Hi Peter,
Thanks for your query. There’s some info on the installations instructions for Suncover/Laserlite here:
https://sunnyside.co.nz/wp-content/uploads/2015/10/SUNCOVER_LASERLITE_1000_Installation.pdf
For curved structures, the maximum purlin spacing should be 750mm and a minimum radius of 6000mm for the corrugated profile.
This basically means that if you have the sheet flat, you can raise the centre by:
3.6m sheet – 200mm
4.2m sheet – 400mm
4.8m sheet – 600mm
6.0m sheet – 800mm
Regards,
Kurt