At the Fire Service Technical College at Moreton-in-Marsh, Gloucestershire, England, the middle ranks of the Fire Service are trained in unusual concrete training structures. The buildings and facilities on the fire ground are said to be the most advanced in the world. Initially the buildings presented a number of design and structural problems as they had to withstand repeated heating and quenching. Investigations were made in England and the United States as to the most suitable materials and type of construction. As a result of these experiments it was decided to build the walls, floors, and roofs of the various structures of monolithic cast-in-place reinforced concrete with a 28 day cube strength of 28 Newtons per square millimeter. Exposed concrete inside the buildings is protected by refractory material: walls and ceilings are covered with an 18 millimeter thick facing layer of tiles shot-fired into the concrete walls and bolted to ceilings. Floors are laid to walls without screeds and protected by movable floor tiles similar to the others. Heavy standard steel window frames are fixed directly to the concrete and painted with heat-resistant black paint. A curtain of water from drenchers protects windows from heat. Concrete sill gutters lined with galvanized steel collect the cooling water. The buildings which form the nucleus of the fire-ground complex include an eight story drill tower for training with hook ladders and other types of ladder, two industrial buildings, a transformer building, a house and a section of a ship. Realistic fire situations are created with free-burning materials or by smoke generators and electrically generated heat. In the transformer building fires are simulated by spilling oil or by explosion.