Ideal for keeping your construction site safe, our Construction Area Authorized Personnel Only safety signs are designed to comply with OSHA standards for accident prevention signs. Safety signs with Danger headers at the top like this one are perfect for hazards which, if not avoided, will result in death or serious injury. Available in you choice of size from 10 × 7″ to 48 × 36″ in plastic, aluminum, or adhesive-backed vinyl.