The height threshold requiring scaffolding varies by jurisdiction and application context, but core regulatory principles include:

‌General construction fall protection‌:
Scaffolding or equivalent fall protection systems are typically mandated for work platforms ‌≥2 meters (≈6.5 feet)‌ above lower levels. This aligns with international safety frameworks like the UK’s Work at Height Regulations and OSHA standards.

‌Site-specific security measures‌:
For scaffolding itself, unauthorized access prevention (e.g., perimeter fencing, ladder removal) is required regardless of height when public exposure exists, as falls from even low-level incomplete structures pose fatal risks, especially to children.

‌Structural engineering thresholds‌:
Specialized systems like attached suspended scaffolds (e.g., facade access) require certified designs and anchoring when exceeding ‌6 meters‌ in height, with additional wind-load calculations for elevations ‌>15 meters‌.