One or two step changes in elevation should be avoided, and the intersection of dif- ferent floor finishes should be at the same level.
Inspection and maintenance can help remove tripping hazards. Protruding nails and screws should be removed or set even with the floor surface. Damaged tile, floor boards, or carpet should be repaired. Curled or wrinkled mats or flooring should be removed and electrical cords or similar objects that extend across walking zones should be recessed. (When there are temporary runs of electrical or communication cables across a walking zone, the cords should be taped down to minimize tripping hazards or should be routed overhead.)
Changes in elevation often are hard to see, but they can be made more visible by making different levels different colors. Avoid textured patterns that tend to hide changes in elevation. Changing levels should be well lit and warning signs should be posted at locations where there are tripping hazards. Direct or reflected glare that can interfere with the ability to see changes should be avoided.