Drawer Loft – Sliding Second Level for Deep Drawers (Gridfinity-Compatible), Slide Instead of Lift

A modular kit that adds a second, sliding level inside a deep drawer that already has a Gridfinity baseplate (Gridfinity-compatible; not an official Gridfinity product). Low lanes (1 grid unit wide) drop into the baseplate. A table - a 4 x 4 Gridfinity deck carried by two arched leg panels - stands in two lanes and slides over the lower bins. Upper bins sit in the deck's pockets and ride along; the lower bins appear in the open window beside the table. You slide the table aside instead of lifting bins off.

Validation status (please read): digitally validated only: CAD geometry and interface checks, slicer checks without supports, a layout planner and derived (calculated) click, binding and tipping figures. It has not been physically printed or tested. Print the fit coupon first. All pictures are renders or drawings of the exported CAD with generic proxy bins and items - none is a photograph.

Features

• Slide, don't lift: push the table sideways by its handle and the lower bins beside it are open (designed so; not yet tried on a printed part).

• Drops into your existing Gridfinity baseplate: the lanes use standard Gridfinity feet; no drawer modification, no screws, no cutting, no rails. You count your grid and check the inside height.

• One guided leg, one floating leg: the guide leg's 2 mm keel runs in a narrow slot (0.2 mm per side); the other leg stands on a wide floor and floats ±1.7 mm, so small baseplate errors do not make it bind.

• Soft index ticks: the guide leg's two teeth drop about 0.6 mm into a tick at every grid unit, so the table rests with its pockets over a grid column (a slow-push hold, not a lock). End pieces stop the table at the end of its run.

• Only the guide leg has a handle, so a push is on the guide line and the table does not rack (derived).

• Edge lanes carry a low or tall tray outside the table's path.

Will it fit my drawer?

All heights are measured from the bin seat (the underside of a bin standing in your baseplate; on magnet or weighted baseplates add their floor thickness). Legs come in height classes L2-L8 for lower bins of L units (lipped), with upper bins of U units:

All values in mm. General formula: 7L + max(7U + 16.2, 54.95) + 3 mm. Examples: L3 + U3 about 79 mm, L4 + U4 about 86 mm, L6 + U4 about 100 mm, L6 + U6 about 103 mm, L8 + U6 about 117 mm above the bin seat. Classes stop at L8 because a loaded table's centre of mass rises with L. With U6 or taller upper bins the handle sits between the bins (hook it from the lane side).

Layouts and bin places

Bin places = 1 x 1 grid cells, not volume; every lower bin is reachable by sliding.

Your drawer must be at least the grid footprint inside, plus your baseplate's margin. Every bay keeps a free window at least 4 units wide; one table needs at least 8 units along its lanes; one bay adds bin places from 12 units along the lanes, two or more bays (sharing middle lanes) from 8. Lower bins wider than one unit along the lanes: keep each inside a 4-unit block counted from a run end. The included planner (python model.py --plan COLS ROWS, plain Python, no CAD needed) prints the layout, the lane pieces per run and the counts for your drawer.

Which files?

• Ready-to-print PrusaSlicer 2.9 projects (every plate sliced and checked): drawer_loft_bay12_L6_complete (one complete 12 x 6 bay with two L6 tables, 6 plates, about 630 g); drawer_loft_table_L2..L8_complete (one table of your height class: deck + both legs, 2 plates); drawer_loft_bay12_lanes_complete (the two lane runs of a 12-unit bay); drawer_loft_00_fit_coupon (print first). Single-plate projects 01-04 are included for printers without multi-bed support.

• STL files: edge lanes LOW (18.5 mm tray) and TALL (56 mm tray) and MIDDLE lanes, each 2, 3 and 4 units long; end pieces (low a/b, tall a/b - mirror pairs - and middle); the deck; guide + free legs for L2-L8; the fit coupon.

• model.py: the CadQuery source (exports legs for any class with --export-legs L) and the layout planner.

Print settings

• PETG for the deck and legs (warm rooms, creep under a loaded deck); PETG or PLA for lanes and end pieces.

• 0.4 mm nozzle, 0.20 mm layers (0.12 mm for the lanes gives smoother tick flanks), no supports.

• Lanes and end pieces upright on their Gridfinity feet; deck flat, skin down (pockets up), bottom skin printed solid (12 bottom layers - already set in the projects); legs flat on their face, keel side on the bed (use elephant-foot compensation).

• The deck needs a bed of at least 201 x 168 mm and has a large PETG first layer (about 33,000 mm²): clean bed, glue stick or a textured sheet.

• Deck 9 h 35 min / 152 g; guide leg L6 1 h 40 min / 25 g; free leg L6 1 h 20 min / 20 g; lane LOW 4 units 2 h 55 min / 39 g; lane TALL 4 units 5 h 01 min / 61 g (PrusaSlicer 2.9.6, generic 0.4 mm profile, PETG; estimates, not measured prints).

Assembly

1. Print the fit coupon first: the guide sample's keel should slide freely in either slot of the lane stub with slight side play (about 0.2 mm per side), no binding, and drop into the tick; the free sample should stand on the wide floor; the leg samples should press into the ribbed slot block by hand, and only one way round.

2. Lay the lane runs across the drawer (N bays = N + 1 runs, 5 rows apart; the planner lists the pieces). Edge lanes with the tray on the outside; middle lanes between two bays. Put an end piece at both ends of every run, closed end outward.

3. Fill the rows between the lanes with lower bins of your legs' height class.

4. Build each table on the bench: hold the deck pockets-up and push each leg up through its rim slot from below, handle first, until the deck sits on the leg's end shoulders. The groove on each leg faces the middle of the deck; a ridge stops a leg that is the wrong way round. Crush ribs hold the legs; no glue.

5. Lower the table into its lanes: the guide leg (with the handle) into the front lane - its keel finds the narrow slot - and the free leg onto the back lane. It is aligned when the teeth click into the ticks; if it does not click, nudge it until the handle side drops about 2 mm.

6. Put upper bins into the deck pockets.

Use

Push or pull the table by its handle or on the handle half of the deck - not at the free-leg edge, where a push can make it stick. It clicks softly at every grid position and stops at the end pieces. Keep lower-level contents below the rim of their bins (the deck passes 5 mm above the lower bins' lips). To lift a table out, take the heavier upper bins out first, then lift by the handle and the deck rim on the other side.

Limitations

• Not physically printed or tested (see Validation status).

• Needs a Gridfinity baseplate in the drawer (not included; designed for standard Gridfinity baseplates).

• The table holds its position by gravity ticks and friction only. In the front-to-back layout a brisk pull or a slam can slide a table along its lanes and upper bins can hop out of their pockets; for drawers that get slammed use the cross layout (worked out on paper for classes up to L6; with L7-L8 legs a hard slam may still lift a table - derived estimate, not tested).

• Designed for about 1.5 kg per table - roughly 90 g per upper bin on average; keep heavy items in the lower level (derived from the CAD: sag about 1.2 mm at 2 kg; no load test).

• A second level costs floor: each lane uses one grid row. In a narrower drawer you get a second level to slide, not more places (see the layout table).

• Lower-level items that stick up above their bin's rim will catch the deck. Heights are for lipped Gridfinity bins; with lipless lower bins use the same legs (9.4 mm clearance).

• Assumes standard Gridfinity dimensions (42 mm grid, 7 mm height unit, 4.4 mm stacking lip) and a flat baseplate.

Pictures

All pictures are renders or drawings of the exported CAD, not photographs: one table standing over the lower bins (cover), the loft in a drawer with two tables, the three-step slide, sections through the guided and floating legs, heights and sizes, drawer layouts, and the kit flat-lay. Bins, baseplate, drawer and items are generic proxies.