I use these for an archway over some steps with vines growing on it. They work really well, are sturdy and can really take the wind. Gonna use them this year for my tomatoes in the garden and horizontally for my raspberries, cucumbers, and peas.
Here's a great way to make your own trellis. This trellis is a great way to extend your gardening space. Grow your vegetables vertically. This trellis is easy to make and folds for easy winter storage. IN A RAISED BED
"Even better idea for a cucumber Trellis. This way i can make use of the sides of the beds I've already built" (and do this for melons too - use old stockings to put them in a sling if they get really big.
A Tiny Homestead: Building a permanent greenhouse with cattle panels - part 1 These can be attractive. Some even use it as a trellis for pretty vines! (And did I mention inexpensive in compariison toother greenhouses of this size?