Hello, everyone.
This is Enta.
The other day, late in the afternoon, I received an email like this from a Nepalese technical intern:
That had me laughing so hard lol
I'd like to tell you about Japan next time ^^
The other day, I went to a rebar installation site to perform tightening operations using a torque wrench.
It's about time they stopped this completely pointless management.
If you rely on torque settings to control tightening, there’s a good chance you’ll end up tightening the fasteners too loosely!
As I’ve mentioned many times on my blog, there are always areas with lower loads depending on the design.
In such cases, it is standard practice to convert the design load (Td) to torque and set the tightening torque to 50% of that torque.
(Cost Estimation Data from the National Association for the Protection of Specified Slopes)
If the torque is really low, it might even come loose if you turn it by hand lol
It's fine, really.
Since the rebar insertion method uses full anchorage, as long as the nuts are tightened, that should be fine for now.
However, if it were to come loose and fall off due to wear and tear or the car's vibrations, it would be a major problem.
So now, when it comes to tightening, we make sure it’s just tight enough so it doesn’t come loose.
That's whyJust tighten it securely with the clamp, and you're all set.That's the reason.
Well, if you tell me to do it, I'll do it, but if you ask me for details, I'll just say it's a waste of time lol
It can't be helped (since it adds up through cumulative calculation),
There's also the argument that I don't have to do the calculations... lol (Since it's already written down...)
I’ve written about this issue countless times, but since nothing has changed, I feel like it’s going to go on like this for the rest of my life.
When I think about it,A nut that absolutely will not loosen but does not interfere with the rope rod and cement slurry structure
If you can do that, it means you don't need torque, right?
To begin with, it is the plate and nut that prevent the component from being pulled in (by shear force) when it slips.
That's when it really comes into its own.
So, as long as the nut doesn't come loose and the plate stays securely in place, there's no problem at all.
From the perspective of a rebar installer,
After all, the key to their effectiveness is leaving the rebar and cement slurry undisturbed, without applying any tension.
I wonder if just making the nut would make a difference... lol
See you later.
The significance of torque wrench management in rebar installation lies in its simplicity.
