50 x 50 x 5 EA

Equal Angle · AS/NZS 3679.1 · Australia / New Zealand

50 x 50 x 5 EA is an equal angle with 50 × 50 mm legs, 4.6 mm thick, weighing 3.5 kg/m. The dimensions below are the published AS/NZS 3679.1 values; the drawing is generated from them.

Equal Angles serve as bracing, cleats and lintels. An unrestrained angle bends about its tilted principal axes, so the published Imin — not Ix — governs its buckling checks.

50 x 50 x 5 EA drawn to scale. Save as SVG DXF

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Published dimensions

Property	Metric	Imperial
Leg length, d	50 mm	1.97 in
Thickness, t	4.6 mm	0.181 in
Mass per metre	3.5 kg/m	2.3 lb/ft
Area, A	443 mm²	0.69 in²
Second moment, Ix	102,700 mm⁴	0.2 in⁴
Second moment, Iy	102,700 mm⁴	0.2 in⁴
Principal maximum, I_max	163,000 mm⁴	0.4 in⁴
Principal minimum, I_min	42,400 mm⁴	0.1 in⁴

Derived section properties

Integrated from the section's own outline including the root and toe radii, whose arcs are integrated analytically rather than approximated by facets. For 50 x 50 x 5 EA the computed area agrees with the published value to 0.07% and I_x to 0.09%. Where a value is also published, the published one above is the one to quote.

Property	Value
Elastic modulus, Z_x	2,846 mm³
Elastic modulus, Z_y	2,846 mm³
Plastic modulus, S_x	5,191 mm³
Plastic modulus, S_y	5,191 mm³
Radius of gyration, rx	15.2 mm
Radius of gyration, ry	15.2 mm
Principal maximum, I_max (derived)	162,834 mm⁴
Principal minimum, I_min (derived)	42,377 mm⁴
Principal axis angle, θ_p	45.0°

Z is the elastic modulus and S the plastic modulus, following AS 4100. Under AISC 360 the letters are reversed.

Neighbouring sizes

Lighter45 x 45 x 5 EA3.1 kg/m Heavier40 x 40 x 6 EA3.5 kg/m

Where these numbers come from

Published AS/NZS 3679.1 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API