Hollow metal doors shall be constructed of 12 to 14 gauge steel inside the security perimeter. Eighteen gauge hollow metal doors may be used outside the security perimeter. Plate doors shall be constructed of material not less than 3/16 inch thick. The security quality of each detention door shall be determined by the level of security sought to be achieved. Detention doors shall be equipped with detention hardware and accessories.
37 Tex. Admin. Code § 261.246