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Key Terms

Floor hole: An opening in the floor, platform, or pavement that measures less than 12 inches, but more than 1 inch; and through which materials, but not people, may fall.

Floor opening: An opening in the floor, platform, or pavement that measures 12 inches or more, and through which people may fall.

Wall opening: An opening in a wall or partition that is at least 30 inches high and 18 inches wide, and through which people may fall.

Standard railing: Consists of a top rail, midrail, and posts. The height from the upper surface of the top rail to the floor level is 42 inches. The midrail height is one-half as high as the top rail (21 inches).

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