# anchoring a beam made from dimensional lumber to concrete piers

The rim joists of a shed will sit on two horizontal beams. The beams need to be secured to concrete piers with some kind of galvanized tie. Something like the one in the picture.

The beams will be created by flipping three (US nominal) 2x6 on edge and "laminating" them together, so to speak. A nominal 2x6 is approximately 1½ by 5½. So the beam is 4½ inches thick.

Are any such ties specifically designed to work with dimensional (2x) lumber, that is, such that the actual width of the tie is a multiple of ~1½ inches? If so, is there a term of art for such ties?

A tie with a 4" actual space, for example, is too small to accommodate three 2x6.

• I would go for taller horizontal beams, Either 2x8 or 2x10, double them up, add a shim into the galvanized tie by planing down a piece of wood or use plywood. I haven't done the load calculations for a 6x6 (your plan) versus 4x8 or 4x10 (my suggestion) but I would bet it will be more than sufficient. Apr 16, 2021 at 12:58
• Also, If your beam length is 8 feet or less then it would be trivial to buy plywood and sandwich it in between the 2x6 lumber to give you the thickness desired. Apr 16, 2021 at 13:02
• In my experience, every. single. one. of these is designed for 2-by dimensional lumber. If it's designed for one, it's got a 1.5" internal space, for two it has 3" internal space, for 3 it has 4.5" internal space. Don't know that I've ever seen one that is an actual internal dimension of 4" - a 4x4 post is 3.5", so that wouldn't work. Apr 16, 2021 at 13:27
• @Freeman: I was on tech support phone call earlier this morning with a major manufacturer of these anchors and they said just the opposite of what you stated. Me: "Are your 4" dimensions actual or nominal? Would three 2x6 flipped fit?" Tech support: "They're actual. Three 2x6 would not fit." Then I got a reply from another tech agent at the company in which he wrote that with their larger size, I would need a shim. Apr 16, 2021 at 15:45
• 4 feet deep? Sounds like there are frost-line requirements in your area. I'm not saying to ignore the engineer in any way, I'm just saying that I highly doubt they are forcing you to use 4 inch actual lumber. Apr 16, 2021 at 16:39