# WS AASHTO \[PIG]

## Geometry

**Span Height Variation \[Yes/No]:** Yes applies a span-by-span height variation when calculating wind pressures; No uses a single height for the whole bridge.

**Structural Objects And Pressure Parameters:** Table of structural objects (girders, diaphragms, etc.) and the wind-pressure parameters that apply to them.

**Substructure Objects and Pressure Parameters:** Table of substructure objects (piers, bents) and the wind-pressure parameters applied to each.

**Superstructure Objects and Pressure Parameters:** Table of superstructure objects (deck, barriers) and the wind-pressure parameters applied to each.

## Wind Parameters

**\[NAME\_ALIAS:V]Strength III Design Wind Speed (mph):** Design wind speed (mph) used for the AASHTO Strength III limit state. Typically 115 mph per AASHTO 3.8.1.1.

**Surface Roughness/Wind Exposure Category \[B/C/D]:** AASHTO wind exposure category selector per AASHTO 3.8.1.1: B for urban/suburban, C for open terrain, D for flat unobstructed areas and coastal waters.

**Analysis Option \[Generate Stages for All Load Combinations/Generate Strength III and Strength V Apply Coefficients]:** Controls how the library object builds staged load cases — either a single combination stage (option 0) or separate combination stages with the relevant AASHTO coefficients applied (option 1).

**Generate Wind Load Report \[Yes/No]:** When Yes, a detailed wind-load report is produced during analysis.

## Load Case Generators

**Generate Strength III Load Cases: \[Yes/No]:** Enable Strength III wind-load cases.

**Generate Strength V Load Cases: \[Yes/No]:** Enable Strength V wind-load cases.

**Generate Service I Load Cases: \[Yes/No]:** Enable Service I wind-load cases.

**Generate Service IV Load Cases: \[Yes/No]:** Enable Service IV wind-load cases.

**Generate 0 Degrees Angle Load Cases: \[Yes/No]:** Enable wind load cases at 0-degree skew.

**Generate 15 Degrees Angle Load Cases: \[Yes/No]:** Enable wind load cases at 15-degree skew.

**Generate 30 Degrees Angle Load Cases: \[Yes/No]:** Enable wind load cases at 30-degree skew.

**Generate 45 Degrees Angle Load Cases: \[Yes/No]:** Enable wind load cases at 45-degree skew.

**Generate 60 Degrees Angle Load Cases: \[Yes/No]:** Enable wind load cases at 60-degree skew.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.openbrim.org/templates/precast-i-girder-bridge-workflow/loading-pig/loads-pig/wind-load-pig/wind-load-on-structure-pig/ws-aashto-pig.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.