Falls from height kill more construction workers than anything else, and most of them are not from scaffolds. They are from ladders and steps, at heights nobody thought were dangerous.

The short answer

Three access items to know: step ladder, ladder, and mobile elevated work platform or tower. Tower checks: components assembled, access steps, kick boards, handrails, locking wheels, platform boarded, clean, safety tags.

There is no minimum height

Working at height duties and the ladder figures
Avoid, prevent, reduce — and no minimum height anywhere in it.
Key figures for working at height
The examinable numbers from this article, in one place.

The thing most people get wrong. Work at height means work where a person could fall a distance liable to cause injury — and that includes falling below ground level, into an excavation or through an open hatch.

There is no two-metre rule. A fall from a hop-up onto a tiled floor breaks wrists and skulls, and a large share of serious falls are from under two metres. The dangerous heights are the ones nobody respects.

What the regulations actually ask, in order

The Work at Height Regulations set a sequence, and it explains why "can this be done from the ground?" is the first question:

Ladders are not banned, which is a persistent myth. They are permitted for low-risk, short-duration work — the usual figure quoted is around thirty minutes in one position — where a risk assessment shows something better is not justified. Changing a light fitting, yes. A morning's work on a gutter, no.

The plumber's actual risk

Not the scaffold. It is the loft hatch, the stepladder on an uneven floor, the flat roof reached for a flue, and the leaning ladder up to a gutter with nobody footing it.

Three things cause most of it: overreaching rather than moving the ladder, the base slipping because it was not footed or tied, and the ladder not being long enough, so somebody stands on the top few rungs.

The rules that prevent all three: one out to four up; extend about a metre above the landing point; three points of contact; and keep your belt buckle between the stiles. The moment your buckle leaves the stiles, you are pushing the ladder sideways.

Fragile surfaces

The one that kills plumbers specifically. Roof lights, cement sheet roofs and old corrugated panels look solid and will not take a person's weight. Falls through fragile roofs are a recurring cause of death in this industry, and they happen to people who were only crossing to get to something else.

Assume any roof light and any cement sheet is fragile until somebody proves otherwise.

Tower tickets

A mobile scaffold tower
A tower is a workplace, not access. Erecting one needs the training the ticket proves.

You need training to assemble a mobile tower — PASMA is the recognised card — and the qualification is a short course, typically a day or two. It is one of the cheapest tickets to add and one of the most commonly asked for.

A tower can be assembled perfectly and still be out of use because it has not been inspected. Look for the safety tag before you climb, every time, including on one you built yourself yesterday.

What comes next

At Level 2 this becomes the regulations by name, with the inspection intervals and the records. And the tickets — PASMA, and often a harness course — become part of what makes you employable.

🔢 The numbers worth memorising

75
degrees — the correct ladder angle
1 in 4
one metre out for every four metres up
1
metre a ladder must extend above the landing point
3
points of contact when climbing
1st
falls from height are the biggest killer in construction

⚠️ Where people go wrong

  • Thinking working at height means high up. Any height where a fall could injure you counts.
  • Working from a ladder all day. A ladder is for access and short jobs, not sustained work.
  • Getting the ladder rule backwards. It is one out for every four up, not four out for one up.
  • Overreaching instead of moving the ladder. Your belt buckle should stay between the stiles.
  • Forgetting the safety tag. An out-of-date tag means the ladder has not been inspected.

📝 8-Question Self-Test

Straight from the Level 1 course question bank. Click an option to see whether you got it right — the explanation appears instantly, and there is nothing to submit.

Your score: 0 / 8
Question 1 of 8
Which of these is a mobile elevated work platform?
Question 2 of 8
Which of these is a situation where a plumber needs to work at height?
Question 3 of 8
Which of these counts as working at height?
Question 4 of 8
Before setting up any access equipment, what is the first question to ask?
Question 5 of 8
Which access equipment gives you a guarded working platform?
Question 6 of 8
Which of these is a named situation where a plumber works at height?
Question 7 of 8
Getting into a loft to reach a tank counts as which kind of work?
Question 8 of 8
Which item of access equipment has a working platform with guardrails you stand inside?

Going deeper: the same ground at Level 2

Level 1 gives you the shape of this. The Level 2 guides below take it considerably further — the regulations, the calculations and the detail you will need next. Free to read, same as these.