This Standard is one of a series of safety standards on various subjects that have been formulated under the generalauspices ofthe AmericanNational Standards Institute. One purpose of the Standard is to serve as a guide to governmental authorities having jurisdiction over subjects within the scope of the Standard. It is expected, however, that the Standard will find a major application in industry, serving as a guide to manufac-turers, purchasers, and users of the equipment.
For the convenience of the user, the Standard has been divided into separate volumes.
