The Launch Tube serves the purpose of a humidity and temperature controlled structure that provides a protective housing that combines both a launch support facility and structure. The Launch Tube also functions as a launch pad for the Minuteman missile. The Launch Facility is comprised of an underground Launch Tube (missile silo) that is surrounded by a cylindrical upper and lower equipment room providing the Launch Facility the capacity to house, monitor, and launch the missile within short notice. Thus the terminology - Minuteman missile. The Launch Tube is covered by a hardened, three and a half feet thick, Launcher Closure Door weighing 110 tons.
Located approximately 21 feet above the floor of the Launch Tube are a series of pulley blocks welded to the walls of the launch tube. These pulley blocks make up the three point suspension system that is designed to cushion and absorb any significant impact to the Launch Facility, protecting the Minuteman missile from any damage in the event of an enemy attack comprising of a nuclear detonation.
For more specific photos of the equipment housed in the upper and lower launcher equipment rooms, follow the links below.