> For the complete documentation index, see [llms.txt](https://docs.openbrim.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openbrim.org/templates/bebo-precast-arch-bridge-workflow/barrier-bebo.md).

# Barrier \[BEBO]

The Barrier object places a barrier along the edge of the roadway carried over the arch structure.

## Barrier

**Section:** Cross-section of the barrier.

**\[Left=1/Right=2]Orientation:** Side of the roadway the barrier is placed on, which also fixes the direction its face is battered toward (default: Left=1).

**Roadway:** The roadway the barrier runs along. The barrier follows this roadway's alignment and profile.

**Start Station Option\[Roadway Start=1/Input=2]:** Chooses whether the barrier starts at the roadway start or at a station entered below (default: Roadway Start=1).

**Start Station:** Station where the barrier begins. Applicable when Start Station Option is Input (default: 0).

**Start Skew:** Skew angle applied to the start face of the barrier (default: 0).

**End Station Option\[Roadway End=1/Input=2]:** Chooses whether the barrier ends at the roadway end or at a station entered below (default: Roadway End=1).

**End Station:** Station where the barrier ends. Applicable when End Station Option is Input (default: 0).

**End Skew:** Skew angle applied to the end face of the barrier (default: 0).

**Start Transverse Location\[Left/Right]:** Transverse position of the barrier at its start.

**End Transverse Location\[Left/Right]:** Transverse position of the barrier at its end.

**Offset from Roadway Edge:** When the barrier follows the roadway edge (both transverse locations set to 'Left', or both to 'Right'), this sets the barrier back inboard from that edge. Entered in inches, default 0 — which keeps the barrier on the edge as before. The setback is applied at every point, so it holds along a variable-width roadway. Marked N/A when a numeric transverse location is used instead; negative values are not accepted.

## Geometry

**Cross‐Slope Reference\[At Each Point=0/Left Edge=1/Right Edge=2]:** Defines the reference used for the barrier bottom slope (default: At Each Point=0).

**Section Change in Reverse Dir.\[NO=0/YES=1]:** When YES, the barrier section is reversed (default: NO=0).

**Expansion Joint Data:** Table of expansion joint locations along the barrier.

**Notch Thickness:** Thickness of the notch at the base of the barrier.

## Quantities

**Section Area:** Cross-sectional area computed from the assigned section. (Read-only)

**Cross Section Perimeter:** Perimeter of the assigned cross section. (Read-only)

**Rebar Density(per cubic yard):** Density of reinforcing bars per cubic yard, used to compute the total rebar weight from the barrier volume.

## Referencing Objects

**Rail:** Rail objects attached to this barrier. (Read-only)


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