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Size Posts and Laminate Beams

4:55
15:02
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Why patio roofs fail - and how to build them right!

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What happens here

Determine the appropriate size for your support posts; a 4x4 post may suffice for smaller spans, but a 6x6 is often necessary for larger overhangs or heavier loads, especially if required by local codes. To create a strong beam, laminate multiple pieces of lumber together by nailing them securely. When doing so, use only appropriate fasteners for pressure-treated lumber, such as 10D galvanized nails. Avoid using short hanger nails or random deck screws for structural connections, as they are not designed or tested to bear significant loads and can compromise the beam's integrity.

Goal: Construct adequately sized posts and strong laminated beams.

Tools and materials

  • 10D Galvanized Nails — Fastening laminated beam components (suitable for pressure-treated lumber)
  • Deck Screws — Demonstrating incorrect fasteners (should not be used for structural applications)
  • Lumber — Constructing posts and beams
  • Nail gun — Nailing together laminated beam components
  • Short Hanger Nails — Demonstrating incorrect fasteners (should not be used for this application)
  • Tape measure — Measuring lumber for posts and beams

What they say

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the difference. If your post isn't really tall, you can get away with a 4x4. In most cases, especially if you have a big overhang, you're going to want to use a 6x6. Now we'll laminate our beam. This beam length will be the same as your structure. These beams will often get laminated 12 or 16 in on center. Install your connector. Need to be sure you're using the proper fasteners. This is a 10D galvanized nail because this is pressure treated, you need to use galvanized. You just want to be sure you're not using the short hanger nails. While it might seem like this would work, you actually need to use these for this connector.

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