How to Connect a Notched Wood Post to a Beam
Using a notched post and beam connection will lock the beam in place, secure it from rotating and resist wind uplift. Notching a post does not weaken the structural integrity of the wood support post because the load for the deck is transferred down through the post to the footings. The upright notched section of the post acts stabilizes the beam. Most deck builders use a reciprocating saw to cut an L shaped seat in the top of the post large enough to hold the beam. Another building method to consider if you don’t have a reciprocating saw involves using circular saw to score the top of the post to remove the weakened sections with a chisel. A 2-2x10 beam will require a notch 3” wide by 9-1/4 inches tall. To hold the beam in place you will then need to predrill and run two ½” threaded carriage bolts through the beam and the top of the notch.
SaveMeasure and mark the section of each 6x6 support post one at a time to cut away for the beam pocket.
SaveUse a circular saw at its lowest cut depth to cut out the post notch. The circular saw will not finish the cut with 2 passes.
SaveUse a reciprocating or hand saw to remove the shoulder notch and clean up any rough edges.
SaveApply a coat of copper naphthenate to all cut ends of the pressure treated 6x6 to prevent decay. Attach the post to your footing using a post beam connector.
SaveSet your beam into the notched pocket and drill pilot holes for your through bolts set 2" from the top and bottom of the beam.
SaveHammer your through bolts through your pilot holes through the beam and post and tighten with a ratchet. Do not over tighten.
How to Decorate Deck Support Columns
Browse some examples of decorative deck support posts for tall decks.
How to Sister Deck Joists
Learn about how to sister deck joists over a beam for framing a large deck or adding onto an existing deck.
Deck building tools
As with any professional job, having the right tools can make all the difference.
How to Install Decking Over Existing Concrete Slab, Patio, or Porch
Discover the best techniques to build a deck over concrete, ensuring proper drainage and stability, while creating a beautiful outdoor space.
10 Common Deck Building Mistakes & How to Avoid Them
Building a deck can be a complicated process. Learn how to avoid falling into common deck building pitfalls with tips and advice from the experts at Decks.com.
More Helpful Resources
Explore Articles by Topic
Footings
Information related to installing frost footings for decks
Framing
Learn structural framing methods
Decking
Learn about wood and composite decking materials
Stairs
An in-depth look at the complex issue of how to build stairs
Railings
How to install guardrails and handrails to meet IRC code
Features
An overview on water drainage, benches, planters and lights
Design
The basics of deck design
Planning
Learn about permits and working with contractors
Porches & Patios
Build a covered deck to enjoy all seasons
Ledger
Proper attachment techniques
Care
Maintain your deck to maintain your investment
Materials
An overview on water drainage, benches, planters and lights
Why is Joist Protection so Important for Your Deck?
If you’ve ever seen a piece of wood left out in the weather for any period of time, you know what happens: decay. Whether through wet rot, insect damage, or mildew, the fibers begin to break down.
How to Create Strong Post-to-Beam Connections
Learn how to create a positive structural connection for your post to beam connections. Use lag bolts, through bolts with washers, support cleats and hardware connectors.
How to Size a Deck Beam
Learn about how to choose the correct size beam for your deck. We discuss engineered beams and "sandwiched" style beams.
What to Consider When Building A Wrap-Around Deck
Looking to add a wrap-around deck to your home but unsure of what the process involves? Check out this guide to learn more about top considerations when building a wrap-around deck.
Best Time to Build a Deck
People often wonder when the best time to build a deck is. Learn why building a deck in winter or fall might be your best bet.
Tile decking
Installing tile over a standard deck frame in an exterior environment is a recipe for trouble.
Explore Articles by Topic
Footings
Information related to installing frost footings for decks
Framing
Learn structural framing methods
Decking
Learn about wood and composite decking materials
Stairs
An in-depth look at the complex issue of how to build stairs
Railings
How to install guardrails and handrails to meet IRC code
Features
An overview on water drainage, benches, planters and lights
Design
The basics of deck design
Planning
Learn about permits and working with contractors
Porches & Patios
Build a covered deck to enjoy all seasons
Ledger
Proper attachment techniques
Care
Maintain your deck to maintain your investment
Materials
An overview on water drainage, benches, planters and lights