Scarf joint
A scarf joint lengthens a beam: both ends get the same angled plane with a square abutment, so they hook into each other.
When to use it
Section titled “When to use it”Use it for purlins and wall plates that must be longer than your timber. The abutment lets the joint take tension and stops the halves sliding. Put the same joint, mirrored, on the other end.
Fields
Section titled “Fields”| Field | Unit | Range or options | Default | What it changes |
|---|---|---|---|---|
| End | Start, End | End | ||
| Position X | mm | from 0 | 3000 | The end face the joint sits on. |
| Length | mm | from 1 | 300 | How far the joint runs into the beam. |
| Inclination | ° | 1 to 89 | 33.7 | Inclination of the scarf plane relative to the beam axis. |
| Lip length | mm | from 0 | 175 | Length of the first plane, measured ALONG the slope, not horizontally. |
| Lip depth | mm | from 0 | 17 | Depth of the abutment, square to the scarf plane. |
| Depth opposite side | mm | from 0 | 20 | How deep the joint starts at the root, measured from the opposite side. |
| Drill holes | 0 to 2 | 0 | Number of dowels through the joint (0, 1 or 2). | |
| Face | Top, Bottom, Front, Back | Bottom | The side of the part the processing is on. |
Default: what Add fills in on a 3000 mm part of 120 x 120 mm.
Add a scarf joint
Section titled “Add a scarf joint”- Select the part in the Parts list.
- Under Extra processings, click Add.
- Type
scarfin the search field and pick Scarf joint. - Set Face, End and Position X.
- Set Length, Inclination, the lip values and the number of Drill holes.
- Check that the part shows a green check. If not, open the Issues tab.
Machine export
Section titled “Machine export”| Format | Status | Details |
|---|---|---|
| BTLx | Supported | ScarfJoint. |
| BVN (Hundegger) | Not written | Refused: the inclination mapping is missing. |
| BVX2 (Hundegger) | Not written | Refused: the inclination mapping is missing. |
A file that the app writes is not a check by your machine. See Export for what each format is for.