Final answer:
The OSHA regulations for concrete and masonry cover construction, maintenance, and demolition operations.
Step-by-step explanation:
The OSHA regulations for concrete and masonry cover a variety of operations, including construction, maintenance, and demolition.
1) Construction operations involving concrete and masonry are covered. This includes activities such as pouring and finishing concrete, laying bricks, and building masonry walls.
2) Maintenance operations involving concrete and masonry are also covered. This includes activities such as repairing and maintaining concrete structures and masonry walls.
3) Demolition operations involving concrete and masonry are also covered. This includes activities such as demolishing concrete structures and removing masonry walls.
Therefore, the correct answer is 4) All of the above.