Table of Contents
What size footings do I need for a 6×6 post?
FOOTINGS: – Poured concrete footings should be a minimum of 8” wider than the posts (4×4 post – 12” min. width, 6×6 post – 14” min. width), a two level deck or deck with roof – 24”x24”. – The bottom of the footings must be a minimum of 36” below finish grade level.
How big of a concrete tube do I need?
The rule-of-thumb is to use a tube diameter 3 times the post width, therefore use a 12” diameter Sonotube for a 4×4” post.
Do I need rebar in sonotube?
To support a beam for a residential deck, does a Sonotube pier need any rebar? A. We usually recommend that a minimum of two pieces of #4 rebar be placed vertically in an 8-inch-diameter concrete pier supporting a structure. A larger-diameter pier should have four or more pieces of vertical rebar.
What size sonotube for shed piers?
The decision as to whether to go for 10 or 12 inch diameter tubes will depend on the ground conditions where you intend to build your shed. If your site is on sandy or gravelly ground then 10” diameter would likely be sufficient, for a more clay soil then 12” diameter would more likely be adopted.
What size sonotube for a deck?
A good size for a common backyard deck is a 10″ or 12″ diameter for the sonotube and a 20″ base diameter. Of course, you can get a 24″ base size and it will spread weight over an even greater surface area.
How Big Should concrete piers be?
For sizing pier diameters for small foundations, the rule of thumb is “1 inch per foot of span.” Thus, a deck that spans 8 ft. will stand comfortably on 8-in. -diameter piers, while a deck that spans 10 ft. requires 10-in. -diameter piers.
How do you use Sonotubes for fence posts?
Posts in form tubes 2.1 – Dig post holes 10″ to 12″ in diameter and 3′ 6″ to 4′ deep. 2.2 – Pour a 6″ layer of 0-¾ crushed stone into the bottom of each hole and compact. 2.3 – Insert the form tube (sonotube). 2.4 – Use wood supports to secure the tube in position.
Can Sonotubes be left in the ground?
No, it’s not a problem to leave the Sonotube and its plastic “Square Foot” (like these) in the ground forever. Although they will slightly retard the hydration (loss of water) of the concrete mix, the concrete will achieve enough strength in a few days to build upon.
How deep should a 6×6 post be in the ground for a deck?
Dig an 8″-diameter hole at least 6″ deeper than your area’s frost line for each 4×4 post, using a power auger, hand auger, or post-hole digger. A 6×6 post requires a 10″-diameter hole.
How long will treated 6×6 last in the ground?
5 Answers. A PT post will last a long time in concrete, maybe 5 to 10 years in soil alone.
How many bags of concrete does it take to fill a 12 inch sonotube?
27 cubic feet per cubic yard. So 135 bags would be needed.
How much concrete do I need for a 12 sonotube?
Concrete Requirements Size Chart Diameter (in.) Height of Column 10 .061 .323 12 .087 .466 14 .119 .634 16 .155 .827.
How many bags of concrete do I need for an 8 sonotube?
Concrete Mixes SONOTUBE # of bags required per: 25 kg 8″ x 4′ tube 3.2 8″ x 8′ tube 10″ x 4′ tube 5.1 10″ x 8′ tube 12″ x 4′ tube 7.3 12″ x 8′ tube.
How much concrete do I need for a sonotube?
Sono Tube Calculator For example, a sono tube with a 10″ diameter and a 4′ depth requires 0.08 cubic yards of concrete.
How deep do concrete piers need to be?
By code, the bottom of a footing must be at least 12 inches deep and below the local frostline—whichever is deeper—and bear on stable, undisturbed soil that is free of organic matter. And the code requires a minimum compressive strength of 2,500 psi for the concrete.
How deep should a sonotube be for a shed?
Determine how deep you want your tubes. Dig down to the frost line before pouring the concrete. Frost lines vary depending on your region. Start by assuming you want a 10-inch diameter Sonotube that is about 3 feet deep.
How far apart should concrete piers be for a shed?
Cement blocks are built in piers (think mini-towers–but they don’t lean) 3-5 feet apart. If the sheds are built like they should be, the structure of the shed easily spans the piers–unless you’re parking the car in it, in which case you’ll want to consider a gravel pad.
How many piers do I need for a 10×12 shed?
To give you an idea of the total, if you are constructing a 10 ft. x 12 ft. shed, and are creating 16 piers, that will cost approximately $1,000. However, the actual cost will vary if your piers need to be deeper or if you chose not to place the piers based on 4-foot spans.
What size pier do I need?
To determine the load of a deck pier, you must take half the length of the joist span multiplied by half the length of the beam span (measured from pier to pier). This number is then multiplied by 50, which is the 40 psf live load, 10 psf dead load mentioned earlier.
Do concrete piers need footings?
You can also use concrete block to build your own piers, but this requires that you pour a concrete footing at the bottom of the hole for the block to rest on. You then have to fill the cores of the concrete block with steel rods and a concrete mix to make them solid.
How high can concrete piers be?
Piers between 36 and 80 inches (914 and 2032 mm) in height and all corner piers greater than 24 inches (610 mm) in height shall be at least 16 inches by 16 inches (406 mm by 406 mm) consisting of interlocking masonry units and shall be fully capped with minimum 4-inch (102 mm) solid masonry units or equivalent.
How deep should my piers be?
The minimum thickness for a pier is 8 inches. The minimum thickness for pier footings is 8 inches or 1-1/2 times the length of the footing projection from the pier, whichever is greater.
