How to Nail a Deck Beam
When securing 2 or more dimensional wood boards together to form a beam you will need to use the proper number and size nails to create a solid member. A 2x10 Beam should use a minimum of (4) - 3” nails fastened in a vertical pattern from both sides of the beam every 16” on center. Be on the safe side when in doubt and use extra nails, having too few nails can result in diminished holding strength that might allow the beam to separate. Always verify that you are using nails that are compatible with pressure treated lumber because some nails will corrode or dissolve with exposure to the chemicals found within treated wood.
SaveIt is easier to combine the boards on the ground before setting the beam.
Try to use very straight and dry wood boards and build the beam on a flat surface or on top of saw horses to keep the corners aligned. When working with an extraordinarily heavy beam you may want to build it in sections to make lifting easier. If this is the case make sure the splices will fall over the top of support posts. You may also want to mark the beam with a construction pencil to indicate the locations of the joists to make your job easier once the beam is raised.
Make sure the tops of the boards are flush. Nail them at an angle so the point of the nails won't go through the beam. Reverse the angle of the nails at the ends of the beam to lock it into place for strength. Start at about 4" from the ends of the beam. Nail both sides of the beam. Do not use screws.
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Browse some examples of decorative deck support posts for tall decks.
Beam Span Chart
Learn how to size your deck beam using this easy-to-use span table. Just cross-reference the post spacing and joist length to determine the beam size.
How To Build an Octagon Deck
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Dos & Don'ts for Homeowners to Consider When Building a Deck
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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.
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Railings
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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.
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Follow our step by step tutorial for splicing a deck beam over a support post. Never split a beam in the center of a span.
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Install shims or notch joist bottom across uneven joists to level your deck surface.
What to Consider When Building A Wrap-Around Deck
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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