A plasterboard ceiling hung below the structure on top cross rails, with furring channels that carry the boards. Room size and plenum height Board thickness, size and layers Rail, channel and hanger spacing Wall track or none
Category: Plasterboard › Suspended Board Ceilings
By Huu Khanh Nguyen · Updated November 4, 2026
| Name | Default | Unit |
|---|---|---|
| Width | 4800 | mm |
| Depth | 3600 | mm |
| Plenum Height | 1100 | mm |
| Board Layers | 1 | |
| Board Thickness | 13 | mm |
| Board Width | 1200 | mm |
| Board Length | 2400 | mm |
| Board Finish | #ffffff | |
| Furring Channel Spacing | 600 | mm |
| Furring Channel Edge Distance | endClearance + 25.565 | mm |
| Furring Channel Depth | 27.3 | mm |
| Top Cross Rail Spacing | 1200 | mm |
| Top Cross Rail Edge Distance | 200 | mm |
| Top Cross Rail Depth | 26.35 | mm |
| Top Cross Rail Thickness | 0.75 | mm |
| Hanger Spacing | 1200 | mm |
| Hanger Distance From Rail End | 300 | mm |
| Wall Clearance At Member Ends | 10 | mm |
| Stock Length | 3600 | mm |
| Framing Finish | #ffffff | |
| Board Stack | boardLayers * boardThickness | mm |
| Rail Lines | Math.ceil((sizeY - 2 * primaryEdge) / primarySpacing) + 1 | |
| Rail Pitch | (sizeY - 2 * primaryEdge) / (primaryLines - 1) | mm |
| Rail Pieces | Math.ceil((sizeX - 2 * endClearance) / stockLength) | |
| Hangers Per Rail | Math.ceil((sizeX - 2 * endClearance - 2 * hangerEdge) / hangerSpacing) + 1 | |
| Channel Lines | Math.ceil((sizeX - 2 * furringEdge) / furringSpacing) + 1 | |
| Channel Pitch | (sizeX - 2 * furringEdge) / (furringLines - 1) | mm |
| Channel Pieces | Math.ceil((sizeY - 2 * endClearance) / stockLength) | |
| Track Pieces | Math.ceil(sizeX / stockLength) | |
| Face Joint Offset | (boardLayers >= 3 || (boardLayers == 2 && furringSpacing > 450)) ? 1 : 0 | |
| Sheet Bays | Math.floor((boardLength - furringEdge) / furringPitch) | |
| Row Count | 1 + Math.ceil(sizeY / boardWidth) | |
| Column Count | 2 + Math.ceil((furringLines - 1) / sheetBays) |