ST12X53

Structural Tee (from S) · AISC Shapes Database v15.0 · United States

ST12X53 is a structural tee cut from an S-shape 312.4 mm deep with a 199.9 mm wide flange, weighing 78.9 kg/m. The dimensions below are the published AISC Shapes Database v15.0 values; the drawing is generated from them.

ST tees are cut from S-shapes and inherit the parent’s tapered flange, which the drawing here reproduces.

ST12X53 drawn to scale. Save as SVG DXF

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Published dimensions

Property	Metric	Imperial
Depth, d	312.4 mm	12.30 in
Flange width, bf	199.9 mm	7.87 in
Flange thickness, tf	27.7 mm	1.090 in
Web thickness, tw	15.8 mm	0.620 in
Mass per metre	78.9 kg/m	53.0 lb/ft
Area, A	10,065 mm²	15.60 in²
Second moment, Ix	89,905,988 mm⁴	216.0 in⁴
Second moment, Iy	15,983,287 mm⁴	38.4 in⁴

Derived section properties

Integrated from a square-cornered outline — the fillet radii this family really has are not drawn, so the computed values differ slightly from published. For ST12X53 the computed area is 0.44% from published and I_x 1.11%. Where a value is also published, the published one above is the one to quote.

Property	Value
Elastic modulus, S_x	397,845 mm³
Elastic modulus, S_y	161,951 mm³
Plastic modulus, Z_x	714,810 mm³
Plastic modulus, Z_y	272,598 mm³
Radius of gyration, rx	95.2 mm
Radius of gyration, ry	40.2 mm

S is the elastic modulus and Z the plastic modulus, following AISC 360. Australian and British practice reverse the letters.

Neighbouring sizes

LighterST12X5074.4 kg/m HeavierST12X60.590.0 kg/m

Where these numbers come from

Published AISC Shapes Database v15.0 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API