I. Product Aliases

Industry Designations: 4-hole angle fitting, L-type reinforced angle connector, 90° two-dimensional transition connector, seismic support L angle bracket.Compatible with 41-series C-channels (41×21, 41×41 channels), it is a core load-bearing corner fitting for seismic supports.

II. Structural Features

• Formed by integrated bending plus welded triangular stiffeners, featuring much higher rigidity than ordinary simple L-type angle brackets;

• Equipped with four mounting round holes (Φ13.5 mm, suitable for M12 T-bolts);

• Standard 90° right-angle structure to realize perpendicular connection between two C-channels;

• Welded reinforced structure resists deformation under seismic loads and meets the mechanical load requirements for electromechanical seismic resistance.

III. Main Applications

• 90° corner connection for frames between seismic support uprights and cross arms;

• Joint transition between seismic diagonal braces and main supports;

• Corner reinforcement of prefabricated supports and hangers for air ducts, water supply & drainage pipelines and cable trays;

• Assembly of seismic supports for electromechanical pipelines in basements and utility tunnels;

• Right-angle splicing of channel steel frames for photovoltaic supports and energy storage equipment.

Basic Technical Parameters

Material: Q235B carbon steel

Common Plate Thickness: 4mm, 5mm (5mm thickened type is preferred for seismic engineering, thickness ≥5mm)

Surface Treatment: Electro-galvanizing (indoor use) / Hot-dip galvanizing (basements and humid environments)

Applicable Standards:

GB/T 37267 General Technical Specifications for Building Seismic Supports and Hangers

GB 50981 Code for Seismic Design of Building Electromechanical Engineering