Not sure if anyone would know anything about this, my dad bought 4 lengths of 4.2 metre 190 x 35mm H3 treated pine from Mitre 10 to replace rotted structural beams on an outdoor deck.
3 of them seem fine, but one of the lengths has around 3-4 knot holes which are at least an inch in diameter, one of them is probably about 3.5cm, on the long edge of the timber.
He was wondering if it was okay to use, or if it shouldn't have been sold like this in the first place. I can't seem to find any Australian standards for this on the web.
Thank you for your help :)