Massachusetts building code deck footings

How deep do deck footings need to be in Massachusetts?

Depth Of Footings The average frost line is Massachusetts is between 30 and 35”. The best source of information regarding your frost line depth is your local building department. My inspector wants to see installing deck footings 48” deep .

How deep do footings have to be for a deck?

Footings typically must extend below the frost line to prevent shifting during freeze-thaw cycles. Dig footing holes about 6 inches deeper than required . Fill the bottom of the hole with 6 inches of gravel and compact the gravel with a 2×4 or wood post.

Do floating decks need footings?

When it comes to floating decks , which are decks that are built very close to the ground, they don’t need any sort of footing . You can either use small concrete blocks and planks, or you can use a post that sets into a pre-formed hole.

Can you build a deck without digging holes?

OZCO Building Products’ OZ- Deck Foundation System is one of the best ways to build a deck without digging holes . It’s a hot-dipped galvanized plate that when combined with OZCO’s post anchors creates a solid foundation so you can build a solid deck without digging holes or pouring concrete.

Can I use deck pier blocks instead of footings?

Pier blocks can be used instead of footings for a ground-level deck not requiring permits. Piers blocks can also be used if the frost level depth is less then the height of the pier block . These footing size requirements are to ensure enough soil bearing to prevent the joist from sinking in the ground.

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Why deck posts should not be set in concrete?

When concrete is poured around a deck post in this way, the post will rot due to moisture buildup by the soil. Concrete tends to absorb moisture and wood expands when it gets wet, so these two factors combined will result in the wood breaking the concrete .

How many footers do I need for a 12×12 deck?

Before starting to build, the first question is: How many footings do I need for a deck? For an attached 12 x 12′ deck, you’ll need at least 3 footings , plus at least 2 more if you’re planning on building stairs with it.

Should deck posts be set in concrete?

There are several ways to set deck posts ; we recommend attaching the posts to concrete footers above the ground. This helps to prevent wooden posts from rotting. Set footers a minimum of 6” below the frost line for your area to prevent movement during freezing temperatures.

How do you build a floating deck over grass?

Instructions Prepare the Deck Area. Clear the ground where the deck will be installed, removing grass and all other organic material, as needed. Set the Concrete Blocks. Build the Outer Frame. Position and Square the Deck Frame. Check the Blocks. Install the Remaining Joists. Install the Deck Boards.

Is a floating deck a good idea?

A floating deck offers numerous advantages. In addition to not requiring a building permit, floating decks are far easier and faster to build than elevated decks . They also don’t require frost depth footings and don’t need handrails because they’re so close to the ground.

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How many footings do I need for a 12×16 deck?

four footings

Is 2×6 good for deck joists?

In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2×8 up to 12 feet; 2×10 to 15 feet and 2×12 to 18 feet. 2×6 joists should only be used on ground-level decks that do not require, and will not provide for, any guards.

How do you prepare the ground under a deck?

To suppress the growth of unwanted vegetation underneath the deck , the area should be covered with landscaping fabric. First, add a layer of coarse sand for drainage. Then cover the sand with landscaping fabric. Bury the fabric under several inches of gravel.

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