[Chapter 1] Section 1 ③

2. Methods of inspection and maintenance of equipment used for work

1. Mounting equipment for fall arrest equipment, and inspection and maintenance

Even if a worker has fall arrest equipment, it will be useless if it is not used at a place where there is a risk of falling. Also, if it is used, it is meaningless if the equipment it is mounted to is imperfect, or there is no place to mount it to in the first place.

Therefore, before use, be sure to check whether any mounting equipment exists, whether it has any problems, and so on.

[Reference: Fall accidents while using a safety belt (From 2010 to 2014)]

Total 170 (Only reports from workplaces in the construction industry were extracted based on the Report on Worker Death, Injury and Illness.)

(1) Cases of collision with a beam, etc. while dangling or falling 17

① Collision at locations other than the ground, etc. 15

② Prolonged compression by the safety belt 1

③ Impact load on body via the safety belt 1

(2) Cases where a person wearing a safety belt collided with the ground, etc. 16

① Wide installation spacing between main rope supports 1

② Insufficient tension on main rope 2

③ Long lanyard 3

④ Low working floor
　 (for main rope, less than 4m; for other, less than 2m) 10

(3) Cases where the hook came off, etc. resulting in collision with the ground, etc. 137

① Main rope broke or came off 10

② Lanyard broke 5

③ Handrail, etc. where hook was attached came off due to improper fastening, etc. 25

④ Hook attached at an unsuitable place came off 64

⑤ Safety belt came off 10

⑥ The entire scaffolding, etc., where the hook was attached collapsed. 20

⑦ Unknown 3

(Source: Data from the Third Review Meeting on Proper Regulation of Personal Protective Equipment for Fall Prevention)

※Regardless of whether there is an accident, it is illegal to have workers work at a high place (i.e., work at a height of 2 m or more where there is a risk of falling/tumbling) without any mounting equipment for fall arrest equipment, or with mounting equipment that is defective or inadequate.
Even if a worker voluntarily carries out dangerous work on his/her own initiative, saying “it’s okay,” this does not lessen at all the responsibility of the employer (company) “to ensure that workers work under safe conditions.”
In addition, there are many cases in which a supervisor (i.e., foreman) entrusted by the employer (company) to direct and supervise work at the site, is also held responsible.

[Examples of the concept of responsibility for mounting equipment under the Industrial Safety and Health Act]

Not having installation equipment in the first place is the responsibility of the employer (company, representative).

Example) Although it was a work site where a main rope should be provided, the company did not have such equipment, so the workers were made to work without a place to attach a hook.
If mounting equipment is available, but workers are made to work without installing it, it is the responsibility of the site supervisor.

Example) Main rope equipment was loaded in the construction vehicle, but the work was only expected to take a short time, so installation was judged to be unnecessary, and workers were made to work without installing it.
If mounting equipment is available, but defective, it is the responsibility of the employer or site supervisor.

Example) Workers were made to use a main rope which was deteriorated and damaged due to neglect of inspection. When the worker tumbled, the main rope broke and the worker collided into the ground.
(The company is likely responsible for inadequacies of the inspection system and guidance/education, encouraging the use of defective equipment, and so forth; and the site supervisor and person in charge of inspection are likely responsible, from a practical standpoint, for neglecting inspection, etc.)

Note)
The above is a rough guideline for judgment, and among actual examples sent to a prosecutor for violation of the Industrial Safety and Health Act, there are various cases depending on the individual situation.

The Industrial Safety and Health Act was drafted with emphasis mainly on the responsibility of employers, but when an accident actually occurs, it is the workers themselves who face dire consequences, so it is natural for them to carefully check the equipment they rely on for protection, and strive to work safely even without instructions from supervisors.

2. Inspection items for mounting equipment, etc. and examples of disposal criteria (See the table below)

To ensure safe use, be sure to inspect before starting work.

If inspection shows that equipment meets the disposal criteria, do not use it. Replace it with new equipment.

Part name	Inspection item	Disposal criteria
Main rope, subrope	Damage	7 or more rope yarns broken

	Wear	Conspicuous wear

	Deformation	Deformation (twisted hump).

	Looseness or coming apart of Satsuma knit	Satsuma-knit that is loose or coming apart

	Deposition of chemicals or paints	Deposition of chemicals or adhesion and hardening of paint

	Deformation, etc. of thimble	Thimble deformed or missing
Tensioner	Quality of lengthening/shortening function	・Difficulty lengthening/shortening ・Damaged or missing spring ・Poor function

	Spring breakage	Broken or missing, and incapable of holding

	Claw wear	Reduction by 1/2 or more in bumps on claw edge

	Rust	Overall rust

	Deformation	Deformation visible to the eye

	Damage	Gouging of 1 mm or more in depth, or fine fissures

	Rivet wear or rattle	・Worn rivet heads or crimped parts (worn by about 1/2) ・Rattling rivets
Hook fitting	Abnormal function	・Failure of safety device or latch to operate reliably ・Damaged or missing spring

	Deformation	Deformation visible to the eye

	Damage	・Gouging of 1 mm or more in depth ・Fine fissures

	Rust	Overall rust

	(Carabiner)corrosion	White rust (corrosion)

	Rivet wear or rattle	・Worn rivet heads or crimped parts (worn by about 1/2) ・Rattling rivets
Safety block	Quality of lock function	Strap that does not wind or unwind smoothly

	Quality of strap winding/unwinding	Strap that does not wind or unwind smoothly

	Splitting or deformation of body	Splitting of length 3 mm or more in the body or deformation visible to the eye

	Deposition of chemicals or paint on strap	Core material exposed due to damage, burning, abrasion, etc.

	Deposition of chemicals or paint on strap	Twisting, or deformation and waviness over entire length

	Breaking of sewing	Sewing thread broken at one or more places

Length adjuster	Quality of lengthening/shortening function	Difficulty lengthening/shortening

	Damaged or missing spring	Poor function

	Spring breakage	Broken or missing, and incapable of holding

	Claw wear	Reduction by 1/2 or more in bumps on claw edge

Length adjuster Carabiner Ring	Rust	Overall rust

	Deformation	Deformation visible to the eye

	Damage	Gouging of 1 mm or more in depth, or fine fissures

	Rivet wear or rattle	・Worn rivet heads or crimped parts (worn by about 1/2) ・Rattling rivets

Slide (Grip for vertical main rope)	Quality of mounting to vertical main rope	Cannot be mounted to vertical main rope due to spring damage, etc.

	Deformation, damage	・Defective operation (safety device or lock device do not completely close) ・Deformation visible to the eye

	Confirmation of stop function	・When the hook is lifted, and the slide is allowed to drop freely, the distance to stopping is 30 cm or more ・Fails to stop when hook is pulled downward