AISC v16.0 · WT shape

WT18X131

WT18X131 weighs 131 lb/ft, has a depth of 18.4 in, a cross-sectional area of 38.5 in², and an x-axis elastic section modulus Sx of 77.5 in³. Open the full US customary property record or generate 2D, data, report, and 3D reference files locally in your browser.

WT 131 lb/ft · 38.5 in² · EDI WT18X131

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Nominal profile Units · inches

Building nominal profile…

Weight: 131 lb/ft
Area: 38.5 in²
Depth: 18.4 in
Elastic Sx: 77.5 in³

From designation to geometry

Reading the WT18X131 record

The WT designation identifies a tee depth series and nominal weight per foot. Use its own tabulated depth d = 18.4 in and flange width bf = 16.6 in rather than halving every dimension of another member.

This tee has web or stem thickness tw = 0.84 in, flange thickness tf = 1.44 in and centroid distance y = 4.14 in. Stem and flange orientation matter when matching the table's axes to a model.

Ix = 1,110 in⁴ and Iy = 545 in⁴ refer to the database x- and y-axes. Here Ix is numerically larger. Axis letters are labels, not a guarantee that x is always the larger axis. These are geometric properties, not allowable loads or complete member capacities.

Match the axis and dimension conventions to the figures in the AISC v16.0 workbook Readme. The profile above simplifies manufacturing geometry; its outline is not used to recalculate the published properties.

Worked quantity example

Nominal weight for WT18X131

Assume 3 pieces, each 20 ft (6.096 m) long. This is a hypothetical quantity example, not a stock-length or lifting recommendation.

Using the published 131 lb/ft weight
Quantity	Calculation	Nominal pounds	Kilogram equivalent
One 20 ft piece	20 ft × 131 lb/ft	2,620 lb	1,188.412 kg
3 pieces	3 × 2,620 lb	7,860 lb	3,565.236 kg

Conversion: 1 lb = 0.45359237 kg; displayed results are rounded. This multiplication excludes connection plates, bolts, weld metal, coatings, cutting allowances and actual material variation. Use the material takeoff for your own lengths and quantities.

Shape family context

What is a structural tee cut from a W-shape?

A WT is a structural tee produced from a W-shape. It has one flange and a stem, so its properties, shear center, connection behavior, and fabrication orientation differ from the parent wide-flange section.

Learn how shape properties work

Common context

Common project roles include truss members, lintels, chords, edge members, reinforcement, hangers, and connection components.

Detailing watch

Confirm stem orientation, flange side, cut geometry, residual deformation, connection eccentricity, cope or weld access, and whether the specified tee is available as required.

Portable reference files

Download WT18X131 your way.

Every file is generated locally in your browser from the same nominal profile and AISC v16.0 reference record.

2D profile

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Properties & report

Tables and portable data

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Length-based 3D

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Enter a member length in inches. Mesh files are generated from the nominal reference profile.

Member length in

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Dimensions & properties

WT18X131 reference data.

Values below are derived from the AISC Shapes Database v16.0 in US customary units. A dash indicates that a property is not applicable or not included for this family.

Nominal dimensions

W: 131 lb/ft
A: 38.5 in²
d: 18.4 in
ddet: 18.375 in
bf: 16.6 in
bfdet: 16.5 in
tw: 0.84 in
twdet: 0.813 in
tf: 1.44 in
tfdet: 1.438 in
kdes: 2.39 in
kdet: 2.75 in

Centroid & detailing

y: 4.14 in
yp: 1.16 in
WGi: 7.5 in
WGo: 3 in

X-axis properties

Ix: 1,110 in⁴
Zx: 137 in³
Sx: 77.5 in³
rx: 5.36 in

Y- and z-axis properties

Iy: 545 in⁴
Zy: 102 in³
Sy: 65.8 in³
ry: 3.76 in

Torsion, warping & perimeters

J: 20.8 in⁴
Cw: 185 in⁶
PA: 52.4 in
PB: 69 in
PC: 53.4 in
PD: 70 in

Compare published reference values

WT18X131 alongside nearby WT records

These records share the same nominal series, outside envelope or leg arrangement, depending on the family. Peers are ordered by absolute weight difference, then listed depth and designation. The table does not rank structural performance or approve a substitution.

US customary values from the same AISC v16.0 dataset
Record	Weight (lb/ft)	Depth (in)	Area (in²)	Ix (in⁴)	Iy (in⁴)
WT18X131 (this record)	131	18.4	38.5	1,110	545
WT18X128	128	18.7	37.6	1,210	264
WT18X123.5	123.5	18.3	36.3	1,040	507

Relative to WT18X131, WT18X128 changes nominal weight by -3 lb/ft, listed depth by +0.3 in, and area by -0.9 in². At the same hypothetical 20 ft length, the nominal weight difference is -60 lb.

Open these records in the full comparison tool

Compare the remaining dimensions, axis conventions, grade, availability and project requirements separately. Weight or section-property similarity does not establish matching connection geometry or member capacity.

Reference use only.

Data is derived from the AISC Shapes Database v16.0, consistent with the AISC Steel Construction Manual, 16th Edition, 1st Printing. AISC advises professional verification before use in a specific application. The downloadable DXF is a nominal reference profile and may simplify rolled fillets, flange tapers, angle radii, HSS corner radii, and other manufacturing geometry. Verify all dimensions and suitability before design, detailing, ordering, or fabrication.

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