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.

concrete anchor

  • 1
    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. – MonkeyZeus Apr 16 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. – MonkeyZeus Apr 16 at 13:02
  • 3
    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. – FreeMan Apr 16 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. – mr blint Apr 16 at 15:45
  • Weird. I've gotten mine from the local big-box (never dealt directly with the factory) and have never had an issue. I guess you'll be buying some sheets of 1/2" PT plywood and ripping it into shims. Or, look at a different manufacturer. – FreeMan Apr 16 at 15:47

I think this is what you need. Check with the representative from Simpson for availability and what size (W) you need. You can filter the desirable size from the table below.

enter image description here enter image description here

  • The chart highlights the very question I asked about 2x dimensional lumber compatibility. The "W" dimension is not a multiple of 1-1/2, to make it perfectly suited to dimensional 2x lumber. These are post ties that are being repurposed as beam anchors. The ABW66Z at 5-1/2" is probably the best bet for a triple 2x6 beam, but there would be about an inch of space to be shimmed. – mr blint Apr 17 at 11:20
  • @mr blint I don't know why you need to sit the beam directly on the concrete pier. You shall consider attaching your beam to a post, then connect the post using the post connector as shown. Otherwise, you might have to make your own connector then. – r13 Apr 17 at 11:57
  • A number of things, but mainly height of the building.When a shed is set closer than 10' from property line here, the max height is 11 feet. I wanted to use cedar shingles at standard exposure, so minimum pitch is 4 in 12. I have to solve the problem in a manner that the local inspector would approve, so there has to be published load specs. – mr blint Apr 17 at 12:48
  • @mr blink If the concrete pier hasn't poured yet, you might consider embed a short piece of wood post and connect the beam to it with standard connectors. – r13 Apr 17 at 13:14

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.