> ## Documentation Index
> Fetch the complete documentation index at: https://calcs.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Design a Steel Beam (ASD) to AISC 360-16

> Design steel beams to AISC 360-16 (ASD) with multiple supports and loads. An earlier code edition, kept for existing projects.

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    <div className="calc-details-head"><span className="calc-card-icon"><Icon icon="calculator" size={20} color="#0076d6" /></span><p className="calc-details-name">Steel Beam (ASD, AISC 360-16)</p><a className="calc-details-run" href="https://app.calcs.com/new/sheet/steelBeamASD">Run the calc</a></div>
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  Beam reactions link to the columns and footings below, so load changes propagate downstream automatically. Design steel beams to AISC 360-16 ASD with multiple supports and loads. Floor- and roof-beam presets cut repetitive entry.
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<Note>
  This calculator uses an earlier code edition (AISC 360-16 (ASD)). It stays available for existing projects. For new designs, check the [Calculator Library](/docs/calculators/us) for the current edition.
</Note>

## Worked example

See [Worked Example: Steel Beam to AISC 360-16](/docs/running-calculations/example-calculations/us/worked-example-steel-beam) for a full worked example with this calculator.

## Method & scope

| Property         | Detail                                                                                                                                                                |
| ---------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Design standards | AISC 360-16 (ASD)                                                                                                                                                     |
| Regions          | United States                                                                                                                                                         |
| Presets          | Generic Beam, Floor Joist, Floor Girder, Ceiling Joist, Hip / Valley, Rafter, Ridge Beam, Roof Header, and 3 more                                                     |
| What it checks   | Structural analysis, Section classification (AISC 360-16, B4), Flexural capacity (AISC 360-16, Chapter F), Shear capacity (AISC 360-16, Chapter G), Deflection checks |

#### Calculation method

The Steel Beam (ASD, AISC 360-16) calculator designs steel beams using Allowable Stress Design provisions per AISC 360-16. Demands are compared to allowable capacities using the ASD safety factor Omega, not factored load combinations. Checks cover section classification, flexure, shear, and deflection.

##### Structural analysis

The beam is modeled as a 1D Euler-Bernoulli beam element. A finite element engine solves for moment, shear, reactions, and deflections under each load combination. Multiple load types are supported: distributed loads, line loads, point loads, and moment loads. ASD load combinations per ASCE 7/IBC are applied automatically.

##### Section classification (AISC 360-16, B4)

Flange and web slenderness ratios are compared to the compact and non-compact limits (lambda\_p and lambda\_r) for the selected section. This determines whether the section is compact, non-compact, or slender, which governs the flexural capacity calculation path.

##### Flexural capacity (AISC 360-16, Chapter F)

Allowable bending moment strength M\_n/Omega is the lesser of the yielding limit and the lateral-torsional buckling (LTB) limit:

* **Yielding**: M\_n = M\_p = F\_y × Z\_x
* **LTB**: M\_n based on the unbraced length L\_b relative to L\_p and L\_r, using moment gradient factor C\_b

**utilization = M\_a / (M\_n / Omega\_b) ≤ 1.0**

Positive and negative bending are checked separately, since many sections have asymmetric capacity about their weak axis (WT, ST, MT, 2L, L sections in particular).

##### Shear capacity (AISC 360-16, Chapter G)

Web shear capacity accounts for shear yielding and, for slender webs, shear buckling:

**utilization = V\_a / (V\_n / Omega\_v) ≤ 1.0**

##### Deflection checks

Three deflection limits are tracked:

* **Instantaneous (live + other) deflection**, checked against L/span criterion (default L/360) or an absolute limit
* **Long-term deflection**, checked against the long-term span criterion
* **Simplified DL+(LL or SL) deflection**, for floor systems, checked against the combined criterion

Each deflection limit and governing load case is reported individually.

##### Assumptions

Axial load is assumed negligible. Members are straight and prismatic (not tapered). Inclined beams are supported but axial force is not checked and must be verified separately by the engineer.

## 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>

## Common questions

<AccordionGroup>
  <Accordion title="What design method and standard does this calculator follow?">
    The calculator uses Allowable Stress Design (ASD) per AISC 360-16, Specification for Structural Steel Buildings. Demands are compared to allowable capacities using the ASD safety factor (Omega), not factored loads. Checks include flexure, shear, deflection, and lateral-torsional buckling per AISC 360-16 Chapter F.
  </Accordion>

  <Accordion title="What are the key inputs?">
    Key inputs are span length, support conditions and bearing details, steel section (W, S, C, MC, HSS, or custom from the AISC database), steel yield strength (Fy), and applied loads (dead, live, roof live, snow, wind). You also specify unbraced length for lateral-torsional buckling and deflection limits for serviceability checks.
  </Accordion>

  <Accordion title="What does the calculator check and output?">
    Checks include bending (M/Mn), shear (V/Vn), and deflection against L/360 (live load) and L/240 (total load) defaults, adjustable by the engineer. Lateral-torsional buckling capacity is computed using the Cb factor for the actual moment gradient. Each result shows the governing AISC 360-16 equation and safety factor.
  </Accordion>

  <Accordion title="Can I use this for composite steel beams?">
    This calculator covers non-composite steel beams only. For composite steel beams with concrete deck, the separate Steel Composite Beam (LRFD, AISC 360-22) calculator handles the transformed section properties and stud requirements. Non-composite ASD design is appropriate for beams where shear studs are not specified.
  </Accordion>

  <Accordion title="How should I set up deflection limits for floor beams versus roof beams?">
    AISC Design Guide 3 recommends L/360 for live load deflection on floor beams supporting plaster or sensitive finishes, and L/240 for total load. Roof beams typically use L/240 for live or snow and L/180 for total load when ponding is not a concern. Enter limits appropriate for your occupancy and finish conditions, the calculator flags any exceedance.
  </Accordion>

  <Accordion title="Does this calculator support load linking with column and footing calculations?">
    Yes. Beam support reactions link directly to column and footing calculators in the same Calcs.com project. When span, section, or loading changes in the beam, all linked calculations update automatically, no manual re-entry of reactions. This is essential for steel framing where a beam reaction drives a column that bears on a spread footing.
  </Accordion>
</AccordionGroup>

## Next steps

<CardGroup cols={2}>
  <Card title="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="Steel Joist Calculator - Basic Guide" icon="calculator" href="/docs/calculators/us/beams/steelJoistsASD">
    Check open-web steel joist designations (K, LH, DLH and KCS series) against SJI 100-2020 Load Tables under ASD load combinations.
  </Card>

  <Card title="Design a Wood Column (ASD) to NDS 2018" icon="calculator" href="/docs/calculators/us/columns/timberColumnASD">
    Design wood columns and studs to NDS 2018 (ASD). An earlier code edition, kept for existing projects.
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    Design continuous wall footings to ACI 318-19 per IBC 2021 or IBC 2024. Results cover ultimate load, bearing capacity and serviceability.
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  <Card title="Design a Pier Footing to ACI 318-14" icon="calculator" href="/docs/calculators/us/foundations-and-retaining-walls/foundationsPierFootingUSA">
    Design pier and deck footings to ACI 318-14 (IBC 2018). An earlier code edition, kept for existing projects.
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  <Card title="Design a Steel Beam (ASD) to AISC 360-22" icon="calculator" href="/docs/calculators/us/beams/steelBeamASDAISC360-22">
    Design hot-rolled steel beams to AISC 360-22 (ASD) with multiple spans and service-level loads. Checks bending, shear and three deflection limits.
  </Card>

  <Card title="US Steel Beam - Interpreting & Optimizing Results" icon="calculator" href="/docs/calculators/us/beams/steel-beam-interpreting-optimizing-results">
    US Steel Beam - Interpreting & Optimizing Results
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