Perfect controlled demolition of twin chimneys - video

[Jon]

An interesting building demo fail. Now what do they do?

[Frank S]

Marv, you may note that almost all of them are either block construction or galvanized corrugated sheet metal that are being destroyed with a few exceptions of the random reinforced concrete silos.
the mortar used it the block silos deteriorates or the ground they are sitting on sometimes settles causing them to develop cracks once this happens they are more of a liability than an asset. the ones made out of sheet metal naturally rust out over time creating a liability.
The well constructed poured reinforced concrete silos are probably only demolished should they develop very large cracks or simply the farm owner decides he is tired of looking at it. or tired or having to have it included on his insurance policy. but mostly if it is not being used he still has to pay property taxes on having the thing.
in some states or counties that can really ad up over time especially in states or counties that add an overall height tax to the structures on a property. This is why taxes are at a higher rate for 2 or 3 story homes of the same square footage of roof than single story units of the same size, In those areas the tall slender silo can near equal the amount of tax owed as their barn due to its height.

[Toolmaker51]

in some states or counties that can really ad up over time especially in states or counties that add an overall height tax to the structures on a property. This is why taxes are at a higher rate for 2 or 3 story homes of the same square footage of roof than single story units of the same size, In those areas the tall slender silo can near equal the amount of tax owed as their barn due to its height.

That was justification for Mansard Roofs, France I believe. Dwellings were taxed on number of stories under roof line. One or two inside that pitch and eave is a substantial reduction.