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.
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SOLVE FOR THE CLOSED TRAVERSE SURVEYING (Real Life Site Construction Calculation)
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Traverse surveying problem and solution.
Traverse surveying problems and solutions.
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Advantages and disadvantages of traverse surveying
Types of Traverse in surveying
Closed traverse surveying procedures
Traverse surveying calculations
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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
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CALCULUS VIDEOS:
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BASIC CONSTRUCTION ELEMENTS VIDEOS:
• BASIC CONSTRUCTION ELE...
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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.

[@lewismirie7083]

30 mins video just summarised my whole semester.

[@collinsenoma3670]

Same here

[@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

[@ochiengquinter6048]

Thanks for the video from Kenya 🇰🇪

[@nnlm7719]

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

[@phillipallsopp4376]

This is a great video. Very very easy to follow

[@swirl._.3]

so much knowledge packed in this video

[@mistajay9017]

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.

[@mqadi1682]

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

[@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 👏👏

[@TheRealAtomeec55.]

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

[@agneswambui6455]

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

[@DominoCreek]

Thank you Kelvin

[@user-bz3nq1cy5x]

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

[@allensibanda6930]

I respect this man thank you so much

[@kingolympio8688]

You really took your time to explain the concept

[@yonasgebeyehu9880]

This is really the nice class which I ever get in surveying, Thanks man! In the future, I expect a lot!

[@TinasheTimer]

Yes sir u explained much better

[@gynieeditz5681]

Tq from Malaysia🇲🇾🇲🇾

[@meticangu9106]

Very explicite and elaborative thank u sir

[@CorneliusMadikizela-em5ih]

Thankyou Sir Watching from South Africa.

[@otiale1392]

Very best lecture... God bless you, impressive ❤

[@okoroafordave9329]

made it look so easy, grateful sir🙏

[@user-si4pf6up1s]

best tutorial ever.thank you

[@relaxedxlntsounds8361]

this video is just superb!

[@siyabonga2179]

That is a very nice explanation, Sir. Very Informative🔥

[@tulipohambawerniza4245]

Very helpful and educative too.. God bless and much love from Namibia

[@kerenkanzemwarabu]

May God bless you abundantly !!! this video is simple to understand and it's a dime

[@collinsenoma3670]

Thank You Sir This was a very helpful lecture God Bless You

[@pentarlearsi1446]

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

[@aarhin919]

best tutor . God bless you. your lecturing help me. i wish am close to you. by the way please load more videos on surveying for me especially basic level. because am beginner

[@saiduakonneh889]

This site is very amazing and is helping cleared most of us doubt with respect to site surveying and congratulation for this knowledge shearing program. Regarding the first step for the last level calculation, please note that the reduce level is 86.846 instead of 88.846.

[@menzinkosi3425]

Thank you brother , this is very helpful 🙏🏽🙏🏽🙏🏽🙏🏽🙏🏽🙏🏽

[@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

[@user-fe7co1ty5p]

Thankyou so much sir,, watching from Kenya

[@UwakmfonEyo-hb8k]

You are doing great keep up

[@hlalelemohale7296]

Thanks you saved me my brother, am a teacher!😊

[@JesseyMulbah]

I love your teaching

[@joelobeng5471]

You helped me 🙏🏿🙏🏿🙏🏿🙏🏿🙏🏿

[@user-qx3iw3oq9l]

Thanks Kelvin❤

[@albaaqiy1160]

Thanks Thanks Sir what a excellent program, that's clear my concept absolutely again thanks.

[@shylinemutasa2454]

Yu rlly took your time to explain ..thnks brother

[@mustaphaceesay6792]

Well explained thank you sir 🙏 👏

[@makafuivictory6500]

Thank you sir, ❤

[@ebitegift8300]

Thank you sir. Very helpful

[@brightmutoti3828]

This is great work Sir

[@IanTours-om4rw]

Well explained. Thanks watching from my home country vanuatu

[@mercynkya3731]

This help me alot Thank You🙏🙏

[@timothyoyidi4161]

This was very helpful Definitely giving it a like

[@suzzetserede]

Thank you so much sir ✌️✌️

[@richards_greatman]

Thank you so much for this value sir. My exams is for today and you really made me ready.

[@ElyseMugisha-uy7et]

Thanks teacher

[@kofipeter6471]

Very very good continue boss

[@manuel07385]

Thank you sir

[@user-ws5zk9pq9m]

Sooo great a lecture

[@mujuniwycliff8501]

Thanks so much 🙏 💓 brother

[@user-yh7nh6bw7f]

Explanation is ok

[@mcebotsabedze9848]

what a nice lesson

[@asayilethindwa3209]

You are my favorite man 🎉❤

[@meitei-M-Ngm]

Thank You

[@karabosekele6732]

Thank you

[@armstrongdoeansu5249]

excellent explanation. please add the adjustment and misclosure

[@justfaith495]

thought this was rocket science until now. thank you

[@samueloluwatobi4378]

Thank you sir 🙏

[@BelindaNsiah]

Wow you are special ❤

[@titusblair7533]

You just gave me an A in surveying

[@Geffajji]

Thanks 🙏

[@MudahigwaRonny-qr4du]

Very Gud thanks

[@napomokhethi7818]

Thank u, even my foreman couldn't explain

[@jamesvosena1931]

thanks

[@hankohanko2943]

ty from sudan

[@melvintonde3678]

You are good😊

[@MubarakIbrahim-yr6mx]

I want this lecture

[@ochiengquinter6048]

Curve ranging in the field plus calculation please 🙏

[@ericklele]

Very good I want to know why do you get that obm number

[@ravirajesh9232]

Nice

[@TinasheTimer]

Good sìr

[@bensonsandy2118]

Please do a video on open traverse calculations😢

[@murangiramaxima1332]

What is the difference while using Dumpy level?

[@a1_ricki]

Bless

[@zoehargreaves8442]

💪

[@biliameensuleiman9006]

Thank you sir Got d gist behind it But my problem is how can we apply this onsite sir

[@KelvinAcademyYouTube]

I will explain in another video.

[@allankara2212]

whole semester work in 30 mins

[@user-sd1qw8xh5f]

Good morning. Please what if you are on a site where there's no building in the surrounding to locate the benchmark

[@KelvinAcademyYouTube]

Talk to a practicing surveyor in the area, or visit the engineering survey office of your local council. If there are no national established control points, then there will be Temporal Benchmarks or some sort of recognized secondary or tertiary control networks.

[@reaganbtw8771]

gold

[@robertsisco6040]

mazee barikiwa

[@albaaqiy1160]

Plz Plz TOTAL STATION ALSO START FOR OUR TEACHING, I NEED IT URGENTLY.

[@patrickessel3891]

please to have complete videos for beginners' i mean level 100 students cause i dont understand what what lecture is teaching so if you have please leave link behind

[@josephsichamba-ts1lv]

It has been a year but am seeing the video for first time, are you still doing or stopped

[@KelvinAcademyYouTube]

The channel is active

[@user-qs7tm7iz4s]

How do you get 86.452 from subtracting 0.394 from 88.846?

[@user-qs7tm7iz4s]

Actually that 88.846 should've been 86.846

[@shalommainuka5190]

There's architects too you know

[@afiaampomaasarkodie3710]

Please you didn’t show the unadjusted RL

[@jacobkumai7013]

Your first RL and last RL is same, so that means you close your observation at OBM. Your Label must be same!

[@KelvinAcademyYouTube]

Absolutely Jacob.

[@isaacchiagozie9648]

How do you mean please

[@KelvinAcademyYouTube]

@@isaacchiagozie9648 I ended the reduced levelling (RL) task at the same Ordinance Benchmark (OBM) [primary control point] station where I started transferring levels on the site ground. You can also start off from a Temporary Benchmark (TBM) [secondary or tertiary control point] station. If I had ended at a different station, I should be getting a value less than or greater than 0.000 in my final checks. But no matter how you ended your RL on that site, if you have carried out your levelling observations accurately, the final check should definitely be fine. I hope this helps. I will be making more videos on this and more subjects.

[@user-mu1sy1ow4u]

Bode plots

[@KelvinAcademyYouTube]

Are you an electrical or electronic engineer? I have some video series coming out soon.

[@elizabethachieng3933]

Thank you

[@timothyoyidi4161]

This was very helpful Definitely giving it a like