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A Safe Load Indicator (SLI) or an Automatic Safe Load Indicator (ASLI) is a device which is installed on mobile or portal cranes to alert the operator if the lift is exceeding the safe operating range of the machinery. [1] In some cases, the device will physically lock the machinery in circumstances it determines to be unsafe.
A proof test is a form of stress test to demonstrate the fitness of a load-bearing or impact-experiencing structure. An individual proof test may apply only to the unit tested, or to its design in general for mass-produced items. Such a structure is often subjected to loads above those expected in actual use, demonstrating safety and design margin.
It is good practice for all personnel using lifting equipment to conduct a pre-use inspection on all items. Regulation 9 of LOLER also outlines specific requirements for the formal inspection of lifting equipment at mandatory intervals. These inspections are to be performed by a competent person and the findings of the inspections recorded.
1971 – OSHA passes 29 CFR 1926.550, which is the standard for cranes and derricks used in construction for the next 41 years. [3] 1995 – The National Commission for the Certification of Crane Operators (NCCCO) is established by the crane and lifting industry as a nonprofit organization to develop a certification program for crane operators.
A crane's rated load is its Safe Working Load (SWL) and the design load (DL) is, (p 90) [1] = The dynamic lift factor for offshore cranes in the range 10 kN < SWL ≤ 2500 kN is not less than =.(p 84) [1] Thus for a crane with a SWL of 2000 kN (~200 tonne) its design load is not less than, = = The minimum breaking load (MBL) for the combined capacity of reeves of a steel wire hoisting rope ...
The Statnamic load test is a type of test for assessing the load-carrying capacity of deep foundations which is faster and less expensive than the static load test.The Statnamic test was conceived in 1985, with the first prototype tests carried out in 1988 through collaboration between Berminghammer Foundation Equipment of Canada and TNO Building Research of the Netherlands.