Some types of underground shelters that are available include bomb shelters and storm shelters. These various underground shelters come in different shapes, sizes and materials depending on the needs of the customer.
Bomb shelters and storm shelters are often made of the same material and have the same setup. The standard bomb shelter is often made from thick galvanized corrugated pipe or extremely heavy reinforced steel. The galvanized corrugated pipe style can come in different diameters, or ceiling heights, ranging from 8 feet to 12 feet, while the length can range anywhere between 20 feet to 50 feet. Multiple sections can be linked together with hatches and connectors to give each living area, like the kitchen and bedrooms, separate areas and more room.
Heavy steel bunkers can function not only as a bomb shelter but are commonly seen in storm shelters. Storm shelters typically are either connected to a standard home by being directly beneath it, thus needing to be set up prior to building the home, or the entrance can be located a few feet from the main entrance of the home for easy access. These steel bunkers can be made much larger than the pipes because more of them can easily be put together into one larger structure. Other types of underground shelters are fallout shelters and fortified homes.