement and preventing freeway side-walls from falling, all this while simultaneously providing the opposing features of optimum safety and installation ease.