Describe Different Kinds of Chains Used for Linear Measurement

Suppose it is required to measure the horizontal distance between the points A and B Fig. These types of chains comes in many lengths such as 5 10 20 and 30 meters.

Types Of Measuring Chains And Tapes In Civil Surveying Engineering

They have 100 links with talleys at every 2 m.

. By extension chainage running distance is the distance along a curved or straight survey line from a fixed commencing point as given by an odometer. Gunters chain or surveyors chain. The method consists in measuring the line in short horizontal lengths called steps.

The linear measurement is the distance between the two given points or objects. Simple rings are provided at every one meter length except wherever tallies are provided. Linear measurements in surveying can be performed by mainly three methods namely direct method electromagnetic methods and optical methods.

From A and C erect perpendicular or parallel lines AD and CE such that E D and B are in line. Metric Chains-Metric chains are generally available in length of 5 10 20 and 30 meters. Direct Method Stepping Method.

However 30 m chains are also in use. The direct and indirect methods of finding horizontal distances on sloping ground are given below. It is provided with jaws on one side for.

A Select two points A and B on the chain line on opposite banks of the river. Metric chains are made in lengths 20m and 30m. Depending upon the length of the chain these are divide into following types Metric chains.

Commonly used metric chains are of 20 m length. Following are the various types of chain in common use in surveying. Taking accurate measurements is one of the most important tasks a land surveyor must complete.

Method of preparing a plan using only linear measurements is by conducting chain surveying. All the three types are made with one scale on the front of the beam for direct reading. Metric chains Metric chains are the most commonly used chain in India.

This video gives an introduction to linear measurements and types of chains and tapes. Steel band or Band chain. Tallies are fixed at every five-meter length and brass rings are provided at every meter length except where tallies are.

Gunters chain or surveyors chain. Measuring the length of a banana using tape. 21 Methods of Linear Measurements.

The direct method is the common method that employs a chain tape or any other instrument to measure the linear distance. Instruments Used in Chaining Günters chain A 66 feet long chain consists of 100 links each of 066 ft it is known as Gunters Chain Here 10 sq chain are equal to 1 acre 10 chains 1 furlong and 8 furlongs 1 mile This chain is suitable for taking length in miles and areas in acres. The chain is a unit of length equal to 66 feet 22 yardsIt is subdivided into 100 links or 4 rodsThere are 10 chains in a furlong and 80 chains in one statute mile.

The length approximates to 5 inches. In metric terms it is 201168 m long. Any one of the following methods may be employed to find the width of the river along the direction of the chain line.

Measure AC AD and CE. Types of Chains Used in Surveying. Gunters Chain or surveyors Chain.

Below is a summary of eight different types of surveying equipment and their uses. This method is also explained in this chapter and Indian Standard Conventions for showing objects on the map are presented at the end of the chapter. Length of each link is 03 m.

- Electromagnetic Methods in Surveying. The total length of chain is marked on the brass handle. Each link is of 02 m length.

Steel Band or Band Chain. There is a variety of tools that can be used to take measurements including tapes rulers chains and laser devices. Total gap measured between the leftmost and rightmost end of an object in the mentioned system of units.

Similarly height is the linear. Vernier has jaws on both sides for external and internal measurements and a blade for depth measurement. Thus we can define length as.

Steel band or Band chain. 22 Instruments used in Chaining.

Types Of Measuring Chains And Tapes In Civil Surveying Engineering

Instruments Used For Chain Surveying

Different Types Of Chains Used In Chain Surveying