# Scottish Building Standards, Section 4: Safety
Safety in the Scottish Handbooks is where "don't kill or seriously injure anyone" gets written down. It's wider than just slips and trips, it also swallows up things like domestic electrics (instead of a separate Part P).
This guide keeps it practical and builder-focused.
1. What "Safety" covers
Section 4 in the Scottish Technical Handbooks is about protecting people from physical harm in and around the building:
- Structure in use · people not falling through floors, off stairs or balconies.
- Impact · people not being badly hurt by glass, projections, or failed fixtures.
- Guarding · around stairs, landings, windows, balconies, roofs.
- Access · safe access routes, ramps, handrails.
- Electrical safety in dwellings · this is where Scottish domestic electrical work lives, not in a separate Part P.
- Protection from falling, collision and impact more generally.
There's Domestic and Non-Domestic, but the core idea is the same: build so normal use doesn't wreck someone.
2. Mandatory standards vs guidance
Same setup as the other sections:
- Short mandatory standards: e.g. "Every building must be designed and constructed so that people can move safely within the building," and "A dwelling must be designed and constructed so that electrical installations are safe."
- Detailed guidance: dimensions, heights, loadings, layouts, and reference to British Standards you can follow to be "deemed to satisfy."
If you build to the guidance (stairs, guarding, glass, electrics), you're assumed to hit the standard.
3. Stairs, ramps and guarding
This is where you feel Safety on almost every job.
The guidance covers:
- Stair geometry · rise, going, pitch, headroom, consistency.
- Handrails · where needed, heights, continuity.
- Guarding heights and designs for stairs and landings, balconies, galleries, flat roofs used as terraces, and windows with low sills.
On site:
- Stair sizes are not a guess. Build the number of risers, tread depth and pitch shown on the warrant drawings or compliant with the Handbook tables. No "we had to adjust it a bit so it fit" without redesign.
- Handrails go in where the drawings and Handbook say · on the correct sides, at correct height, continuous where required. Don't leave them off because "it looks cleaner."
- Balustrades and guarding must be the right height and construction to prevent falls. Gaps must not be so big a child can get through or stuck.
If you change stair layouts, landings, or remove guarding to "open things up," you're straight into non-compliance with the Safety section.
4. Glazing and impact
Safety sets rules for glazing where people might walk into or fall through:
- Safety glass required in "critical locations" · low-level glazing in doors and side panels, big windows near floor level, glass in or near stairways.
- Rules for impact resistance and how glass should be marked.
- Barrier glazing (glass balustrades) has its own load and fixing requirements.
On site:
- Don't swap a specified safety glass unit for a standard one because it's cheaper or "in stock."
- In areas with heavy traffic or where people could fall against the glass, treat it as a structural/safety element, not decorative.
- Follow the fixing and framing details for glass barriers exactly · the glass isn't magic; it only works if the supports do.
If you just see "glass" on a drawing and treat it all the same, you can easily blow the Safety standard.
5. Windows, openings and falls
The Safety section deals with people falling from windows and openings:
- Guarding or restricted openings needed where window sills are low and there's a drop.
- Rules for restrictors in certain situations (especially where children are likely present).
- Guarding for external drops (steps, retaining walls, lightwells) in certain height ranges.
On site:
- If you lower a window sill or fit a big opening light where there's a drop outside, check the guarding/restrictor requirements.
- Don't remove existing guards or restrictors in refurbishments without checking what should replace them.
- Any change to floor levels or external ground that increases the effective height of a drop may trigger guarding · not just "tidying up."
6. Electrical safety in dwellings, no Part P, but real rules
Instead of Part P, Scottish domestic electrical safety sits inside the Safety section and the expectation to comply with BS 7671 and the building standards.
The Handbooks say:
- Electrical installations in dwellings must be designed, installed, inspected and tested so they're safe for normal use.
- Work should comply with BS 7671 (IET Wiring Regulations) or equivalent standards.
- For warrant-related work, you'll often see a requirement for appropriate certification and evidence of compliance.
On site, for domestic work:
- Treat every Scottish domestic job as needing a properly designed and tested electrical installation.
- Issue the correct BS 7671 certificates when you're done (EIC, MEIWC) · those form part of the evidence that the work meets the Safety standard.
- Work under usual UK best practice: RCD/RCBO protection where required, correct zoning in bathrooms, safe routes and depths for cables, proper earthing and bonding.
Key difference: you are not ticking a Part P form. You are proving compliance with the Safety section and BS 7671 as part of the building standards system.
7. Balconies, roofs and "let's stick a decking up there"
Safety clamps down on the casual creation of high-level spaces:
- Flat roofs used as terraces, balconies or access routes are subject to guarding, load and detailing rules.
- Timber decks at height need proper structural support and guarding.
On site:
- If a design turns a roof into a terrace, guarding and structural safety must be handled explicitly in the warrant and details · you can't just "let them use it."
- Adding ad-hoc decks, roof spaces or platforms after the fact is a Safety headache and almost always a warrant issue too.
If a client asks "can we just use this roof as a balcony?" your answer is:
"Not without going back through the design and building standards, Safety and Structure both care about that."
8. Vehicle impact and protection
In some situations (car parks, driveways near buildings, columns near traffic), Safety brings in vehicle impact considerations:
- Barriers or bollards to protect building elements and pedestrians.
- Edge protection in car parks (open sides, ramps).
On site:
- Don't delete or thin down barriers or bollards because "the client doesn't like the look."
- If you move anything that separates vehicles from people or building edges, that's a safety design change.
9. How Safety ties into warrant and completion
Same story as the other sections:
- The warrant is granted on a design that shows compliance with Safety · stairs, glass, guarding, electrics, etc.
- At completion, the verifier can inspect or ask for evidence (photos, certificates) that you've actually built to those details.
If you've tweaked stairs, removed handrails, thinned down balustrades, swapped safety glass, left low windows with no guarding, or bodged electrics with no proper certification · you're not just taking a risk. You're off the approved plan and failing the Safety standards.
10. How to stay on the right side
Pre-start
- Get the warrant drawings and look specifically at stairs, guarding, windows, balconies, glass, electrics.
- Note anything marked FD, safety glass, guarding, or similar.
During the job
- Don't alter stairs, handrails, balustrades, glazing specs, or electrical layouts without pushing it back to the designer.
- Keep your electrical certification tight and ready to share at completion.
Before completion
Walk the building with Safety in mind: "Would I let my own kids live here as-built?"
- Check the obvious: handrails on, guarding at height, safety glass where expected, extractors wired correctly, no rogue sockets in silly places.
If you treat the Safety section as seriously as Structure and Fire: not an afterthought, you'll avoid the ugly conversations where a verifier, buyer or insurer points out that the building is technically finished but practically unsafe.
What to do next
- Read: Working in Scotland · building standards explained
- Read: Scottish Building Standards · Section 1: Structure
- Read: Scottish Building Standards · Section 2: Fire
- Read: Scottish Building Standards · Section 3: Environment
- Read: SiteKiln Building Regulations Part K · Protection from falling (England) · for comparison
Sources (UK)
- Building (Scotland) Act 2003 · primary legislation.
- Scottish Building Standards: Technical Handbook (Domestic), Section 4: Safety, mandatory standards and guidance for stairs, guarding, glazing, electrics.
- BS 7671 (IET Wiring Regulations) · the electrical installation standard referenced in the Safety section.
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