Bunk Bed Guardrail Height Requirements
Bunk bed guardrail height: the short answer
360 mm is the guardrail height on Zehao standard bunk beds, measured from the top of the mattress base to the top of the rail. This 360 mm figure applies to standard bunk beds only: it does not apply to prison or correctional bunk beds, nor to custom, OEM and project-specific builds, where guardrail geometry is set by the project specification. For reference, the regulatory minimums are 260 mm above the mattress base in Australia, 160 mm above the maximum mattress line under EN 747-1:2024, and 130 mm (5 in) above the mattress top under US 16 CFR 1513. Those three figures start from different datums and must not be compared directly with the 360 mm product specification.
Direct answers
How high must a bunk bed guardrail be?
360 mm on a Zehao standard bunk bed, measured from the mattress base to the top of the rail. Scope: standard bunk beds only. Prison and correctional beds and custom or OEM builds are not covered by this figure and are engineered to the project specification. The regulatory minimums are lower and use different datums: Australia requires at least 260 mm from the mattress base with permanent guardrails on all four sides; EN 747-1:2024 is commonly summarised as 260 mm from the bed base plus 160 mm from the maximum mattress thickness line; and US 16 CFR 1513 §1513.3(a)(6) requires no less than 5 inches (130 mm) above the mattress top with the manufacturer's maximum specified mattress fitted.
What does the 360 mm threshold mean?
360 mm is a marking cut-off in the Australian mandatory standard, not a minimum guardrail height. When the guard rail is less than 360 mm above the mattress base, the bed must carry a permanent mark showing the maximum mattress height together with the words "MAX. MATTRESS HEIGHT", and that mark must be at least 160 mm from the top of the guard rail. At 360 mm or above, this particular marking obligation is not triggered. A 360 mm rail therefore gives a supplier two things at once: 100 mm of margin over the 260 mm minimum, and a simpler labelling requirement for export to Australia and New Zealand.
What is the rail height for a top bunk?
360 mm measured from the mattress base on Zehao's standard top bunk. What the sleeper actually experiences is the height above the mattress, and that depends on mattress thickness: 360 mm minus a 200 mm mattress leaves 160 mm of rail above the sleeping surface. That 160 mm is the figure the Australian marking rule and the EN 747 summaries both converge on. It also means 200 mm is the practical ceiling on mattress thickness for this rail height. Fit a 250 mm mattress and only 110 mm of rail remains, which fails the intent of the rule even though the steel frame has not changed.
Does the gap between the rail and the mattress matter?
Yes, and it is checked on the bare bed with no mattress fitted. The Australian standard prohibits gaps in three bands: 95-230 mm (head and neck entrapment), 30-50 mm (limb entrapment) and anything over 400 mm, such as a large opening in the guard rail that a sleeper could roll through. Protrusions greater than 8 mm are not allowed because they create hanging points. US 16 CFR 1513 uses a performance test instead of a list of gap sizes: with no mattress on the bed, the wedge block in Figure 1 of Part 1513 must not pass through any opening below the uppermost guardrail member when a 33-lbf (147-N) force is applied for one minute. A continuous guardrail may leave no more than 0.22 in (5.6 mm) between the rail and the end structure.
Do I need a MAX MATTRESS HEIGHT marking?
Only if the rail is below 360 mm above the mattress base and the beds are going to Australia or New Zealand. If a project specifies a shorter rail, the marking must be permanent, must show the maximum mattress height, and must sit at least 160 mm below the top of the rail. Buyers often treat this as a printing detail. It is a compliance item: it is what keeps the effective barrier height intact once the end user fits a thicker mattress than the one used for the original test.
Does the 360 mm figure apply to prison beds and custom builds?
No. The 360 mm guardrail is the specification for Zehao standard bunk beds only. Prison and correctional bunk beds, wall-mounted units, triple-tier configurations built to order, and any OEM or ODM project with its own drawings are excluded from this figure. For those products the guardrail height, gap geometry and anti-ligature details are set by the project specification and confirmed on the approved drawing before production. Do not copy 360 mm into a correctional tender without checking the project schedule.
Which standard applies to prison and correctional bunk beds?
None of the three domestic bunk bed standards should be quoted as a blanket compliance claim for correctional projects. EN 747-1:2024 explicitly excludes special-purpose bunk beds, including those for prisons, the military and fire brigades. Prison and correctional orders are normally assessed against the project specification and the local correctional authority's own requirements, with anti-ligature, anti-tamper and welded-frame criteria taking precedence over domestic guardrail geometry. Ask for the project's own schedule of requirements before quoting a standard number. Our anti-ligature design page covers those criteria separately.
How should guardrail height appear on a dimensioned drawing?
Show four separate dimensions, not one: the height from the mattress base to the top of the rail, the height from the maximum mattress line to the top of the rail, the maximum mattress thickness, and the clear opening sizes between the rails. State the measurement datum next to each figure. A drawing that says only "guardrail 360 mm" cannot be checked against any of the three standards, because the reader cannot tell whether 360 mm is measured from the floor, the bed base or the mattress surface.
Three standards compared
The table below is a buying-side summary, not a substitute for the published standards or a test report. Verify the applicable edition with your certification body before it goes into a tender.
| Market / standard | Guardrail height requirement | Measured from | Other decisive figures |
|---|---|---|---|
| Australia / NZ — ACCC mandatory standard (Consumer Protection Notice No. 1 of 2003, based on AS/NZS 4220:1994) | At least 260 mm | Top of mattress base to top of rail | Rails on all four sides; under 360 mm triggers MAX. MATTRESS HEIGHT marking at least 160 mm below the rail top; gaps must not be 95-230 mm, 30-50 mm or over 400 mm |
| European Union — EN 747-1:2024 | At least 260 mm from bed base; at least 160 mm above the maximum mattress thickness line | Bed base, and separately the marked mattress line | Applies to beds with a base 600 mm or more above the floor; does not apply to prison, military or fire-service beds. Figures here follow published summaries of the 2024 edition — confirm against the standard text |
| United States — 16 CFR Part 1513 (16 CFR 1213 for non-children's beds) | At least 5 in (130 mm) | Top surface of the mattress, using the manufacturer's maximum specified mattress thickness | Applies where the underside of the foundation is more than 30 in (760 mm) above the floor; at least two guardrails; continuous rail to end structure gap no more than 0.22 in (5.6 mm); wedge-block test at 33 lbf (147 N) for 1 minute |
| Zehao standard steel bunk bed | 360 mm | Top of mattress base to top of rail | Leaves 100 mm over the 260 mm minimum; with a 200 mm mattress, 160 mm of rail remains above the sleeping surface. Standard bunk beds only — prison / correctional, custom and OEM builds are excluded and follow the project specification |
Why 360 mm works for standard bunk bed export orders
For standard bunk beds, a single 360 mm rail simplifies production and documentation across markets. This section does not apply to prison / correctional or custom builds. The arithmetic is straightforward:
| Mattress thickness | Rail remaining above mattress (360 mm rail) | What it means |
|---|---|---|
| 150 mm | 210 mm | Comfortable margin for school and dormitory projects |
| 200 mm | 160 mm | Matches the 160 mm marking-line figure; practical maximum for this rail |
| 250 mm | 110 mm | Below the 130 mm US minimum and the 160 mm EN figure — spec a taller rail instead |
The conclusion for a buyer is simple: guardrail height and mattress thickness have to be specified together. If a tender names a 250 mm mattress for comfort reasons, the rail height has to rise with it. We confirm both figures on the model drawing before an order is released to production.
What to put in a tender or RFQ
- Guardrail height in mm, with the measurement datum stated (mattress base or mattress top).
- Maximum mattress thickness in mm, and whether a MAX. MATTRESS HEIGHT marking is required.
- The applicable standard and edition for the destination market, plus the test report reference.
- Permitted gap sizes between rails and between the rail and the end structures.
- Whether the order is a domestic or a correctional project — these follow different criteria.
- A dimensioned drawing showing all four guardrail dimensions listed above.
Sources and verification
Compiled from the ACCC Product Safety "Bunk beds mandatory standard" (Consumer Protection Notice No. 1 of 2003, based on AS/NZS 4220:1994), the US eCFR 16 CFR Part 1513, and publicly available summaries of EN 747-1:2024. EN 747 figures are summaries rather than quotations from the standard text; the published standard and the third-party test report remain the controlling documents for certification. Zehao's 360 mm guardrail is a factory specification for standard bunk beds only; prison / correctional and custom or OEM builds are excluded and follow the project specification. Request the model drawing and test report for the exact configuration quoted.
Related pages
- Metal bunk bed standard dimensions — overall sizes, berth clearance and what a dimensioned drawing must show.
- How much weight can a bunk bed hold? — static and dynamic load ratings, per berth versus whole bed.
- Anti-ligature requirements for prison bunk beds — the criteria that apply when domestic standards do not.