Inside the Boxes — Pull-Outs, Bins and What You Actually Reach

An accessory belongs to a cabinet, not to a kitchen

The rule that governs everything below: a pull-out is built for one nominal box width and fits nothing else. A unit made for a 15″ cabinet does not go into an 18″ cabinet with a packer either side. The carriage screws to the side panels or to the floor at fixed centres, the face has to land flush with the fronts on both sides of it, and three inches of air has to go somewhere you can see.

Start with the subtraction, because half the confusion in this subject is people comparing two different numbers. A frameless box is two ¾″ side panels and the space between them, so the clear interior is the nominal width less 1½″. A 15″ box is 13½″ inside; an 18″ box is 16½″. Accessory makers quote the cabinet size on the box and the carcass opening in the fitting instructions, and the two numbers differ by an inch and a half every time. Read which one a listing is giving you before you buy anything.

What they search at midnight “kitchen cabinet organization ideas” — usually about a fortnight after the cabinets landed, with the boxes already screwed to the wall and the interiors exactly as they will be for the next twenty years.

Which leads to the part that surprises people: in our own catalogue, most accessories are not accessories at all — they are cabinets. The trash base is a cabinet. The spice pull-out is a cabinet. The easy-reach corner is a cabinet. What you are choosing is not a gadget to slide in later; it is which box occupies that stretch of wall, which means it competes for width with everything else on that run. A 9″ spice pull-out is 9″ that a drawer base does not get.

The handful that genuinely drop into an existing box are scoped just as tightly. The under-sink bin fits three sink bases and no others. The arena trays fit the two easy-reach corners. The blind-corner pull-out fits one blind cabinet and not its smaller sibling. There is no universal part in this trade, and “fits most cabinets” on a retail listing means it fits the widest interior and rattles in everything narrower.

Twenty-four inches deep, and the last eight of them

Every base cabinet in a normal kitchen is 24″ deep, with a countertop about 25½″ deep once the 1½″ overhang is allowed for. Take the back panel and its rails off the inside and you have roughly 22″ of clear interior front to back. That number is the same whether the front is a door or a drawer. What changes completely is how much of it reaches you.

Behind a door, the geometry is against you from the start. The counter nose is 36″ off the floor and stands proud of the door face, so from a standing position you cannot see into a base cabinet at all — not the shelf, not the floor, nothing. You crouch, and from a crouch your sight line clips the front edge of the shelf and shows you about the first foot. Past that you are working by memory and by feel, with one shoulder in the opening.

Call it fourteen inches you use and eight inches you forget. Those eight inches are not a rounding error. On a 30″ box that is 28½″ of clear width by 8″ of depth — about 1.6 square feet of floor per cabinet. Six base cabinets along a wall and you own roughly ten square feet of storage that functions as an archive: the ice-cream maker, the second wok, a stock pot that was used once.

A drawer inverts the whole thing. The box travels to you, so instead of reaching in from the side you look down on the contents from above, which is the only viewing angle in a kitchen that shows you everything at once. The far end of the box arrives at the cabinet face and the back of the drawer is as usable as the front.

One condition, and it is worth asking any supplier about by name: full extension. Ours are undermount and full extension as standard, but the word is not free everywhere. A runner that travels three-quarters of the drawer length leaves the back 5 or 6″ of the box still inside the cabinet, in shadow, under the countertop — which reintroduces the exact problem the drawer was built to solve, inside the one box that was supposed to have solved it.

The honest counter-argument is that drawers hold less. A door base is a clear cave; a drawer base spends volume on drawer sides, runners, the gaps between fronts and the space above each stack. You get less cubic capacity and you use all of it, against more capacity of which you use about two-thirds. That is the trade, and for base cabinets it is not close. Chapter 02 argues drawers against doors at the layout level — this page stays inside the box.

The bin is a cabinet, and it has to be the right one in the right place

Nobody draws the bin. It is the most-used fitting in the room — you open it more often than any drawer in the kitchen, and you can settle the argument by counting your own trips to it over one dinner — and it routinely gets assigned to whatever cabinet is left over.

Width first. As a general rule a 12″ to 15″ box carries one bin, an 18″ box carries two side by side, and 21″ or 24″ carries two large ones with room for the carriage. Our own catalogue keeps it simple and skips the single: the trash bases are BTC18 and BTC24, and both are two-bin cabinets. BTC24 is a sales-only size, so it is not in the public catalogue or the search box; you ask for it. Two bins is the right answer in almost every kitchen anyway — the second bin is what makes recycling happen, because a bin in a different room is a bin you do not use.

Then the thing that catches everyone: the bin takes the top drawer with it. A base box is 34½″ tall, of which 4½″ is toe kick, leaving a 30″ face. A two-bin carriage, its frame and the clearance the lids need want about twenty of those thirty inches, and there is nowhere else on the box to put them, so the face of a trash base is a shallow drawer over one full pull-out front. On our BTC cabinets the drawer you keep is the 6″ one — the same front as the top drawer of a three-drawer base. It holds foil, wraps, bin liners and cloths. Nothing stands up in it.

That is also the reason this is a dedicated cabinet rather than a bin dropped into a standard 18″ base. A retrofit bin behind a hinged door has to clear three things on its way out: the door itself, the hinge cups bored into it, and the hinge plate on the side panel. The carriage ends up roughly 2″ narrower than the opening, and the door has to swing clear of the opening altogether — a 155° hinge, not the standard 110° — so if a handle, a wall return or a fridge beside it stops that leaf short, the bin will not come out square. A purpose-built trash base deletes the problem: the bin front is the front, on runners, with no door in the way.

Placement is the other half, and it is a plan decision, not a cabinet decision. The bin wants to be within one pace of the sink and on the opposite side from the dishwasher. The working sequence is scrape, rinse, load: scraping happens over the bin, rinsing at the sink, loading into the machine. Put the bin on the dishwasher side and you reverse across yourself at every plate.

Then check the collision that nothing will check for you. An open dishwasher door takes about 24″ of aisle. If the bin is the cabinet next door, every trip to the bin means closing the machine first — a small irritation that happens a dozen times an evening for as long as you own the kitchen. Keep at least one cabinet between them, or put the bin on the far side of the sink.

• One pace from the sink — measured from where you stand to scrape, not from the middle of the room.
• Not beside the dishwasher — and check the run opposite as well: with 24″ of door on the floor and a body in front of it, an aisle under about 42″ puts the bin out of reach from that side too.
• Not at the end of an island where a stool sits — someone is always sitting there at the moment you need it.
• Not in a corner run — you cannot stand square to it, and a full bin pulled out at an angle is how liners split.
• Check what is above it — a drawer over the bin that you have to close before the bin opens is a design you will notice daily.

The trap gets first refusal on the sink base

The sink base is the only cabinet in the kitchen whose contents were decided by a plumber. Everything you want to put in it is competing with a fixed object that arrived before you did and cannot be moved without a licensed trade.

The shape of that object, in numbers: the waste stub usually leaves the wall 18–20″ off the floor. A 10″ bowl in a 36″ counter puts the underside of the sink at roughly 24¾″. Between those two figures hang the strainer, the tailpiece and the trap, and a food waste disposer adds a steel cylinder under the bowl — the smallest common half-horsepower unit is about 11½″ tall and the bigger ones run to 15 or 16″, with the discharge outlet roughly 6″ down. So the plumbing claims a column through the middle-back of the cabinet from about 18″ up to the underside of the top, and the only reliably free space is the floor and the two side zones beside that column.

This is why a sink base is built the way it is. Ours carries a false drawer front and no shelf, and both of those are deliberate. The bowl comes down through exactly where a top drawer would be, so the drawer front is a piece of face that matches the run and opens onto nothing — which is why it carries no handle. A handle there would be a promise the cabinet cannot keep. And no shelf, because a shelf cannot cross the trap: cut it to clear the plumbing and you have two useless flaps.

A purpose-made under-sink bin is the one part designed around that column, and how it is scoped tells you everything. In our catalogue the under-sink bin fits SB33, SB36 and SB42 — and nothing narrower. Read that as an answer to a question you would otherwise have to measure your way to: at 33″ and up there is a usable lane beside the trap once it has taken its share; below that, there is not. It is a two-compartment pull-out a little over a foot wide, sitting on the cabinet floor to one side of the trap, and which side is called out on the order rather than worked out on install day — so look at the plan and decide whether you want it on the dishwasher side or the far side before anybody asks you. Its bins are visibly shallower than a trash base’s, which is the plumbing taking its cut in one number: what fits under a sink is a bin you empty more often. On a 24″ or 30″ sink base the honest answer is a free-standing bin you lift out, or the bin lives somewhere else entirely.

Whatever else you plan for that cabinet, two things will end up in it regardless: the cleaning bottles and something wet — a brush, a cloth, a half-used pack of sponges. Plan a home for both rather than discovering them. Spray bottles are the one case where a rail or a rack on the inside of the door genuinely earns its place, because in a sink base there is no shelf behind the door for it to steal. We do not sell one; it is a fitting you buy anywhere, and the only measurement that matters is that the bottles clear the trap when the door shuts.

Two habits worth building in at the design stage. First, keep the floor of that cabinet clear and liftable: anything screwed down over the plumbing is something you have to unscrew at the exact moment water is arriving, and compression joints do eventually weep. Second, look at that floor once a season. The first sign of a slow leak on a melamine floor is a dark line along a joint, weeks before there is anything you would call a puddle. The plumbing side of all this — stub heights, disposers, trap falls — is in the sink chapter.

Six, nine and twelve inches — what a narrow pull-out is honestly for

The spice pull-out is the accessory people want most and think about least. Ours come as three cabinets — BSR06, BSR09 and BSR12 — and the front is not a drawer but one full-height door screwed to the basket, with the handle up at the top, so the whole cabinet comes at you in one movement. The 9″ and the 12″ take the two-tier soft-close tray unit, specified left-hand or right-hand. The 6″ does not: there is no two-tier unit at that width, so a BSR06 runs on the basket the cabinet itself comes with. BSR06 is also a sales-only size, so it is not in the public catalogue or the search box; if you want the 6″ you ask for it.

Now the arithmetic nobody does before buying. A 6″ box has 4½″ of clear width between its sides, and the carriage and its running clearance take their cut, so the tray you actually load is somewhere around 3½″ wide. A round supermarket spice jar is about 2″ across. That is one file of jars per tier — roughly ten of them along a base cabinet, and whatever the unit gives you in tiers is your multiplier. If you own thirty spices, a 6″ pull-out is not the answer; it is a fraction of the answer, and you will be keeping the rest somewhere else from day one.

Height works the same way. Two tiers split about 30″ of interior into openings of roughly 14″ each once the trays themselves are allowed for. A 10″ or 12″ oil bottle stands on one tier at the cost of what the tier above would have held. Anything taller does not go in at all — which is worth knowing before you picture the tall bottles in there, because they are exactly what people buy one of these for.

Handedness is a real decision, and it is one you make on paper. The tray unit in a BSR09 or a BSR12 is specified left or right when the order is written, and that instruction is what travels to whoever fits it. Work out which side you will be standing on first — the labels should face the way you walk up to the cabinet, not the wall — because nobody standing in a half-built kitchen at four in the afternoon is going to work it out for you.

And here is the verdict the showrooms will not give you. A shallow drawer with a tray in it beats a narrow pull-out most of the time. You read a pull-out end-on: the front two labels, then you start lifting jars out to see behind them. You read a drawer from directly above, every lid at once, which is the whole reason drawers win in this room. Spice jars stand 3½″ to 5″ tall, which is almost exactly what a 6″ drawer front hides — so the top drawer of a three-drawer base beside the hob takes the entire spice collection, upright, visible, with an angled insert if you want the labels tilted at you.

So the narrow pull-out earns its place in one situation, and it is a good one: where 6 or 9 inches would otherwise be dead. The awkward gap beside a fridge, the stub at the end of a run, the space between a tall cabinet and a wall — the widths where the alternative is a filler panel. There, a BSR06 is storage conjured out of nothing. In the middle of a working run it is a 6″ tax on a wall that needed a drawer base. The way the run adds up is in the sizes reference.

One placement note that has nothing to do with cabinetry: keep oils and spices beside the hob, not above it. Both go stale fast in the heat that rises off a burner, and the cabinet directly over a range is the worst cupboard in the kitchen for anything you eat.

The corner: a door and a handle decide which system fits

The corner argument — blind box against diagonal against easy-reach, what each costs in wall, and the handle-and-filler collision that decides whether any of it opens — belongs to the corner cabinet chapter, which does all of that properly. Read it there. This section adds only the three things that are specific to the mechanism itself.

First: the pull-out picks the box, not the other way round. The blind-corner pull-out exists for BBC42-45 and not for the smaller blind cabinet. The 42-45 is a 42″ box, and the second number is the wall it fills out to once its filler is in — so wanting the mechanism commits you to the larger corner and the extra inches of run that go with it. If the wall cannot give them up, your corner is an easy-reach with trays, a diagonal, or a plain blind box used honestly as deep storage for things you touch twice a year. That is decided before anything is ordered, not after.

Second: the pull-out is handed, and its hand is not yours to pick. It is set by which way the corner door opens — a left-hand unit goes in a right-opening cabinet and vice versa — so the door side has to be settled at the same moment the cabinet is. The other mechanism, the pair of arena trays for BER33 and BER36, is a centre post carrying two round lipped trays — a carousel, so you spin the contents round to the door instead of reaching past them. It is optional: a BER works on its plain shelf without one. Both families buy access by giving up volume, and the corner chapter states the exchange rate for each.

Third, the detail almost nobody draws. A pull-out needs its door out of the way, not merely open. At 110° — what a standard concealed hinge gives you — the leaf and the hinge arm still stand in the first inch of the opening, and a two-stage basket travels straight through that plane, so it catches on the way past. Ask for a 155° or 170° wide-angle hinge on any door a mechanism travels through, then check on the plan that nothing stops that leaf short: the perpendicular run’s own door and pull are standing in the same corner, which is exactly what the filler is buying you. The angles are in the hinges chapter.

• Corner mechanisms are heavy and cantilevered — they find any box that is not level, and report it as a door that swings shut on its own.
• Nothing tall lives on a tray — tier spacing plus a lip is 10 to 12″, so cereal boxes and tall bottles belong elsewhere.
• Load the front tray, not the back one — on a two-stage unit the rear basket travels furthest and is the one that finds every misalignment first.

Trays, pegs and dividers — and the front that has to hide them

Drawer inserts are the one category you can genuinely buy after delivery, with a tape measure, once. But you need three numbers first, and only one of them is the number printed on the cabinet.

Interior width: take the nominal box width, subtract 1½″ for the two side panels, then subtract the drawer system. Ours is a steel-side undermount type where the metal side wall and the runner are one engineered part, and it takes about another inch in total — so a 24″ box gives about 21½″ of usable interior, an 18″ box about 15½″, a 30″ box about 27½″. A wooden box on undermount runners takes nearer 1⅝″, so measure your own before you buy anything cut to width.

Interior length: about 21″ front to back in a 24″ base. This is the number that ruins cutlery trays. Most are made at 16 to 18″ so that one product suits the widest range of cabinets, which leaves 3 to 5″ of orphan slot behind the tray — the strip where corkscrews, batteries and a meat thermometer accumulate. There are three honest responses: buy a tray made to the box depth, run two trays end to end, or decide that the back strip is a deliberate second zone. All three are fine. Discovering it is not.

Front height: the rule this section exists for. A divider only works if the drawer front is tall enough to hide what it divides. A base cabinet is 34½″ tall with a 4½″ toe kick, so the face is 30″, and our three-drawer bases split that face 6″ / 12″ / 12″ — graduated, not equal, and fixed in the way the cabinet is built rather than chosen per order.

Which gives you a sorting rule you can apply in a minute. Behind a 6″ front: cutlery, utensils lying down, spice jars at 3½ to 5″, wraps and foil boxes on their sides, tea towels. Nothing stands up. Behind a 12″ front: plate stacks, bowls, food containers with their lids, pans with the handles turned in, a file of chopping boards on edge. Behind nothing, in a drawer: a half-sheet pan stood upright. It is 18 by 13″, so on its long edge it is 13″ tall and stands proud of a 12″ front. Lay it flat instead — 18 by 13 drops easily into the 21½ by 21″ interior of a 24″ drawer — or give vertical tray storage to a full-height pull-out, which is what that system is for.

Three practical notes on the inserts themselves. A cutlery tray that is not a friction fit across the full interior width will creep forward every time the drawer closes and eventually jam under the front; either it fills the width or it gets fixed. A peg system — a base board with movable dowels for plate stacks — has to be cut to your interior, which is the one time “cut to fit” is the right product, and it is worth knowing that pegs stop things sliding and do nothing about a stack toppling, so soft close matters more than the pegs do. And fixed dividers for boards, lids and muffin tins hold better than removable wire racks, at the cost of being permanent: choose that layout as if you will live with it for five years, because you will.

Last one, and it decides how you fix anything inside a drawer: the bottom of a steel-side drawer is a panel dropped into the sides, not a structural floor glued into a groove. Screwing an organiser down through it is fastening to a panel. Friction fits and full-width inserts are the better answer in that system every time.

Three organisers that take more than they give back

Not every accessory earns its place, and the bad ones fail in a pattern: they improve the part of the cabinet that was already working.

• The door-mounted rack that eats the shelfA rack hung on the inside of a door is 3 to 4″ deep, and the maker will ask for about 4½″ of clearance behind the door — so every shelf behind it gets cut back by four and a half inches, or the door will not shut. On a wall cabinet, which is 12″ deep and gives about 10½″ of clear shelf, that turns a shelf which holds a dinner plate into one that holds a side plate. You traded the storage you use daily for a rack of sachets.Where it does workThe sink base, where there is no shelf to lose and spray bottles have nowhere else to go. We do not sell a door rack in either case — it is a fitting you buy elsewhere, and the measurement that matters is that the contents clear the trap with the door shut.
• The tiered riser in a cabinet that should have been drawersA stepped shelf makes three rows of tins visible at the front of the cabinet and leaves the back eight inches exactly as they were. It improves the part of the box you could already see.The testAsk whether it moves the back of the cabinet or only decorates the front. If the box is already built and you are stuck with doors, a single full-depth pull-out shelf is the honest retrofit, because the whole floor comes out to you. If the box is still a drawing, buy a drawer base instead and skip the accessory entirely.
• Anything that has to be removed to clean under itWire baskets screwed to a cabinet floor, sink mats with a lip that traps water, liners cut round a trap. The rule is brutally reliable: if it does not lift out in one motion with one hand, it will not be lifted out, and what is underneath it will not be cleaned for a decade.Buy insteadAnything that lifts clear, and in a sink base anything that lifts clear while you are annoyed and the floor is wet.

One smaller trap worth naming, because it catches people who did everything else right: shelves do not move continuously. Our boxes use the 32 mm system, so the pin holes step in a fixed pitch of about 1¼″, and a shelf lands on a hole or it does not land. An organiser that needs a 9″ clear gap above it will get 8¾″ or 10″, never 9″. Measure the tall thing first, then buy for the gap the pitch will actually give you.

Decide the accessories with the cabinet list, not after delivery

Everything on this page collapses into one piece of scheduling. Accessories in a frameless kitchen are not a second shopping trip. Every one of them is either a cabinet or a part scoped to one cabinet family, decided at the moment the cabinet list is written — with a single exception, the drawer insert, which is the only thing on this page you can genuinely buy afterwards.

So the last pass over a cabinet list, before it is ordered, is an accessory pass — about twenty minutes, working down the run cabinet by cabinet:

• One bin, one named cabinet — written on the list, not assumed.
• Bin against the dishwasher swing — 24″ of open door, at least one cabinet between them.
• Sink base wide enough for the under-sink bin — if that is the plan, the box is 33″ or wider.
• Every corner has a system and a filler — including the 3″ that buys the door its swing. Corner comparison here.
• Handle type checked at every corner — a bar pull is 1¼ to 1½″ of projection nobody drew.
• Drawer count settled before the fronts are — 6/12/12 is how a three-drawer base is built, not a preference.
• Interior width and depth of each drawer written down — so the inserts are bought once, after delivery, with real numbers.
• Nothing screwed to a floor over plumbing — everything in a sink base lifts out in one hand.

One honest limit to end on. All of this is planning you can do with a tape, a cabinet list and an hour, and it catches the sequencing failures — the wrong box, the missing filler, the bin beside the dishwasher — which are the ones that cannot be fixed afterwards. What it cannot tell you is whether a particular mechanism is any good: how many cycles the runner is rated for, whether the tray is full extension, what it will carry loaded. Those come off the maker’s own specification sheet, and they are worth reading before you commit to a mechanism you will pull twenty times a day for the next twenty years.