Fall height
The fall height is measured from the level where people work to the level of the net. EN 1263-2 sets a maximum of 6 m for falls into the main area of the net, and a lower limit where a person could land close to the border rope, near the edge of the net. Higher falls put more energy into the net, increase the deflection and increase the risk of injury.
The rule of thumb on site is simple: install the net as close as possible below the work. On steel structures and roofs, nets are often fixed just below the level of the beams or purlins.
Catching width
People rarely fall straight down. A person who slips off an edge may move outwards as they fall. The net must therefore extend beyond the edge of the working area. EN 1263-2 links the minimum catching width to the fall height:
| Fall height up to | Minimum catching width (indicative) |
|---|---|
| 1 m | 2.0 m |
| 3 m | 2.5 m |
| 6 m | 3.0 m |
These values matter especially for System T bracket nets at slab edges, where the net width is the catching width.
Anchor points
The net transfers the energy of a fall through its border rope to the anchors. EN 1263-2 gives the maximum spacing between anchors (2.5 m is the usual figure for System S nets) and the loads they must withstand (a characteristic load of 6 kN is commonly used for anchor design). Anchors on steel are typically slings or clamps; on concrete, cast-in or drilled anchors. A competent person must confirm that each anchor point can take the load.
Clearance below the net
When a net catches a person it deflects downwards. The deflection depends on the net size, the initial sag, the fall height and the weight of the person. The space below the net must be free of beams, equipment, scaffolding and stored materials for the full deflection. When planning, take the deflection data from the manufacturer for the net size and fall height, and add a margin.
Planning checklist
- Mark the working levels and the possible fall points on the drawings.
- Choose the net level so the fall height is as small as possible and within 6 m.
- Check the catching width at every edge.
- Mark anchor points at the required spacing and confirm their capacity.
- Check the clearance below the net for the expected deflection.
- Plan how nets are joined and how gaps to the structure are closed.
- Plan access for installation, inspection and removal of debris.
The figures in this article summarise EN 1263-2 for orientation. Check the current edition of the standard and the installation instructions for your nets. The complete safety net guide covers the whole process.
Frequently asked questions
What is the maximum fall height into a safety net?
6 m under EN 1263-2, and less near the edge of the net. In practice, keep the net as close below the working level as possible.
Why does a lower fall height matter?
A shorter fall means less energy, lower forces on the body and less deflection of the net, so less clearance is needed below.
What happens if the clearance below the net is too small?
The person may hit the obstacle below as the net deflects. Keep the space below free and never store materials under a net.