Cables and desk layout

Which Under-Desk Cable Organizers Fit Without Taking Your Legroom?

Published · By Ergocrew · Specs and guidance as of that date, from the pages under Sources

Summary

Measure the space your legs need before you buy anything for under the desk. OSHA's minimum clearance is 20 inches wide, 17 inches deep at knee level and 24 inches deep at the feet, and anything mounted inside that space competes with your knees. What's left, a strip along the back of the underside and the floor behind your feet, is where a tray, clips or a box can go.

The space OSHA sets aside for legs

OSHA's work-space page gives minimum dimensions that accommodate "the majority of users (5th percentile female to 95th percentile male)" sitting with their thighs roughly parallel to the floor.

MeasurementOSHA minimum
Width20 inches (52 cm)
Depth at knee level17 inches (44 cm)
Depth at foot level24 inches (60 cm)
Height at the foot4 inches (10 cm)

To find where that leaves room, run a tape measure back along the underside from the front edge and mark 17 inches. On a desk 30 inches deep, that leaves a 13-inch strip at the back for a tray. On a 24-inch-deep desk the strip is 7 inches, which fits a slim power strip but not much more. On the floor, the first 24 inches back from the front edge are for your feet.

A tray, for the power strip and bricks

A tray holds the heavier parts off the floor. When you compare trays, look for three things on the spec page: a weight limit, how it fixes to the desk, and whether it can be adjusted. UPLIFT's FlexMount Cable Manager is a useful example because its page gives all three. It says the brackets and basket "support up to 10 lbs of wires & adapters," that it installs "with just two included screws and pre-drilled holes in most UPLIFT desktops," and that "Four vertical settings allow the basket to be raised or lowered on front or back to fit various wire volumes." The page doesn't list the tray's dimensions, so the 13-inch or 7-inch strip you measured is the check.

A screwed-on tray moves with the desktop. On a sit-stand desk that means the equipment in it goes up and down with the top, which our guide to standing desk cables covers in detail.

Clips, for single light cords

Adhesive clips hold one cable along the underside. Vari's instruction sheet for its electric standing desk says the included clips can "secure the control panel cord to the underside of the desktop" to "keep it out of the way." The job in that example is one thin cord. A power brick hanging off a clip is a different load, and a tray is the part designed for it.

A box, for power on the floor

A cable box holds a power strip on the floor with nothing fixed to the desk. It needs to sit behind that 24-inch foot zone or off to one side where the chair doesn't roll. Our comparison of cable trays and cable boxes covers sizing the box to your power strip and what box makers say about heat.

OSHA's desk page lists a computer tower among the things to keep out of that space: "Avoid storing items, such as a CPU, under desks." One of its figures carries the caption "Clutter under work top limits space for legs and chair positioning."

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Related guides

Sources

  1. OSHA Computer Workstations eTool, Work Space
  2. OSHA Computer Workstations eTool, Desks
  3. UPLIFT Desk, FlexMount Cable Manager
  4. Vari, Electric Standing Desk instruction sheet (2023)

We have not tested these products. Specs and guidance are as published on these pages on the date above and can change; the manufacturer's page for your model has the current details.

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