> ## Documentation Index
> Fetch the complete documentation index at: https://calcs.com/docs/llms.txt
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# Design a Steel Column (ASD) to AISC 360-22

> Design hot-rolled steel columns and posts to AISC 360-22 (ASD). Checks axial compression, flexural buckling and combined axial and bending.

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    <div className="calc-details-chips"><span className="calc-chip calc-chip--region">United States</span><span className="calc-chip calc-chip--primary">AISC 360-22 (ASD)</span></div>
    <div className="calc-details-head"><span className="calc-card-icon">    <img src="https://mintcdn.com/clearcalcs/76EPoy-ubBj1vg6U/images/calculator-icons/395ce6140871ab700178af19a0d27ef3cde99155f2eb1c6eb7419822a07ff124.svg?fit=max&auto=format&n=76EPoy-ubBj1vg6U&q=85&s=db5f519ce45f16d594074f25409d5df6" alt="" width="24" height="24" loading="lazy" data-path="images/calculator-icons/395ce6140871ab700178af19a0d27ef3cde99155f2eb1c6eb7419822a07ff124.svg" /></span><p className="calc-details-name">Steel Column (ASD)</p><a className="calc-details-run" href="https://app.calcs.com/new/sheet/steelColumnASDAISC360-22">Run the calc</a></div>
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<div className="calc-answer">
  Design hot-rolled steel columns and posts to AISC 360-22 ASD, the current edition for 2024 IBC projects, using service-level loads. Checks cover allowable axial compressive strength, flexural buckling, and combined axial-plus-bending interaction. Column loads link from beams above to footings below automatically.
</div>

## Method & scope

| Property         | Detail                                                                                                                        |
| ---------------- | ----------------------------------------------------------------------------------------------------------------------------- |
| Design standards | AISC 360-22 (ASD)                                                                                                             |
| Regions          | United States                                                                                                                 |
| Presets          | Generic Concentrically-Loaded Column, Interior Isolated Column, Exposed Outdoor Isolated Column                               |
| What it checks   | Structural analysis, Axial compression capacity, Flexural capacity, Combined axial compression and bending, Axial deformation |

#### Calculation method

The Steel Column (ASD, AISC 360-22) calculator designs hot-rolled steel columns and posts using Allowable Stress Design per the latest edition of the AISC Specification. It runs a first-order structural analysis to determine service-level demands, then applies AISC 360-22 allowable capacity equations for all limit states.

##### Structural analysis

The calculator performs FEA on the column as a beam-column, resolving axial forces, moments, and deflections under service loads. End conditions (pinned, fixed, roller) are specified at each support. Concentrated axial and distributed lateral loads can be applied at any height. A first-order moment amplification factor accounts for P-delta effects; the member is assumed to be part of a braced frame.

##### Axial compression capacity

Allowable axial compressive strength follows AISC 360-22 Chapter E:

**utilization = Pa / (Pn / Omega\_c) ≤ 1.0**

where Omega\_c = 1.67. The nominal compressive strength Pn is governed by flexural buckling for doubly-symmetric shapes. For singly-symmetric and unsymmetric sections, flexural-torsional buckling is additionally evaluated. Slender element Q factors are applied per Section E7 where local buckling reduces the available strength.

##### Flexural capacity

Moment demands from eccentricity or lateral loads are checked per AISC 360-22 Chapter F:

**utilization = |Ma| / (Mn / Omega\_b) ≤ 1.0**

where Omega\_b = 1.67. Compact, non-compact, and slender section classifications per Table B4.1b govern the applicable strength equations. Lateral-torsional buckling is evaluated against the unbraced length and limiting lengths Lp and Lr.

##### Combined axial compression and bending

The AISC H1-1 interaction check (ASD form) covers simultaneous axial and biaxial bending:

* For Pa \* Omega\_c / Pn ≥ 0.2: (Pa \* Omega\_c / Pn) + (8/9) \* (Mxa \* Omega\_b / Mnx + Mya \* Omega\_b / Mny) ≤ 1.0
* For Pa \* Omega\_c / Pn \< 0.2: (Pa \* Omega\_c / 2Pn) + (Mxa \* Omega\_b / Mnx + Mya \* Omega\_b / Mny) ≤ 1.0

Both strong- and weak-axis moments are included in the interaction check.

##### Axial deformation

Axial shortening under service loads is calculated and reported alongside strength checks for serviceability review.

##### Outputs

Results are displayed as color-coded utilization ratios for each limit state with code clause references. The governing check, critical load case, and section properties are summarized for report documentation and QA review.

## How to use it

<Steps>
  <Step title="Open the calculator">
    Open it from **Run calc** in the About this calculator panel above. To start from a typical setup, choose one of the presets listed there.
  </Step>

  <Step title="Enter your inputs">
    Work through the input sections from top to bottom. Click any input label to see its reference explanation, clause, conditions and assumptions. See [Checks, References, Conditions and Assumptions](/docs/running-calculations/checking-results/checks-references-conditions-assumptions).
  </Step>

  <Step title="Review the results and export">
    Check the utilization of each governing check in the summary, then export a PDF report. See [Views and Export](/docs/running-calculations/exporting-reports/views-and-export).
  </Step>
</Steps>

#### US Steel Column (ASD): Overview

<iframe src="https://www.youtube.com/embed/iXc7RQar0T0" title="US Steel Column (ASD): Overview" className="w-full h-96 rounded-xl" allowFullScreen allow="autoplay; fullscreen" />

#### US Steel Column (ASD): Example

<iframe src="https://www.youtube.com/embed/QajAzh2loC4" title="US Steel Column (ASD): Example" className="w-full h-96 rounded-xl" allowFullScreen allow="autoplay; fullscreen" />

## Available presets

Each preset opens the calculator with a typical setup already entered.

| Preset                                                          | Open in Calcs.com                                                                                     |
| --------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------- |
| <span id="genericColumn" />Generic Concentrically-Loaded Column | [Run with preset](https://app.calcs.com/new/sheet/steelColumnASDAISC360-22?presetCode=genericColumn)  |
| <span id="isolatedColumn" />Interior Isolated Column            | [Run with preset](https://app.calcs.com/new/sheet/steelColumnASDAISC360-22?presetCode=isolatedColumn) |
| <span id="exposedColumn" />Exposed Outdoor Isolated Column      | [Run with preset](https://app.calcs.com/new/sheet/steelColumnASDAISC360-22?presetCode=exposedColumn)  |

## Common questions

<AccordionGroup>
  <Accordion title="What design method and code does this calculator use?">
    The calculator uses Allowable Stress Design (ASD) per AISC 360-22, the current edition of the AISC Specification. Unfactored service-level loads are compared against allowable capacities (nominal strength divided by Omega safety factors).
  </Accordion>

  <Accordion title="What are the key inputs?">
    Key inputs include column height, end conditions (pinned, fixed, roller), service-level axial loads with optional eccentricity, distributed lateral loads, and effective length factors Kx and Ky. The steel section is selected from the AISC shape database or entered as a custom section.
  </Accordion>

  <Accordion title="What limit states does it check?">
    The calculator checks allowable axial compressive strength (flexural and flexural-torsional buckling), allowable flexural strength including lateral-torsional buckling, and combined axial compression plus biaxial bending interaction per AISC 360-22 Chapter H ASD provisions.
  </Accordion>

  <Accordion title="How does AISC 360-22 affect ASD column design compared to 360-16?">
    AISC 360-22 refines the slender element reduction provisions in Chapter E and updates references to align with the 2022 AISC Steel Construction Manual. For most standard W-shape columns under ASD the capacity differences are small, but 360-22 is required for projects submitted under the 2024 IBC.
  </Accordion>

  <Accordion title="How do I set effective length factors (K-factors)?">
    Kx and Ky are entered as direct inputs. For braced frames K = 1.0 is conservative. The AISC Commentary alignment charts provide K-factors for frames with partially restrained end conditions. More precise K-factors can be derived from a stability analysis of the full frame.
  </Accordion>

  <Accordion title="Can this calculator receive loads from a beam and pass axial load down to a footing calculation?">
    Yes, column axial load can be linked from beam reaction outputs above, and the resulting column base reaction links to a footing or base plate calculation below. Changes propagate automatically across the full load path.
  </Accordion>
</AccordionGroup>

## Next steps

<CardGroup cols={2}>
  <Card title="Steel Column Validation Examples" icon="calculator" href="/docs/calculators/us/columns/steel-column-validation-examples">
    Validation and design examples for steel columns to the 2016 AISC Specification, compared with AISC Companion examples.
  </Card>

  <Card title="US Calculator Library" icon="list" href="/docs/calculators/us">
    Complete list of Calcs.com design calculators available for United States projects (AISC, ACI, NDS, ASCE 7, IBC, and related standards).
  </Card>

  <Card title="Design a Steel Column (LRFD) to AISC 360-22" icon="calculator" href="/docs/calculators/us/columns/steelColumnAISC360-22">
    Design and analyze steel columns and posts to AISC 360-22 (LRFD). Multiple end fixities with traffic-light checks for moment, axial, and deformation.
  </Card>
</CardGroup>