How do you have it secured? You almost have to secure it on both sides and the top otherwise it will tear when the weight of the produce it's holding up really starts to climb. I had a similar problem last year and that was my solution.

One day it's fine if a little saggy the next day after a rain the plants tore it to pieces; because of all the extra weight of the rain and the plants uptaking a bunch of water.

It was secured properly. The nylon fibers just seemed to disintegrate starting in the middle...which I thought was odd. I still have one intact trellis which is currently holding the sugar snap peas that the neighbor boys planted.
I did notice that the netting is a bit thicker on that one.

I didn't keep the packaging but I suspect that the 3 bags of netting I bought this year were slightly thinner than the bag I bought last year. Just wanted to offer a heads up for those using the prepackaged netting that it isn't entirely indestructible.

My husband is going to rework the wooden frames he made with a thicker nylon cord next year, which will probably be a good improvement as I plan to try growing some rather heavy squash and another round of all-over-the-place cherry tomatoes

I'm giving up on the nylon netting and just going to get some cattle panels.

Like jeremy I bought a cattle panel and made an arbor I used this year. It's Way better than the stretchy nylon I used last year. I even had melons hanging off it I just tied a spider on the fruit to support them.

Curt

In previous years the nylon netting was nearly indestructible.

The netting many places sold this year (including Burpee if that's what you had) was utter crap.

There has been many complaints about it, and myself I lost a ton of trellis'd crops that I"ve never had problems trellissing before.