Deck Bracing
Many forces in addition to gravity can affect a deck’s ability to remain stable during its lifetime as it is set under a variety of conditions. High winds can cause uplift and top heavy decks can lead to lateral shifting or racking both of which cause tremendous stress and possible failure to a deck structure. We recommend using 6x6 structural posts because they have twice the resistance to sway than 4x4’s. Tall decks are much more susceptible to these unbalancing forces. Burying your posts is another technique that will increase lateral resistance and protect your deck from racking. We recommend installing diagonal knee braces to help support decks that are over 10' high.

Decks with an above grade pier footing type should have bracing installed to prevent the post base from acting as a pivot. Bracing comes in many forms but is always used to prevent racking and increase the frames stiffness. For instance 4x4’s can be installed at 45 degree angles parallel to the beam as Y or knee braces connecting the beam to the sides of the structural posts. Always use bolts rather than nails to insure a strong connection. The taller the structural posts the longer and more substantial the braces should be.
Unfortunately there are no hard rules regarding bracing. You will probably not be required to install bracing but it is an option worth considering because it will increase the strength of your deck. Bracing between posts using X or K bracing can be also be used to make a deck more rigid. In this method you attach 2x4’s or 2x6’x from the top of one post to the bottom of the next and vice versa resembling the understructure of a wooden railroad bridge. This technique is rarely used because it is obstructive and unattractive. One of the only situations where you would be likely to need X bracing would be if your deck had long support posts and was sited on a sloping lot.
How to Decorate Deck Support Columns
Browse some examples of decorative deck support posts for tall decks.
How to Angle Corners and Joists
Learn how to frame a deck with angled or clipped 45-degree corners using a cantilever beam.
How To Build an Octagon Deck
Learn how to build an octagon-shaped deck. Octagon decks can be used as the floor for a gazebo roof.
Decking Patterns
Installing your decking at a 45-degree angle is a popular style for decks. This can be done to reduce decking seams or just for appearance.
How to Demolish & Remove a Deck
At some point, it might become necessary to remove an old deck, due to age or condition. Learn more about what's involved in a deck demolition and removal project.
Dos & Don'ts for Homeowners to Consider When Building a Deck
Your dream deck can take whatever shape you like. The trick is making it fit your budget and site conditions. While the deck doesn’t have to be built as a rectangle, there could be good reasons for doing just that.
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Deck Bracing
Many forces in addition to gravity can affect a deck’s ability to remain stable during its lifetime as it is set under a variety of conditions. High winds can cause uplift and top heavy decks can lead to lateral shifting or racking both of which cause tremendous stress and possible failure to a deck structure. We recommend using 6x6 structural posts because they have twice the resistance to sway than 4x4’s. Tall decks are much more susceptible to these unbalancing forces. Burying your posts is another technique that will increase lateral resistance and protect your deck from racking. We recommend installing diagonal knee braces to help support decks that are over 10' high.

Decks with an above grade pier footing type should have bracing installed to prevent the post base from acting as a pivot. Bracing comes in many forms but is always used to prevent racking and increase the frames stiffness. For instance 4x4’s can be installed at 45 degree angles parallel to the beam as Y or knee braces connecting the beam to the sides of the structural posts. Always use bolts rather than nails to insure a strong connection. The taller the structural posts the longer and more substantial the braces should be.
Unfortunately there are no hard rules regarding bracing. You will probably not be required to install bracing but it is an option worth considering because it will increase the strength of your deck. Bracing between posts using X or K bracing can be also be used to make a deck more rigid. In this method you attach 2x4’s or 2x6’x from the top of one post to the bottom of the next and vice versa resembling the understructure of a wooden railroad bridge. This technique is rarely used because it is obstructive and unattractive. One of the only situations where you would be likely to need X bracing would be if your deck had long support posts and was sited on a sloping lot.
How to Decorate Deck Support Columns
Browse some examples of decorative deck support posts for tall decks.
Pool Decks
Decks constructed around above-ground pools are no different than any other free-standing deck.
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.
Decking Patterns
Installing your decking at a 45-degree angle is a popular style for decks. This can be done to reduce decking seams or just for appearance.
Decking Patterns
Installing your decking at a 45-degree angle is a popular style for decks. This can be done to reduce decking seams or just for appearance.
How to Demolish & Remove a Deck
At some point, it might become necessary to remove an old deck, due to age or condition. Learn more about what's involved in a deck demolition and removal project.
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