Shop Notes
A handful of old ideas from math and nature that tend to earn their keep at the bench. Not rules — just things worth knowing the next time you’re laying out a cut or fitting a joint.
When you have to pick a proportion and nothing else decides it for you, the golden ratio is a safe default. The long side relates to the short side by about 1.6 to 1 — close enough that stepping off five units against three gets you there by eye.
It earns its keep wherever a shape should look settled rather than accidental: the height of a box against its width, a tabletop against its overhang, the rails and panel of a door. None of it is magic — the wood doesn't care about the number — but a rectangle near 1.6 to 1 reliably reads as composed, and it spares you from second-guessing a dimension you had no other reason to choose.
Stacking graduated drawers? Multiply each drawer's height by about 1.6 as you work down the run. The stack reads as deliberate instead of random, and the math takes about ten seconds.
Bees tile their comb in hexagons because it is the cheapest wall they can build: hexagons pack with no wasted space and enclose the most area for the least material. Borrow the idea whenever weight is the enemy.
A panel made of two thin skins with a light core between them — hex cells, or even a plain grid — keeps almost all the stiffness of a solid slab at a fraction of the weight. It is how hollow-core doors and torsion-box benchtops stay dead flat without being backbreaking. The trick isn't the hexagon itself; it's two thin faces held apart by a light, evenly spaced core.
You've already met this one. The cardboard honeycomb inside a cheap hollow door is doing real structural work — skin it in veneer and it's stiffer than it has any right to be.
Two things worth remembering about the slot your saw leaves behind.
First, it’s real width — about an eighth of an inch — and it’s gone for good. Cut several parts from one board and those kerfs add up; leave them off the cut list and you’ll come up a part short. Cut to the waste side of the line, every time.
Second, you can put it to work. A row of closely spaced kerfs cut most of the way through lets a stiff board fold into a smooth curve — a curved apron, a column, a lampshade. Closer spacing or deeper cuts give a tighter radius.
Spacing sets the radius — tighter kerfs bend tighter. Saw a few into an offcut of the same stock and bend it before you commit. Faster than guessing, and cheaper than a cracked workpiece.
Glue is the newcomer. For most of furniture’s history a joint had to resist movement on its own — and the methods that did it still outlast glue today. Three tricks do most of the work: squeeze the parts together, shape them so they can’t slide apart, or bridge a weak line with a stiffer piece.
The tenon runs clear through its mortise; wedges driven into its end spread it to fill a mortise cut slightly wider at the far face. A dovetail formed inside the joint — it can't back out.
Bore the peg hole in the tenon a hair closer to the shoulder than the holes in the mortise. Drive a peg and the offset drags the shoulder tight — and holds it there for good, no clamps or glue.
Run the tenon long, cut a slot through the part that stands proud, and drive a tapered key down against the post. The key pulls the joint tight — then knocks back out when you need to move the piece.
Flared tails and pins that only assemble one way and refuse to pull apart in the other. It's why a century-old drawer still survives being yanked open.
A dovetailed tongue slides into a matching groove. A shelf goes in from one end but can't be pulled straight out — and it stiffens the whole case against racking.
A bowtie inlay set across a seam or a check in a wide slab. The flared ends seat in both sides, so the gap can't widen. Half repair, half decoration.
Wood never stops moving with the seasons, so the trick isn't to fight it everywhere — it's to lock the joint where it counts and let the wood breathe everywhere else. Pin it in one place, not ten.