Direct access is acceptable when the scaffold is not more than 14 inches (36 centimeters) horizontally and not more than 24 inches (61centimeters) vertically from the other surfaces. 1926.451(e)(8) The standard prohibits the use of crossbraces as a means of access.
H Bomb. Abbreviation for Hydrogen Bomb. The hydrogen bomb is the big brother of the first nuclear bombs, Fat Man and Little Boy, which were dropped on Nagasaki and Heroshima in 1945. The hydrogen bomb uses a hydrogen neutron, fired at high speed, into an atom of some unstable element, usually uranium.
All nuclear weapons require a nuclear fission reaction to work, but pure fission bombs, those that use a fission reaction alone, are known as atomic, or atom, bombs. Atom bombs were first tested in New Mexico in 1945, during the height of World War II.