H-beam and I-beam are hot rolled through universal mill, then straightened and cut to length; non-standard large sizes can be fabricated by welding splicing. The optimized cross-section delivers large moment of inertia, strong bending resistance, light dead load and uniform stress distribution, easy for bolt & welding connection. H-beams for heavy load frames, I-beams for medium & small load-bearing structures: factory frames, high-rise building skeletons, bridge girders, crane tracks and stadium supports.