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Safety & Lifesaving
Fall Protection Systems
Fall Protection Systems covers full body harnesses, lanyards and energy absorbers, self-retracting lifelines, connectors, anchor devices, and fixed ladder and rail systems on derricks, masts and cranes.
Each piece is one link in an arrest system, and the weakest link sets its rating. Fixed rails and anchors can be inspected and reused. Textiles and retractables need a known history.
How a fall arrest system works
A fall arrest system has three parts: an anchor, a connecting subsystem and a full body harness. When a worker falls, the energy absorber or the braking mechanism of a self-retracting lifeline limits the force on the body while the system stops the fall. The total fall clearance is the free fall, plus the deceleration distance, plus the harness stretch and the worker's height below the D-ring, plus a safety margin. On a drill floor or a derrick platform that clearance is often short, which favours retractables over long lanyards.
Configurations
| Component | European standard | ANSI standard |
|---|---|---|
| Full body harness | EN 361 | ANSI/ASSP Z359.11 |
| Connectors and karabiners | EN 362 | ANSI/ASSP Z359.12 |
| Energy-absorbing lanyard | EN 355 | ANSI/ASSP Z359.13 |
| Self-retracting lifeline | EN 360 | ANSI/ASSP Z359.14 |
| Rigid anchor line (ladder rail) | EN 353-1 | ANSI/ASSP Z359.16 |
| Anchor devices | EN 795 | ANSI/ASSP Z359.18 |
| Rescue lifting device | EN 1496 | ANSI/ASSP Z359.4 |
Derrick ladders usually carry a rigid rail or a cable with a guided arrester. Derrickmen at the monkeyboard wear a harness tied off to a rated anchor, often with a retractable. Self-retracting lifelines for use where the line passes over an edge must be rated for leading-edge use, such as an SRL-LE under ANSI Z359.14.
Key specifications
| Parameter | Why it matters | Typical classes or units |
|---|---|---|
| User capacity | Harness and absorber must cover the worker plus tools | kg and lb, stated range |
| Arrest force | Limit on the body during a fall | EN 355 caps it at 6 kN; OSHA at 8 kN (1,800 lbf) |
| Gate strength | Resists side loading of the connector | kN or lbf, marked on the gate |
| Anchor strength | Must hold the arrest load | OSHA requires 5,000 lbf (22.2 kN) per person or a designed safety factor of two |
| Fall clearance | Must fit the space below | m and ft from the maker's chart |
Standards and inspection rules
EN 365 requires a periodic examination by a competent person at least every 12 months, following the maker's instructions. ANSI Z359.2 sets the requirements for a managed fall protection programme, including inspection and rescue planning. OSHA 29 CFR 1910.140 sets the US workplace rules for personal fall protection systems. Many makers of self-retracting lifelines also require service or recertification at their own authorised centres at set intervals.
Failure modes and inspection
- Webbing. Look for cuts, abrasion, burns, chemical staining, ultraviolet fading and broken stitching. Check the fall indicator on the harness and lanyard.
- Energy absorbers. Any deployment, even partial, takes the item out of service.
- Metal parts. Check for corrosion, distortion, cracks, worn gates and gates that do not self-close and lock.
- Self-retracting lifelines. Check that the line retracts fully, locks on a sharp pull, and that the impact indicator has not tripped.
- Rails and anchors. Check welds, fasteners and corrosion on the structure and the rail joints.
Equipment that has arrested a fall must be withdrawn and destroyed or returned to the maker, as each maker's instructions require.
Documentation
- Marking with standard, maker, model, serial or batch number and date of manufacture.
- Instructions for use and the declaration of conformity.
- Periodic examination records for every serial number in use.
- For fixed rails and anchors, the design calculation, installation record and load test certificate.
Integration
Every connector in the chain must suit the anchor and the harness attachment it clips to. A large scaffold hook may roll out of a small D-ring. Anchors on rig structure need a qualified engineer's approval for the arrest load. The rescue plan matters as much as the arrest, so pair each work-at-height task with a rescue kit and a trained team.
Refurbishment, recertification and what never to buy used
Fixed rails, anchor posts and davit-based anchors can return to service after a structural inspection and a load test. Retractables can be serviced only by the maker or an authorised centre. Never buy used harnesses, lanyards, energy absorbers or rope grabs. Unused surplus is fine if it is sealed, in date by the maker's stated life and marked to a standard your installation accepts. Naventr can arrange an independent inspection of fixed systems on request.
For rescue stretchers and lifting kit, see emergency response equipment.
FAQ
Frequently asked questions
How often must fall protection equipment be inspected?
A competent person must examine it at least every 12 months under EN 365, and the user must check it before each use. Some makers set shorter intervals for retractables and require service at their own centres. Record every examination by serial number.
Can a used harness be recertified?
A harness with a complete examination record can stay in service after its periodic examination, but buying one second-hand is a poor risk. Damage from a fall or chemicals may not show. Buy harnesses unused and in date.
What fall clearance does a self-retracting lifeline need?
Less than an energy-absorbing lanyard, because it locks within a short distance. The exact figure comes from the maker's clearance chart for that model and anchor position. Leading-edge use needs a leading-edge rated device.
What does EN 360 cover?
EN 360 covers retractable type fall arresters, the European equivalent of self-retracting lifelines under ANSI Z359.14. It sets requirements for locking, arrest force and dynamic performance. For use where the line runs over an edge, buy a device the maker has tested and marked for edge use.
What should I check on a used derrick ladder fall arrest rail?
Check the rail joints, brackets and fasteners for corrosion and loss of section first. Then confirm the guided arrester is compatible with that rail and marked to EN 353-1 or the equivalent. Ask for the installation and load test records.
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