Safety
The drafter
never touches the saw.
Which is exactly why this page exists. Most of what makes a shop dangerous was decided on a drawing, weeks earlier, by somebody who will never be in the room.
A drafter never touches the saw. That is exactly why this page exists: almost every decision that makes a shop dangerous was made on a drawing, weeks earlier, by somebody who will never be in the room when it goes wrong.
It is not a substitute for your regulator, your employer's procedures, or training on the machine in front of you. Exposure limits, guarding requirements and codes of practice differ by country and change, so this page names the body that publishes them rather than printing a number that will quietly go out of date. Every source is linked.
Wood dust is a carcinogen. That is a classification, not an opinion.
The International Agency for Research on Cancer classifies wood dust in Group 1 — carcinogenic to humans, in Monographs Volume 100C, Arsenic, Metals, Fibres, and Dusts. Group 1 is the same category as asbestos and benzene. It describes the strength of the evidence that the agent causes cancer, not how likely you are to get it from one afternoon.
The association is strongest for cancers of the nasal cavity and sinuses. The exposure that matters is cumulative and invisible: years of fine dust, not the shower of chips you can see.
What follows from that on a drawing:
- MDF and other composites make the finest dust, and a drawing full of routed profiles and shaped edges is a drawing that creates a lot of it. Specify the profile because the design needs it, not out of habit.
- Machining on site is the worst case, because site extraction is whatever fits in a van. Anything you can resolve in the shop — a scribe, a filler, a cut-to-size panel — is dust that never gets made in an occupied building.
Primary source: IARC Monographs Vol. 100C. Practical guidance: HSE woodworking.
Machinery
Guarding, riving knives, push sticks, and training on the specific machine are the whole of it, and none of it is a drafter's decision. Your regulator publishes the requirements: HSE (UK), OSHA (US), Safe Work Australia, CCOHS (Canada).
What is a drafter's decision is whether a part can be machined safely at all. A component that has to be held by hand because it is too small for a jig, or fed against the cutter because of the way the profile runs, is a drawing problem long before it is an operator problem.
Noise
Hearing loss from machinery is cumulative, permanent and painless while it is happening, which is why it is the injury people take least seriously. Your regulator sets the action levels. Nothing on a drawing changes them, but the number of machining operations a design demands is on the drawing.
Finishes
Two-pack polyurethane finishes contain isocyanates, which are respiratory sensitisers: once someone is sensitised, exposures that never troubled them before can trigger asthma, and it does not go away. Spray finishing is the high-exposure operation, and it is the one people do in a booth at the back with the door open.
The specification decides the finish. If the drawing can carry a factory-applied or lower-hazard finish and meet the design intent, that is a real decision with a real consequence for somebody's lungs. Check the product's own safety data sheet — it is the manufacturer's document and it is the authority here.
Weight, and the part of this a drafter actually controls
This is where the drawing has the most leverage, and it is almost never discussed as safety:
- Full sheets and stone tops are two-person items or they are an injury. If a panel arrives at a size that needs two people and the crew is one, it gets lifted anyway.
- Splits belong on the drawing. If a run will not fit through the door, round the corner, or into the lift, the split is either designed and detailed or it is improvised on site with a circular saw and no extraction.
- Lifting points and temporary support for anything heavy, tall or top-heavy. A tall unit that cannot stand up on its own until it is fixed is a thing that falls on somebody.
- Access. Work that can only be installed from a ladder, over a stairwell, or above head height for an hour is a design decision about somebody's back and somebody's balance.
- Serviceability. If it can never be taken apart, somebody will one day take it apart badly.
None of this shows up in a specification. All of it shows up on site.
The honest summary
The drafter's contribution to safety is not remembering to write "wear PPE" in the general notes. It is refusing to draw things that can only be built dangerously, and resolving in the shop what would otherwise be improvised in an occupied building by somebody with a deadline.
Sources
- IARC Monographs Vol. 100C, Arsenic, Metals, Fibres, and Dusts — the wood dust classification. publications.iarc.who.int/120
- HSE woodworking (UK) — machinery, dust and noise guidance. hse.gov.uk/woodworking
- OSHA (US), Safe Work Australia, CCOHS (Canada) — the equivalent bodies in each jurisdiction.
- Manufacturers' safety data sheets for any finish — the authority on that product, and the only one.
Everything on this page about what a drawing controls is reasoning from the drawing sets, not a citation. It is offered as an argument, and it should be argued with.