# Cross Frame Code Check (AASHTO) \[STG]

## General

**Cross Frame:** Cross frame for code check

**Code Check Template:** The code check template is utilized to extract global parameters, results from finite element analysis, and limit states employed in the design process.

**Straight/Curved\[Straight Bridge/Curved Bridge]:** This parameter defines the bridge type. \[Straight Bridge=1/Curved Bridge=2]

**PDF Name (Export):** This parameter allows the name of the code check document to be modified when saving it as a PDF. When renaming the file, special attention must be given to the text characters on the [linked](https://docs.openbrim.org/faq/general/faq-illegal-chars) page, as certain characters may interfere with parametric equations and lead to unexpected results.

## Shear Lag Factor

To perform **fatigue and tension fracture check calculations** per AASHTO 9th Edition (Condition 7.2, Table 6.6.1.2.3-1 and 6.8.2.2), inputs for connection eccentricity and the maximum length of longitudinal welds are required. Therefore, the effective area can be determined by the formula ***Aeff = (1-x/L)Ag*** where x represents the connection eccentricity, L is the maximum length of the longitudinal welds and *Ag* denotes the gross area of the section.

![CrossFrameFatigue.jpg](https://openbrim.atlassian.net/wiki/download/attachments/2127134745/CrossFrameFatigue.jpg?api=v2)

These parameters, connection eccentricity (x) and maximum length of longitudinal welds (L), can be separately specified for the top chord, bottom chord, and diagonal chord.

**Top Chord Connection Eccentricity:** Specify the connection eccentricity (x) for top chord.

**Top Chord Max Length of the Longitudinal Welds:** Specify the maximum length of the longitudinal welds (L) for top chord.

**Bottom Chord Connection Eccentricity:** Specify the connection eccentricity (x) for bottom chord.

**Bottom Chord Max Length of the Longitudinal Welds:** Specify the maximum length of the longitudinal welds (L) for bottom chord.

**Diagonal Chord Connection Eccentricity:** Specify the connection eccentricity (x) for diagonal chord.

**Diagonal Chord Max Length of the Longitudinal Welds:** Specify the maximum length of the longitudinal welds (L) for diagonal chord.

**Vertical Strut Connection Eccentricity:** Specify the connection eccentricity (x) for vertical strut.

**Vertical Strut Max Length of the Longitudinal Welds:** Specify the maximum length of the longitudinal welds (L) for vertical strut.


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