StructureCalcs

65 x 50 x 8 UA

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

65 x 50 x 8 UA is an unequal angle with 65 × 50 mm legs, 7.8 mm thick, weighing 6.6 kg/m. The dimensions below are the published AS/NZS 3679.1 values; the drawing is generated from them.

Unequal Angles put the longer leg where connection or stiffness demands it; like every angle they buckle about tilted principal axes, and the principal pair is published here.

65 x 50 x 8 UA drawn to scale. Save as SVG DXF

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Published dimensions

PropertyMetricImperial
Leg length, d65 mm2.56 in
Second leg, b50 mm1.97 in
Thickness, t7.8 mm0.307 in
Mass per metre6.6 kg/m4.4 lb/ft
Area, A840 mm²1.30 in²
Second moment, Ix340,700 mm⁴0.8 in⁴
Second moment, Iy173,900 mm⁴0.4 in⁴
Principal maximum, Imax421,000 mm⁴1.0 in⁴
Principal minimum, Imin93,600 mm⁴0.2 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 65 x 50 x 8 UA the computed area agrees with the published value to better than 0.01% and Ix to 0.04%. Where a value is also published, the published one above is the one to quote.

PropertyValue
Elastic modulus, Zx7,751 mm³
Elastic modulus, Zy4,779 mm³
Plastic modulus, Sx14,086 mm³
Plastic modulus, Sy8,737 mm³
Radius of gyration, rx20.1 mm
Radius of gyration, ry14.4 mm
Principal maximum, Imax (derived)420,798 mm⁴
Principal minimum, Imin (derived)93,562 mm⁴
Principal axis angle, θp29.7°

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

Neighbouring sizes

Lighter75 x 50 x 6 UA5.7 kg/mHeavier75 x 50 x 8 UA7.2 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