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**Thumb Rules For Civil Site Engineer pdf**

**Thumb Rules For Civil Engineering** is essential for any civil engineer, Site engineer, or civil supervisor. They play a crucial role while taking quick decisions on site. There is some **civil engineering basic knowledge **that every civil engineer must know.

**The Thumb Rule of Civil Engineering** o the thumb rule for construction helps you in finding out the solution using a simple mathematical formula and make smart decisions whenever needed.

But, while using these thumb rules, you must remember that the thumb rule never gives the exact or accurate results, you just have used them for approximate results.

There is** a **number** of Thumb Rule For Civil Engineers that** we used in construction work. So, the following are some most frequently used Thumb rules on the Construction site.

The Thumb rule method is an approximate & comparing method. In thumb rules and the units are not the same when we compare to get the results. So, ignore units while performing the thumb rule.

**Read More: 50 + Civil Engineering Interview Questions & Answers**

**Thumb Rules for Civil Engineering In Construction**

following are thumb rule in civil engineering,

### 1) **Thumb Rule for Concrete Volume**

The volume of concrete required = 0.038 m3/square feet area

**Example:-**If Plan Area = 40 x 20 = 800 Sq. m.

So, for the plan area of 800 Sq. m. the area the total volume of concrete required

= 800 x 0.038m3 = 30.4m3

### 2) **Thumb Rule for Steel Quantity for Slab, Beams, Footings & C**olumns

Following are some important **thumb rule for steel** calculation for slab, beam, column and footings.

**Steel required in residential buildings = 4.5 Kgs – 4.75 Kgs / Sq. Ft.**

**Steel required For Commercial buildings = 5.0 Kgs-5.50 Kgs/Sq. Ft.**

You can also use BN Datta recommendations for the more accurate result:

The following recommendations** Thumb Rules For Civil Engineering are given in B N Datta** for the Steel quantity used in different members of the building.

**Read More: Top 10 Civil Engineering Site Work**

### 3) **Percentage of Steel in Structural Members**

following are thumb rule for reinforcement in concrete members,

1) Slab – 1% of the total volume of concrete (Slab steel calculation thumb rule)

2) Beam – 2% of the total volume of concrete

3) Column – 2.5% of total volume of concrete

4) Footings – 0.8% of the total volume of concrete

**Example:**

How to calculate the steel quantity of slab having the Length, width, and depth of the slab is 5m x 4m x 0.15m

**Step 1: Calculate the Volume of Concrete**:

The Total Volume of Concrete for given Slab = 5 x 4 x 0.15

= 3m3

**thumb rule for steel in rcc**

**Step 2: Calculate The Steel Quantity Using Formula**:

As per the guidelines are given in the B N Dutta reference book the steel quantity of slab is 1% of the total volume of concrete utilized.

Thumb rule to estimate Steel quantity of above slab = Volume of Concrete x Density of Steel x % of Steel of Member

Steel weight required for above slab = 3 x 7850 x 0.01 = 235Kgs

For accurate estimation, you can refer to Bar Bending Schedule

**Thumb Rules for Civil Site Engineer pdf**

**Read More: ** **Civil Construction Material Calculator**

**4) Thumb Rules For Shuttering Work**

**Shuttering costs is taken as 15-18% of the total construction of the building. **Shuttering work is done to bring the concrete in Shape. Thumb rule to estimate the shuttering required is **6 times the quantity of concrete or 2.4 times of Plinth area.**

For example, the concrete quantity is 0.5m3, then

Area of Shuttering is 0.5 x 6 = 3m2

**Components of Shuttering:-**

The Shuttering plate Ply, Battens, Nails are components of Shuttering.

**Shuttering Ply Quantity estimation:**

Suppose, The shuttering Ply has a length, width & depth of 2.44 x 1.22 x 0.012

**The No. of Shuttering Ply sheets = 0.22 times of Shuttering**

Suppose, the shuttering area = 3m

Then Ply required for shuttering = 0.22 x 3 = 0.66m2

### 5) **Battens Quantity Calculation**

Shuttering batten usually has a length & width of 75mm x 40mm.

**Batten Quantity = 19.82 x No. of Ply Sheets**

If work requires 25 Ply sheets, the total quantity of Battens are 19.82 x 25 = 495 Battens

Nails & Binding Wire Quantity in Shuttering:

**Approximately, 75 gams of Nails used in the shuttering of the 1m2 area.**

**75gms of Binding wire is used for every 1m2 of Shuttering.**

**Thumb rule for Shuttering oil estimation :**

Shuttering oil is applied on the shuttering plate surface used to de-frame or de-assemble from the concrete easily.

**Total required Shuttering oil = 0.065 x Total Area of Shuttering**

(or)

**For every 15m2 of shuttering 1 liter of shuttering oil is consumed.**

Example :

If, total area of shuttering is 15 m2, then Shuttering oil Consumption = 0.065 x 15 = 0.975.

**Thumb Rules For Civil Engineering**

**Read More:** **17 Tips For How To Reduce Construction Cost**

**6) Thumb Rule for Cement, Sand, Coarse Aggregate Quantity Calculations**

**Note: 1 bag of cement = 50Kgs**

Thumb rule for Cement required in Brickwork, Cement Masonry & Plastering work in construction:

**7) Thumb Rules For Civil Engineers for Brickwork**

following are **Thumb Rules for civil engineering** for brick work and cement quantity calculations.

Brickwork for 1m^{3} | Cement Qty in m^{3} | Cement Qty in Bags |

230 mm Brickwork | 0.876m^{3} | 25.4 Bags |

115 mm Brickwork | 0.218m^{3} | 6.32 Bags |

**Thumb Rules for civil engineering**

**8) Thumb Rules For Cement Masonry Quantity**

Cement Masonry Type & Mix | Cement Qty in Bags | Cement Qty in Kgs |

200mm in Cement Masonry work of Ratio 1:6 | 0.124Bags/m^{2} | 6.2Kgs/m^{2} |

150mm in Cement Masonry work of Ratio 1:6 | 0.093Bags/m^{2} | 4.65Kgs/m^{2} |

200mm in Cement Masonry work of Ratio 1:4 | 0.206Bags/m^{2} | 10.3Kgs/m^{2} |

150mm in Cement Masonry work of Ratio 1:4 | 0.144Bags/m^{2} | 7.2Kgs/m^{2} |

100mm in Cement Masonry work of Ratio 1:4 | 0.103Bags/m^{2} | 5.15Kgs/m^{2} |

**Thumb Rules for civil engineering**

**8) Thumb Rules Plastering Quantity **

Type of Plastering | Cement Qty in Bags | Cement Qty in Kgs |

Rough Plastering | 0.09 Bags/m^{2} | 4. 5Kgs/m^{2} |

Internal Wall Plastering | 0.09 Bags/m^{2} | 4.5 Kgs/m^{2} |

Duct Plastering | 0.09 Bags/m^{2} | 4.5 Kgs/m^{2} |

External Wall plastering | 0.175 Bags/m^{2} | 8.75 Kgs/m^{2} |

Stucco Plastering | 0.175 Bags/m^{2} | 8.75 Kgs/m^{2} |

Lathen Plastering | 0.55 Bags/m^{2} | 27.5 Kgs/m^{2} |

**Thumb Rules for civil engineering**

## FAQs

### Q.1 How do you calculate steel by thumb rule?

Following are Thumb Rule for reinforcement steel in concrete members,

1) Slab â€“ 1% of the total volume of concrete (Slab steel calculation thumb rule)

2) Beam â€“ 2% of the total volume of concrete

3) Column â€“ 2.5% of total volume of concrete

4) Footings â€“ 0.8% of the total volume of concrete

### Q.2 What is a good rule of thumb?

Thumb RuleÂ can be called a guideline, idea, or principle that helps you make quick decisions. **“Arrive early” **is anÂ efficient good Thumb RuleÂ for most appointments. It referred to builders who frequently use theirÂ thumbÂ to estimate measurements. It is a helpful rule even being inexact.

### Q.3 What is the basic knowledge of civil engineering?

**BASIC THINGS FOR CIVIL ENGINEER:**

1. Lapping in reinforcement is not allowed for the bars having diameters more than 36 mm.

2. Steel Char maximum spacing is 1.00 m (or) 1 No per 1m^{2}.

3. In steel dowels, a rod minimum of 12 mm diameter should be used.

4. Steel Chairs minimum of 12 mm diameter bars to be used.

5. Longitudinal reinforcement should not less than 0.8% and more than 6% of gross C/S.

6. The minimum bars used for a square column are 4 Noâ€™s and 6 Noâ€™s for the circular column.

### Q.4 What is the thumb rule to determine beam depth?

The method for determining the width-depthÂ ratio of reinforced concreteÂ beamsÂ is not specifically given in codes. However, a thumb rule can be used i.e taking depth that is two and a half to three times theÂ beam’sÂ width. For long-spanÂ beams, it is generally economical to use deep and narrow sections.

### Thumb Rules For Civil Site Engineer pdf

**Thumb Rules For Civil Engineering** pdf is essential for any civil engineer, Site engineer, or civil supervisor. They play a crucial role while taking quick decisions on site. There is some **civil engineering basic knowledge **that every civil engineer must know.

### Thumb Rules for Civil engineering

** Thumb ruleÂ requirement of standard materials and standard calculation in high raised building**,

Steel =3 to 5 kg / sqft.

Cement =0.5bags/ sqft.

RMC =0.05 m3/sqft.

Block =12.5 nos /sqm.

Electrical cast = Rs 133/sqft.

Plumbing cost = Rs 126/sqft.

Fire fighting cost = Rs 40/sqft.

External development = Rs 94.5/sqft.

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SARTAJ AHMAD BHATWhat about Culvert and bridge details. Please may send in relevant

RoshanThe volume of concrete required = 0.038 m3/square feet area

Example:-

If Plan Area = 40 x 20 = 800 Sq. Ft.

So, for the plan area of 800 Sq. Ft. area the total volume of concrete required

= 800 x 0.038m3 = 30.4m3o

Sir, plan area square feet Mai hai aur concrete density cubic meter Mai ? It is right sir?

Mike MahajanSorry, Area is 40 x20 m = 800 sq. M

It is by mistake.

Thanks for knowing me

sjsir,

sqm of area and cubic metre of concrete.

can we evaluate like that?

units are not in sync

GAURAV SHRESTHAThe volume of concrete required = 0.038 m3/square feet area

OR

The volume of concrete required = 0.038 m3/square METER area??

SantoshFor 800sqm area 0.38cum conc

Ie 800 x 0.38 = 304cum concrete

SekarCement consumption is 63 kg only for 1 cum bwork .why 24 bags.

Shrikant BendkaleCement content for brickwork is 50-70 kg then why given as 25.4 bag

Mohd mehrajIn have 2plots. 23*29. Second 25*36. TOTAL LENGTH 48. IF I TAKE SQURE 48*29. PLS HELP ME FOR G+ 2 PLAN . GROUND.FLOOR FOR OWNER 1 AND 2 FLOOR FOR RENTAL

Manikandan RMKI leaning for more Impermation at this web site. All comments is very correct and easy to leaning the method.

ukasReally useful this article

Devendra shindevery usefull

RuwanCan you please tell me thumb rule estimation for aluminium and glass facade multi storey buildings?

PushprajHow to downlode pdf

Rohit KhandeSir , this article is very usefull

Thank you sir

Sir please provide complete rrc design of g+1 building

Ranjan PirkeWhere is the link for downloading this Article?

Mike Mahajansave as pdf

Load Calculation on Column, Beam & Slab