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beams

Beams sit on top of, or are attaches to posts and support the floor joists of the deck substructure.

12. Custom Deck Framing

Setting Deck Frame on an Angle

Many home owners prefer to have the decking installed on a 45° angle to the house, so that the lines create a more interesting pattern. Rather that set your decking on a 45° angle to the frame, the frame itself can be constructed on the 45° angle. This may seem more complicated, but there are far fewer joists than decking boards. Adjusting the frame saves time and simplifies the process.

11. Framing High Decks

Building codes call for stronger materials, and joints the higher off of the ground a structure becomes. In many jurisdictions, ground level decks may not require any inspection, while second story decks nearly always do. Safety is the primary concern driving these differences.

Here are some changes to check your local code for:

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10. Framing a Level Change

When framing a multi-tiered deck with more than one level, frame posts can be shared between more than one level. Simply stack the double beams on top of the beams for the lower level, using the same width of material. The joists for your upper level should be sized to match the height of the deck steps, so that all changes of elevation are similar, to prevent trip hazards.

Shared deck support post illustration.

5. Installing 2x8 Deck Beams

If the outside edge of your deck is at least 17” above grade, a double 2x8 beam should be installed to support the joists along the outside. The joists will then extend over the beam in a cantilever position.

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