Assembly recipes
The four preset assemblies
Each item is worked out for one unit of the measurement, then waste is added and, if ticked, it's rounded up. Times multiplies the results. Formulas can use Qty, Length, Area, Perimeter, Count, Height, Depth, Volume and the variables. How assemblies work.
Stud partition on a length along the wall line
Variables: Height = 2.4, Spacing = 0.6, SheetWidth = 1.2, SheetHeight = 2.4, Sides = 2
| Item | Unit | Formula | Waste | Round up |
|---|
| 12.5mm plasterboard sheets | nr | Length * Height * Sides / (SheetWidth * SheetHeight) | 10% | Yes |
| Metal studs at centres | nr | ceil(Length / Spacing) + 1 | 0% | |
| Head and floor track | m | Length * 2 | 5% | |
| Drywall screws (approx. 30 per m2 per side) | nr | Length * Height * Sides * 30 | 10% | Yes |
| Joint tape | m | Length * Height * Sides * 1.6 | 10% | |
| Labour | hr | Length * Height * 0.45 | 0% | |
Concrete slab on an area
Variables: Thickness = 0.15, MeshLap = 0.1
| Item | Unit | Formula | Waste | Round up |
|---|
| In-situ concrete C32/40 in slab | m3 | Area * Thickness | 5% | |
| A393 mesh reinforcement | m2 | Area * (1 + MeshLap) | 0% | |
| 1200 gauge DPM | m2 | Area | 10% | |
| Edge formwork | m | Perimeter | 0% | |
Block wall on a length along the wall line
Variables: Height = 2.4, BlocksPerM2 = 10
| Item | Unit | Formula | Waste | Round up |
|---|
| 100mm dense concrete blockwork | m2 | Length * Height | 0% | |
| Blocks | nr | Length * Height * BlocksPerM2 | 5% | Yes |
| Mortar | m3 | Length * Height * 0.01 | 10% | |
| Wall ties / reinforcement every 3rd course | m | Length * ceil(Height / 0.675) | 5% | |
Skirting on a length along the wall line
Variables: Doors = 0, DoorWidth = 0.9, BoardLength = 4.2
| Item | Unit | Formula | Waste | Round up |
|---|
| MDF skirting board | m | max(0, Length - Doors * DoorWidth) | 10% | |
| Skirting lengths | nr | max(0, Length - Doors * DoorWidth) / BoardLength | 10% | Yes |
| Decoration to skirting | m | max(0, Length - Doors * DoorWidth) | 0% | |