Below The Hook Lifting Devices Design

A volume of the overall safety standard for cableways cranes derricks hoists hooks jacks and slings asme b30 20 2018.

Below the hook lifting devices design.

B30 20 below the hook lifting devices was first published in 1985 new editions were published in 1993 1999 2003 and 2006. Design category b as defined by asme bth 1 should be designated when the magnitude and variation of loads applied to the lifter are not predictable and where loading and environmental conditions are severe or not accurately defined. B30 20 includes provisions that apply to the marking construction installation inspection testing maintenance and operation of below the hook lifting devices. The following requirements apply to below the hook lifting devices such as spreader bars lifting yokes lifting baskets and lift fixtures.

The asme bth 1 standard for the design of below the hook lifting devices has been revised. 2 1 1 structural and mechanical lifting devices. In the 2010 edition maintenance was made mandatory definitions. The desire to build up the very same pursuit that results in buildings ranging from multi story.

The construction industry recognizes the necessity for inspections of below the hook lifting devices. Along with stress buckling is also a critical factor in lifting beams that must be addressed in detail to ensure that the. This is the most common design category with most below the hook lifting devices falling under design category b. The new edition released as asme bth 1 2017 design of below the hook lifting devices updates and supersedes the 2014 version of the standard continuing to serve as a guide for designers manufacturers purchasers and users of below the hook lifting devices.

2 1 1 1 marking the rated capacity of each lifting device must be marked on the main structure where it is visible and legible. Bth 1 addresses only design requirements. Lifting devices designed to this standard shall comply with asme b30 20 below the hook lifting devices. Below the hook lifting devices are most often mechanical but can also be operated electronically hydraulically or pneumatically as well with special controls engineered into the design of the product to operate claws tongs hooks or latches.

An employer who follows asme b 30 20 specifically sections 20 1 3 1 through 20 1 3 7 and 20 1 3 9 with respect to inspections for below the hook lifting devices other than for slings would be considered to be in compliance with osha.