Cut a hole in a 500 mm vault.

[Tengan11]

Hi,
maybe a bit of a strange question.

Can you saw from both sides of the wall?
If so, rent a Hilti DD-110 or DD-150. Drill the four corners.
Then cut with a power cutter between the holes. Depending on the machine and size, you'll have to go from both sides.
Find a blade that can handle both concrete and steel or cut the reinforcement with an angle grinder when it's exposed.
Shouldn't take more than a day for two people.
Don't forget the wall stand for the core drill.

 

[betongingenjören]

Hi,

maybe a bit of a strange question.

But I need to make a hole in an old bank vault from the 80s. The wall is 500 mm thick with 3 layers of 12 mm reinforcement.

The hole should be 2100x 1200. Looking into renting a wall saw with a 1200 mm blade, estimating 5-7 days of work if there are 2 of us.
The volume is 1.26 cbm and the weight is about 3.1 tons per hole. Could move it with an excavator once we cut it, but it's definitely easier to cut down into smaller pieces.
I have no experience with this before, but does anyone have any ideas?

Or perhaps some other way to make the holes, but they should look fairly nice, of course, it can be cleaned up afterward.

Sorry, don't have ä, å or ö on the computer.

PS, anything with dynamite or blasting won't work as it's inside a current building..

Drill 4 holes at the corners and then wire-saw each cut. The block then weighs about 3 tons; if that's too much, make 6 holes and 5 wire cuts.
The drilling is done in about an hour, sawing takes 1-1.5 days per hole.

 

[afSumpan]

You need a knowledgeable hole drilling company. Wire sawing is an option. With a blade, you must drill a lot to avoid overcutting. Since the blade is round and the wall is so thick, you need a blade that is 1+ m in diameter. Which means that when you are completely through in the corners

Can you saw from both sides of the wall? In that case, rent a Hilti DD-110 or DD-150. Drill up the four corners. Then saw with a motor cutter between the holes. Depending on the machine and dimension, you need to go from both sides. Find a blade that can handle both concrete and steel or cut the reinforcement with an angle grinder when it's exposed. Shouldn't take more than a day for two people. Don't forget the wall mount for the Core drill.

Wow 2 days 2 people on 2 door holes in 500 mm extra reinforced wall. I think you should be happy if you manage to mark out and drill the 8 corner holes.

If you don't know any hole drillers who can recommend a good company, you need to call around and describe the problem.

My qualified guess is 30k per door hole without waste. And I'm assuming that everything around can withstand water and drilling sludge.

 

[tpsoft]

In our previous house, we opened a doorway in the basement wall. We hired a hole cutting company that sawed the outer edges of the hole with a rail-mounted diamond blade and then cut it into smaller pieces with a handheld machine. We didn't pay much for it, but it was "outside regular hours" and 12 years ago. I would never have attempted it myself, even though I'm usually not afraid to try things and like machines.

 

[Alexn72]

How neat of a hole do you need?

 

[nino]

The biggest problem is probably not cutting the hole but getting rid of the block if it weighs 3t, especially if you can't use a machine to lift it out.
Just getting it out of the wall once it's loose won't be so easy.

 

[HerrPeter]

If I were to do the job, I would use a wall saw, hard to see that you can get as nice a final result in as short a time with any other method. If you don't want to overcut in the corners (due to the blade's radius), you can finish with a chain saw (a chainsaw with a diamond-studded chain, type) to get neat 90-degree angles without cut marks outside the edges of the hole. Other ways might be to run by hand with a ring saw (but then I don't think there's one that gives more than 17 inches of cutting depth) or with a wire saw for the neatest final result.

Good luck, feel free to post some pictures!

 

[Nisse Hult64]

If you can obtain construction drawings, they are valuable. Some arch walls have concrete with significantly higher strength and hardness than 'ordinary' concrete. There may also be devices specifically designed to prevent sawing and drilling (compare with chainsaw trousers). The concrete might also be steel fiber reinforced, making it harder but not impossible.
In the cases I've been involved in where for some reason a hole had to be made in an arch, wire sawing has been used. The most challenging part is getting the chunk out of the hole and then trying to transport it safely.

 

[Holken147]

Rent a diamond wire saw. Similar type to this one:
https://www.hilti.se/c/CLS_POWER_TO...IRE_WALL_SAWS_7124/CLS_DIAMOND_WIRE_SAWS_7124

 

[kulpucko]

Hello,

maybe a bit of a strange question.

But need to make a hole in an old bank vault from the 80s. The wall is 500 mm thick with 3 rows of 12 mm reinforcement.

The holes should be 2100x 1200. Looking at renting a wall saw with a 1200mm blade, estimating 5-7 days of work if we are 2 men.
The volume is 1.26 cbm and the weight is about 3.1 tons per hole. Could move it with an excavator once we've cut it but obviously easier to cut down into smaller pieces.
Have no experience with this before but if someone has any ideas?

Or maybe there's another way to make the holes, but they should look quite nice, of course you can smooth after if jagged.

Sorry, don't have a, a, and o on the computer.

PS, something with dynamite or blasting won't work since it's inside an existing building...

Send an email to info@mkhaltagning.se and describe where in the country and how it should look, and they can probably come up with a good price.

 

[ehlmatlab]

Hello,

perhaps a slightly strange question.

I need to make a hole in an old bank vault from the 80s. The wall is 500 mm thick with 3 rows of 12 mm reinforcement.

The hole should be 2100x 1200. Considering renting a wall saw with a 1200mm blade, estimating 5-7 days of work if we are 2 people. The volume is 1.26 cbm and the weight is about 3.1 tons per hole. Could move it with a digger once we've cut it, but of course easier to cut down into smaller pieces. Have no experience with this before but does anyone have any idea?

Or maybe another way to make the holes, but they should look quite nice, of course, you can put after and taggit.

Sorry, I don't have ä, å, and ö on the computer.

PS, anything with dynamite or blasting won't work since it's inside an existing building..

A doorway in 500mm concrete is quite a lot for a wall saw.
With a 1200mm blade, there will be a lot of overcutting to get the blade through the full depth.
If you can saw from both sides, there will be less overcutting. Using a larger blade for the final cut will also result in less overcutting.
Alternatively, you might corner drill if you can't overcut.
There are also handheld ring saws available, like the Hilti k7000, that you can use for corners to reduce overcutting.
You can also cut corners with a fixed-mounted chainsaw, but it tends to be tricky.
Alternatively, wire sawing could be used, but that's generally not something you can handle yourself if you've never done wire sawing before.

It is not quite easy to handle a wall saw either if you haven't used them before, but certainly doable if you are a bit clever and careful.

My advice is to get help from someone who has experience with concrete cutting who can at least look at the job and give you advice on how to proceed.

 

[Qunaki]

maybe a little strange question.


sorry, don't have a a and o on the computer.

A little OT (or very much), but where does the å in question come from?
Should be easy to paste in appropriate places....

On the other hand, I think everyone has really good tips.
Nice to have a thread where it's not overwhelmed with a bunch of nonsense.
All the rest of you provide a lot of great tips to TS.

A thread with the best answers in one post so far is probably one of this, lots of great tips and professional.
And the worst post here is probably mine!

Completely agree.
1. Nothing to do yourself.
2. Bring in a company.
3. It will cost quite a lot, yes.
4. Plan how the material will be taken out.

My little own tip is still to make it a little bigger and simply cover round corners, snekap, etc. with simpler material so it becomes straight. A few extra cm probably costs less than straight corners.
No point in going for 'precision' and cutting away round corners. Then cover the "bigger" hole, and nothing shows when it's finished.
But listen more to the pros here than to me. Nice answers, congratulations to you all.

 

[Monika L]

Hello,

maybe a slightly strange question.

But need to make a hole in an old bank vault from the 80s. The wall is 500 mm thick with 3 rows of reinforcement 12 mm.

The holes should be 2100x 1200. Looking to rent a wall saw with a 1200mm blade, estimating 5-7 days' work if we are 2 men.
The volume is 1.26 cbm and the weight is about 3.1 tons per hole. Could move it with an excavator once we've cut it but clearly easier to cut down into smaller pieces.
I have no experience with this before but if anyone has any idea?

or maybe another way to make the holes but they should look pretty nice, of course, you can plaster after cutting.

sorry don't have å, ä, and ö on the computer.

PS, anything with dynamite or blasting doesn't work as it's inside an existing property..

Hello,

maybe a slightly strange question.

But need to make a hole in an old bank vault from the 80s. The wall is 500 mm thick with 3 rows of reinforcement 12 mm.

The holes should be 2100x 1200. Looking to rent a wall saw with a 1200mm blade, estimating 5-7 days' work if we are 2 men.
The volume is 1.26 cbm and the weight is about 3.1 tons per hole. Could move it with an excavator once we've cut it but clearly easier to cut down into smaller pieces.
I have no experience with this before but if anyone has any idea?

or maybe another way to make the holes but they should look pretty nice, of course, you can plaster after cutting.

sorry don't have å, ä, and ö on the computer.

PS, anything with dynamite or blasting doesn't work as it's inside an existing property..

This is how it went for me when the safe got locked out. Hired a mechanical workshop that after many hours managed to open it. Everything inside was undamaged but you wouldn't think so when you see the picture

 

[Mats-S]

sorry, don't have a a and o on the computer

A bit OT (or very much), but where does the å in question come from?

Here's how you get the Swedish characters ÅÄÖ on an English keyboard:

https://www.enkelteknik.se/svenska-...lt-tangenten,och sedan 4 på siffertangenterna.

å = Alt + 134
ä = Alt + 132
ö = Alt + 148
Å = Alt + 143
Ä = Alt + 142
Ö = Alt + 153

 

[AG A]

How many minutes/hours do you have before you expect the police to be on site?