Working at Height: Regulations, Ladder Rules, and Fall Prevention

Falls from height are the single biggest cause of workplace fatalities in Great Britain, accounting for around a quarter of all fatal injuries to workers each year. They are also among the most preventable. A systematic approach to working at height — starting with avoiding it altogether where possible — would eliminate the vast majority of these deaths and serious injuries.

The Work at Height Regulations 2005

The Work at Height Regulations 2005 (as amended in 2007) apply to all work at height where there is a risk of a fall liable to cause personal injury. They implement the EU Temporary Work at Height Directive and apply across virtually every sector.

Importantly, the Regulations define working at height as any work where a person could fall a distance liable to cause personal injury — including work at ground level where there is a risk of falling into an opening or hazard below. There is no minimum height threshold. A fall of one metre can cause serious injury; falls of two metres can be fatal.

The Regulations apply to employers, the self-employed, and any person who controls the work. They apply whether the work is planned or unplanned, indoors or outdoors, temporary or permanent.

The Hierarchy of Control

The Regulations establish a clear hierarchy of measures that must be followed in order:

Step 1: Avoid work at height where it is reasonably practicable to do so. Can the task be done from the ground? Can equipment be pre-assembled at ground level before being lifted into position? Can remote inspection techniques (cameras, drones) replace physical access? If the task can safely be done without working at height, that is always the right answer.

Step 2: Prevent falls using collective protective measures. If work at height cannot be avoided, the first priority is to prevent falls through measures that protect everyone in the area without requiring individual action — guardrails, scaffolding, safety nets, and working platforms are all collective protective measures. They are inherently more reliable than measures that depend on individual workers doing the right thing.

Step 3: Mitigate the consequences of a fall. Where preventing a fall is not reasonably practicable, measures must be in place to reduce the distance and consequences of any fall — safety nets, airbags, or personal fall arrest systems.

Only when the first two steps have been exhausted should individual fall arrest equipment (harnesses and lanyards) be relied upon as the primary protection measure.

When Are Ladders Acceptable?

Ladders are the most commonly misused piece of equipment in work at height. They are also the subject of more HSE enforcement action than almost any other piece of equipment.

The Regulations do not ban the use of ladders. They require that ladders are used only when the risk assessment demonstrates that using more suitable work equipment is not justified because of the low risk and the short duration of use, or existing features on site that cannot be altered.

The HSE guidance makes the conditions for acceptable ladder use more specific:

• The work must be of short duration — typically no more than 30 minutes at a time
• The work must be light duty — the worker should be able to maintain three points of contact with the ladder, meaning they cannot be carrying heavy or awkward loads
• The ladder must be on a stable surface capable of supporting the base
• The ladder must be at the correct angle (75 degrees, or the 1-in-4 rule: 1 metre out at the base for every 4 metres up)
• The ladder must extend 1 metre above any landing point where there is no other suitable handhold
• The ladder must be secured at the top, or if that is not practicable, footed by a second person

Step ladders are subject to similar conditions. They should not be used for work that requires the worker to stand on the top two rungs or the top platform.

Scaffold vs MEWP

For work of longer duration or where ladders are not suitable, the two most common alternatives are scaffolding and mobile elevated work platforms (MEWPs).

Scaffolding (tube-and-fitting or system scaffold) provides a stable, load-bearing platform suitable for extensive works. It must be erected and dismantled by a competent scaffolder and inspected by a competent person before first use, at intervals not exceeding 7 days, and after any event likely to have affected its stability. Inspection records must be kept.

MEWPs (scissor lifts, boom lifts, cherry pickers) offer flexibility and speed of deployment. Operators must be trained and, for most MEWPs, hold a relevant industry training board qualification. MEWPs must be inspected before use and serviced in accordance with the manufacturer's schedule. Ground conditions must be assessed before any MEWP is positioned.

Fall Arrest Equipment

When collective measures are not practicable and fall arrest is required, workers must be provided with appropriate personal fall protection equipment — typically a full body harness, a lanyard, and an anchor point capable of withstanding the arrest forces.

The selection and use of fall arrest equipment requires careful assessment:

• The free fall distance must not exceed 2 metres under UK working regulations (less in confined spaces)
• The clearance distance below the worker must be sufficient to arrest the fall before the worker strikes a lower surface, accounting for lanyard length, harness stretch, and deployment distance
• Anchor points must be rated to at least 15 kN for personal fall arrest use
• Workers must be trained in donning and doffing equipment, pre-use inspection, and rescue procedures — because a worker suspended in a harness following a fall is at risk of suspension trauma within minutes

Rescue plans must be in place before any work involving fall arrest equipment begins. Calling 999 is not an adequate rescue plan.