Precision-formed and IS-certified, the RR MetalMakers YST 310 MS SHS - (125 x 125 x 4.5 mm) - 6 mtr Length from RR MetalMakers is a cold-rolled ERW SHS in YST 310 structural steel conforming to IS 4923:2017 (Hollow Steel Sections for Structural Use). The 125 mm × 125 mm × 4.5 mm symmetrical square profile in 6 m lengths offers high yield strength enabling slender sections under heavy axial loads demanded by heavy-duty structural, high-load, and long-span applications, with tight wall thickness tolerance, consistent straightness, and a smooth external finish. The equal geometry allows interchangeable use as columns, struts, or chord members in trusses and space frames.

• Grade YST 310 steel with minimum yield strength 310 MPa and tensile strength 450 MPa
• Square hollow profile 125 mm × 125 mm × 4.5 mm providing equal stiffness in both principal axes
• Uniform wall thickness of 4.5 mm maintained throughout the full 6 m length
• Cold-formed ERW manufacturing ensuring consistent, high-integrity weld seam quality
• Conforms to IS 4923:2017 — IS-marked with full batch mill certification
• High strength-to-weight ratio enabling leaner, lighter structural designs
• Excellent weldability — compatible with MIG, TIG, and SMAW electrode processes
• Tight dimensional tolerances on side, wall, and squareness within IS limits
• Square-cut ends for precise measurement and clean joint fitting on site
• Smooth mill-finish external surface ready for painting, galvanising, or powder coating

• Structural columns, posts, and axially loaded compression members in buildings
• Pre-Engineered Building (PEB) columns, struts, and bracing members
• Truss chord members and web diagonals in roof and bridge trusses
• Mezzanine floor columns, equipment platforms, and elevated walkways
• Gate posts, fencing columns, road barriers, and perimeter security structures
• Agricultural structures, shade-net houses, greenhouses, and storage sheds
• Conveyor support frames, material-handling gantries, and stacker structures