Frequently asked questions
Qualified people; specialist advice
- Height safety
- Rope access
- Confined space and rescue
There is a large variety of equipment that rope access technicians use in their rope access kit. Download our Rope Access Equipment List for an overview.
There you will find items that have become industry standards such as the Petzl ID Descender or the Petzl ASAP Lock through to as well as items that are less commonly used like the ISC D4 or the CT Sparrow.
If you are new to the Rope Access industry training in the correct use of this equipment and the techniques used are mandatory. Further information on our Rope Access training courses can be viewed on our website.
While the Rope Access Equipment List covers the basics it is no substitution for advice from specialist equipment suppliers. Contact Height Dynamics experienced sales team for more information.
To meet AS/NZS 1891.1 2007, which is the standard that fall arrest lanyards are manufactured to, a lanyard must have either integral energy absorbing properties or a personal energy absorber attached to it. The energy absorber is tested to ensure that the force to the anchor point (and user) is no more than 6kN.
Even when using the “restraint technique” to prevent a fall from heights Section 5.2 of the Code of Practise* states that the restraint system (anchor, lanyard and harness) must conform with AS/NZS 1891 Industrial Fall-arrest Systems And Devices series.*Download a copy of the Managing The Risk Of Falls At Workplaces Code Of Practice 2015 here
Before purchasing a fall arrest harness, understand that they are not all the same. A compliance level fall arrest harness will have limited or no extra features while a specialty harness will have unique features to meet specific applications or non-standard environments.
To assist with your choice consider the following questions
- What tasks do you need the harness to perform?
- How often will you be using your harness?
- Does the harness fit correctly?
- What extra features do you require your harness to have?
Simply put a fall arrest system will catch you if you fall, a fall restraint system will stop you from falling in the first place. The “restraint technique” still uses uses fall arrest rated equipment. However, it is used in a way that limits or restrains the user travelling to a position that free fall or fall arrest can occur.
Our article Fall Arrest vs Fall Restraint provides more information on using the "restraint technique"
A gas detector calibration is more thorough and confirms the accuracy of gas detection. Bump tests just check the sensor and alarm actually work.
A bump test doesn’t tell you anything about the accuracy of the gas detector’s performance, but it does give you confidence that it is working and is therefore suitable for use.
The gas detector calibration process involves testing the gas detector’s sensors against a known calibration standard (i.e. the contents of your bottle of calibration gas), and adjusting the gas detector to correct for any inaccuracies.
Calibration frequencies differ between gas detectors and the manufacturer’s recommendation should be heeded. Height Dynamics calibrate all leading brands. Contact our team if you need help.
Our frequently asked questions page attempts to provide answers to common questions our customers are faced with when working at height or in confined spaces.
Naturally, given that workers encounter many height safety scenarios, this list is not exhaustive.
So if your question isn’t answered here, get in touch and someone from our team of height safety specialists will be happy to help.