The NZTA M1-A 2019 specification has now been in circulation for over a year. As discussed in my previous article, this specification moves away from the old penetration grading to a performance based specification. It is quite a significant shift and requires a bit of understanding to get to grips with the new system for grading and naming binders. If you haven’t yet viewed that article it’s a good place to start to get a general overview of the new specification, which you can find here.
To read the full article please click here.
