Common context
Common project roles include specialty chords, reinforcement, lintels, connection components, and industrial framing that benefits from a particular tee proportion.
AISC v16.0 · MT shape
MT4X3.1
MT4X3.1 weighs 3.1 lb/ft, has a depth of 4 in, a cross-sectional area of 0.911 in², and an x-axis elastic section modulus Sx of 0.533 in³. Open the full US customary property record or generate 2D, data, report, and 3D reference files locally in your browser.
Nominal profile
Units · inches
Building nominal profile…
- Weight
- 3.1 lb/ft
- Area
- 0.911 in²
- Depth
- 4 in
- Elastic Sx
- 0.533 in³
From designation to geometry
Reading the MT4X3.1 record
The MT designation identifies a tee depth series and nominal weight per foot. Use its own tabulated depth d = 4 in and flange width bf = 2.28 in rather than halving every dimension of another member.
This tee has web or stem thickness tw = 0.129 in, flange thickness tf = 0.177 in and centroid distance y = 1.18 in. Stem and flange orientation matter when matching the table's axes to a model.
Ix = 1.5 in⁴ and Iy = 0.176 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 MT4X3.1
Assume 3 pieces, each 20 ft (6.096 m) long. This is a hypothetical quantity example, not a stock-length or lifting recommendation.
| Quantity | Calculation | Nominal pounds | Kilogram equivalent |
|---|---|---|---|
| One 20 ft piece | 20 ft × 3.1 lb/ft | 62 lb | 28.123 kg |
| 3 pieces | 3 × 62 lb | 186 lb | 84.368 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 an M-shape?
An MT is a structural tee produced from a miscellaneous M-shape. It inherits geometry from the parent section and must be identified by its exact tee designation and listed properties.
Learn how shape properties workDetailing watch
Confirm parent-series geometry, stem and flange orientation, availability, connection eccentricity, and fabrication requirements instead of treating it as an interchangeable WT.
Portable reference files
Download MT4X3.1 your way.
Every file is generated locally in your browser from the same nominal profile and AISC v16.0 reference record.
CAD, vector, and image
Use the profile in CAD, illustration, plotting, reports, or presentations.
Tables and portable data
Take a printable datasheet, spreadsheet, structured record, or plain-text table.
Extrude a nominal member
Enter a member length in inches. Mesh files are generated from the nominal reference profile.
One-click package
Complete 2D + data bundle
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Dimensions & properties
MT4X3.1 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 Nominal weight
- 3.1 lb/ft
- A Area
- 0.911 in²
- d Depth / angle leg dimension d
- 4 in
- ddet Detailing depth
- 4 in
- bf Flange width
- 2.28 in
- bfdet Detailing flange width
- 2.25 in
- tw Web thickness
- 0.129 in
- twdet Detailing web thickness
- 0.125 in
- tf Flange thickness
- 0.177 in
- tfdet Detailing flange thickness
- 0.188 in
- kdes Design k distance
- 0.438 in
- kdet Detailing k distance
- 0.438 in
Centroid & detailing
- y Centroid y
- 1.18 in
- yp Plastic neutral axis y
- 0.497 in
X-axis properties
- Ix X-axis moment of inertia
- 1.5 in⁴
- Zx X-axis plastic section modulus
- 0.967 in³
- Sx X-axis elastic section modulus
- 0.533 in³
- rx X-axis radius of gyration
- 1.29 in
Y- and z-axis properties
- Iy Y-axis moment of inertia
- 0.176 in⁴
- Zy Y-axis plastic section modulus
- 0.247 in³
- Sy Y-axis elastic section modulus
- 0.154 in³
- ry Y-axis radius of gyration
- 0.441 in
Torsion, warping & perimeters
- J Torsional constant
- 0.008 in⁴
- Cw Warping constant
- 0.004 in⁶
Compare published reference values
MT4X3.1 alongside nearby MT 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.
| Record | Weight (lb/ft) | Depth (in) | Area (in²) | Ix (in⁴) | Iy (in⁴) |
|---|---|---|---|---|---|
| MT4X3.1 (this record) | 3.1 | 4 | 0.911 | 1.5 | 0.176 |
| MT4X3.25 | 3.25 | 4 | 0.959 | 1.57 | 0.188 |
Relative to MT4X3.1, MT4X3.25 changes nominal weight by +0.15 lb/ft, listed depth by 0 in, and area by +0.048 in². At the same hypothetical 20 ft length, the nominal weight difference is +3 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.
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.
From reference to deliverable