Back injuries are the single most common cause of lost work days for New York City construction workers — and they are underreported because workers often work through the pain until the injury becomes permanent. A back injury that starts as a "minor twinge" during a heavy lift can progress to herniated discs, nerve damage, and permanent disability. Proper lifting technique is not common sense — it must be trained and practiced.

• NIOSH Recommended Weight Limit (RWL) in ideal conditions: 51 lbs for a single lift, less when conditions worsen
• Conditions that reduce the safe lift weight: lifting away from the body, twisting during the lift, asymmetric load, frequent repetition, poor hand grip
• Most construction materials (CMU blocks: 28–50 lbs each; 5-gallon buckets: 42 lbs; concrete bags: 80 lbs) exceed safe individual lift weights — team lift or mechanical assist required

• Position your feet shoulder-width apart, straddling the load when possible
• Keep the load close to your body — the farther from your spine, the greater the moment arm and spinal compression
• Bend at the hips and knees, not the waist — keep your back in its natural S-curve during the lift
• Engage your core before lifting — brace your abdominal muscles as if expecting a punch
• Lift with your legs, not your back — the quads are the strongest muscles in your body; use them
• Never twist while lifting — pivot with your feet to change direction