ISO P025 Do not use this incomplete scaffold Sign

The Sign for Scaffolds Not Yet Fit to Use

P025 prohibits using a scaffold that is incomplete. The pictogram shows a figure climbing scaffold framing under the red prohibition band. It applies during the vulnerable windows in a scaffold's life: while it is being erected, while it is being altered or partially dismantled, and any time an inspection has found it deficient — missing guardrails, unsecured boards, absent ties, or unfinished access.

The risk profile explains the dedicated sign. A part-built scaffold looks nearly identical to a finished one from the ground, yet the missing components are exactly the ones that arrest a fall or keep the structure stable. Trades under schedule pressure will climb whatever is standing unless something tells them the structure has not been handed over.

How It Fits the Tagging System

On most sites, P025 operates inside a scaffold tag regime. Tag holders fixed at each access point display a green tag when a competent person has inspected the scaffold and released it for use; a red tag, or an empty holder, means do not use — and the P025 symbol is the pictographic form of that red state. Some systems add a yellow or amber tier for scaffolds usable only under stated restrictions.

The sign and the inspection record answer different questions. P025 tells a worker at the ladder right now that the structure is off-limits; the tag and register tell a supervisor who inspected it, when, and what was found. Erection crews hang P025 the moment the first standards go up and remove it only when the handover certificate is issued, so the default state of any scaffold is prohibited until proven complete.

The Regulatory Backdrop

US construction rules make inspection the gatekeeper: OSHA 29 CFR 1926.451 requires a competent person to inspect scaffolds before each work shift and after any event that could affect structural integrity, and workers may not use scaffold that has not passed. In Great Britain, the Work at Height Regulations require scaffold inspections at regular intervals — every seven days is the standard cycle — plus after alteration or weather that could weaken it, with results recorded.

Neither regime names the P025 pictogram, but both create the condition it communicates: a scaffold that is unfinished or uninspected is legally unusable, and the employer must convey that status to everyone on site. Posting P025 at each access ladder and stair, in the language-independent ISO format, is the accepted way to do that on multilingual construction sites where written notices fail.

What do green, yellow, and red scaffold tags mean?

Green means the scaffold has been inspected by a competent person and released for use. Yellow or amber, where used, means restricted use under stated conditions, such as harness required because a section lacks guardrails. Red — or a missing tag — means the scaffold must not be used at all. P025 signage corresponds to the red state and stays up until handover.

Who is allowed to declare a scaffold complete?

A competent person: someone with the training and experience to evaluate scaffold integrity, named in the site's procedures. Under OSHA 1926.451 that person must inspect before each shift and after any incident affecting the structure; UK rules require inspection at handover, then at intervals of no more than seven days. Erectors themselves cannot self-certify outside that framework on most sites.

Where should the P025 sign be attached?

At every point a person could get onto the scaffold — each ladder, stair tower, and gate — at eye level on the access route, not buried mid-elevation. On partially complete scaffolds where some bays are released and others are not, physical barriers should close off the prohibited sections and the sign should mark those barriers, because a sign alone will not stop someone traversing internally.

Does an incomplete scaffold also need physical access prevention?

Yes. Signage flags the status, but recognized practice is to remove or board over the bottom ladder, fit a locked gate, or barrier the access points so casual use is physically difficult. Regulators treat an unguarded, climbable, incomplete scaffold as an open hazard even when signed, particularly on sites where the public or children could reach it out of hours.