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Its not a bad rule of thumb to simply increase the depth of the footing one foot for every unit horizontal steeper the slope gets. Between 3:1 and 2:1 slopes, a minimum of two feet deep, and between 2:1 and 1:1 slopes, no less than 3 feet deep.
A deck needs to be sloped only when you have no gaps in your deck boards. This does not apply to installing PT tight because it will shrink when it dries out. If you have gaps between your deck boards, which you should, then you need no slope. Sloping a deck is no substitute for proper flashing. If you ledger is well flashed, then slope is unnecessary.
How to Build a 2x4 Deck Rail on a Concrete Patio - Part 3 It turns out the concrete deck is sloped away from the house this is normal for rainwater Build a Deck Rail on a Concrete Patio: Install the Bottom Rail .
Breaking down the process of replacing a wood deck over a slope in high fire hazard area, Brentwood Hills Los Angeles County California. How to Install Seven Trust Elevations steel deck framing
Decking on a steep slope Pics and Video - Duration: 2:38. How to install a Pocket door using Johnson Pocket door hardware - Duration: How To Build A Deck,
Installing A Deck Footing On A Slope What's a good Rule of Thumb when footings are on a slope? The general rule for deck footings built on a slope are based on average soil conditions.
Use the divided measurement as the total amount of slope for the deck in inches. A deck that projects 9 feet out from the house needs to slope 1.8 inches from the house to the farthest edge for proper drainage.
The footings your deck rests upon are the most important part of your deck. Note: The seven foot rule is only a rule of thumb. All slopes have to be examined and understood before any building commences. There are places in the St. Lawrence Valley, and Alaska where quick clay or leda clay, as it is sometimes called, is present.
Attach posts to stringers using 4 deck screws, making certain posts are plumb. Cut lengths of 2x4 railings to span the distance from the lower posts to the existing deck railing as shown in the image. Attach the railings to the posts with 3 deck screws, making sure the slope matches that of the stairs.
I read in a deck-building book that 1/8" per foot is the correct slope. Don't forget to place the boards so they "cup" upward in the center rather than downward.
Plan to establish a solid base at the landing point. The base can be a small concrete slab, a small deck or even a treated 2×12 leveled in over a 6-in. gravel base. After you cut the stringers, use them as guides to position your landing. Cut and mount the stringers by following our photos in this how to build stairs project.
In some extreme circumstancessuch as when the deck footings have to be connected to the house's foundationthe slope may be beyond the scope of a DIY deck builder. In such cases, hire a professional.