I'm planning a low-profile deck, about 18" from surface to grade. I've seen plans that involve setting beams directly in anchors set into the concrete footings. However, I can't find any anchors that would work... only ones I find are post anchors meant for a 4x4 (3.5 nominal) so a doubled 2x10 beam (total 3" nominal) wouldn't be a snug fit into the anchor. Are there anchors made specifically to set into the footings, then take a doubled 2x? beam? Anyone know where I can find that?