Chain surveying instruments used in chaining engineering basic. Instruments used in chain surveying iamcivilengineer. Enumerate the instruments used for measurement of lengths of survey lines. For less precise works chain is used whereas, for more accurate and precise work other types of surveys are used. With modern surveying instruments, survey work will be precise, faster and less tedious. The various instruments used in chain surveying are as follows. Instruments used for chain surveying principle of chain surveying, advantages and disadvantages of chain surveying advantages. Chain surveying it is the simplest and oldest form of land surveying of an area using linear measurements only. Following are the modern surveying instruments which are used for surveying. Do not set an instrument in front of or behind a vehicle or equipment that is likely to move. The following instruments are required for measurements with chain and tape.
Instrument used for chain surveying polytechnic hub. Instruments used in chain survey chain, 20m or 30m long tape arrows ranging rods wooden or iron pegs plumb bob cross staff chain used for surveying 20m chain 100 links 30m chain 150 links 1 links 20cm links of chain are made by mild steel wire 4mm diameter. Types of chains used in surveying, their parts, testing and advantages. Surveying is classified based on various criteria including the instruments used, purpose, the area surveyed and the method used. The various instrument used for the determination of the length of the line by chaining are as follows. Chain surveying, it is a method of surveying in which no angles are measured but only linear measurement is taken in the field by using a chain or tape measure. Click on the button below to get the pdf file and read offline. Types of chains used in surveying, their parts, testing and.
What are the instruments used for a chain surveying. Principle of chain surveying, advantages and disadvantages of. Wooden pegs are used in measuring a length of a line to mark the end points of the line. Chapter 3 surveying equipment, measurements and errors. It can be defined as the process of taking direct measurement, although not. As you are about to execute chain surveying so chain is the requisite tool that is a must. Modern surveying instruments and their uses in civil. In cold or hot weather when vehicle climate controls are used, survey instruments should be acclimated to outside conditions for an adequate period of time prior to final setup adjustments. Ranging rods are used to range some intermediate points in the survey line the length of the ranging rod is either 2m or 3m. What are the instruments used for a chain surveying survey.
There are different types of chains that are used in chain surveying all of these are also enlisted. It measures a series of straight lines on the ground with a chain or tape measure and all fixed points relative to the line of traverse either by right angles offsets or tie lines. What is chain surveying part 1 ssc je preparation 2018. Surveying is an art of determining the relative positions of various points on, above or below.