Height-Adjustable Desk Sourcing: Frame, Motor and Control

Two-leg or four-leg frames

Frame choice starts with the seat count and the working height range. A two-leg frame suits single-user desks up to roughly one and a half metres wide and keeps the leg footprint narrow, which makes it easier to fit into a bench system later. Four-leg frames spread the load across four lifting columns, so they hold long or deep tops with less flex and accept heavier loads, at the cost of weight, price and more motors to service.

Stability is a purchasing question, not a marketing claim. Ask for the rated side-to-side and front-to-back deflection figures and for the height at which the frame was tested, because desks are least stable at their highest setting, which is exactly where users stand.

Motors, load and duty cycle

Single-motor frames drive both legs through a shaft or a slave leg, while dual-motor frames give each leg its own motor synchronised by the control box. Dual-motor units generally lift more evenly, run quieter and cope with off-centre loads better, which matters for corner or shared tops.

Collect four numbers before comparing prices:

• Rated load, counting the top and any accessories

• Travel speed measured under load, not idle speed

• Sound level measured at the seated user position

• Duty cycle, or the number of full cycles allowed per hour

Anti-collision sensitivity is worth specifying. The desk should stop and reverse on contact, and the sensitivity threshold should be adjustable rather than fixed.

Controls, cable management and packing

Control panels range from a simple up-down switch to programmable panels with three or four memory presets, and a lockout function is a common requirement in education and shared-desk projects. Confirm the supply voltage at destination, the plug type and whether a low-voltage or battery option is required.

Cable management should be quoted as a kit: a tray or basket, a vertical spine or loop, and a way of routing power from the floor to the desk. Under-desk clearance shrinks quickly once a tray is fitted, so check the seated knee space with the tray installed.

Finally, weigh the packaging. Height-adjustable desks ship in long cartons, and carton weight rather than desk weight drives freight. Ask for carton dimensions, gross weight and cartons per desk, and confirm whether tops and frames ship separately.

Key Takeaways

• Choose frame geometry by top size and load, then confirm deflection figures in writing.

• Dual-motor systems usually handle off-centre loads and noise better than single-motor units.

• Specify anti-collision behaviour and an adjustable sensitivity threshold.

• Quote cable management as a kit and check knee space with the tray fitted.

• Compare freight on gross carton weight and carton count, not desk weight alone.