Construction Safety Basics

Construction is one of the most dangerous industries — and almost every serious injury is preventable. Safety is skill #1.

OSHA's "Focus Four"

The four hazards that cause the most construction deaths — learn to spot and avoid them:

1. Falls — from roofs, ladders, scaffolds, openings (the #1 killer).
2. Struck-by — vehicles, falling objects, swinging loads.
3. Caught-in / between — trenches, machinery, materials.
4. Electrocution — contact with power lines or live circuits.

Protect yourself

• PPE — hard hat, safety glasses, gloves, boots, hi-vis, plus hearing and respiratory protection when needed.
• Fall protection at height; inspect ladders and scaffolds.
• Look out for each other — report hazards, follow lockout/tagout, keep the site clean.

Going Deeper (Intermediate)

Beyond "wear your PPE," safety on a real jobsite runs on a hierarchy of controls — the order OSHA wants you to think in:

1. Elimination — remove the hazard entirely (do the cut at the ground, not on the roof).
2. Substitution — use a less dangerous method or material.
3. Engineering controls — guardrails, machine guards, ventilation, GFCI protection.
4. Administrative controls — training, signage, rotating workers out of heat.
5. PPE — the last line of defense, not the first.

PPE is at the bottom on purpose: a harness only matters when the better controls above it have failed.

Advanced / Pro-Level

Fall protection is the #1 OSHA citation in construction, every year. The trigger height is 6 feet in construction (general industry is 4 ft). At that point you need one of: guardrails, a personal fall-arrest system (PFAS), or a safety net.

A compliant PFAS is the "ABCD":

• Anchor — rated for 5,000 lb per worker (or engineered to 2:1 safety factor).
• Body harness — full-body, never a body belt.
• Connector — shock-absorbing lanyard or self-retracting lifeline (SRL).
• Deceleration/clearance — do the fall-clearance math: a 6-ft lanyard + 3.5-ft deceleration + your height + safety margin can be ~18.5 ft. Tie off below that and you hit the ground before the system stops you. This is why high tie-off points and SRLs matter.

Other pro-level fundamentals: lockout/tagout (LOTO) before servicing energized equipment, the competent person requirement for excavations and scaffolds, and reading a Safety Data Sheet (SDS) before using any chemical.

Practice Challenge

A worker uses a 6-ft shock-absorbing lanyard tied off at foot level. With ~3.5 ft of deceleration distance, ~6 ft of worker height below the D-ring, and a 2-ft safety factor, what total fall clearance is needed — and is a 15-ft elevation safe? (Answer: ~6 + 3.5 + 6 + 2 ≈ 17.5 ft needed; 15 ft is not enough — use an SRL or a higher anchor.)

In Practice

Picture a worker on a roof reaching for a tool with no fall protection. One slip — and a fall from even 10 feet can be fatal. That single decision to 'just be careful' instead of tying off is how preventable tragedies happen. Safety equipment feels slow until the moment it saves your life.

Common Mistakes to Avoid

• Skipping PPE because a task is 'quick'
• Not using fall protection at height
• Standing or walking under a suspended load
• Seeing a hazard and saying nothing instead of reporting it

Takeaway: Know OSHA's Focus Four — falls, struck-by, caught-in, electrocution — and wear your PPE. Going home safe is the job.

Educational overview — not a substitute for hands-on training, OSHA safety training, or an accredited program. Always follow your employer's and OSHA's official safety requirements.