Perfect controlled demolition of twin chimneys - video

**Frank S** · Dec 12, 2018, 12:40 PM

Pjs When I made the cylinder I used a 4" rod the piston was 8" the wall thickness on the cylinder was 3/4" and yes double acting the main problem in making the cylinder was I had to make such a short head or gland and a thin steel piston of only 1.5" the head was only 2 inches thick and made of steel as well os I had to use a bronze bearing in it the power unit was basically like you would find on a larger log splitter or pony unit on a hydraulic operated trailer. so it had a 4 way valve you just moved the leaver left right or center. the hosed were only about 25 feet so we just lowered everything from floor to floor as we went down. Simple fast and very efficient Hung from a chain hoist on a tripod. I imagine the company called Concrete cutters probably still has it leaning against a wall in their shop I can't imagine them ever getting rid of it.

**basil3w** · Dec 12, 2018, 05:44 PM

Certainly does top it! Just think about how efficient the crane/excavator combination actually is: After weakening a section of stack, the crane operator could signal the guy in the excavator to buckle his seat belt and then use the excavator as a wrecking ball!

**drivermark** · Dec 12, 2018, 06:01 PM

An operator in a machine dangling from a crane ..... that would almost make an OSHA inspectors head explode.

**Toolmaker51** · Dec 12, 2018, 07:42 PM

Originally Posted by drivermark

An operator in a machine dangling from a crane ..... that would almost make an OSHA inspectors head explode.

Will now employ an adjective I never use.
AWESOME
How many cranes and operators can we get together?

**hemmjo** · Dec 13, 2018, 09:26 AM

Originally Posted by drivermark

An operator in a machine dangling from a crane ..... that would almost make an OSHA inspectors head explode.

That would be an improvement for many of them!!!!

**Jon** · Dec 19, 2018, 10:27 AM

**PJs** · Dec 20, 2018, 01:00 PM

Finally, now we know how they feel!

**ranald** · Dec 28, 2018, 12:33 AM

CUSTOM acro props. Life is too short!

**Jon** · Jan 12, 2019, 01:58 PM

Demolition of a cooling tower on a German nuclear power plant. It was done this way (instead of with explosives) because of its proximity to a highway, a railroad, the former reactor, and the Rhine river.