Have you guys ever seen the chain-link structures that some people use for dog runs and kennels? I've never thought to look closely at them, but I am wondering how the corners are joined to each other. Does anyone here know? The reason I ask is because I want to build something similar to enclose my tomato bed, but I don't want it permanently fixed into the ground. I have a wood frame at ground level that it will attach to. Does anyone make metal connectors that can be used with metal fencing or light weight steel poles?