SQUARE BOX SECTION

Tianjin Lefin Industrial Co., Ltd is one of the most experienced manufacturers and suppliers of square box section in China. Please feel free to buy high quality square box section from our factory. Good service and reasonable price are available.

A SQUARE BOX SECTION is a type of beam section commonly found in engineering structures, and its core feature is a square hollow structure.

• Geometry: Square in section, hollow inside, usually by four equal length of metal or concrete wall panels enclosed to form a closed box. This design combines the strength advantages of a solid cross-section with the lightweight characteristics of a hollow structure.

• Mechanical properties: Due to the hollow structure, the material is mainly distributed at the outside of the section, which significantly improves the flexural stiffness and torsional performance, while reducing the dead weight, suitable for large-span or high-load scenarios.

• Common materials: steel (such as hot rolled steel, welded steel plate) or reinforced concrete. Steel box beams are often used in Bridges and industrial structures, and concrete box beams are mostly used in building frames.

• Manufacturing process: Closed sections are formed by welding or pouring, ensuring uniform wall thickness to avoid stress concentration. Modern technology also involves automated bending and laser cutting processes.

• Bridge engineering: As a main beam or pier support structure, such as a Box Girder Bridge, can effectively distribute vehicle loads and resist wind loads.

• Building frame: beams or columns for high-rise buildings, taking into account bearing capacity and space utilization.

• Machinery and vehicles: Used in heavy machinery chassis or rail transit vehicle body to improve the resistance to torsion.

Brand: LEFIN STEEL

Types: RHS, SHS

SHS: OD(Outside diameter )20×20-1200×1200mm      WT(Wall Thikness):1.2-60mm

RHS:OD(Outside diameter )20×20-1200*1500mm       WT(Wall Thikness):1.2-60mm

Length:4m, 6m, 12m or as your required

Standards: ASTM A500, ASTM A501, ASTM A53 

                    EN10210, EN10219, EN10217

                    AS/NZS 1163

                   JIS G3466, JIS G3101

                    API 5L

Corner Type: Radius Corner, Sharp Angle Corner, Right Angle Corner

Application: Heavy steel structure, Aerospace Engineering, High-speed rail, Shipbuilding, For machinery, For automobiles and high-speed trains, For chemical industry and boiler, For bridge.

Advantages:
• High rigid-to-weight ratio: Hollow design ensures strength while reducing material consumption.
• Versatility: Internal cavities can accommodate piping or be filled with lightweight materials (such as foam concrete) for enhanced insulation and sound insulation.

Limitations:
• High manufacturing complexity: the welding or pouring process is strict and prone to residual stress.
• Maintenance difficulty: internal cavity may be water corrosion, need to design drainage system.