> 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/concrete-segmental-bridge-workflow/tendon-cbs/draped-tendon-cbs.md).

# Draped Tendon \[CBS]

A Draped Tendon follows a curved (draped) profile across several segments, dipping toward the soffit at midspan and rising near the piers. Its transverse and vertical paths are entered per segment.

## Layout

**Section Vert. Reference Edge \[Top=1/Bottom=2]:** Edge of the segment cross-section the tendon's vertical offsets are measured from (default: Top=1).

**Transverse Tendon Path:** Table describing the tendon's transverse (horizontal) layout. Each row gives the segment, station and offset, together with the variation applied between control points.

**Vertical Tendon Path:** Table describing the tendon's vertical (elevation) layout. Each row gives the segment, station and offset, together with the variation applied between control points.

**Local Coord. X Offset:** Offset applied to the tendon path along the local X axis (default: 0).

**Local Coord. Y Offset:** Offset applied to the tendon path along the local Y axis (default: 0).

**Local Coord. Z Offset:** Offset applied to the tendon path along the local Z axis (default: 0).

**Set Tendon Pattern Symm. about ℄ Segmental Box\[YES=1/NO=0]:** When YES, the tendon pattern is mirrored about the centerline of the segmental box (default: NO=0).

**Reference Tendon:** An existing tendon this one takes its pattern from.

## 3D Reference

**Girder:** The girder the tendon runs along.

**Reference Support Line (for Girder):** Support line the tendon's stations are measured against.

**Section Reference Point (for Girder) \[Top Center of the Section=1/Bottom Center of the Section=2]:** Point of the girder section the tendon offsets are measured from (default: Top Center=1).

**Section Reference Point (for Cap, Starts From Right) \[Top Center of the Section=1/Bottom Center of the Section=2]:** Reference point used when the tendon runs through a cap (default: Top Center=1).

**Section Reference Point (for Column, Starts From Top) \[Center of the Section=1/]:** Reference point used when the tendon runs through a column (default: Center=1).

## Properties

**Material:** Material assigned to the tendon.

**Post-tension Type \[Bonded=0/Unbonded=1]:** Whether the tendon is bonded to the surrounding concrete after grouting (default: Bonded=0).

**Exposure \[Internal=0/External=1]:** Whether the tendon runs inside the concrete section or outside it (default: Internal=0).

**Anchor Set Length:** Anchor set (draw-in) length at the stressing anchorage (default: 0.375).

**Wobble Friction Coefficient:** Wobble friction coefficient used in the friction loss computation (default: 0.0002).

**Curvature Friction Coefficient (1/rad):** Curvature friction coefficient used in the friction loss computation (default: 0.18).

## Jacking

**# of Strands:** Number of strands in the tendon (default: 31).

**Strand Type:** Strand product assigned to the tendon.

**Jacking Method: Jacking type \[Start=0/End=1/Start then End=2/End then Start=3]:** Selects which end (or order of ends) the tendon is stressed from (default: Start=0).

**Jacking Force From Start: applied jacking force to the start of tendon.:** Jacking force applied at the start end (default: 1362.22).

**Jacking Force From End: applied jacking force to the start of tendon.:** Jacking force applied at the end (default: 0).

## FEA Settings

**Load Dist. Elem. Type\[FENodes=0/FELines=1]:** Whether the tendon force is distributed onto finite-element nodes or lines (default: FELines=1).

**Percent Loss (%):** Additional percentage loss applied to the tendon force (default: 0).

## 3D Settings

**Show Tendon(Detailing)\[NO=0/YES=1]:** When YES, the tendon is drawn in the 3D view (default: YES=1).


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