Here in western Oklahoma , concern of wildlife falling into steel and fiberglass watering tanks. 2 rails with expanded metal between the rails that small critters and birds can easily crawl out on. Maybe, and I'm not on site, but maybe get idea's going. 3 2x4's in parallel , max 32"'s edge to edge with one in center , tie all 3 together with expanded metal , then cover with old used carpet ? Build 4 of them, one for each side ? Possibility ?
