Working at height: why it matters
Falls from height are the single biggest cause of fatal injuries in UK construction. That is why working at height appears in every version of the CITB Health, Safety and Environment test.
The law is the Work at Height Regulations 2005, and it applies at any height where a fall could cause injury, not just above an arbitrary level. The duty is to plan, supervise and use the right equipment.
Working at height revision notes
Examiners keep returning to one idea: falls are stopped by planning and the right equipment, not by being careful. Learn the avoid, prevent, minimise hierarchy below and most working at height questions answer themselves.
Avoid, prevent, minimise
First ask if the work at height can be avoided. If not, prevent falls with collective protection (guardrails, a scaffold, a MEWP). Only as a last resort use personal protection such as a harness to minimise the consequences of a fall.
Applies at any height
The Regulations apply wherever a fall could cause injury, there is no safe threshold below which they stop applying. A fall from a low platform onto reinforcing bars can still be fatal.
Guardrail standards
A working platform needs a main guardrail at least 950mm high, an intermediate rail so the gap is no more than 470mm, and a toe board to stop objects falling.
Ladders are for short work
Use ladders only for light, short-duration work, around 30 minutes in one position. Set them at 75 degrees (a 1 in 4 ratio), secure them, and keep three points of contact.
Falling objects
People below are at risk too. Use toe boards, brick guards, nets or covered walkways, and never throw materials down from height.
Fragile surfaces
Roof lights, asbestos cement sheets and old roofs can give way. Use crawling boards, staging and guard rails, and treat any roof as fragile until proven otherwise.
Hear a question in Polish
Height questions often turn on a single word, whether a control prevents a fall or only minimises its consequences. Press Play in Polish below to hear a real question read aloud while you read the English, so the wording never trips you up.
What is a common sign that a scaffold is unsafe?
It appears new
It has loose or missing components
It has been painted recently
It is not in use
Every wrong answer can also come with an AI explanation that points to the specific rule behind the correct answer, so you learn from each mistake instead of just memorising. Native Polish audio and AI explanations are two things you will not find on other CSCS practice sites.
Working at height quiz, five questions
Five working at height questions in the real CITB format. Watch for the ones testing whether collective protection or a harness comes first, that is where people slip up. Answer each one and it is marked straight away, with the reason it is right.
0 of 5 answered
Score: 0 / 5
Q1. What is the most important factor to consider when working at height?
Reveal explanation
Correct answer: C. Using the correct equipment
Using the correct equipment is essential to ensure safety when working at height.
Q2. Which of the following equipment is NOT suitable for working at height?
Reveal explanation
Correct answer: C. A folding chair
A folding chair is not designed for safe use at height and should never be used.
Q3. What should be the first step before starting any work at height?
Reveal explanation
Correct answer: C. Perform a risk assessment
Conducting a risk assessment is crucial to identify potential hazards and implement control measures.
Q4. How often should ladders be inspected?
Reveal explanation
Correct answer: C. Before use
Ladders should be inspected before use to ensure they are in good condition and safe to use.
Q5. What is the purpose of a guardrail on a scaffold?
Reveal explanation
Correct answer: C. To prevent workers from falling
Guardrails are designed to prevent workers from falling off the scaffold.
Answer all five to see how you did on working at height
The real CITB test is 50 questions in 45 minutes, with a 45 out of 50 pass mark. Our free mock test uses the same format and needs no account.
Common mistakes
These are the working at height beliefs that get people hurt on real sites, not just marked wrong in the test. Unlearn them before you go up.
Mistake 1: “The rules only apply above 2 metres.”
Correct: There is no height threshold. The Work at Height Regulations apply wherever a fall could cause injury. People are killed in falls from below 2 metres every year.
Mistake 2: “A harness is the first choice for fall protection.”
Correct: A harness is a last resort. Collective protection that prevents a fall (guardrails, scaffold, a MEWP) protects everyone and comes first. A harness only limits the consequences of a fall that still happens, and needs an anchor and rescue plan.
Mistake 3: “Ladders are banned on site.”
Correct: Ladders are not banned. They are allowed for light, short-duration work where the risk is low, provided they are the right ladder, secured and used correctly.
Related CSCS topics
Working at height rarely stands alone on site. These related areas share the same planning and protection thinking: