BS EN 747 Guard Rail Height Requirements
UK bunk beds must meet BS EN 747, which requires the top-bunk guard rail to rise at least 16cm above the mattress surface. This measurement is taken from the top of the mattress to the top of the rail and ensures a child cannot roll out while sleeping. Always use the maximum mattress depth stated by the manufacturer so the rail still meets the 16cm rule once the mattress is fitted.
What Is BS EN 747?
BS EN 747 is the British and European safety standard for bunk beds and high beds. It covers design, construction and testing to prevent accidents. Compliance is mandatory for all bunk beds sold in the UK. The standard specifies guard rail height, gap limits between slats, stability, strength of ladders and entrapment hazards. Non-compliant beds cannot legally be sold.
Guard Rail Height Explained
The 16cm minimum height is measured vertically from the top surface of the mattress to the top edge of the guard rail. This applies to both long sides of the top bunk; the side with the ladder may have a gap for access but must still prevent falls. If you choose a thicker mattress than the bed is designed for, the effective rail height decreases and may fall below the legal 16cm, making the bed non-compliant. Check the product page for the maximum mattress depth allowed.
Why the 16cm Rule Matters
A rail lower than 16cm increases the chance of a sleeping child rolling over the edge. The measurement accounts for typical movement during sleep and the compression of most mattresses. This rule, combined with rounded edges and no sharp corners, forms the core fall-prevention requirement of BS EN 747.
Practical Checklist Before Buying
- Confirm the bed carries a permanent BS EN 747 label or certificate.
- Verify the stated maximum mattress depth leaves at least 16cm of rail above the mattress surface.
- Measure any mattress you already own against the bed’s limit.
- Check that gaps between guard rail bars are no more than 6cm to prevent head entrapment.
- Ensure the ladder is securely fixed and meets strength tests.
- Never use the top bunk for children under 6 years old.
For safe choices start with our Wooden Bunk Beds or Standard Bunk Beds ranges, all tested to current regulations.
Common Guard Rail Mistakes to Avoid
Many parents fit a mattress that exceeds the bed’s stated maximum depth. This pushes the sleeping surface higher and reduces the rail height below 16cm. Another error is adding after-market bed rails or padding that alters the original tested geometry. Always buy the mattress and bed together or confirm compatibility using the exact figures on the product page. Top bunks are not suitable for children under 6 even when rails meet the standard.
Recommended Bunk Bed Types for Safety
Low-level bunk beds and models with integrated staircases reduce fall risk further while still meeting the 16cm rail rule. Staircase designs replace vertical ladders with safer angled steps and often include storage. Shorty bunk beds are lower overall and ideal for younger children who meet the age minimum. Metal and wooden frames both comply when tested, but wooden models tend to have solid side panels that exceed minimum rail heights.
See the full selection of Bunk Beds With Stairs or Shorty Bunk Beds for designs that combine the required rail height with easier access.
Matching Mattresses and Accessories
Use only mattresses that fit within the maximum depth limit printed on the bed. A single mattress is standard for most UK bunk beds. For extra safety add a Noomi Clip On Storage Unit to keep bedtime items tidy without cluttering the top bunk. All mattresses sold in the UK must meet BS 7177 fire safety; check the product page for compliance.
Decision Rules for Safety-Conscious Buyers
- If the bed states a maximum mattress depth of 15cm, only use mattresses 15cm or thinner to guarantee 16cm rail height.
- Prefer models with full-length guard rails on both long sides plus an additional 5–10cm clearance above the minimum.
- Choose staircase or low bunk designs for children aged 6–10.
- Always request the manufacturer’s BS EN 747 test report if not clearly shown online.
Browse Bunk Beds to compare options that satisfy these rules.
| Bed Type | Typical Rail Feature | Best For |
|---|---|---|
| Standard Wooden Bunk | Fixed rail ≥16cm above mattress | Everyday family use |
| Staircase Bunk | Integrated stairs, solid panels | Younger compliant children |
| Shorty Bunk | Lower height, same 16cm rule | Smaller rooms, ages 6+ |
| L-Shaped Bunk | Extended rail on upper level | Shared bedrooms needing floor space |
Our picks for this guide
- Flair Eloise Bus Bunk Bed White – Tested to BS EN 747 with full-length guard rails that maintain the required 16cm height above the mattress.
- Flair Deimo Staircase Low Bunk White – Low overall height combined with staircase access and compliant 16cm guard rails reduces fall risk while meeting the standard.
- Flair Plation Low Play House Shorty Bunk White – Shorty design keeps the top bunk lower; guard rails exceed the 16cm BS EN 747 minimum when used with approved mattress depths.
- Recoil Shuttle Gaming Bunk Bed Black & Red – Meets BS EN 747 safety testing including the mandatory 16cm guard rail height for the upper bunk.
Frequently asked questions
Does BS EN 747 apply to all bunk beds sold in the UK?
Yes. Every bunk bed offered for sale must comply with BS EN 747. Importers, manufacturers and retailers are legally required to ensure the guard rail rises at least 16cm above the mattress and that the bed passes all entrapment, stability and strength tests. Look for the standard marking on the bed frame.
Can I add my own rail or padding to an older bunk bed?
Adding extra rails or padding can invalidate the original BS EN 747 test. Any modification changes the geometry and may create new entrapment gaps. It is safer to replace an older bed with a current compliant model such as those in our wooden or standard bunk ranges rather than altering it.
What age can a child sleep in the top bunk?
BS EN 747 guidance and general safety advice state that the top bunk is not recommended for children under 6 years old. Even with a 16cm guard rail, younger children lack the coordination and awareness to use a ladder safely at night. Lower sleeper options or single beds are better for this age group.
How do I measure if my chosen mattress will keep the rail at 16cm?
Check the bunk bed’s product page for the exact maximum mattress depth allowed. Subtract that depth from the rail height measured on the empty frame. The difference must be 16cm or more.
Are triple or L-shaped bunk beds subject to the same rail rule?
Yes. All beds with an elevated sleeping position, including triple bunk beds and L-shaped designs, must meet the 16cm minimum guard rail height on every upper level. Models such as the Flair Oscar or Flair Stepaside have been tested to BS EN 747; always confirm the mattress depth limit on the individual product page.
Related guides
- Cabin Bed Height and Ceiling Clearance Guide
- Bunk Bed Mattress Safety Standards Every UK Parent Should Know
- Small Double Bed Room Size Requirements UK
- Maximum Mattress Depth for Bunk Beds with Guard Rails
- How to Protect a Bunk Bed Mattress from Dust and Mites
- Choosing Bed Height for Rooms with Low Windows