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.
hydrogen bomb (aka thermonuclear weapon) why? it uses heat from a plutonium fission bomb to fuse molecules of deuterium and tritium. (1) intense head from fission explosion (2) deuterium and tritium overcome natural repulsion to each other -> fuse (3) fusion releases energy and neutrons - high energy neutrons cause fission in a uranium container