Construction safety nets are essential pieces of equipment for the safe operation of a building site. They are designed to catch falling equipment, debris or workers. They also have to be strong enough to catch all three at the same time. They protect employees – those working at height and those below – and they also protect members of the public.
A fall from a height is likely to result in a serious injury. By installing safety nets below a high-level work area, there is less likelihood that the person will be injured if they fall.
Regardless of the time spent on a roof, the risk of falling is high. Any fall is likely to result in a serious injury. Safety nets installed below a high-level work area reduce the distance that a worker can fall. They absorb the impact of the fall and provide a ‘soft landing’ to reduce the likelihood of a person being injured.
Safety nets are collective fall arrest systems, not fall restraint systems. That is, they provide passive protection from falls while allowing people to work at height without restricting their movement.
ANCHORAGE DEVICE (SAFETY NETS)
A device or system used to connect a safety net to the structure. May include tie ropes, karabiners or other attachment devices.
A fixing on the structure that the safety net is attached to.
A rope that passes through each mesh around the net’s perimeter and determines the net’s overall dimensions.
The horizontal distance from the edge of a work platform to the outer edge of the safety net.
The calculated maximum load that an anchor point is designed to carry.
The safety net classification based on the mesh size and energy absorption capacity.
The distance below the net that must be kept clear of objects that a falling person might otherwise strike as the safety net deflects under their impact.
A person who has acquired through a combination of training and qualifications or experience, the knowledge and skills to correctly perform the required task.
The rope that joins two safety nets together.
A rigging technique to prevent wasting at the unsupported perimeter of a safety net.
Types of Safety Nets
Types of Safety Net Installation for Building Construction
Safety nets are used in modern construction industry extensively as effective, inexpensive device to provide personnel fall safety and a debris containment. Although available in a variety of materials and designs, safety nets installed in construction sites are mostly differentiated in two types – horizontal and vertical, serving different roles in a construction site.
Vertical safety nets
The vertical safety net is easily recognizable due to its green coloring and high visibility on any ongoing construction. Vertical safety netting is installed to provide a passive protection for personnel working in the building, often installed on ledges doubling as a guardrail system, as well as protecting pedestrians or personnel below from any debris, tools, or materials falling off the building. Advantages of a vertical safety netting includes ease of installation, removal, relocation, and storage, cutting down on preparation time and results in greater productivity. It is also a cost-effective option for debris containment.
Horizontal safety nets
The horizontal safety net is also known as perimeter debris netting, and are installed in construction sites to catch items and personnel already fallen off instead of prevent falling, usually at great heights. Items usually include bricks, concrete blocks, hand tools, in addition to general debris. Advantages of a horizontal safety netting includes being heavy duty grade due to the speed and weight of things and people needed to be caught, as well as ease of being moved upwards as construction progresses.
Do’s and Don’t
- Do not keep in long term exposure to UV rays
- Do not expose to any sharp object
- Do not expose to heat from welding, grinding or burning
- Keep protected from strong winds and extreme weather conditions
- Do not apply more load or impact
- do not drag nets across the ground
- avoid contact with sharp edges.
- stack material onto the net
- let debris accumulate in the net
- allow people to jump or throw objects into the net.