Cabinets
Cabinet Carcass Construction Basics for Beginners
Cabinet carcass basics: sides, top, bottom, back, and shelves, how the box goes together, and how to plan the panels into a clean plywood cut list.
Research Lens
How can a personal builder use CutList to finish cabinet carcass construction basics for beginners with fewer mistakes?
The hobby workflow is strongest when the app is used as a planning checkpoint: define the project, enter accurate stock and parts, generate a visual layout, then use cost, waste, grain, kerf, PDF export, project history, and offline access to control the real cutting session.
Decision Metrics
What a Carcass Is
The carcass is the box: two sides, a top and bottom (or stretchers), a back, and any fixed shelves. Everything else, doors, drawers, face frame, hangs on or sits inside it. Get the carcass square and the right size and the rest follows. Most cabinet cut lists start by listing these carcass panels first.
Sides Drive the Dimensions
The two side panels set the cabinet's height and depth. Their height is the finished cabinet height (minus top and bottom thickness depending on joinery), and their depth is the cabinet depth minus the door and face-frame allowance. Get the sides right and the box is most of the way there.
Joining Top, Bottom, and Back
The top and bottom (or stretchers on a base cabinet) tie the sides together and set the width. They are usually joined with dados, screws, or pocket holes. The back panel, often 1/4-inch plywood in a rabbet or groove, keeps the box square and adds rigidity. A loose or missing back lets a cabinet rack out of square.
Allowing for Joinery in the Cut List
Panel sizes depend on the joinery: a dado-and-rabbet box cuts parts differently than a butt-jointed, screwed box. Decide the joinery first, then size the panels so the assembled box hits the target dimensions. This is the single most common source of cabinet cut-list errors.
From Carcass to Cut List
Once you know the box dimensions and joinery, listing the parts is straightforward: 2 sides, top and bottom, back, fixed shelves, plus any nailers or stretchers. Group identical parts, set kerf, and lay them on sheets. A template gets you a working list fast.
Compare
Carcass parts at a glance
| Part | Sets | Typical material | Note |
|---|---|---|---|
| Sides (2) | Height, depth | 3/4 in plywood | Drive dimensions |
| Top / bottom | Width | 3/4 in plywood | Tie sides together |
| Back | Squareness | 1/4 in plywood | In a rabbet/groove |
| Fixed shelf | Rigidity | 3/4 in plywood | Optional |
Field Checklist
- List the carcass panels before anything else.
- Let the side panels set height and depth.
- Use a back panel to keep the box square.
- Choose joinery before sizing the panels.
- Group identical carcass parts in the cut list.
FAQ
Common questions
What is a cabinet carcass?
The basic box: two sides, top and bottom or stretchers, a back, and fixed shelves. Doors, drawers, and the face frame attach to it.
What thickness plywood for a cabinet carcass?
Usually 3/4 inch for the sides, top, bottom, and shelves, with a 1/4-inch back panel in a rabbet or groove.
How do I keep a cabinet box square?
Fit a back panel into a rabbet or groove. It locks the box square and adds rigidity that a loose back cannot.
Why does joinery change my cut list?
Dados, rabbets, and butt joints each require different panel sizes to reach the same finished box, so decide joinery before sizing parts.
What is the fastest way to plan a cabinet cut list?
Start from a cabinet template, set your dimensions and joinery, then lay the parts out on sheets with a calculator.
Sources