Tacheometric surveying is a method of surveying in which the horizontal and vertical distances of relative points are determined without using any sophisticated instruments such as chain, tape, etc 5 Theodolite Surveying The theodolite is an instrument that is used to measure the horizontal and vertical angles It allows surveyors to "triangulate" the position of objects in aTriangulation is a surveying method that measures the angles in a triangle formed by three survey control points Using trigonometry and the measured length of just one side, the other distances in the triangle are calculated The shape of the triangles is important as there is a lot of inaccuracy in a long skinny triangle, but one with base angles of about 45 degrees is idealArithmetic check 1 Last RL – First RL = – = 0158 m 2 ∑BS – ∑FS = 7561 – 7719 = 0158 m 3 ∑Rise – ∑Fall = 4932 – 5090 =0158 m Hence checked Question no 3 The following readings were taken with a level and 4m staff having initial BM=100 m
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3 4 5 method in surveying
3 4 5 method in surveying-3Push the tripod legs firmly into the ground and use the central fixing screw to secure the instrument on the tripod 4Switch on the laser plummet (or, for older instruments, look through the optical plummet) and turn the footscrews so that the laser dot or the optical plummet is centred on the ground point (illustration, top right) 5Centre This 345 rule can be applied to do the layout of all types of structures like residential buildings, underground tanks, outhouses, etc If the corner of the site or plot is perpendicular to each other, you can use this method to complete the layout work All you need is a measuring tape & a lineout string
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Different methods for the calculation of Areas in the field of Surveying In this article, we will list out different methods to calculate the areas in Surveying and also study each of the method in depth We will also explain each method with a suitable example for your better understanding Here are the five importantMeasuring tape , two (2) ranging poles , pegs, and three persons ( surveyors ) are required To build square corners with the 345 rule, first measure 3 units from the corner on 1 side Turn in a perpendicular direction from the first line and measure 4 units Then, measure the diagonal between the ends of your 2 lines If it measures 5 units, your corner is square If it's less than 5 units, your corner is less than 90 degrees;
BASIC SURVEYING THEORY AND PRACTICE Ninth Ann ual Semin ar Presented by the Oregon Department of Transportation Geometronics Unit February 15th 17th, 00 Bend, Oregon Table of Contents Types of Surveys 11 Review of Basic Trigonometry 21 Distance Measuring Chaining 31 Distance Measuring Electronic Distance Meters 41 Angle Measuring 51Press ENTER to accept/confirm 4 Shift the Sprinter towards rod A, about 3 m away and make a reading to B again (this is not the order we did things above); 345 Method • AB is the chain line it is required to erect a perpendicular at C of the chain line Establish a pt D at 3 m distance 5m & 6m marks are brought to gather to form a loop The tape is stretched tight by fastening the end D and C The point D is established such that DE = 5 m and CE= 4 m and CD = 3 m and DE2 = CD2 DE2 • ie 5 2 = 3 2 4 2 = 25 thus Angle DCE
3 Aim at B and press MEAS (step 2/4) The measurement displays;Home Setting out 3 4 5 method Setting out 3 4 5 method admin No Comments Comments comments Tweet Pin It About The Author admin Visit Site Like Us on Facebook Basic Civil Engineering Search Preparing Bar schedule manualy Trusses and Types of trusses Type ofElectrical surveying • Resistivity method • Induced polarization method (IP) • Selfpotential (SP) method Higher frequency methods (electromagnetic surveys) • Electromagnetic induction methods • Ground penetrating radar (GPR)
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View Answer Discuss in Forum Workspace Report Answer Option 2 Q9 Number of links per metre length of a chain are 1 2; Calculation of Areas in Surveying Simpson's Rule In one of my previous articles, I discussed Midpoint Ordinate Rule and Average Ordinate Rule in detail with an example and listed out various important methods used for the calculation of areas in Surveying In this article, we will deal with the next important method (rule) ieUsing the 345 method for squaring corners, and a framing square will help ensure your corners are square To create corners, we use the 345 rule derived from the Pythagorean theorem of basic geometry A 2 B 2 = C 2 This means the square of the hypotenuse of a right triangle is equal to the sum of the square of both legs
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The 345 method used to set out a right angle from a certain point on the base line;2) Surveying based on Type of Instruments a) Chain Surveying Chain surveying is the basic and oldest type of surveying The principle involved in chain survey is of triangulation The area to be surveyed is divided into a number of small triangles Angles of triangles must not be less than 30 degree and greater than 1 degree Equilateral triangles are considered to be ideal triangles NoHy guysIn this video we have explain you the 3 4 5 method of surveyingThis video clearly explains you how set up right angle by 3 4 5 method with the he
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Traverse Surveying is a popular method of surveying This article includes the definition of traverse surveying along with its classification, errors in traversing, checks, the completed method of traversing and plotting of traverse survey Definition Traversing is that type of survey in which a number of connected survey lines form the framework and the directions and lengths of theThe single prismatic square and the double prismatic square used to set out both right angles and perpendicular linesGeodetic or Trigonometrical Surveying;
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1 Chain survey is the easiest and commonest method utilized in surveying exercises 2 The equipment utilized to conduct a chain survey is simple to utilize 3 The equipment utilized in the chain survey can easily be replaced 4 This method does not involve complicated mathematical computations 5 In a chain survey, a limited number ofPress ENTER to accept 1 345 method This method is used to set out a right angle from a certain point on the baseline To set out right angles in the field the;
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