You’ve no doubt heard the carpentry proverb “Measure twice, cut once” and may even have made it a mantra for your own projects. But unless you know how to use a tape measure and correctly read its ...

You already know that the highlighted numbers (16, 32, 48…) are for laying out studs, joists or rafters every 16 in. But what’s the deal with those little diamonds or triangles? They’re ‘truss marks’ ...