Always "Snug" the first bolt so you don't have to use the spud on the rest of the holes. 1. Insert bolt. 2. "Snug" tighten bolt. 3. Use pin / spud to align remaining holes. 4. Insert remaining bolts. 5. Done.
Took a couple viewings of this video for me to figure out what is happening here which is, the spline section of the bolt is for holding the bolt while the tool tightens the nut from one side only, then snaps off the spline. All so you don't have to have a wrench on the other side? Is snapping off the spline just done to get the spline out of the way, or is it actually snapped off because the proper torque has been reached? Pretty cool. I'd think there'd be applications where you wouldn't want the spline snapped off though, for easy disassembly later.
This is how we do it in Japan, but you have to make the other side a sloted hole and make a proper marking on the bolts to confirm the angle and tightness of the rotation. Checking would be more easier.
That is in fact a wratcheting wrench so I'm very confused to why hes using it as a box wrench. The pretensioning part is using the Lejune gun and "snapping" the bolt. Inspectors are constantly confusing that term with some sort of pre-tightening of the bolt before snapping it. Aisc standards require snug tight condition before pretensioning, meaning tight plies (no-gap) and the nut tightend enough where it cannot be removed without a wrench. Nothing like what he was displaying.
TC stands for tension control . When the end beaks off the bolt is torqued properly .The gun doesn't set the torque so it can be used on bolts of different sizes and grades . ( A325,A490 ) 3/4-1inch . And larger size bolts ,but that is usually a bigger gun .
The first thing I saw Is he had way to big of hole for the bolt he was using. For structural steel, the hole should only be 1/16" larger than the bolt. It also looks like a more crap you are going to have to carry when you climb up.
Always "Snug" the first bolt so you don't have to use the spud on the rest of the holes.
1. Insert bolt.
2. "Snug" tighten bolt.
3. Use pin / spud to align remaining holes.
4. Insert remaining bolts.
5. Done.
谢谢KPF的视频，今天学习到了
Took a couple viewings of this video for me to figure out what is happening here which is, the spline section of the bolt is for holding the bolt while the tool tightens the nut from one side only, then snaps off the spline. All so you don't have to have a wrench on the other side? Is snapping off the spline just done to get the spline out of the way, or is it actually snapped off because the proper torque has been reached?
Pretty cool. I'd think there'd be applications where you wouldn't want the spline snapped off though, for easy disassembly later.
This is how we do it in Japan, but you have to make the other side a sloted hole and make a proper marking on the bolts to confirm the angle and tightness of the rotation. Checking would be more easier.
Awesome
一次締めの跡にマーキングしていれば、本締めでピンテールが破断したときのナット回転角度が分かり易いです。
very great! thanks
Это обычные болты или высокопрочные? Шляпки у них круглые, а как откручивать? И почему они сами по себе не открутятся от вибраций или других причин?
Hi, Thanks for the video. Is it possible to unfasten TCB bolts? If yes, how?
Get the hulk and give him a big wrench...lol
its actually pretty easy just need a knocker wrench and beater (sledgehammer) at least that's how us ironworkers do it
금매김은요....?
Those bolts are called Lajeune bolts and u can t just drop the end of the spline bolt u ll take out some ones eye down below
Is that not a rachet wrench he's using to pre tension bolts?
That should be a scaffolding ratcheting wrench. Poor guy dont know that wrench has a ratchet.
That is in fact a wratcheting wrench so I'm very confused to why hes using it as a box wrench.
The pretensioning part is using the Lejune gun and "snapping" the bolt. Inspectors are constantly confusing that term with some sort of pre-tightening of the bolt before snapping it. Aisc standards require snug tight condition before pretensioning, meaning tight plies (no-gap) and the nut tightend enough where it cannot be removed without a wrench. Nothing like what he was displaying.
why need to remove the end part? please explain. thanks
To make sure that the bolt is fully tensioned.
There is a weak spot on the TC bolt that is designed and calculated to break ant stop torquing when proper torque value is acheived.
해체할때는 깔깔이로 그냥풀면되는지요?
저게 라쳇으로 풀릴런지요.. 조일때도 기계로 강하게 조였는디
why need to remove the end part?
TC stands for tension control . When the end beaks off the bolt is torqued properly .The gun doesn't set the torque so it can be used on bolts of different sizes and grades . ( A325,A490 ) 3/4-1inch . And larger size bolts ,but that is usually a bigger gun .
This is the future in construction with more ease and speed in project planning🇧🇷
The first thing I saw Is he had way to big of hole for the bolt he was using. For structural steel, the hole should only be 1/16" larger than the bolt. It also looks like a more crap you are going to have to carry when you climb up.
Never been shown a nut and washer before !!!!!!
so bad