Common context
Common project roles include columns, braces, posts, rails, supports, and exposed round framing where the specified pipe product is appropriate.
AISC v16.0 · PIPE shape
Pipe12STD
Pipe12STD weighs 49.6 lb/ft, has a outside diameter of 12.75 in, a cross-sectional area of 13.7 in², and an x-axis elastic section modulus Sx of 41 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
- 49.6 lb/ft
- Area
- 13.7 in²
- Outside diameter
- 12.75 in
- Elastic Sx
- 41 in³
From designation to geometry
Reading the Pipe12STD record
The Manual label Pipe12STD and electronic designation Pipe12STD identify this pipe record. Nominal pipe size is an identifier: use the listed OD = 12.75 in and ID = 12 in for the reference envelope.
The record contains tnom = 0.375 in and tdes = 0.349 in. Keep the listed wall fields and schedule or weight-class identifier together; a pipe label alone does not establish the project material specification.
Ix = 262 in⁴ and Iy = 262 in⁴ refer to the database x- and y-axes. The two listed values are equal. 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 Pipe12STD
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 × 49.6 lb/ft | 992 lb | 449.964 kg |
| 3 pieces | 3 × 992 lb | 2,976 lb | 1,349.891 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 pipe section?
A PIPE entry describes a circular section using nominal pipe size and a schedule or weight class. Its outside diameter may remain constant across schedules while wall thickness, inside diameter, weight, and properties change.
Learn how shape properties workDetailing watch
Verify product specification, schedule, wall thickness, end preparation, connection fit, galvanizing or venting, and do not assume pipe and round HSS requirements are interchangeable.
Portable reference files
Download Pipe12STD 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
DXF, SVG, EPS, HPGL, PDF, PNG, WebP, CSV, XLSX, JSON, XML, YAML, TXT, and Markdown in one ZIP.
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Dimensions & properties
Pipe12STD 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
- 49.6 lb/ft
- A Area
- 13.7 in²
- OD Outside diameter
- 12.75 in
- ID Inside diameter
- 12 in
- tnom Nominal wall thickness
- 0.375 in
- tdes Design wall thickness
- 0.349 in
X-axis properties
- Ix X-axis moment of inertia
- 262 in⁴
- Zx X-axis plastic section modulus
- 53.7 in³
- Sx X-axis elastic section modulus
- 41 in³
- rx X-axis radius of gyration
- 4.39 in
Y- and z-axis properties
- Iy Y-axis moment of inertia
- 262 in⁴
- Zy Y-axis plastic section modulus
- 53.7 in³
- Sy Y-axis elastic section modulus
- 41 in³
- ry Y-axis radius of gyration
- 4.39 in
Torsion, warping & perimeters
- J Torsional constant
- 523 in⁴
Compare published reference values
Pipe12STD alongside nearby PIPE 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) | Outside diameter (in) | Area (in²) | Ix (in⁴) | Iy (in⁴) |
|---|---|---|---|---|---|
| Pipe12STD (this record) | 49.6 | 12.75 | 13.7 | 262 | 262 |
| Pipe12XS | 65.5 | 12.75 | 17.5 | 339 | 339 |
| Pipe12XXS | 126 | 12.75 | 35.4 | 625 | 625 |
Relative to Pipe12STD, Pipe12XS changes nominal weight by +15.9 lb/ft, listed outside diameter by 0 in, and area by +3.8 in². At the same hypothetical 20 ft length, the nominal weight difference is +318 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