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Types of chain - Metric chain
Unit 1- Surveying
Chaining: Instruments used for chaining
Types of chain
Metric chain
Metric chains are commonly used in now a days. Metric chains are generally available in lengths of 5, 10, 20 and 30 m. To enable the reading of fractions of a chain without much difficulty, tallies are fixed at every meter length for chains of 5 and 10 m length. Tallies are provided at every 5 m length, for the chain of 20 and 30 m length. Small brass rings are provided at every meter length. To facilitate holding of arrows in position with the handle of the chain, a groove is cut on the outside surface of the handle. The tallies used for making distances in the metric chains are marked with the letters “m” in order to distinguish them from non metric chains.
Types of chain
Metric chain
Metric chains are commonly used in now a days. Metric chains are generally available in lengths of 5, 10, 20 and 30 m. To enable the reading of fractions of a chain without much difficulty, tallies are fixed at every meter length for chains of 5 and 10 m length. Tallies are provided at every 5 m length, for the chain of 20 and 30 m length. Small brass rings are provided at every meter length. To facilitate holding of arrows in position with the handle of the chain, a groove is cut on the outside surface of the handle. The tallies used for making distances in the metric chains are marked with the letters “m” in order to distinguish them from non metric chains.
Last modified: Thursday, 21 April 2011, 9:20 AM