Problems for checking special education on full harness fall arrest equipment

Problems for checking special education on full harness fall arrest equipment

1. Laws and regulations relating to safety belts have been revised, with those revisions coming into force on February 1, 2019. What are the three main points of this revision?

   　①

   　②

   　③

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2. In the old standards, the upper limit of impact load was ① _______ kN, regardless of type. In the new standards, this has been changed to ② _______ kN for the full harness type, and ③_______ kN for the body belt type.
   
   

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3. 1 kN corresponds to roughly _______ kg (strictly speaking, this is kgf because it is a unit of force).

   *1 N (Newton) is “a force producing an acceleration of 1 m/s2 (1 m/s every second) when applied to a 1 kg object”

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4. Safety belts based on the old standard shall not be used for work after _____ (year) _____ (month) _____ (day).

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5. Due to revision of laws and regulations, the full harness type must always be used, and the body belt type never used, at locations exceeding a height of ① _______ m.

   In the general construction industry, it is recommended that the full harness type be used at locations exceeding ② _______ m.

   The term “general construction industry” assumes the hook is attached to ③ _______ (statutory lower limit height 0.85 m), and does not apply to all construction work.

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6. 1.     What is the effect of a shock absorber?

   A._________________________________________________________________________
   
   

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7. 1.     ① Type ___ shock absorbers must not be used when attaching a hook at the worker’s feet. When using ② Type ___, the full harness type must be worn.

   
   

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8. 1.     The maximum fall distance, when the hook is attached to a scaffolding handrail, and a fall occurs while using a Type 2 shock absorber (and a 1.7 m lanyard), is calculated as:

   [① D-ring height = _______ m] – [② height where hook is attached _______ m] + lanyard length = 1.7 m + [③ maximum elongation of shock absorber _______ m] + [④ elongation of harness, etc. = _______ m] = [⑤ total = _______ m].

   
   

   Also, the maximum fall distance when using a body belt and Type 1 shock absorber under the same conditions (i.e., when attaching the hook to a scaffolding handrail) is ⑥　_______ m.

   
   

   *The fall distance always involves the height where the hook is attached and the height of the D-ring, and the free fall distance is given by the following formula:

   [lanyard length + (D-Ring height – hook height)]

   
   

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9. As guidelines, the Japan Safety Belt Research Association recommends replacing full harnesses ① ___ years after the start of use, and lanyards ② ___ years after the start of use.

   
   

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10. Points to beware of when using fall arrest equipment in your own company’s work

    (When selecting, mounting equipment, during use, etc.)