It's the law, not just good manners
The construction housekeeping standard, OSHA 29 CFR 1926.25, spells out three duties:
- 1926.25(a) — form and scrap lumber with protruding nails, and all other debris, shall be kept cleared from work areas, passageways, and stairs, in and around buildings or other structures.
- 1926.25(b) — combustible scrap and debris shall be removed at regular intervals during construction, and a safe means provided to remove it.
- 1926.25(c) — containers shall be provided to collect and separate waste, trash, oily and used rags, and other refuse; the ones holding oily, flammable, or hazardous waste need covers; and garbage gets disposed of at frequent and regular intervals.
The general walking-working-surfaces rule, 1910.22(a), backs it up: places of employment and passageways kept clean and orderly, floors kept clean and dry, and surfaces free of hazards like sharp or protruding objects, loose boards, leaks, spills, snow, and ice.