[Chapter 2] Section 3 ②

6. Attachment to a vertical main rope

1. When attaching the hook, etc. of fall arrest equipment to a vertical main rope, attach the hook, etc. to the mounting equipment installed on the main rope.

2. As a general rule, only one worker can use a single vertical rope.

3. Set so the position of mounting equipment installed on the vertical main rope does not go below the position of the ring connecting the lanyard and full harness, etc.

4. As far as possible, attach fall arrest equipment at a location that will prevent the worker from swinging like a pendulum and colliding with objects in case of a fall.

5. When using near the lower end of a vertical main rope made of long synthetic fiber rope, be careful to prevent contact with obstacles below because the main rope will stretch more when arresting a fall.

7. Attachment to a horizontal main rope

1. When there is no nearby structure for attaching the fall arrest equipment, and the work process involves lateral movement, or when it is necessary to move in the lateral direction frequently due to the nature of the work, a horizontal main rope shall be installed at a position higher than the ring connecting the lanyard and full harness, etc., and the hook, etc. of the fall arrest equipment shall be attached to it.
   When the main rope is installed at a low position due to the structure of the work place, take measures to reduce the fall distance such as using a short lanyard or a winding lanyard with lock function.

2. As a general rule, there should be only one worker using each span of the horizontal rope.

3. As far as possible, attach fall arrest equipment at a location that will prevent the worker from swinging like a pendulum and colliding with objects in case of a fall.

4. When using a synthetic fiber rope for the horizontal main rope, be careful to not let it come into contact with obstacles below or the ground when arresting a fall.

8. Other precautions

1. U-shaped suspension is strictly prohibited, except in the case of rope exclusively for work via work positioning.

   Lanyards for general work at high places must not be used for U-shaped suspension, whether the lanyard is the rope type or strap winding type.

   Strength and durability in the vertical direction are set so as to catch your body with a rope or strap if you fall, and thus it is dangerous to make such a lanyard into a U-shape and put your weight on it.

   

2. Do not allow the lanyard or hook of fall arrest equipment to hang down. Prevent them from catching on anything.

   When you are walking through a narrow passageway, etc., it is dangerous if the lanyard or hook of your fall arrest equipment gets caught on a structural or scaffolding member, causing you to trip.

   Unless you’re actually using the hook by attaching it, carry the rope, strap, and hook neatly stowed away in the storage pouch or winder, as shown in the illustration.

   

3. It is dangerous to run while wearing a strap winding lanyard with a lock function.

   A strap winding lanyard with a lock function functions in the same way as an automobile seat belt.

   If you take sudden actions such as running or jumping down, the lock will engage, so be careful.

   

4. Avoid contact with sparks or chemicals, etc.

   Ropes, straps, and belts are made of synthetic fibers such as nylon, and if they come into contact with flame, high heat, solvents, acids, alkalis, or other chemicals, they deteriorate and exhibit a marked decline in strength.

   Be careful not to allow any such contact.

   During welding work in particular, beware of deposition of sputter and slag.