1300 301 755

Sayfa is now Kattsafe

We’ve built a name for ourselves by continuously innovating safer, simpler height access and fall protection systems, and now it’s time for our business to evolve too.

Bringing everything we do under one new name makes it even simpler to work with us and use our products. And behind it all, we’re still the same team, quality products, and customer service that you’ve come to expect.

Fall distance clearance calculator

Required fall distance clearance for overhead mount systems

Fall distance clearance is the measurement which is calculated by totaling the distance that a person falls from the working surface to the position they end up in when their fall has been arrested. It also factors in a clearance distance to account for any stretch in the harness and lanyard.

Correct calculation ensures that the operator's fall arrest system will activate so they are not injured by coming into contact with any obstructions below.

  • RD: Required fall clearance

  • FF: Free fall

  • DD: Deceleration distance

  • C: Mandatory clearance

Use the calculator to determine the fall distance clearance and lanyard length that you must allow in your overhead mount installations.

The fall distance clearance required is dependent on the following factors:

  • Elevation of anchorage

  • Lanyard length

  • Lanyard elongation on deceleration pull out (personal energy absorber)

  • Operator height

  • Fall distance residual clearance (allowance for stretch in the lanyard and harness)

Important note:

Failure to provide the sufficient fall clearance distance for operators could result in serious injury or death should a fall at height occur.