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Chapter: Civil Surveying - Fundamentals and Chain Surveying

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Different Types of Surveying Chains

1. Metric chains 2. Steel band or Band chain 3. Gunter's chain or surveyors chain 4. Engineers chain 5. Revenue chain

Different Types of Surveying Chains

 

Following are the various types of chain in common use:

 

1.     Metric chains

2.     Steel band or Band chain

3.     Gunter's chain or surveyors chain

4.     Engineers chain

5.     Revenue chain

 

1.  Metric Chain:

 

        Metric chains are made in lengths 20m and 30m. Tallies are fixed at every five-meter length and brass rings are provided at every meter length except where tallies are attached.

 

2.  Gunter's Chain

 

        Length = 66' (22 yards), No of links = 100, Each link = .66'

 

        Used for measuring distances in miles or furlongs (220 yards), acres (Area).

 

3.  Engineer's Chain

 

        Length = 100', No of links = 100, Each link = 1'

 

        Used in all Engineering Surveys.

 

4.  Revenue Chain

 

        Length = 33', No of links = 16

 

        Commonly used for measuring fields in cadastral Survey.

 

Types of Measuring Tapes in Surveying

 

Tapes are made of different materials:

 

1. Cloth or linen tape

 

        Used for subsidiary measurements

        Very light, easy to handle

        May effect by moisture

 

2. Metric steel tape

 

        Made of steel 

 

        Outer end is provided with a ring for holding

 

3. Invar tape

 

        Used for high precision work

        Made of alloy steel

 

4. Synthetic tape

 

        Made of glass fiber with PVC coating

        These are used for short measurements

 

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