Using Rebar for Concrete Deck Footings
Plain concrete deck foundations without rebar are acceptable under the minimum standards of construction established in the International Residential Code. However, placing reinforcing steel within footings is a relatively easy and inexpensive practice that can provide increased performance. Footings with large bearing areas or unstable soil can benefit from adding rebar to prevent cracking.
When rebar is placed within a footing, it should be completely encased in concrete by a minimum of 3 inches on all sides. When rebar is allowed to project out of the footings, it is susceptible to more rapid corrosion. Over time, rebar allowed to corrode into the footing can weaken the footing, creating areas subject to cracking.
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Cutting a Concrete Pad
Learn how to use a concrete saw to cut a hole in a patio slab to install a deck footing.
Deck Bracing
Learn how to install knee bracing in-between your deck support posts to provide extra strength against high winds and to prevent racking forces for tall decks.
Deck Footing Depth
Find out how deep you need to dig your footings in your area. Look at our U.S. map of extreme frost penetration.
How to Decorate Deck Support Columns
Browse some examples of decorative deck support posts for tall decks.
Building Your Deck For A Hot Tub
Learn how to build a deck to properly support a hot tub or spa. Hot tubs are very heavy. Never place a hot tub on a deck that wasn't designed for the additional load.
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.
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Explore Articles by Topic
Footings
Information related to installing frost footings for decks
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Learn structural framing methods
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Design
The basics of deck design
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Build a covered deck to enjoy all seasons
Ledger
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Care
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How many footings do I need?
Learn how to determine the number of footings and support posts you need for your deck when designing your deck frame.
Layout Deck Foundations
Learn how to lay out your deck footings accurately using triangulation with our step-by-step instructions.
Footing Size
You don’t need to be an engineer to figure out what size footings your new deck will need to safely support it. Everything you need to know is right here.
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.
Determining Deck Beam Height
Learn how to measure in order to set your posts to properly position your deck beam to the correct height. We recommend sloping your deck to shed water away from the house.
How to Install Wood Deck Support Posts
Installing wood deck posts on top of concrete footings will provide additional support for your deck. We recommend using 6x6 posts due to their strength. Learn how install them at Decks.com.
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