A cabinet plan is not a picture of a cabinet. It is a set of decisions already made for you, and the useful ones are stated before the first dimension. Here is the checklist we hold our own plans to.
1. Footprint, including what the doors need
A 24 × 16 × 36 cabinet needs 24 in of wall and 16 in of floor, plus clearance for the doors if it has any. Ours is an open carcase for exactly this reason: in a one-car garage the swing of a door is often the difference between a cabinet and a trip hazard. If a plan lists only the outside dimensions, ask what the working footprint is.
2. Fixed shelves or adjustable — and why the plan chose
Fixed shelves sit in 3/8 in dados cut into the sides. They carry more, they keep the carcase square during glue-up, and they cannot sag under paint cans. Adjustable shelves use pins or a ladder system: flexible, but each hole is a place for the carcase to rack if the back is thin.
Fixed is the right call for shop storage. If a plan shows adjustable shelving in a garage cabinet, check the back panel thickness before you commit — 1/4 in back plus 3/4 in sides is what keeps it true.
3. The back panel is structure, not decoration
A glued and stapled 1/4 in back is what turns four panels into a box. It also sets the diagonal: measure both diagonals of the carcase before the back goes on, and again after. They should match within 1/16 in. Any plan that treats the back as optional has not thought about racking.
4. Carcase joints: dado, rabbet, or butt and screw
Dados cost setup time and buy you alignment. Butt joints with pocket screws are faster but rely on the operator holding square. For a first cabinet, dados are more forgiving because the groove decides the position for you — that is why the 24 × 16 × 36 cabinet uses them.
5. Hardware count, stated as a number
You should be able to buy everything on one trip. A plan that says "pocket screws as needed" is not a bill of materials. Ours lists counts per joint, plus glue, plus casters where the piece rolls. Compare that against what the plan actually shows — the number on the drawing is the one you will be short of at 9pm.
6. Load, honestly stated
Plywood shop furniture is not structural engineering. A 3/4 in shelf on a 24 in span will carry a row of paint cans without visible sag; a 36 in span will not. If a plan does not tell you the span its shelves were drawn for, assume it was drawn for a lighter load than yours.
The questions worth asking before checkout
- What is the working footprint, including doors and drawer pull-out?
- How many sheets, and what yield does the nesting map claim?
- Are shelves fixed or adjustable, and what carries them?
- What holds the carcase square — back panel, dados, or both?
- How many fasteners, and of what type?
- What load and span was the shelf drawn for?
Every Northpine sheet answers all six on page one, because we got tired of answering them by email. If you want to see the format before buying, ask for the sample PDF or download it from any plan page.