Ladder + Scaffold Safety Reference
Why this matters
Falls are the #1 cause of death in construction (OSHA 2024). Ladder + scaffold misuse + missing fall protection take more lives than any other workplace hazard. The 30 seconds spent setting up correctly saves a career-ending injury OR a death. This is the field card.
OSHA ladder requirements (29 CFR 1926.1053)
Inspection before use: cracks, missing rungs, damaged rails, worn feet, oily steps.
Set up on stable surface: not on ice, mud, soft soil. Use leg leveler if uneven.
Angle (extension ladder): 4:1 ratio. 4 ft up = 1 ft out from base. Ladders too steep tip backward; too shallow tip forward.
Extension above landing: extension ladder rails extend 3 ft above the upper landing surface (roof edge).
3-point contact at all times: 2 hands + 1 foot OR 1 hand + 2 feet. Don't carry load that requires both hands.
No standing on top 2 rungs of stepladder OR top 4 rungs of extension ladder.
Tie off the top OR have helper hold base if ladder over 20 ft OR on slick surface.
Ladder types + ratings
Type IAA: 375 lb load. Extra-heavy commercial / industrial.
Type IA: 300 lb load. Heavy commercial.
Type I: 250 lb load. Commercial / professional.
Type II: 225 lb load. Light commercial / professional.
Type III: 200 lb load. Household / DIY (avoid for service trades).
Get Type IA OR better: pro service techs + tools + materials easily exceed 200 lb.
Ladder materials
Aluminum: lightweight, doesn't rot. CONDUCTS ELECTRICITY (never use near live wires OR overhead power lines).
Fiberglass: non-conductive (required for electrical work). Heavier, more expensive.
Wood: traditional, non-conductive. Heavier; warps + degrades.
Specific ladders for trades
Stepladder (A-frame): 4 ft - 12 ft; freestanding.
Extension ladder: 16 ft - 40 ft (closed length 8 - 20 ft); reaches high.
Articulating ladder (Little Giant): configurable A-frame + extension + scaffold base. Versatile.
Multi-position ladder (Werner): similar to articulating.
Platform stepladder: extra-stable for prolonged work; bigger platform.
Attic ladder: built-in pull-down (usually 8 ft, sometimes 10 ft).
Scaffold types + use
Single-tier rolling scaffold: 6 - 10 ft height. Workspace 5 ft × 7 ft typical. Common HVAC + ceiling work.
Multi-tier rolling scaffold: stacked frames; 12 ft - 30 ft height.
Frame scaffold: traditional fixed scaffold; tied to building.
Pump jack scaffold: extends along wall; siding, painting, roofing.
Boom lift / scissor lift: motorized; rentable.
Scaffold safety (29 CFR 1926.451)
Capacity: 4x rated maximum intended load.
Decking: solid platform; no gaps over 1".
Guardrails: 39" - 45" top rail; 21" mid-rail; toeboard at 4".
Cross-bracing: required per frame.
Outriggers / stabilizers: required for height > 4x base width.
Fall protection: required > 10 ft (per OSHA construction standard).
Inspection: by competent person before each shift.
Fall protection (above 6 ft - construction; 4 ft - general industry)
OSHA 1926.501: fall arrest required > 6 ft (construction).
Three components:
- Anchor point: rated 5,000 lb; structural connection
- Harness: full-body, NOT single-point belt (causes internal injury)
- Connector: shock-absorbing lanyard OR SRL (self-retracting lifeline)
Lanyard length: such that worker falls < 6 ft AND doesn't strike lower level.
SRL (self-retracting lifeline): stops fall within 3 - 4 ft. Used in tight spaces.
Roof anchor types
Permanent anchor: bolted into rafters; stays in place. Solar + recurring service.
Temporary anchor: nailed into rafters; removed at end of job.
Reusable anchor: clamped to structure; transferable.
Anchor point must be ABOVE worker when possible (limits free-fall distance).
Common ladder accidents + causes
Ladder slip-out at base: insufficient angle OR slippery surface.
Ladder tip-back: too steep OR over-reaching at top.
Ladder slip sideways: foot off rail OR weight shift.
Falls from top: standing on top 2 rungs, over-reaching.
Electrical contact: aluminum ladder + overhead power.
Set-up on uneven ground: ladder tips during use.
Carrying ladder solo: drop on head; pinch fingers in extension.
Common scaffold accidents
Wheels not locked. Decking gaps. Missing guardrails. Overloading capacity. Working in wind > 15 mph elevated. Not tying multi-tier to building.
Setup checklist (ladder)
- Inspect: no damage
- Surface: stable, level (use leveler if needed)
- Angle: 4:1 ratio
- Top extends 3 ft above landing
- Tie off OR have helper if > 20 ft OR slick surface
- Tools in tool belt OR pull up with rope (not carried up)
- 3-point contact at all times
Setup checklist (scaffold)
- Inspect: cross-bracing tight, decking solid, wheels lock
- Level: shimmer if needed
- Outriggers OR ties: per height
- Guardrails + toe boards
- Access ladder included (not climbing frame)
- Wheels locked when working at height
- Fall arrest above 10 ft
Working on roof
Slope class:
- Low slope (≤ 4/12): standard fall protection
- Moderate (5/12 - 7/12): slip-resistant boots + fall protection
- Steep (8/12+): roof brackets + fall protection + harness mandatory
Roof brackets (Henry Brackets, Pure Energy): nailed into rafters; planks supported.
Roof jacks: temporary peg + plank system; older standard.
Toe boards: nailed below where you stand; catches slip.
Cold + wet weather
Ice / wet conditions: don't work on roof OR steep ladder; reschedule.
Boots: slip-resistant, lugged.
Gloves: maintained dexterity; not bulky on rungs.
Common ladder + scaffold mistakes
Wrong ladder type rating (consumer light-duty for pro service). Skipping inspection. Working alone above 20 ft (no one to call help). Set up wrong angle. Reaching too far sideways (over-reach tip). Tools at top with no belt (drop on head). Skipping fall protection thinking "it's a quick job". Aluminum ladder near power lines. Standing on top step. Scaffold without guardrails. Scaffold over-loaded. Working in wind.
OSHA enforcement
Fall hazard violations: top-5 most-cited every year (OSHA TOP 10).
Penalty per violation: $15,625+ (2025 levels).
Repeat / willful: up to $156,259.
Criminal charges possible for fatality from willful violation.
NEVER work above 6 feet without proper fall protection (harness + anchor) - even for a "quick" job. Roofs + ladders + ledges that look stable have killed thousands of workers. The 5 minutes to anchor + harness + connect is the cheapest insurance you'll ever buy. A fall from 12 feet to concrete will likely paralyze OR kill. The job will still be there in 5 minutes; you might not be. Fall protection is not optional. Set up + use it every time, regardless of how confident you feel.
References
- OSHA 29 CFR 1926.1053 (Ladders)
- OSHA 29 CFR 1926.451 (Scaffolds)
- OSHA 29 CFR 1926.501 - 503 (Fall Protection)
- ANSI A14.1 - A14.5 (Ladder Standards)
- ANSI/ASSE A10.8 (Scaffold Safety)
- Manuall internal: PPE Selection by Task, OSHA Quick Reference