Tubes

Hot finished structural hollow sections (SHS) have been used in both the superstructure and substructures of a range of bridges, from simple footbridges to landmark structures such as Merchants bridge and the Lowry Centre lift-bridge. The lightness of SHS, its torsional rigidity, and clean appearance are particularly suited to vierendeel and warren truss footbridges, with typical spans of 10m to 40m. The trusses are normally used as through or half through girders to minimise the effective construction depth, and the length of approach ramps or stairs. Such footbridges are usually erected complete as single units with lightweight surfacing, which minimises traffic disruption, and avoids the problems associated with site connections. Larger SHS have been used as columns, or bridge piers, and may be filled with concrete for enhanced stiffness and strength.

These types of structures efficiently use hollow sections, and present a smooth exterior finish without hazard to users or crevices to trap water and cause corrosion problems.Advantages of Tubular Members in Bridges

Advantages

General

• Clean appearance
• Torsional rigidity
• Efficient as strut or beam without instability 

Rolled Hollow Sections

• Reduced maintenance if sealed

Fabricated Tubular sections

• Internal maintenance less than for external surfaces

Product Range

Tata Steel manufacture Celsius Hot Finished Structural Hollow Sections in accordance with the technical delivery requirements of EN 10210-1: 2006, and the dimensions and tolerances of EN 10210-2:2006. In general, structural hollow sections can be supplied in lengths up to 14.5m, and in the range of sizes illustrated in the table below. However, detailed advice should be sought to confirm available lengths, once the section size is known.

Celsius Structural Hollow Sections to EN 10210

Notes

1. CHS diameters over 508mm and up to 2130mm may be supplied by special agreement with Tata Steel from our submerged arc welded (SAW) pipe mills.
2. RHS (Square) sizes over 400 x 400mm and up to 700 x 700mm are available by special arrangement.

Grades

Production has been standardised on EN 10210 grade S355J2H, formerly BS4360 grade 50D respectively. However, other grades and sub-grades can be supplied subject to minimum mill quantities.

Associated products

• Highway bridge parapets - Range of tested standard parapets meeting HA
  requirements
• Lighting columns - Range of column heights, post fittings, and arm brackets