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.
On 6 August 1945, at 08:15, the first bomb was dropped on the centre of Hiroshima. âLittle Boyâ was a gun-type fission bomb, using a conventional explosive charge to fire one sub-critical mass of uranium into another. This kind of device had never been tested before, but the scientists were confident it would work.