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This is my first post here. I am in the process of building a privacy fence, arbor and trellis around our small backyard pool/spa. We have prevailing winds from the North and would like to put up a wind break on that side. We found 30 sheets of tempered solar glass approx. 30 x 82 on Craigslist. Here is my challenge. One side of this fence will be a straight run that is little over 20 feet long. My wife really wants a trellis on top of it. There is no perpendicular support in that 20 feet to prevent racking. This makes me very nervous to stop in tempered glass in a structure that is less than solid. Does anybody have any suggestions as to how to pick up some support on a wall like this. One thing that I have considered is constructing some type of a decorative truss beam that would span the 20 feet from the intersecting wall and building. This would provide a second support for the trellis and could stabilize it quite a bit. As far as vertical support, the wall will be on slab. I could go off slab and bury some 4x4's, but there is a propane line very close to where they would be buried and I am not fond of hitting a gas line with a shovel.....
Any thoughts or suggestions? Does anybody have any creative ideas for a DIY decorative truss beam? Obviously the load factor would be minimal.