## How do I know what size sonotube to get?

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.

**How many bags of concrete do I need for 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 many cubic feet is a 12 inch sonotube?

1 cubic foot is a box 12 inches by 12 inches by 12 inches, so the calculation to convert cubic inches to cubic feet must use 12x12x12 = 1,728 cu. in.

**How many 80 pound bags of concrete does it take to fill a sonotube?**

You will need approximately 0.785 cubic feet or either 1 1/2 of 80lb (pound) or 2 of 60lb (pound) bags of concrete to fill a 12 inch wide Sonotube per foot deep. So, for 3 feet deep, 2.36 cubic feet (or 4 bags of 80lb or 5 1/2 bags of 60lb) of concrete will be needed.

## How do you calculate footing size?

To determine the size of the footing, a simple formula is used: Structural Load (lbs) / Soil Capacity (psf) = Footing Surface Area Required (sq. ft.)

**How do you calculate pier size?**

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.

### How do you calculate concrete in a cylinder?

The base area of a concrete cylinder is equal to its volume divided by its height. Say a concrete cylinder has a volume of 340 cubic inches and a height of 12 inches. Its area will then be 340 in³ / 12 in = 28.33 in² .

**How many bags of concrete do I need for a 16 inch sonotube?**

You will need approximately 1.39 cubic feet or either 2.32 of 80lb (pound) or 3.08 of 60lb (pound) bags of concrete to fill a 16 inch wide Sonotube per foot deep. So, for 4 feet deep,5.56 cubic feet (or 9 1/2 bags of 80lb or 12 1/2 bags of 60lb) of concrete will be needed.

## How much concrete is in a 12 sonotube?

A 12 inch sonotube requires 1.74 60 lbs. or 1.31 80 lbs. bags of concrete to fill it one foot. That’s .

**How many bags of concrete do I need for 12 sono?**

A 12 inch sonotube requires 1.74 60 lbs. or 1.31 80 lbs. bags of concrete to fill it one foot. That’s . 029 cubic yards or 104 lbs.

### How do you calculate concrete bags?

For concrete, the formula for volume is as follows: length x width x thickness.

…

Use the following yields per each bag size:

- 40 pound bag yields .011 cubic yards.
- 60 pound bag yields .017 cubic yards.
- 80 pound bag yields .022 cubic yards.

**How do I calculate my foundation?**

Take the entire perimeter length of the footer and multiply it by the width. For example, if you have 100 feet of footers that are two feet wide, multiply the two to come up with 200 feet.

## What is the standard size of footing?

The minimum depth of footings below the surface of undisturbed soil, compacted fill material or controlled low strength material (CLSM) shall be 12 inches (305 mm). Where applicable, the requirements of CBC Section 1809.5 shall also be satisfied. The minimum width of footings shall be 12 inches (305 mm).

**How do you calculate column footings?**

How to Calculate Footing Size

- Determine the width and length of the cement slab in inches.
- Divide the width by 12 to convert it to feet.
- Divide the length by 12 to convert it to feet.
- Determine the depth or thickness that is required for the footing in inches.
- Multiply the width by the length and then by the depth.

### How do you calculate deck load capacity?

To find out the maximum weight your deck can hold, you’ll need to multiply the total area by 50 psf. For example, a 100 square foot deck can support 5000 pounds. Again, this is an estimate that engineers have decided is a safe value for a deck accounting for the typical items a deck would hold.

**How do you calculate concrete volume?**

Here’s what the math looks like for a 10′ by 10′ concrete patio:

- 10 x 10 = 100 square feet.
- 4 ÷ 12 = .33.
- 100 x .33 = 33 cubic feet.
- 33 x .037 = 1.22 cubic yards.

## How do I calculate psi for concrete?

What is Concrete Ratio for 3000 psi? Which Grade of – YouTube

**How much concrete do I need calculator?**

CONCRETE CALCULATOR FORMULA

Multiply the length by the width to determine square footage. Convert the thickness from inches to feet. Multiply the thickness in feet by the square footage to determine cubic feet. Convert cubic feet to cubic yards by multiplying by .037.

### Do I need rebar in sonotube?

Yes, you need rebar in sonotubes. It’s easy to install with spacers and very cheap. The added strength and stability it will add to your deck or another outbuilding is worth the extra time and effort to install.

**How many bags of concrete do I need calculator?**

For concrete, the formula for volume is as follows: length x width x thickness. To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield.

## How do you calculate concrete material?

Thus, the quantity of cement required for 1 cubic meter of concrete = 0.98/0.1345 = 7.29 bags of cement. The quantities of materials for 1 m3 of concrete production can be calculated as follows: The weight of cement required = 7.29 x 50 = 364.5 kg. Weight of fine aggregate (sand) = 1.5 x 364.5 = 546.75 kg.

**What is the formula for depth?**

D = V Times 1/2 T D = Depth (in meters) T= Time (in seconds) V = 1507 m/s (speed of sound in water) Calculate the depth foe each of the times given below, using the formula above.

### What is depth of footing?

**What is the size of column?**

Standard Size Of Column

Height of Structure | Different Levels | Size of Column in mm |
---|---|---|

Upto 10 storey | 1 – 10 floors | 700 mm X 700 mm |

Upto 20 storey | 1 – 7 floors | 750 mm X 750 mm |

8 – 14 floors | 600 mm X 600 mm | |

15 – 20 floors | 450 mm X 450 mm |

## What are the 3 types of foundations?

Foundation types vary, but likely your house or home’s addition does or will have one of these three foundations: full or daylight basement, crawlspace, or concrete slab-on-grade.