A quotation may say “load capacity”, an instruction manual may use SWL, and a trolley specification may give a limit for each shelf. Those entries do not automatically describe the same thing. Before comparing numbers, establish what is being loaded, in which configuration and under which conditions.
This guide is for reading procurement documents. It does not set safety limits or decide whether equipment is suitable for an individual patient.
Start with the model, not the biggest number
Identify the exact model and variant in the quotation. Then request the manufacturer’s applicable instructions for use and the documentation for the accessories included in the offer. Keep the document number, revision and relevant page beside each specification.
A brochure for a product family can help you shortlist equipment. It may not be enough to resolve a missing condition for a particular configuration. When a translated specification uses a broad word such as “capacity”, retain the original term as well.
Separate three questions
These are fields to investigate, not interchangeable labels or a universal classification. “Maximum load” alone is not a complete answer.
- Safe working load, or SWL: to which product, assembly or component does this rating apply, and what does the manufacturer include?
- Maximum patient or user weight: is there a separate limit specifically for the person using the equipment?
- Shelf or worktop load: does the figure apply to one named surface, a particular section or the complete unit?
What manufacturer documents demonstrate
Amico’s Overbed Table manual assigns SWL entries to individual surfaces and accessories. The abbreviation therefore does not, by itself, tell you that a figure describes the whole product. Amico manual, page 2
Bristol Maid’s specification for its Room Divider Dressing Trolley explicitly gives a load per shelf. Copying that figure into a comparison column labelled “total trolley capacity” would change its meaning. Bristol Maid specification
Arjo’s Prioma Overbed Table instructions qualify SWL with an evenly distributed-load condition and prohibit leaning or sitting on the table. A surface rating is not permission to use it as a seat or body support. Arjo Prioma instructions, pages 1 and 10
Four shortcuts to avoid
Do not convert a general load figure into a patient-weight limit. If the latter is missing, mark it as unconfirmed and request the relevant manufacturer statement.
Do not add shelf or accessory ratings to invent a total capacity. A set of local limits is not, on its own, a statement about simultaneous loading of the entire unit.
Do not assume a distributed-load condition also permits a concentrated load at an edge or on one small area. Record the stated distribution and ask about the intended arrangement rather than designing your own test.
Do not treat the highest number in a document as the controlling specification. Different entries may refer to different surfaces, configurations or operating conditions. An apparent discrepancy needs clarification, not selection of the more convenient value.
Build a comparison that keeps the conditions
For each candidate, record:
Use “not stated” when a document is silent. Do not change it to “unlimited”, “not applicable” or an estimated value. Keep unlike specifications in separate rows until the supplier explains whether they are genuinely comparable.
- Exact model, variant and quoted accessories.
- Manufacturer’s original rating term, value and unit.
- The object or surface covered by that rating.
- What is included in the stated load.
- Any stated distribution, position, adjustment or movement conditions.
- Document number, revision, page and unresolved questions.
A useful question for the supplier
“Please provide the manufacturer’s applicable instructions for this exact model and configuration. Identify the patient/user limit, if applicable, the scope of each load rating, and any separate limits or conditions for the worktop, shelves and accessories. Please clarify any differences between the quotation and the manual, with page references.”
Request information about the equipment and intended configuration; personal patient details are not needed for this documentation comparison.
The procurement takeaway
A well-supported comparison is not a contest for the largest kilogram figure. It is a comparison of the same type of rating, with its scope and conditions preserved. Resolve unclear entries before relying on them in a purchase specification. Operational use and individual suitability still require the applicable manufacturer instructions and the responsible professionals’ assessment.
Sources and limitations
Examples from Amico and Arjo Prioma instructions and a Bristol Maid specification; conditions apply only to the corresponding product.
