What exact properties are tabulated for the equal angles?

Sectional area, mass per meter, distance to center of gravity, moment of inertia, section modulus, and radius of gyration.

Does this standard specify the material grade of aluminium?

No, it only covers dimensional profiles. The material requirements and grades must conform to IS 733 or IS 1285.

How are aluminium equal angles designated in drawings?

They are designated by the prefix 'AEA' followed by the size of the legs and the thickness (e.g., AEA 40 x 40 x 3).

IS 3908

: 1986

Aluminium equal leg angles

CurrentSpecializedSpecificationBIMStructural Engineering · Structural Engineering and Structural Sections

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This standard specifies the dimensions, mass, and sectional properties of extruded aluminium equal leg angles used for structural purposes. It provides essential geometric data such as center of gravity, moment of inertia, section modulus, and radius of gyration required for structural design and detailing.

Aluminium equal leg angles

Quick Reference Values

Assumed density of aluminium2.70 g/cm³ (2700 kg/m³)

Standard designation prefixAEA (Aluminium Equal Angle)

Practical Notes

This code only covers the geometric dimensions and theoretical sectional properties; the actual structural capacity will depend on the specific aluminium alloy and temper selected.

BIM modelers and detailers should use the 'AEA' designation combined with dimensions (e.g., AEA 50 x 50 x 5) for accurate scheduling.

For permissible manufacturing and extrusion tolerances on these standard sections, engineers must refer to IS 3965.