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

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
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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:

BASIC CONSTRUCTION ELEMENTS VIDEOS:

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[KelvinAcademyYouTube]

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.

[lewismirie]

30 mins video just summarised my whole semester.

[timatata]

This video was made for people like me with no background. Sir i really do appreciate mostly on how to read the staff and filling the table. May God continue to lift you up

[Mz-laughter]

I wish I saw this earlier before my semester, very understandable

[mistajay]

Hi Kelvin. This video "saved my life". I last did this at university almost 20 years ago and I am teaching this course to Architecture Technology students this year. You can imagine! Thank you very much. Your illustrations are clear and straight forward.

[cmscliff]

Watching from Zambia is video just made me understand the explanation that a so call land surveyor lecture here explained for 2hrs and yet no one understood 😅. Thank you 👏👏

[mqadi]

I think you should register your institution sir where it will take us 2 months to get our tutor ever🎉

[agneswambui]

Watching from Kenya....the best tutor ever....

[FARAHACEN]

Hey you are saving my semester sir.thank you

[maireboy]

Thanks for this video. I went in circles trying to understand this concept, and you did such a good job of breaking down in this video.

[nnlm]

Something I couldn't understand for years, just became simple in Thank you

[ianoloya]

I am just ready for my papers now. thanks!

[IsaacOngaro]

Good for me as a young surveyor of tomorrow
May God bless you inmost

[pulikasapha]

This is the best tutorial on YouTube 🥳 well explained

[MocirukuMary]

Jus ready for my exam it really what am looking for

[TheRealAtomeec.]

The best Tutorial I ever found..Frr🎉🔥🙌😊 Thanks Bro.

[Panther-]

Wow thank you brother...this was the best explanation I saw so far.I feel its a concept which requires a thorough explanation.And even nearly all videos I saw did not explain what these headers like Fs Hoc and Rl mean in detail thanks

[pentarlearsi]

How I understood this I even don't know .. God bless you so much sir

[MichaelNeatis-im]

Really useful, informative and well delivered. I was searching for a video on this subject and Kelvin covered it all excellently. Thanks.

[dooshimaaguh]

This video proudly gave me an "A" for d second time. 😅😅 Tank u Kelvin