Safety-Net Systems
Many times the nature and location of the work will dictate the form that fall protection takes. One of the three OSHA-required methods is the use of a safety net system.
Safety Net System
A safety net is a device used to "catch" a worker during a fall such that it mitigates the severity of the fall. When employers use safety nets, they must comply with the following provisions:
- Safety nets must be installed as close as practicable under the surface on which employees are working, but in no case more than 30 feet (9.1 m) below.
- When nets are used on bridges, the potential fall area must be unobstructed.
- Safety nets must extend outward from the outermost projection of the work surface. They must be a specific distance from the work surface. The nets must have a minimum horizontal distance from the edge of the working surface to the net's outer edge. Take a look at the table below:
| Distance Below Work Surface | Minimum Horizontal Distance |
|---|---|
| Up to 5 feet | 8 feet |
| 5 to 10 feet | 10 feet |
| More than 10 feet | 13 feet |
Safety Requirements for Nets
- Safety nets must be installed with sufficient clearance to prevent contact with the surface or structures under them when subjected to an impact force equal to the drop test described below.
- Safety nets and their installations must be capable of absorbing an impact force equal to the drop test described below.
- Safety nets and safety net installations must be drop-tested at the jobsite:
- after initial installation and before being used
- whenever relocated
- after major repair
- at 6-month intervals if left in one place
- The drop test consists of a 400 pound bag of sand 28-32 inches in diameter dropped into the net from the highest surface at which employees are exposed to fall hazards, but not from less than 42 inches above that level.
- When the employer can demonstrate that it is unreasonable to perform the drop-test described above, the employer or a designated competent person will certify that the net and net installation have sufficient clearance and impact absorption by preparing a certification record prior to the net being used as a fall protection system. The certification must include:
- identification of the net and net installation
- date that it was determined the net and net installation were in compliance
- signature of the person making the determination and certification
- The most recent certification record for each net and net installation must be available at the jobsite for inspection.
- Safety nets must be inspected for wear, damage, and other deterioration at least once a week, and after any occurrence which could affect the integrity of the system.
- Defective nets shall not be used, and defective components must be removed from service.
- Objects which have fallen into the safety net, such as scrap pieces, equipment, and tools, must be removed as soon as possible from the net and at least before the next work shift.
- Maximum mesh size must not exceed 6 inches by 6 inches. All mesh crossings must be secured to prevent enlargement of the mesh opening, which must be no longer than 6 inches, measured center-to-center.
- Each safety net, or section thereof, must have a border rope for webbing with a minimum breaking strength of 5,000 pounds.
- Connections between safety net panels must be as strong as integral net components, and must not be spaced more than 6 inches apart.
Knowledge Check Choose the best answer for the question.
6-4. What is the maximum distance safety nets may be installed under the work surface?
You forgot to answer the question!