By Huu Khanh Nguyen · Updated October 29, 2026 · timber, fence, diamond rail, knee rail, birds mouth, demarcation, post and rail, boundary
A low demarcation fence of square timber posts with a notched top, each carrying a square rail turned on its corner. Post height Post spacing Timber species or colour
| Name | Default | Unit |
|---|---|---|
| Run Length | 4150 | mm |
| Width | 100 | mm |
| Fence Height | postHeight - 50 + 70 * Math.sqrt(2) | mm |
| Post Spacing | 1350 | mm |
| Distribution | count | |
| Post Height | 450 | mm |
| Finish | white | |
| minPitch | 100 + 70 | mm |
| span | sizeX - (100) | mm |
| bayCount | Math.max(1, Math.ceil(span / bayWidth - 1e-9)) | |
| lastBay | span - (bayCount - 1) * bayWidth | mm |
| merged | distribution == 'distance' && bayCount > 1 && lastBay < minPitch |