In brief
- A certificate or a reference letter shows attendance or past work, not the ability to build a stable platform on your site.
- Verify scaffold erection competency by checking documents, then watching a supervised trial bay go up before you sign anything.
- Unverified crews can create risks that are easier to close before mobilisation than after the first platform fails.
Contents
A contractor's certificate or reference letter does not prove the crew can erect a safe working platform. To verify scaffold erection competency, ask for the erection drawing, the training record and the inspection log, then watch the gang build one supervised bay before you award the work. Claims without evidence leave unstable working platforms for you to discover later.
Why does paperwork alone fail as proof?
A document shows attendance or past employment, not the ability to read a drawing and build what it shows. The gap opens here: a labourer who learned on a different system, a foreman who cannot check a ledger spacing, or a supervisor who has never inspected a tie will all produce something that looks like scaffolding but may not carry the loads the drawing assumes.
General practice in temporary works is to check the erection drawing against the actual structure, confirm the standards, ledgers and transoms sit where the drawing puts them, and inspect ties and bracing before any load goes on. Confirm the exact spacings, tie intervals and load limits against the project's specification or the temporary works engineer, because they depend on the scaffold system and the loads it carries.
A training certificate from another country or another scaffold type proves little on its own. What matters is whether this crew, on this building, can follow this drawing. Walk a recent site the contractor names, look at what stands there, and ask who inspected it and when.
How does the gap turn into an unstable platform?
An unverified crew can build a platform that looks right and still fails the checks that matter. Missing ties, over-long ledger spans, missing base plates or a platform without toe boards and guard rails all pass a casual glance. Under load, that shows up as sway, as a leg sinking into soft ground, or as a board that gives way under a worker carrying materials.
Coastal or salt exposure can accelerate corrosion of fittings, and timber decks can dry out and split when the scaffold stands in heat for a long time. Ask the supplier or the temporary works engineer for the maintenance and inspection interval that fits the system, and confirm the site exposure conditions with them before you set the interval. Confirm the site's exposure conditions with the supplier or the temporary works engineer, and take their maintenance and inspection interval for the system.
The risk lands on whoever works at height, and on the client who owns the structure the scaffold is tied to. Ties drilled into a wall can pull out or crack the finish, and a collapse can damage the building as well as injure the crew.
What should a client ask for and watch?
Ask for three things in writing before mobilisation: the erection drawing signed by a competent temporary works engineer, the training and experience record for the foreman and the operatives, and a named person responsible for inspection.
Then arrange a trial bay. Have the crew erect one section in front of your supervisor or engineer. Watch how they read the drawing, whether they set base plates on firm ground, how they fix ties, and whether they check their own work before calling it finished. A crew that argues with the drawing or skips the tie pattern is telling you something.
Check the contract for what happens if the scaffold fails inspection. If the terms are unclear, ask a lawyer to read them before you sign, and never rely on a verbal promise that the crew is competent.
What to do next
Before you award the scaffold package, write a one page verification list: drawing, training records, named inspector, trial bay result and inspection interval. Send it to two shortlisted contractors and ask each to return it signed with evidence attached. Award only to the contractor who returns it complete and whose trial bay passes your supervisor's check.
Frequently asked questions
Does a scaffold training certificate prove a crew is competent?
No. A certificate shows attendance on a course, not that the crew can read your erection drawing and build to it. Pair the certificate with a supervised trial bay and a look at a recent site the contractor names.
Who should inspect a scaffold before it is used?
A named competent person, agreed in writing before mobilisation. General practice is to inspect before first use, after alteration or bad weather, and at set intervals. Confirm the interval with the temporary works engineer or supplier for the system used.
What does the municipal engineer's office check on scaffolding?
That depends on the permit conditions for the building, so ask the office directly and keep the answer in the tender file. Do not assume a national rule applies; get the requirement in writing for your plot.
Local reporting: this article is written for building work in Berbera and Somaliland. Ground conditions, prices and rules differ between places; confirm the details for your own site.