**How to Prepare Cost Estimate of Septic Tank | Quantity of Septic Tank**

In this Article today we will talk about the **How to Prepare Cost Estimate of Septic Tank | Quantity of Septic Tank | Estimate of Septic Tank | Septic Tank Calculator | How to Calculate the Cost of Septic Tank**** |** **Septic Tank Estimate Excel | Concrete Septic Tank Cost | Excavation of Septic Tank | Brickwork in Septic Tank**

**How to Prepare Cost Estimate of Septic Tank:**

Before starting this estimate you must read this article: **How to Calculate the Size and Capacity of Septic Tank | Formula**

**Septic Tank Detail:**

**Plan Size:**11′-0″ X 7′-6″

**Depth:**– 6′-9″

**Septic Tank Items:**

**Earth Work Excavation****Filling Quantity of Septic Tank****P.C.C****Reinforced Concrete Work****Reinforcement****Brick Work**– 230mm:**Plastering Septic Tank Calculator****Manhole**

**How To Prepare Cost Estimate of Septic Tank:**

**Description:**

**Reinforced Concrete Work:**

**slab**,

**lintel**, roof slab, lintel and sunshade excluding fabrication of RCC items and including cost and conveyance of all materials labor, etc.,

**Septic Tank Calculator**

**Reinforcement:**

**R.C.C**work including straightening, cutting, bending, placing in position & binding all TMT bars

**Septic Tank Estimate Excel**

**Centering and Shuttering work**:

**Concrete Septic Tank Cost**

**Earthwork**:

**Earthwork**in excavation including disposal of the earth; disposed earth to be leveled and neatly dressed.

**Excavation of Septic Tank**

**How To Prepare Cost Estimate of Septic Tank:**

**P.C.C: **

**Sand Filling:**

**Excavation of Septic Tank**

**How To Calculate the Cost of Septic Tank?**

Let us estimate the **brick masonry septic tank **as shown below. **Brickwork in Septic Tank**

**1. Excavation:**

Volume of **excavation**

= [length × breadth × depth]

Here, the length & breadth of excavation is the same as that of PCC.

= [ 11ft. × 7.5ft. × 6.75ft.]

= **556.88 cu ft.**

**2. PCC:**

__Given data:__

__Given data:__

The extra length of **PCC** on all 4 sides of the **septic tank** is 6″ (0.5ft.)

Length = 11ft.

Breadth = 7.5ft.

Thickness= 5″ = 0.416 ft.

(As 1ft. = 12 inches)

**Brickwork in Septic Tank**

**Volume of PCC:**

= [length × breadth × thickness]

= [ 11ft. × 7.5ft. × 0.416ft.]

=** 34.32 cu ft.**

**3. Brick masonry:**

#### **a. **** 9″ thick outer wall:**

#### __Given data:__

__Given data:__

Length = 10ft.

Width = 9″ = 0.75 ft.

(As 1ft. = 12 inches)

Height = 6ft.

Let us find the vol. of brick masonry by the **longwall short wall method**.

**The volume of the longwall:**

= [2nos.×( length × width × height)]

= [2nos. × ( 10 ft. × 0.75 ft. × 6 ft.)]

= [ 2nos. × 45 cu ft.]

= **90 cu ft.**

**The volume of the short wall:**

= 2nos. × [{ length} × width × height]

= 2nos. × [{6.5 ft.- (2nos.× 0.75 ft.)} × 0.75 ft. × 6 ft.]

= 2nos. × [{5 ft.} × 0.75 ft. × 6 ft.]

= 2nos. × [ 22.5 cu ft.]

= **45 cu ft.**

**The total volume of 9″ thk. brick wall**

= the volume of { longwall + short wall}

= {90 cu ft. + 45 cu ft.}

= **135 cu ft.**

**b. 4″ thick inner partition walls:**

**Baffle wall-1**

The volume of the baffle **wall**-1

= [ {length} × width × (height)]

= [{ 6.5 ft.- (2nos.× 0.75 ft.)} × 0.33 ft. × (6 ft. – 1.5 ft.)]

= [{5 ft.} × 0.33 ft. × (4.5 ft.)]

= **7.425 cu ft.**

The volume of wall-2

= [ {length} × width × height]

= [{6.5 ft.- (2nos.× 0.75 ft.)} × 0.33 ft. × 6 ft.]

= [{5 ft.} × 0.33 ft. × 6 ft.]

= **9.90 cu ft.**

**The total volume of 4″ thk. brick wall**

= the volume of { wall-1+ wall-2}

= {7.425 cu ft. + 9.9 cu ft.}

= **17.33 cu ft. **

**4. Plastering:**

**a. For 9″ brick wall:**

Area of **plastering **

= 2nos. × [ (area of a longwall) + (area of a short wall)]

= 2nos. × [ (10ft. × 6ft.) + (5ft. × 6ft.)]

= 2nos. × [ 60 sq ft. + 30 sq ft.]

= **180 sq ft.**

**Note:** Length & height of the longwall & short walls are taken for area calculation.

**b. For 4″ inner wall**

Area of plastering

= 2 sides. × [ (area of wall-1) + (area of wall-2)]

= 2 sides × [ ( 5ft. × 4.5ft.) + ( 5ft. × 6ft.)]

= 2 sides × [ 22.5 sq ft. + 30 sq ft.]

= **105 sq ft.**

**c. For floor base**

Floor area plastering

= [ {length} × { breadth.}]

= [{10 ft. – (2nos. × 0.75ft.)} × {6.5ft. – (2nos. × 0.75ft.)}]

= [ {10ft. – 1.5 ft.} × { 6.5ft. – 1.5ft.}]

= [8.5ft. × 5ft.]

= **42.5 sq ft.**

**Total plastering area**

= plastering area of [ 9″ wall + 4″ wall + floor]

= [180 sq ft. + 105sq ft. + 42.5 sq ft.]

= **327.5 sq ft.**

**5. RCC slab:**

The area of the **RCC slab **

= [length × breadth ]

= [ 10ft. × 6.5 ft.]

= **65.0 sq ft.**

**6. Miscellaneous:**

Inlet & outlet pipe of 4″ dia = 2 nos.

Manhole cover with frame = 1no.

Vent pipe = 1no.

Let us calculate the **cost of a brick masonry septic tank** as shown below.

**Estimation and Rate Analysis of a Septic Tank:**

Here, we will estimate the **septic tank in sheet format** as given below.

Sl. No. |
Description |
Nos. |
Length in ft. |
Breadth in ft. |
Depth in ft. |
Qty. |
Total Qty. in c ft/sq ft. |

1. | Earthwork Excavation | 1 | 11 | 7.5 | 6.75 | 556.88 | 556.88 |

2. | M20 grade PCC | 1 | 11 | 7.5 | 0.416 | 34.32 | 34.32 |

3. | 9″ brick masonry in 1:6 CM. | ||||||

3a. | Long wall | 2 | 10 | 0.75 | 6.0 | 45 | 90 |

3b. | Short wall | 2 | 5 | 0.75 | 6.0 | 22.5 | 45 |

Total volume of 9″ brick masonry | 135.0 | ||||||

4. | 4″ brick masonry in 1:5 CM. | ||||||

4a. | Baffle wall-1 | 1 | 5 | 0.33 | 4.5 | 7.425 | 7.425 |

4b. | Wall-2 | 1 | 5 | 0.33 | 6.0 | 9.90 | 9.90 |

Total volume of 4″ brick masonry | 17.33 | ||||||

5. | 12mm thick Plastering in 1:4CM | ||||||

5a. | 9″ long wall | 2 | 10 | —— | 6.0 | 60 | 120 |

5b. | 9″ short wall | 2 | 5 | —— | 6.0 | 30 | 60 |

5c. | 4″ baffle wall-1 (on 2 sides) | 2 | 5 | —— | 4.5 | 22.5 | 45 |

5d. | 4″ wall-2 (on 2 sides) | 2 | 5 | —— | 6.0 | 30.0 | 60 |

5e. | Floor area. | 1 | 8.5 | 5.0 | —– | 42.5 | 42.5 |

Total area of plastering | 327.50 | ||||||

6. | RCC slab in M25 grade concrete | 1 | 10 | 6.5 | —– | 65 | 65 |

7. | Manhole cover & frame of 2ft × 2ft size. | 1 no. | |||||

8. | Vent. pipe | 1 no. | |||||

9. | 4″ dia. inlet & outlet pipe | 2 nos. |

**Now, the cost of a septic tank is calculated in table format.**

Sl. no. |
Item. |
Qty. |
Rate. in INR. |
Unit. |
Cost in INR. |

1. | Excavation | 556.99 | 11/- | Cu ft. | 6,126.89 |

2. | PCC | 34.32 | 207.15/- | Cu ft. | 7,109.39 |

3. | 9″ brick masonry. | 135 | 159.52/- | Cu ft. | 21,535.20 |

4. | 4″ brick masonry. | 17.33 | 174.17/- | Cu ft. | 3,018.37 |

5. | Plastering. | 327.5 | 18.10/- | Sq ft. | 5,927.75 |

6. | RCC slab | 65 | 210/- | Sq ft. | 13,650.00 |

7. | Man hole. | 1 | 1800/- | No | 1,800.00 |

8. | Vent pipe. | 1 | 450/- | No | 450.00 |

9. | Inlet & outlet pipe. | 2 | 350/- | No | 700.00 |

6. | The cost of septic tank = | 60,317.40 | |||

7. | Add 12% for contractors profit = | 7,238.09 | |||

10. | The total cost of septic tank = |
67,555.49 |

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### Types of Structural Cracks in Concrete Beams and Their Causes

### Bar Bending Schedule of Lintel Beam | Typical Beam | Detailed Beam

### How To Layout a Building or Foundation | Construction Layout Techniques

**Conclusion:**

Full article on **How to Prepare Cost Estimate of Septic Tank | Quantity of Septic Tank | Estimate of Septic Tank | Septic Tank Calculator | How to Calculate the Cost of Septic Tank**** |** **Septic Tank Estimate Excel | Concrete Septic Tank Cost | Excavation of Septic Tank | Brickwork in Septic Tank****.** Thank you for the full reading of this article in “**The Civil Engineering**” platform in English. If you find this post helpful, then help others by sharing it on social media. **If any formula of BBS is missing from this article please tell me in comments.**

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