A common sidewalk vault structure consists of an approximately four-inch thick slab of sidewalk, supported by a structural slab four to six inches thick. Many commercial buildings have space below the sidewalk, adjacent to the building and usually the basement. A sidewalk vault provides a lid (cover) for storage and/or access to a basement. This space can be utilized for both steps going down to a basement and/or storage. Vault space is commonly used for housing mechanical equipment, such as boilers, tanks, heaters, pipes. Many vaults are vented and may have access hatches with steps or mechanical hoists. If you are planning to build a sidewalk vault structure then contact Tony’s Masonry in NYC.