BUILDING & PLANNING · FIELD TOOL
An exposed 600 × 600 grid ceiling needs main runners every 1.2 m, 1200 mm cross tees every 600 mm and 600 mm tees between them. An 8 × 6 m room (48 m²) takes about 147 tiles, 13 main runners, 74 of each cross tee, 11 lengths of wall angle and 37 hangers, with 10% extra.
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| Main runners (3.6 m) | 13 (40 m) |
| 1200 mm cross tees | 74 |
| 600 mm cross tees | 74 |
| Wall angle (3 m) | 11 (28 m) |
| Hangers | 37 |
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| Item | Per m² of ceiling |
|---|---|
| Main runner | 0.83 m (1 ÷ 1.2) |
| 1200 mm cross tee | 1.67 m (1 ÷ 0.6) |
| 600 mm cross tee | 0.83 m (1 ÷ 1.2) |
| Tiles | 2.78 |
| Hangers | 0.69 |
| Wall angle | perimeter |
8 × 6 m room (48 m², 28 m perimeter), 10% extra:
About 2.78 tiles of 600 × 600 mm per square metre (1 ÷ 0.36), plus 10% for cuts at the walls.
Typically about every 1.2 m along each main runner (1.2 × 1.2 m grid), and within about 150 mm of runner ends. Follow the grid maker's system.
A concealed metal-furring plasterboard ceiling: primary channels hung from the soffit, furring sections fixed below them, and plasterboard screwed to the furring.
