Article

Why won’t my previously certified ROPS pass today?

More and more, we are having conversations with clients about why a previously certified ROPS frame is no longer compliant. Typically, ROPS are certified for 5 years, and now those that were certified pre-2011 aren’t quite cutting the mustard. Here is the story of why, in a brief history lesson.

In 1999, the Accepted Code of Practise (ACOP) OPS referenced ISO standards for Earth Moving Machinery (ISO 3471), Hydraulic Excavators less than 6t (ISO 12117-1) and Forestry Machinery (ISO 8082-1). Engineers used these standards as the basis for their design of FOPS, OPS, ROPS and TOPS. As new work practises emerged, the then Department of Labour become concerned about the level of engineering design practises and approached IPENZ to encourage a greater level of design procedure robustness. IPENZ issued a practise note PN12 V1 in 2008, calling on its members to practise an increased level of rigour when designing frames to the ACOP (1999) OPS. Effectively what this meant was a change in the level of analysis being applied to the frames.

Post 2008, the Forestry standard was beefed up and in 2011, ISO 8082-2 was introduced referencing new requirements for excavators used in forestry. This moved the goalpost again for the engineer designing the frame in terms of the specific areas of analysis he/she had to undertake to meet compliance. And for owners, what was previously acceptable may not be have been up to scratch anymore.

Now that we are at a point in time where pre-2011 ROPS are up for re-certification, owners could be a little bit shocked that the recertification process isn’t as straightforward. Essentially, over time the requirements have increased to ensure a ROPS frame is more compliant, and our team of engineers can work with you to bring your equipment up to standard.