We have a couple of products that will help you with this. A metal raspberry protection and support system that can also be used with netting to protect the fruit from the birds.
We also have a timber wire frame support. This is the one we use at the Kitchen Garden, and the photo on the website is taken at the garden. This system has been in place for a number of years and is still strong and sturdy.
Either of these will give you years of worry free raspberry support. Given that you have double rows of canes, the metal system may suit you better as it is a wider design.
I hope this is helpful to you. If I can be of any further help, please don’t hesitate to contact me.