How to calculate scaffold meterage, with worked examples

Meterage is the measure a scaffolding job is priced on, and it is the first thing two firms disagree about when a quote is challenged. The arithmetic itself is straightforward. What causes the arguments is what gets counted — and whether the person pricing the job and the person paying for it are counting the same things.

What meterage actually measures

In most UK practice, meterage is the area of the scaffold face: length along the elevation multiplied by height. A run 20 metres long and 8 metres high is 160 square metres of scaffold, and that figure is what the rate is applied to.

Height here means the height of the scaffold, not the height of the building. A scaffold that stops at the eaves of a two-storey house is measured to where the scaffold stops. If it carries on above the eaves to give a handrail at roof level, that extra height is scaffold and it is measured.

Some firms price on linear metres per lift instead — the length of the run multiplied by the number of lifts rather than by the height. The two approaches produce different numbers from the same scaffold, which is exactly why a quote should say which one it used.

Worked example: a straight run

A single elevation, 20 metres long, scaffolded to 8 metres high. The face area is 20 × 8 = 160 square metres. At a rate of, say, £14 per square metre for erect, dismantle and a fixed hire period, that is £2,240 before anything else is added.

Nothing about that is controversial. It becomes controversial at the corner.

Worked example: a return

Same 20-metre elevation, but the scaffold turns the corner and runs 4 metres down the gable. That return is 4 × 8 = 32 square metres, giving 192 square metres in total.

The return is where disputes start, because a 4-metre return is not 4 metres of work. It needs its own standards, its own ledgers and transoms, and the corner itself takes longer to build than 4 metres of straight run. Some firms measure returns at face value and carry the extra in their rate. Some measure to a minimum. Both are defensible; only one of them is in your quote, and the client cannot tell which unless it says.

Where the money actually goes missing

• –Returns and gable ends measured inconsistently between quotes, so the rate has to absorb a variable that should have been measured.
• –Boarded lifts below the working platform — a scaffold boarded at every lift is not the same job as one boarded at the top, and face area does not distinguish them.
• –Loading bays, staircases and hop-ups priced as part of the face rather than as the separate items they are.
• –Ground conditions that force stepping or additional sole boards, which cost labour and appear nowhere in a length-times-height figure.
• –Adaptations during the hire, which are almost always the largest single source of unrecovered money on a job.

None of these are measurement errors. They are things the measurement does not capture, which is a different problem and a more expensive one.

Getting it off the model instead

The reason meterage gets estimated rather than measured is that measuring it properly means knowing the scaffold before you have built it — the bay lengths, the lift heights, where the returns fall, how many lifts are boarded out. On a drawing or a site visit that is guesswork with experience behind it.

If the structure has been modelled, it is not guesswork. The face area, the board count and the material list all come out of the same model, and the quote is priced off what the yard will actually load rather than off an estimate that was close enough at the time. That is the difference between a rate that has to carry risk and a rate that does not.