17:14A-86. Standards for vaults Vaults shall have walls, floors and ceiling of reinforced concrete at least 12 inches in thickness constructed as follows: a. Two grids of #5 ( 5/8 " diameter) deformed steel bars located in horizontal and vertical rows in each direction to form grids not more than four inches on center; or b. Two grids of expanded steel bank vault mesh placed parallel to the face of the walls, weighing at least six pounds per square foot to each grid, having a diamond pattern not more than 3 " x 8 " ; or c. Two grids of any other fabricated steel placed parallel to the face of the walls, weighing at least six pounds per square foot to each grid and having an open area not exceeding four inches on the center; d. Grids are to be located not less than six inches apart and stagger in each direction; e. The concrete shall develop an ultimate compression strength of at least 3,000 pounds per square inch; f. Electric conduits into the vault shall not exceed 1 1/2 inches in diameter and shall be offset within the walls, floor or ceiling so as not to form a direct path of entry; and g. A vault ventilator, if provided, shall be designed with consideration of safety to life without significant reduction of the strength of the vault wall to burglary attack. L.1983, c. 566, s. 17:14A-86.
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