Spark presents the Grade YST 310 MS RHS Spark YST 310 MS RHS - (66 x 32 x 4 mm) - 6 mtr Length, an IS 4923:2017-compliant ERW cold-formed rectangular hollow section with 66 mm depth, 32 mm width, 4 mm wall thickness, and 6 m standard length. Certified to achieve a minimum yield of 310 MPa and UTS of 450 MPa, this section is optimised for heavy structural, high-load bearing frames, and primary spanning applications requiring directional bending strength and dimensional accuracy. The rectangular hollow profile allows internal service routing while delivering full structural functionality as beams, lintels, and spanning members in steel construction.

• Cold-formed ERW rectangular hollow section to IS 4923:2017 Grade YST 310
• Four flat external faces providing maximum bearing area for connection hardware
• Minimum 310 MPa yield and 450 MPa UTS meeting structural design code requirements
• Precise rectangular geometry enabling flush-face connections without packing plates
• Consistent internal dimensions suitable for sleeve joints and end-plate connections
• Surface free from major defects for seamless paint or hot-dip galvanizing adhesion
• 6 m standard length for efficient stacking, handling, and transportation logistics
• Suitable for cold punching, drilling, sawing, and plasma cutting on-site
• Closed cross-section superior to open sections in torsion-critical beam applications
• Produced under controlled forming conditions for reliable batch-to-batch consistency

• High-strength primary beams in multi-storey structural steel building construction
• Main chord spanning members in heavy roof trusses and long-span structures
• Industrial chimney, stack, and flare tower horizontal bracing structural members
• Primary spanning beams in composite concrete-filled tube construction systems
• Heavy conveyor gallery primary spanning beams and structural frame members
• Structural beams in shipbuilding, marine fabrication, and offshore deck structures
• High-load industrial shelving primary beams and heavy duty racking cross sections
• Structural portal frame rafters and primary spanning members in large buildings