Operating Table Weight Capacity: Safe Working Load vs Lifting Capacity

Safe working load: the figure that matters clinically

The safe working load is the patient weight the table is designed to carry in normal use, with the table top in the positions the manufacturer allows. It is the figure to compare when you ask about the maximum patient weight for an operating table. The Lojer Smarter Practico states a safe working load of 280 kg in all directions including slide, while the Lojer Grand Promerix lists 275 kg.

Notice the wording: 280 kg in all directions including slide means the rating holds when the top is shifted along its length, which is exactly where some tables lose capacity.

Maximum lifting capacity is a different number

Maximum lifting capacity describes what the lifting mechanism can raise, and it is normally higher than the safe working load because it includes a safety margin. The Smarter Practico lists 460 kg and the Grand Promerix 490 kg. These numbers should not be used to decide how heavy a patient the table may carry in surgery.

Definitions can vary between manufacturers and standards, so ask each supplier to state in writing how each figure is defined and under which test conditions. The relevant product safety standard for operating tables, IEC 60601-2-46, is a useful reference when you write questions for tenders.

Position-dependent limits and accessories

A table may carry its full rating when flat but less with the back section raised, with the top tilted laterally, or with the top slid fully toward one end. Ask for a load diagram showing the permitted weight at extreme positions, and confirm whether an orthopaedic attachment, headrest or leg support reduces it.

Accessories have their own ratings, and the lowest one in the chain applies. A heavy-duty table with a lightly rated leg holder is only as strong as the leg holder.

• Rated load flat, tilted, in Trendelenburg and with sections raised
• Load at full longitudinal shift
• Accessory ratings, including arm supports and leg holders
• Mattress and pad effect on load transfer and height

How to specify load requirements in a tender

Decide the heaviest patient you expect, then add a margin appropriate to your facility. If your hospital performs bariatric surgery, state it explicitly and require a safe working load valid across the positions you will use. Do not copy a single manufacturer's figure into the specification unless you want to exclude others.

Specify width as well as weight. A heavier patient also needs a wider top, secure side supports and straps, space around the table and a transfer method suited to the load. For more on this, see our guide to the bariatric operating table.

Checks beyond the datasheet

Ask how the table behaves under load: does the height lift smoothly, do the tilts hold position, and does the floor lock or brake keep the table stationary? Slim bases improve C-arm access, but the stability of the base under a heavy patient should be confirmed with the manufacturer. Include load checks in the installation and commissioning acceptance test.

Finally, remember the room around the table. Transport trolleys, transfer devices and the route from the ward must also suit the patient's weight, so involve nursing and porter teams when you set the load requirement.

To discuss which model fits your caseload, request a quotation from Beckfinity's specialists through our contact page.