Between the size on the drawing and the board you put on the saw there are three allowances, and not one of them can be argued down. Estifex works them out in that order and shows both sizes side by side — so the person at the saw can see how much allowance he has.
Rounding up, you read 26. With the 4 mm the planer takes it needs 27 — and the board is 32. So a blank of 630 × 100 × 23 is bought as 700 × 110 × 32. That one step in a chair is seventeen per cent of the timber, every time, in every chair.
A sheet is not a board. Plywood and MDF come in a fixed thickness and are charged by area. +10 mm each way for the saw and the edge, no more.
When no production board reaches the thickness, Estifex stops. Whether to glue in the thickness (a block) or across the width (a panel) is the workshop’s decision.
The defect percentage belongs to the material and is added to the cubature at the end, never to the dimensions: a knot does not make the blank longer. A sheet has no defects, so the percentage is not offered there at all.
A turned leg is drawn at 420 mm and written up as a blank of 440 × 45 × 45, because 20 mm of it is in the chuck. Anyone who puts 420 on the cutting list as the lower limit cuts short.
Then Estifex says so and asks, instead of quietly inventing a board. Glued in the thickness or across the width? Until somebody answers, that part is not priced, and the price says it is missing.
Where a sheet states the blank the workshop cuts. A turned leg drawn at 420 mm and written up as 440 × 45 × 45 is priced on the 440: the segments alone would say the part fits where it does not.
Price
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