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How to Calculate Height of Collimation (HOC) & Rise and Fall Methods for Site Engineering Surveying

Kelvin Academy 164,316 3 years ago
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Site engineering involves using various instruments and methods to prepare the construction site for the substructures or for the superstructure. A lot of tasks must be completed before other construction professionals can carry out their specific roles on that site. At times, an architect will want the land surveyor to complete their tasks before they can fully develop their own architectural plans for the project. During the construction phase, the surveyor is usually required on site to check and ensure that both the horizontal and vertical level are accurately constructed with negligible deflections form the accurate plan. In this video, I will walk you through how to collect field data to check for site levels using Height of Collimation method and Rise and Fall method commonly used in site engineering and surveying. In subsequent videos, we are going to understand other applications of using the Auto Level instrument on construction sites. Video Timeline Guide: 00:00 Introduction. 00:31 Surveying field book table for recording. 00:38 Table difference between HOC and Rise and Fall. 00:53 The instrument needed for the levelling (Auto Level). 01:02 The difference between Auto level and dumpy level. 01:10 Auto level, surveying tripod stand, survey levelling staff or rod. 01:30 Plumb bob in surveying (what it's used for). 01:55 What is surveying benchmark (How to identify site benchmark). 02:44 GPS and GIS with site benchmark. 03:23 How to record surveying field data. 03:27 How to record the benchmark values on table. 03:43 What is Backsight in surveying and how to record backsight. 04:31 What is Intersight (intermediate sight) in surveying and how to record intersight. 05:30 What is a foresight and how to record foresight. 09:42 How to read the cross hair in surveying. 10:38 Staff or rod movements and points to measure. 10:53 Manhole, marked points on site, curbs, gutters, permanent site structures, etc. 11:59 Foundation setting out with theodolite, total station or measuring tape. 12:11 Difference between a total station and a theodolite. 12:20 Purpose of levelling in surveying. 12:50 How to calculate levels using height of collimation. 19:33 How to check for Height of Collimation with formulas. 19:43 Sum of backsight and foresight. 20:15 Last reduced level minus first reduced level. 22:51 How to calculate levels using Rise and Fall methods. 31:13 Formulas for checking the accuracy of rise and fall in surveying. 34:31 Conclusion of Height of Collimation and Rise and Fall surveying. #kelvinAcademySiteEngineeringSurveying #kelvinAcademy #kelvinAcademyVideos Almost all surveying requires some calculations to reduce measurements into a more useful form for determining distance, earthwork volumes, land areas, etc. Purpose of traverse: It is a convenient, rapid method for establishing horizontal control particularly when the lines of sights are short. Introduction to traverse surveying Traverse calculation question Basic explanation Solution to the traverse surveying question SOLVE FOR THE CLOSED TRAVERSE SURVEYING (Real Life Site Construction Calculation) Traverse surveying procedure. Closed traverse surveying calculation. Closed and open traverse surveying. Traverse surveying problem and solution. Traverse surveying problems and solutions. What is traverse in surveying Advantages and disadvantages of traverse surveying Types of Traverse in surveying Closed traverse surveying procedures Traverse surveying calculations Surveying traverse traverse surveying procedure pdf traverse surveying procedure Surveying traverse pdf traverse surveying ppt traverse surveying meaning open traverse Traverse calculation Traverse calculations Traverse calculations pdf Height of Collimation (HOC) Surveying Rise and Fall Method Surveying Tripod surveying Automatic level surveying Auto Level surveying site engineering surveying Staff surveying Rod surveying Spirit level bubble Linear measurement surveying Chainage surveying Run measurement surveying CALCULUS VIDEOS: https://www.youtube.com/playlist?list=PLGiODXzBccMbZQNLSoBZk3PnalW2tnqxz BASIC CONSTRUCTION ELEMENTS VIDEOS: https://www.youtube.com/playlist?list=PLGiODXzBccMbKP_2ptBBd-tXqwNEr2rBa kelvin academy, kelvin academy YouTube, kelvin Nwoha, height of collimation, rise and fall method, back sight, backsight, fore sight, foresight, backsight and foresight in surveying, backsight in total station, auto level survey, auto level instrument, total station, auto level training, how to calculate height of collimation, how to calculate rise and fall, applications of the auto level surveying, formulas to check for height of collimation, formulas to check for rise and fall accuracy, intersight, inter sight, intermediate sight, what is back sight, what is backsight, what is intersight, what is foresight, what is inter sight, what is fore sight, how to use an auto level surveying, land surveying, land surveyor

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