I gave myself tennis elbow drilling all the holes through the PFCs and brackets the previous month.
Installing the purlins aggravated this still further - so out of action for 10 days after an injection in to the elbow.
Spent the weekend chasing up second hand PFC (new $54 / m, second hand $15/m) and left Tony M to install bridging between the purlins
The structural engineer, Rusty at the hardware and Ross next door - all tell me that the bridging is unnecessary. It's probably costing me an extra $800 - but I would rather over engineer it.