ANSI ASSP A10.16 pdf free download

ANSI ASSP A10.16 pdf free download.Construction and Demolition Operations Safety Requirements for Tunnels, Shafts and Caissons.
3. DEFINITIONS
3.1 Air Supply. Compressed air used in the working chamber.
3.1.1 Low-Air Supply. Compressed air used to raise and maintain pressure in the working chamber and in the air locks.
3.1.2 High-Air Supply. Compressed air normally used to activate pneumatic equipment and tools.
3.2 Barricade. An obstruction or barrier to deter the passage of persons or vehicles.
3.3 Blow. A rapid loss of air pressure, which may be caused by a breach of the surface areas in a tunnel being constructed under compressed air conditions. A blow may, or may not, involve a reverse flow of solid or liquid materials (flooding of a tunnel under water, etc).
3.4 Bulkhead. An airtight vertical wall or partition separating the working chamber from free air or from another chamber under a lesser pressure than the working pressure. Generally, one or more air locks pierce the bulkhead, in addition to a number of openings for air pipes and other facilities.
3.5 Caisson. A watertight chamber, usually of wood or steel sheeting, sometimes a cylinder of steel or concrete, used in construction work underwater or as a foundation. When the bottom of the structure extends below the surface of free water and excavation is performed by workers in a working chamber at an air pressure greater than atmospheric pressure, the caisson is said to be a compressed-air caisson.
3.6 Competent Person. One who is capable of identifying existing and predictable hazards in the surroundings or working conditions that are unsanitary, hazardous or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them.
3.7 Decanting. A method of decompression under emergency conditions requiring recompression in a second and separate lock.
3.8 Engineer. A person qualified by training and experience in a branch of engineering and registered in the state where the work is to be performed.
3.9 Engineering. The profession in which a knowledge of the mathematical and physical sciences gained by study, experience and practice is applied with judgment to develop ways to economically utilize the materials and forces of nature for the progressive well-being of mankind.
3.10 Escape Respirator. A mouthpiece respirator designed for self-rescue in case of a fire or explosion.
3.11 Face. The area of farthest advance of the tunnel excavation in which the major excavation process is taking place. Synonymous with Working Face.
3.12 Free Air. Air at normal atmospheric pressure.
3.13 Heading. The portion of a tunnel where major work of excavating and initial lining is taking place, or the portion immediately behind a working face.
3.14.3 Long Lock. A lock designed to provide greater comfort for workers being discharged from the working chamber when the total time of decompression exceeds 75 minutes.
3.14.4 Man Lock. A lock through which only workers may pass. Synonymous with Person Lock.
3.14.5 Material Lock. A lock designed for and primarily used for the passage of materials and equipment. 3.14.6 Medical Lock. A special lock in which workers suffering from decom- pression ilness may be placed for medical attention and treatment. The medical lock may also be used for pre-employment physical examinations to determine the adaptability of prospective employee(s) to changes in pressure. 3.14.7 Working Man Lock. A personnel lock, combination lock or long lock that is normally used by personnel for entering or leaving the working chamber. Synonymous with Working Person Lock.
ANSI ASSP A10.16  pdf download.