Heavy Duty JIS G3106 SM490 H Beams engineered for extreme marine and coastal environments. Premium-grade steel with superior corrosion resistance and structural integrity, ideal for docks, offshore platforms, and seawalls. Precision bending and welding services included for seamless on-site assembly. High load-bearing capacity meets strict JIS industrial standards. Bulk pricing available for large-scale construction projects. Custom cutting options to fit specific engineering requirements.