Three ( 3 ) 8 ' x 8 ' Communication Shelters for MnDOT

2026-11-03

The purpose of this Contract is to provide three ( 3 ) 8 ’ X 8 ’ communication shelters used to cover and protect MnDOT ’ s Intelligent Transportation Management System ( TMS ). Specifications include , but are not limited to : 7 . 1 The TMS Shelter Cabinet must conform to the latest edition of the International Building Code and Chapter 1323 of the Minnesota Energy Code . 7 . 2 The manufactured shelter must provide a temperature - controlled environment for electrical , electronic , fiber optic devices , and comply with the following additional specifications : 7 . 2 . 1 The shelter size must be nominally : 8 ’ W ( OD ) X 8 ’ L ( OD ) X 8 ’ H ( ID ) and be designed to mount to a concrete slab foundation . The plans and details for this foundation must be provided by the shelter manufacturer . 7 . 2 . 2 5052 - H32 aluminum ASTM B209 ( marine grade ) must be utilized for the exterior construction . 7 . 2 . 3 The interior walls must be covered with minimum ½ inch thick fire - retardant plywood and faced with white coating or sheeting . 7 . 2 . 4 No wood products must be used for construction of the shelter except for the interior face of the walls . 7 . 2 . 5 The electrical distribution panel must be rated for 120 / 240 VAC , 60 A . 7 . 2 . 5 . 1 The main breaker must be a 60 amp 2 pole . 7 . 2 . 5 . 2 Each branch circuit must be rated at 20 A . 7 . 2 . 5 . 3 All circuit breakers must be labeled appropriately . 7 . 2 . 5 . 4 In addition to the required breakers , four spare breakers rated at 20 A must be installed and labeled as SPARE . 7 . 2 . 5 . 5 The panel must have a 1½ ” metal conduit running to the side wall with a 1½ ” rigid type - LB threaded conduit body connected on the exterior wall for future service conductors . 7 . 2 . 6 One master ground bar made of copper must be installed to the left or right of the conduit / cable entrance tower 2 feet above the floor and mounted off the wall using electrical isolators . The dimensions must be 0 . 25 ” thick , 4 .” wide and 12 ” long .

Minnesota

2026-05-02