TYPES OF ENGINEERING CHAIN
Types of Surveying Chains
Following are the various types of chain in common use:
- Metric chains
- Steel band or Band chain
- Gunter's chain or surveyors chain
- Engineers chain
- 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).
- 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.
- 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.
5. BAND CHAIN
Steel Band Chain: It consists of a ribbon of steel with bras handle at each end. It is 20 or 30 fit long and 16 mm wide. It is wound on an open steel cross or on the metal reel in a closed case. The graduations are etched as meters decimeters, centimeters on one side and 0.2 m links on the other. Brass tallies are fixed at every 5 m length of the band.
- Length = 33’, No of links = 16
- Commonly used for measuring fields in cadastral Survey.
5. BAND CHAIN
Steel Band Chain: It consists of a ribbon of steel with bras handle at each end. It is 20 or 30 fit long and 16 mm wide. It is wound on an open steel cross or on the metal reel in a closed case. The graduations are etched as meters decimeters, centimeters on one side and 0.2 m links on the other. Brass tallies are fixed at every 5 m length of the band.
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