Let's Bring Down A Wall 1

[JAE]

A wall cutter to let contractors cut in a 1 1/4" deep slot in any masonry for conduit/pipes.

https://www.youtube.com/watch?time_continue=141&v=Fd4bFAu4fTQ

Start at about the 2:15 mark on the video.

I could see someone getting carried away with this tool and bringing down a whole section of building.

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[JGard1985]

A real world JENGA game!

Jeff
Pipe Stress Analysis
Finite Element Analysis

http://www.xceed-eng.com

 

[msquared48]

Well, the add is in Spanish.



Mike McCann, PE, SE (WA)

 

[dhengr]

JAE:
And, I’ll bet that they don’t package that machine or its instructions for operation with even an ounces of common sense or good judgement. That machine just makes it easier for a mech. contractor to destroy a structure. They already have cheap machines which can ruin a 12” beam with an 11” dia. hole. And, they can easily rent a backhoe excavator to work on entire bldgs. or whole walls. What? Me worry?

 

[oldestguy]

L0oking at that brick work there isn't much of any weakening done by this work. Find something else to worry about.

 

[JAE]

If I have an unreinforced exterior block wall and they take that grinder horizontally across the full face shells of the blocks at wall mid-height - I'd start worrying.



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[masonrygeek]

Ah come on guys, don't you have any faith in masonry?!? As long as this isn't one wythe of brick, there's plenty of capacity in the wall. They rout out electrical and plumbing chases in an autoclaved aereated concrete (AAC) walls just like this and have no problems. The AAC walls are usually 8" thick of course. So trust your brick and block walls - just don't go overboard.

 

[bob33]

I have a lot of faith in masonry, but JAE is right regarding a hollow CMU wall. The wall would be seriously weakened if the horizontal chase was long enough and deep enough to take out most of a mortar joint or face shell.

 

[Ron]

In the wrong hands, a tool becomes a weapon!

 

[JStructsteel]

Job security?

 

[robyengIT]

portuguese (Brazil) not spanish. Any way it is a common practice (even here, in Italy) to do that job by hand with more wide cuttings. Usually the position of conduits is not foreseen in the design (at least in small houses or medium size buildings): electrician or plumber (central heating) will do according to their judgement.

 

[Huevo]

Job security?

For the lawyers

 

[MotorCity]

I am intrigued by a power tool that eats through brickwork with ease, however...…….

Aside from structural concerns, the end result will look like a complete hack job (similar to plumbers drilling 6" holes in joists to run plumbing through).

So if there is no concern for aesthetics, why not just attach conduit to the wall and not risk compromising the wall??

I'd be tempted to write my name in the wall

 

[masonrygeek]

MotorCity, those are some VERY soft brick they are cutting in to, maybe even underfired. You notice they didn't pick a very dense brick to try their demonstration on. They would have gone through a bunch of saw blades if they had. And to bob33 and JAE points, yeah, hollow CMU is different. The AAC that is used has no voids and therefore doesn't risk anything.

 

[BUGGAR]

That should be used to embed carbon fiber reinforcing.

 

[XR250]

The worker seems to care about his lungs, eyes and the top of his head, but not his ears.