Welding, Lapping, Coupling of Reinforcement in Column and Slab - Which is Best

What To do if Lap in Column Comes in Zone A
• What To do if Lap in ...
Which Bar should be Staggered during lapping in Column? | Upper or Lower
• Which Bar should be JO...
Reinforcement lapping Zone as per IS Code 13920 in Column
• Reinforcement lapping ...
In this video, I am going to teach you Welding, Lapping, Coupling of Reinforcement in Column and Slab - Which is Best
#CivilEngineering #Welding #Lapping #Couplor #Reinforcement #Column #Slab #HouseConstruction #LearningTechnology
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✔L & T - Learning Technology: This channel contains Technical Lectures on "Civil Engineering Topics like BBS (Bar Bending Schedule), Quantity Estimate, Rate Analysis, Surveying, Billing Estimate, House Construction, Civil Engineering Interview Question and Answer, Civil Site Related Videos, How to Read Civil Engineering Drawing, Building Estimate, Metro Rail Construction, Basic Civil Engineering Knowledge, Civil Engineering Softwares " from Personal Field Experience by Civil Engineer Mukesh Sah.
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Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing.

[@Ameetk369]

sach me mahesh bhai apke jaisa detail me koi nahi samjhata youtube pe... kyunki bahot sare log hai jo chanel chalate hai lekin itna detail me koi nahi jata... bahot log sirf basic me ya defination me lipta dete hai magar apki video sab ke liye sikhne jaisi hoti hai... mai har video dekhta hoon aur samajhta hoon... kyuki mai infra me kam karta ho to mujhe bhi kayi sari problems aati hai magar apke video se problem solve hoti hai... so pls keep doin these videos ... makn ek suggestion dena chahunga ke ho sake to residential ke sath me infra ke components ke upar bhi video banayiye bahot acha hoga...👍👍👍👍

[@rajendrakalura.8770]

सर जी नमस्ते, बहुत ही अच्छी जानकारी दी है आपने, पहली बार ये कपलर मेथड के बारे में पता लगा है, और ये भी पता लगा है वेल्डिंग नुकसान दायक हो सकता है भले ही दिखने में मजबूत हो

[@SohanLal-ci3gx]

Overlapping provides proper compressive strength in vertical members if laping length is proper.Coupler joints make members in situation but not stand for strength , rebar and coupler bonding may not yield.

[@k.p.s.1959]

बहुत सुंदर जानकारी :- सकलानी बिल्डिंग कन्स्ट्रक्शन

[@sampathr2]

Really wonderful explanation. For a layman like me, it is explained in simple and short. Tks for sharing.

[@rahibulhoque4397]

Rahibul

[@nayanjyotisaharia7420]

Very Informative Video Sir...Thnxx For The Knowledge....Hamara Ghar Banane Ki Baat Chal raha Hai...Yeh Video Bahut Helpful hoga mere liye

[@skumar1014]

In your next video- 1. Explain cost advantages of handling of heavier bars due to lapping, cost of additional handling due to threading machine. 2. Cost of threading machine, Cost of threading per bar and productivity of machine 3. Labour cost savings if couplers are used

[@dipalmehta4313]

Also cost of testing 😂

[@dattumhatre5772]

हमको पहली बार यह जानकारी मालुम हुई. धन्यवाद. कुछ सवाल, १) बारमे थ्रेडींग करनेका तरीका क्या है? २)अक्सर आखरी फ्लोरतक जाते बार कम साइजके होते जाते है. इसकेलीये रिड्युसर उपलब्ध है? ३) ये मार्केटमे असानीसे उपलब्ध है? ४) ये मान्यता प्राप्त है? कृयया जानकारीकी क्लीप बनाकर लोड करे.

[@sanjaysrivastav3333]

Lapping is best. Coupling is very careful work and it needs skilled worker and sincere supervision. Needs threading which will take extra cost. So work may be delayed. More need of coupling is best for complete load transfer without eccentricity.

[@ManishPuri]

Good information bro

[@pravinshaha5475]

Coupling is the best 👍 as per my 45 years experience in Mega Engineering Structure Pravin Shaha, Chartered Engineer and Government Approved Valuers

[@raghubanshprajapati5307]

@SP CREATION'S kitna price hota

[@nagaraj5338]

Good innovation by using cupling method, super saver

[@ankurbhaker786]

Precautions while using couplers: • The threads that are being developed on rebars by automatic threading machine must be observed that their length should be appropriate i.e. if the length of rebar coupler is 90 mm so the length of threads should be 45 mm in case of type-1 couplers. For inspection we must deploy an inspector at the steel yard whose duty should be just to inspect the length of the threads in lot of reinforcement before dispatching to the site for installation. • In case of type-1 threaded couplers, the inner threads must be made with a die instead of a lathe as the depth of the cut can be varied by later type of production. • The Contractor may try to hide the excessive threaded portion length on rebar by unacceptable means. Like in one instance, a contractor tried to use cutting disk to grind the excessive threaded portion and then after application of oil used sand to hide the shiny surface. So while inspecting the couplers the excessive length of couplers must be demotivated. • For the quality of reinforcement production at steel yard a full time QC practitioner should be deputed with sufficient experience in terms of reinforcement production for mechanical splices. • The Contractor must evaluate the quotations from different suppliers in terms of cost, quality and timely supply of the product. The approval is granted by the Engineer by thoroughly going through the technical performance certificates or test documentation commenting on the couplers. • The reinforcement bars must be cut by rotatory saw instead of cropping machine. The use of cropping machine results in an inclined end instead of being 90 degree cut therefore in order to engage fully the length of splice coupler the cut angle must be 90 degrees. • For lubrication in the automatic threading machine, only approved lube should be used and no cheap products or water should be used whatsoever. The quality of lubricant would have direct impact on the thread cut otherwise they would be damaged and would be irregular which not a good practice is. • The threads produced on the reinforcing bar must be checked in terms of pitch depth and accuracy. Pitch measuring tool or any other suitable tool might help in determination of suitability of the produced thread.

[@Vamshi-k]

Io

[@engr.asadallahrakha8738]

Bro if we have to maintain so much things then lapping is best😂

[@er.gurlabhsinghgill8254]

Best explained....please suggest some references to authentic literature/code for future implementations...thanks

[@shreekanthraja1133]

Thks a lot for sharing your experience and me too like you at work place very sincerely as the way you explain above

[@rohandoon1235]

Can we contact you

[@suryakumar3380]

Sir column 9×12 inches ka column hai jise me 12 mm & 16 mm ka tmt rod hai to Coupling used ker skte hai ...

[@rahilshaikh439]

Sir cupling best option hain you right and thanks

[@VinayKumar-kr8ne]

Hello sir Agar hum slab ke sath hi lap dety hai column ke liye ? Please suggest wo shi hai ya nhi First floor ke baad humare column ka steel enough nhi tha isly slab ke sath hi column ready kar diye hai

[@LearningCivilTechnology]

Sahi nahi hain

[@villapusa4825]

Couplers are the best regarding strength, serviceability, ductility, and stiffness. Past research also shows that the stiffness of the coupler splicing region is even HIGHER than that of a continuous reinforcement due to the cross-section enlargement at the coupler location.

[@aucky6726]

Sir, 2 doubts h mere 1.coupler k case me lapping zone ka issue rahta h kya? 2.Kisi column k sabhi bars ko hum ek hi location pe coupler se joint kr skte h kya ?

[@aishyadavvideos]

Always explain in a good manner .

[@mokbulhossain5926]

ঈশ্বর ঈশ্বরকে,

[@lovekeshsanwriya4597]

वा भाई ...भाई ने कुछ नया किया 👍👍👍

[@shyamchaudhary.3359]

We are using lapping , in coupler use less steel but lapping is best, more stronger than coupler....

[@civilengnepal]

learn everyday ! very good content sirji !

[@mr.moktanvlog2753]

Over lapping is commonly used in building construction. So in my opinion lapping is best to transfer the load one bar to another bar

[@Ranjeetkachhwaha]

First time see its important video Thanx Sir

[@maheshj660]

Sir , In case coupler joint came in beam junction or slab area is technically wrong ???

[@lotsofgaming9207]

Sir very useful good information

[@manits3547]

Welding is acceptable with both sides welded in double layers duly chipped of. In this case the overlap will be normally 10 X Dia. of Bar or as per Designer's specification. The Weld is further subjected NDT / X-RAY confirmation for perfect welding. But Weldind is not unacceptable under any circumstances.

[@badrealam1340]

Can I use copler in 12mm bar or laping.wich is best 12mm bar for horigental joint.

[@LearningCivilTechnology]

Lap

[@kanhaiyakumar-ur7rc]

Very very important video sir❤️

[@nirjhesh_vlogie]

Lapping or coupling bar me same level par lagana hai, ya different level par. Kaun sa better durability dega.

[@ajayhaldwani5850]

Coupling available hai market main sir best idea coupling

[@rameshwarbeldar3534]

अप्रतिम माहिती सर 🌷🌹🙏🙏

[@saileshsingh1]

You always bring practical and great topic! Thank you from Bottom of my heart.. Can you plz bring something on topic FAR.. Jaye Krishna Janma Asthami! Thank You. Shailesh Singh

[@LearningCivilTechnology]

Sure... Jai Shree Krishna

[@shaktimandalofficial]

Kya 9*9 column mein 2 bar laping aur 2 bar coupling kr skte hain(16mm bar)?

[@borntoride2209]

nice video brother good coupling is also good it reduces cost but i cant feel safe

[@chttaranjansarkar4098]

Lapping ache

[@prabhakarwankhade4577]

hello sir . this is Pankaj wankhade . mera ek Q.hai Gaon me kharcha kam karne ke liye half column lete hai , man lo foundation se leke 8 feet tak,( 4 feet foundation and 4 feet ground level se uper.) fir brick work continued krke uske uper slab dal dete hai . to sir kya aisa krna sahi hai ?. aur aisa krte hai to kya problems aa askte hai .?

[@borntoride2209]

lapping is best because cost is not important than life of people.. lapping has given instructions in is codes 50d for slab , 24 to 40 d for coloumn , for beam tension 45d, compression 24d and the distance center to center of lapping length should be 1.3 times of lapp length

[@esportzgaming1140]

More than 36 mm ?

[@Merabharat9254]

Very nice technique

[@prabujayk]

daily I am watching your videos. I learned lot of information in your chanel. In this video Can u please explain how we can threading for tmt steel ? Threaded steel Is readily available in market with coupling?

[@wajid699]

We always do lapping..coupling to pehle bar suna hai...fir bhi good video sir

[@ImranSharif-z3t]

he said lapping is ok till M16 ABOVE M16 BETTER USE COUPLER, WELDING IS NOT GOOD FOR ANY CONDITION. THANKS

[@janardhanreddybanala3778]

Vertical bars coupling is ok what about horizontal bars coupling is acceptable or not ?

[@vijaykumhar9403]

Good question

[@Amit-yb4sd]

Sir for horizontal joints lapping is recommended

[@janardhanreddybanala3778]

Amit thank you 🙏🏻

[@Amit-yb4sd]

@@janardhanreddybanala3778 sir lapping for horizontal bars can be done only in columns, other than column, lapping cannot be done in the middle of the beams, so couplers dont work ...

[@brijeshsharma4325]

Yes gud question

[@sachinpanchal8190]

Very good information sir

[@RNGunding]

Very informative. Thanks.

[@londonoxfordstreet]

Boy, You are Excellent!

[@AmanKumar-sf8it]

WONDERFUL EXPLANATION

[@jaydevmandal4416]

Coupling is best

[@RizwanKhan-we9rr]

Yes sir coupling is very best option

[@Boss-gk8kc]

Hi I really enjoy your videos. You explain things very well. I have a question; what if lapping method is used but the bar is not bent to make stagger ie it’s just joined straight , is that safe? Is it ok according to IS code ?

[@rahulbadgandi]

No boss

[@KaushalKaushal-wu9lb]

Popular ek hi Jagah joint Hota Hai

[@vijayrao5281]

I have a problem, we have a house where the column rods have been protruding from the roof for over 16years now we plan on construction of 2nd floor. Problem is one of the rod coming from the roof is cut and for that section can we do coupling , the bar dia is 16mm

[@millokimay3962]

Same here....I am too searching for this solution. Request,bro if U find some solution plz let me know.

[@rurutarkar8203]

क्या सभी साइज की स्टील मैं कपलर use kr सकते है ????

[@motipatel615]

Wah news great job sir....

[@SohanLal-ci3gx]

Only over lapping is effective.other aulternates like welding , coupling,the vertcal element(column) may shear up, horizontal element( beam) may effect tensile strength as well as compressive strength.

[@abdulmahboob3612]

Achcha vedio apne banaya bai .bohth impotan apnne pathaya . Sukriya .

[@rsd6317]

Coupling- Cost of making threads ? How far it is economical and practical?

[@LearningCivilTechnology]

Soon video will come

[@AbidMehmood-ib1qs]

G+2 two main coupling use kr sakty hn ?

[@zohebimran7593]

To use couplers,rebar should be forging and treading. For basic couplers, its 2 type of treading half length of couplers tread in rebar its called type A. Full length of couplers treading in rebar its called type B. Type A for vertical bars n B is for horizontal bars.

[@ak_homes_design]

Useful Video Sir .......

[@virandergoswami1811]

What if dia of same vertical bar is to be reduced in case of columns for upper storeys....will coupling work?

[@LearningCivilTechnology]

Yes

[@khajaismailmohiuddin2925]

@@LearningCivilTechnology but it is very complicated and difficult task to make threading for both Lower and upper bars.what is the solution?

[@bk.gyanesh2553]

Very very nice information thank you sir ji 🙏🙏🙏🙏🙏🙏

[@mukuljha804]

GREAT INFORMATION.THANK YOU SIR JI.

[@HND5558]

Very good explanation

[@taringsanjay9846]

Make a vedio on estimated comparison on this top

[@LearningCivilTechnology]

Video banaya hua hain

[@deepakedition5259]

Sir 1200sqft ka ghar Mai 12mm to16 mm Mai coupling use kar sakte h .aur kya couplers ka quality aur brand kaise check karna hai !

[@jaimabharti9182]

Lapping is best.

[@rai_vloger5290]

Tab shyad apne video nhi dekha

[@aamirthesinger0007]

It depends

[@basimmohammad5299]

Upto 36dia

[@vertexmalakar]

Tino best hain bash sahi jagah sahi terike se karna chahiye

[@biswapramanik221]

I love you sir ji ❤️ important education

[@SaiGaneshS3]

What is the market of rebar couplers looking like? How much percentage of total rebars volume are threaded rebars?

[@abhikhatri5414]

Coupling is recommended for column and lapping is recommended for beam but not coupling and also welding is not recommended for either of ...

[@adriandungdung2316]

Sir reducer coupling 12 and 10 mm ka available hota hai kya?

[@subhamkundu620]

Really good explanation sir, I liked it. But I had a question that does coupler is a good option in terms of stability of the suructure.

[@pynzkurbz3796]

I don't think so

[@nanduxyz6169]

leping is tha best option 👌👌👌👌

[@saawan10]

Informative. Thanks

[@karthikgowda3530]

High pressure gas welding is the best and cost-efficient

[@VikasPandeyEClasses]

Sir kya purane ghar ko aur upar uthana hua to 10 mm ke rod me coupler use karana chahata hun. Kyo ki rod jyda bahar nahi hai. To kya ye sahi hoga.

[@sonushahjahan5446]

Dear Sir 1 Question hai Sir Difference between Pile Foundation And Raft Foundation 2. Question. Pile Foundation And Raft Foundation which Area me karte hai. Please sir Give me Ans.

[@vikashkumargupta3955]

Q1) pile fondation:- below the ground level and used in breeze but Raft or mat foundation both are same used in appartments.it is generally used in that area where soil strata has low bearing capacity.

[@yuvrajsapra9737]

Hello Sir Thankyou For The Information Sir I Need Your Help Sir I want To buy That Coupler I Am unable To Find That Coupler

[@raushankumarjaisiriram8188]

सर रड में गुना के लिए बताएं,,👍👍

[@FilmiBate_2.1]

गुना मतलब ??

[@2021coder]

Sir agar lapping karne k baad welding kare to sahi rahega? Please reply 🙏🙏🙏🙏

[@yashaggarwal7105]

Coupling may be good for column/pillar but not for horizontal beams

[@travelguide786]

Correct

[@sameerbabu1856]

Very good video Sir

[@henrykharnaior5786]

Lapping is the best coZ we are in the quake zone 🙏🙏🙏🙏coupling is dangerous

[@अजयकुमार-झ7फ4ल]

.

[@pawanvishwakarma5128]

Kya Linter aur beem me bhi cupler use kar sakte hai, cupler village area me abhi nahi mil pata to aisi setutaion me kya kare.

[@borntolive2097]

Very informative video..will wait for your next video of price comparison between using couplers and providing lapping length for higher diameter steel

[@sanmukhchauhan1668]

Very good idea bhai

[@samj923]

Welding in image is worst and wrong construction.. Lapping is the correct procedure to increase height

[@zaidali7934]

Coupler k case ma jis point py coupler use ho ga.. Wo point steel ki elasticity ko effect nahi kary ga kia.?????? Is k elawa coupler k skilled labour b required ho ge....

[@faheemahmad945]

I hope lapping is best for safety

[@jesterviegas556]

Nice Explanation

[@Tour_and_Knowledges]

For couple we need to get rod threaded that can also increase cost

[@asuwish8300]

And also take time.

[@md.suponmiah1508]

Sir want know from you, columns vertical reinforcement bar lapping area we make without stagger where are two bar end to end putting on top and 50D length extra Piece tying parallel the joined area by wire it's okay for 5 storied buildings ?? Bar Dia is 20mm and 16 mm .

[@vikrantchaudhary1214]

Please make a presentation on Threaded Rebar. Mostly used by developed countries. These rebars does not require any add on upsetting and threading. Only require couplers and locking nuts.

[@nitinkale8382]

Ring information sir

[@shahidulislamshumon4383]

Thank you. I want to know about DPC. Please do a video on DPC.

[@purnasinghthapa6645]

Sir!coupling system is available in Nepal?If it is not available what is the proper way to get in Nepal?And what´s about the price?

[@manasmohanta7355]

Drawback in coupling is to makeing thread on steel bar in leathe which is costly

[@newvideohub2837]

Sir rare case me overlap kitna hona chahiye overlap ko 5d se Kam bhi rakh sakte h kya

[@arunannamalai7035]

Welding is not recommended for reinforcement lapping as it alters the material properties of the reinforcement due to heat produced during welding. Also there is reduction in the cross section of the reinforcement

[@rupinderkaur8164]

Nice video good knowledge

[@simrankaur-nx3wr]

Amazing sir 🙏🙏

[@davidrajumamilla125]

Lapping is Right

[@fazalsubhan7064]

Excellent video for informations. Sir one video on stone foundation under plinth beam. Because now a days bricks are very costy.

[@hoangkybactien7207]

I don't understand your language. But my feeling tell me that LAPPING is strongest, easiest and least expensive of the 3 methods. Right?

[@aakiswa]

Kya hum 12mm ke liye coupler use kar sakte hai??

[@nakulakoushalya6976]

Lapping is right

[@manmohannegi3062]

coupler is good or no?