Types of Chains and Tapes in Civil Surveying Engineering

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). 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 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