1. ASME B30.20, Below-the-Hook Lifting Devices, American Society of Mechanical Engineers, New York, New York.
2. ASME BTH-1-2011, Design Of Below-the-Hook Lifting Devices, American Society of Mechanical Engineers, New York, NY.
3. WRC-537 (WRC-107), Local Stresses in Spherical and Cylindrical Shells Due to External Loads, Welding Research Council, New York, New York.
4. WRC-297, Supplement to Welding Research Council Bulletin 107, Welding Research Council, New York, New York.
5. ASME Section II Part D Pressure Vessel Code 2014, American Society of Mechanical Engineers, New York, NY.