> ## 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.

# 🇺🇸 Calculators for United States

> Welcome to the calculators for the United States. Here you'll find comprehensive documentation and examples for structural calculations based on US codes and standards including AISC 360, ACI 318, NDS 2018, and ASCE 7.

<div className="docs-region-top docs-region-top--us" aria-hidden="true" />

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  <div className="docs-ai-callout-icon">✨</div>

  <p className="docs-ai-callout-text">
    <strong>Looking for something specific?</strong> Use the <strong>AI assistant</strong> in this documentation site. Ask in plain language, for example <em>"How do I design a wood beam to NDS 2018?"</em> or <em>"Where are the ASCE 7 wind load guides?"</em> It searches our guides and worked examples for you.
  </p>
</div>

## 🚀 Quick Start

<CardGroup cols={2}>
  <Card title="3 Steps to Success" icon="list-numbers" href="/learn_calcs/getting_started/getting_started__3_simple_steps_for_success">
    Learn the three key steps to using Calcs.com
  </Card>

  <Card title="Video Tutorials" icon="video" href="/calculations/general_analysis_calculations/calcs_calculator_tutorials_and_worked_examples">
    US calculator walkthroughs on YouTube
  </Card>

  <Card title="Project Defaults" icon="adjustments-horizontal" href="/calculations/us/project_defaults_us">
    Configure default values for US projects
  </Card>

  <Card title="Worked Examples" icon="book" href="/calculations/us/worked_example__steel_beam_to_aisc_360_16">
    See real-world design examples
  </Card>
</CardGroup>

## ⚙️ Project Defaults

<CardGroup cols={3}>
  <Card title="US Project Defaults Guide" icon="adjustments-horizontal" href="/calculations/us/project_defaults_us">
    Full guide to US project defaults
  </Card>

  <Card title="Cheat Sheet" icon="file-text" href="/calculations/us/project_defaults_cheat_sheet">
    Quick reference for common defaults
  </Card>

  <Card title="FAQ: How They Work" icon="question-mark" href="/learn_calcs/faq/how_project_defaults_work">
    How project defaults propagate across calculators
  </Card>

  <Card title="Video: Project Defaults" icon="video" href="/learn_calcs/getting_started/onboarding_videos/how-to-proj-defaults">
    Walkthrough of setting up project defaults
  </Card>
</CardGroup>

## 📐 Calculation Modules

### Beams

<CardGroup cols={3}>
  <Card title="Wood Beams (NDS)" icon="wood" href="/calculations/us/how_to_design_a_wood_beam_to_nds_2018__asd_and_lrfd_">
    Design wood beams, joists, and rafters to NDS 2018
  </Card>

  <Card title="Deck Design Series" icon="layers-linked" href="/calculations/us/how_to_design_a_deck_with_calcs">
    Complete deck design walkthrough and sub-guides
  </Card>

  <Card title="Steel Beams (AISC)" icon="square-letter-s" href="/calculations/us/how_to_design_a_steel_beam_to_aisc_360_16__asd_and_lrfd_">
    Design steel beams to AISC 360-16 (ASD and LRFD)
  </Card>

  <Card title="Cold-Formed Steel" icon="square-letter-c" href="/calculations/us/how_to_design_a_cold_formed_steel_beam_to_aisi_s100_16_csa_s136_16">
    Design cold-formed steel beams to AISI S100-16
  </Card>

  <Card title="Concrete Beams (ACI)" icon="cube" href="/calculations/us/how_to_design_a_rectangular_concrete_beam_to_aci_318_14">
    Design rectangular concrete beams to ACI 318-14
  </Card>
</CardGroup>

### Columns

<CardGroup cols={3}>
  <Card title="Wood Columns" icon="wood" href="/calculations/us/how_to_design_a_wood_column_to_nds_2018">
    Design wood columns to NDS 2018
  </Card>

  <Card title="Concrete Columns" icon="cube" href="/calculations/us/concrete_column_calculator_to_aci_318_19_overview">
    Design concrete columns to ACI 318-19
  </Card>

  <Card title="Steel Columns" icon="square-letter-s" href="/calculations/us/steel_column_validation_examples">
    Steel column design and validation examples
  </Card>
</CardGroup>

### Connections

<CardGroup cols={1}>
  <Card title="Steel Base Plate" icon="link" href="/calculations/us/connections/steel_base_plate_lrfd_aci_318_19">
    Design steel base plates (LRFD) to ACI 318-19
  </Card>
</CardGroup>

### Foundations & Retaining Walls

<CardGroup cols={3}>
  <Card title="Spread Footings" icon="stack-2" href="/calculations/us/how_to_design_a_spread_footing_to_aci_318_14">
    Design spread footings to ACI 318-14
  </Card>

  <Card title="Wall Footings" icon="stack-2" href="/calculations/us/wall_footing_to_aci_318_14___design_example">
    Design wall footings to ACI 318-14
  </Card>

  <Card title="Retaining Walls" icon="stack-2" href="/calculations/us/cantilever_retaining_wall_overview">
    Cantilever and restrained retaining wall guides
  </Card>
</CardGroup>

### Walls & Slabs

<CardGroup cols={2}>
  <Card title="Wood Shear Walls" icon="columns-3" href="/calculations/us/how_to_design_a_wood_shear_wall">
    Design wood shear walls and diaphragms
  </Card>

  <Card title="One Way Slabs" icon="square-dot" href="/calculations/us/us_one_way_slab">
    Design one way concrete slabs
  </Card>
</CardGroup>

### Masonry Walls

<CardGroup cols={3}>
  <Card title="Masonry Gravity Wall (LRFD)" icon="wall" href="/calculations/us/masonry-gravity-wall-lrfd">
    Out-of-plane CMU gravity walls to TMS 402/602-22 (LRFD)
  </Card>

  <Card title="Masonry Gravity Wall (ASD)" icon="wall" href="/calculations/us/masonry-gravity-wall-asd">
    Out-of-plane CMU gravity walls to TMS 402/602-22 (ASD)
  </Card>

  <Card title="Masonry Shear Wall (LRFD)" icon="wall" href="/calculations/us/masonry-shear-wall-lrfd">
    In-plane CMU shear walls with openings to TMS 402/602-22
  </Card>
</CardGroup>

### Loads

<CardGroup cols={3}>
  <Card title="Wind Loads" icon="wind" href="/calculations/us/wind_loads__asce_7_16____mwfrs_overview">
    Calculate wind loads per ASCE 7-16 and ASCE 7-22
  </Card>

  <Card title="Seismic Loads" icon="wave-saw-tool" href="/calculations/us/worked_example__seismic_analysis_to_asce_7_16">
    Seismic analysis to ASCE 7-16
  </Card>

  <Card title="Snow Loads" icon="temperature-snow" href="/calculations/us/us_snow_loads_calculator_worked_example">
    Calculate snow loads
  </Card>
</CardGroup>

## 📚 Popular Guides

<CardGroup cols={2}>
  <Card title="ASD vs LRFD" icon="scale" href="/learn_calcs/faq/asd_and_lrfd_calculations">
    Understanding ASD and LRFD design methods
  </Card>

  <Card title="Building Codes & Load Combinations" icon="book" href="/learn_calcs/faq/building_codes___load_combinations_in_the_united_states">
    US building codes and load combination requirements
  </Card>
</CardGroup>

## 🔍 Browse by Category

Use **Design Calculators → US Calculators** in the left sidebar to explore all guides organized by:

* **Project Defaults** - US defaults and cheat sheet
* **Beams** - Wood (NDS), Deck Design, Steel (AISC), Cold-Formed Steel, Concrete (ACI)
* **Columns** - Wood, Concrete, Steel
* **Connections** - Steel base plates
* **Foundations & Retaining Walls** - Spread footings, wall footings, retaining walls
* **Walls & Slabs** - Wood shear walls, masonry walls, one way slabs
* **Loads** - Wind, seismic, snow

For code-agnostic analysis tools (beams, portal frames, trusses), see [Analysis Calculators](/calculations/general_analysis_calculations/home).

## 💡 Need Help?

<CardGroup cols={2}>
  <Card title="FAQ" icon="help-circle" href="/learn_calcs/faq/common_errors_and_how_to_fix_them">
    Find answers to common questions
  </Card>

  <Card title="Contact Support" icon="headset" href="/contact_us">
    Get help from our support team
  </Card>
</CardGroup>