All of the camps were constructed according to the War Department's specifications, which included barbed-wire fences, guard towers, and armed guards around the perimeter. The camps were organized in "blocks" consisting of twelve to fourteen barracks, a mess hall, communal showers and toilets, laundry facilities, and a recreation hall. Each barracks was divided into four or six rooms with each room housing one family, no matter how large, and there was no running water. The furnishings that Japanese Americans found on their arrival were canvas cots, a potbellied stove, and a single bare light bulb. The thin walls offered little protection from the harsh weather, which ranged from 110 degrees in the summer to 25 degrees below zero on winter nights. The flimsy construction allowed no privacy and made normal family life difficult. Camp inmates improved their own living conditions by creating interior walls and partitions, constructing furniture from scrap lumber, and planting gardens.