ASME B30.1-2009 pdf download.Jacks, Industrial Rollers, Air Casters, and Hydraulic Gantries Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings.
service, severe: service that involves normal service cou- pled with abnormal rigging or operating conditions. service, special: service thatinvolves operation, other than normal or severe, which is approved by a qualified person. shall: indicates that the rule is mandatory and must be followed. should: indicates that the rule is a recommendation, the advisability of which depends on the facts in each situation. sideshift: lateral movementofasuspended load alongthe header beams of a telescopic hydraulic gantry system. stroke: linear extending or retracting movement of the hydraulic jack (Chapter 1-2) or gantry leg (Chapter 1-6). telescopic hydraulic gantry leg: a structural base that is supported on wheels or a frame and that has one or more vertical lift cylinders or boom. telescopic hydraulic gantry system: two or more telescopic hydraulic gantry legs, a hydraulic power unit, control console, hoses, and one or more header beams that span between the legs. travel: linear extending or retracting movement of the mechanical jack (Chapter 1-1); horizontal movement of the telescopic hydraulic gantry system along the track (Chapter 1-6). SECTION 1-0.3: REFERENCE Recommended Practices for Telescopic Hydraulic Gantry Systems Publisher: Specialized Carriers & Rigging Association, 2750 Prosperity Avenue, Suite 620, Fairfax, VA 22031- 4312 (www.scranet.org)
SECTION 1-1.1: TYPES AND DESIGN 1-1.1.1 Types (a) Types are screw and ratchet style (see Figs. 1-1.1.1-1 through 1-1.1.1-4) and are primarily used in a vertical position. (b) All jacks covered by this Chapter shall incorporate a positive stop or method to prevent over travel. (c) Mechanical jacks not covered by this Chapter should be used in accordance with recommendations of the manufacturer or a qualified person. 1-1.1.2 Design (a) The load-bearing materials in the jack shall have sufficient strength and ductility to raise, lower, and sup- port the rated load at the temperatures at which it will be used. (b) The jack shall be designed to meet the proof load requirements in para. 1-1.4.2(a). (c) The jack should be designed to ensure that the computed stress in the structural components of the jack does not exceed 50% of the yield strength of the material at the appropriate rated load for the components. (d) Control parts and accessory equipment shall be designed to provide a means of operation and adjust- ment that will minimize exposure of the operator to injury. (e) Carrying handles, if provided, shall be capable of statically supporting 200% of the weight of the jack. (f) Changes in physical properties caused by welding handles, eyes, or other approved attachments to a mechanical jack shall be taken into account. SECTION 1-1.2: DESIGN FACTOR The design factor for mechanical jacks shall be deter- mined by the manufacturer. SECTION 1-1.3: RATED LOADS Rated load shall be established by the mechanical jack manufacturer.
SECTION 1-1.6: EFFECTS OF ENVIRONMENT 1-1.6.1 Temperature When mechanical jacks are to be used at temperatures above 140°F (60°C) or below −20°F (−29°C), the jack manufacturer or a qualified person should be consulted. 1-1.6.2 Chemically Active Environments The strength and operation of mechanical jacks can be affected by chemically active environments such as caustic or acid substances or fumes. The jack manufac- turer or a qualified person should be consulted before mechanical jacks are used in chemically active environments. 1-1.6.3 Other Environments The internal workings of jacks can be affected by high moisture, gravel or sand, silt, grit, or other dust-laden air. Jacks subjectto these environments should have their inner components frequently cleaned, inspected, and lubricated. SECTION 1-1.7: INSTRUCTIONS AND TRAINING 1-1.7.1 Instructions The manufacturershallfurnishinformationaboutjack selection, inspection, maintenance, cautions to person- nel, effects of environment, and operating practices with each jack. 1-1.7.2 Training Mechanical jack users shall be trained in the selection, inspection, maintenance, cautions to personnel, effects of environment, and operating practices as covered by this Chapter and the manufacturer’s instructions. SECTION 1-1.8: INSPECTION, REPAIR, AND REMOVAL 1-1.8.1 Initial Inspection Prior to use, all new, altered, modified, or repaired mechanical jacks shall be inspected by a designated per- son to verify compliance with the applicable provisions of this Chapter. Written records are not required.