Mechanical Safety

Hoisting Heavy Objects

Avoid walking areas under heavy objects being hoisted.

Hoisting operators must be trained and qualified.
Hoisting tools must be checked and complete.
Before hoisting, fasten all tools to fixed load-bearing objects or walls.
During hoisting, ensure that angles between lifting straps are under 90°, as shown in Figure 1.
Figure 1 Hoisting heavy objects

Ladder Usage

Before using a ladder:
- Check that it is intact and confirm its load bearing capacity. Do not overload it.
- A gradient of 75° is recommended between the ladder and the ground as measured with an angle square shown in Figure 2. Place the wider feet at the bottom or take protective measures to avoid skidding. Place the ladder on a stable surface.
  Figure 2 Ladder tilt angle
When climbing a ladder:
- Maintain your center of gravity within the ladder edges.
- Keep your body balanced when climbing.
- Do not climb higher than the fourth rung from the top.

To climb to a rooftop, ensure that the ladder has at least 1 m (3.28 ft.) extra height above the rooftop, as shown in Figure 3.

Figure 3 1 m (3.28 ft.) excess height of the ladder above the rooftop

Drilling Holes

Pay attention to the following safety precautions when drilling holes on the wall or ground.

Do not drill unauthorized holes on cabinets. Incorrectly drilled holes will damage cabinet electromagnetic shielding and internal cables. Metal scraps generated in drilling may also short circuit the cabinet boards.

Wear protective goggles and gloves when drilling.
Cover equipment before drilling to prevent metal scraps from entering the equipment interior. Remove these scraps immediately after drilling.

Transporting Heavy Objects

Adopt a load bearing posture before moving heavy objects to avoid sprains or other injuries. When transporting a cabinet, keep your back straight and avoid sudden movement.
When transporting equipment by hand, wear gloves to protect against sharp edges.
When moving or lifting a shelf, hold it by its handles or bottom edge instead of the handles of installed cabinet modules such as power modules, fan modules and boards.