Removing window security bars

[wannadie]

These security bars are cemented into the motor / bricks.

How best to remove them?

 

[blup]

Id try grinding them off flush to the wall. Cut the whole thing apart piece by piece to reduce the load. The "proper" way would be to chip out the mortar, then refill.

 

[Harry Bloomfield]

That, looks as if the steels are set into the mortar of the bricks, in the four corners. I would lash a rope on to the steel, to take the weight, and avoid it coming crashing down, once released. You will need a large enough grinder, to be able to cut through the steel, without it catching on the grinders spindle, and a few thin, steel cutting disks. Wear eye protection!

Chop the steel at the four corners, wherever it is easily accessible, taking the weight on the rope, then lower the released steel to the ground. Then you have a choice of either cutting the four stubs in the corners, still left in the wall, flush - or trying to dig them out of the mortar, and patching up with sand and cement.

 

[freddiemercurystwin]

Chop the steel at the four corners, wherever it is easily accessible, taking the weight on the rope, then lower the released steel to the ground. Then you have a choice of either cutting the four stubs in the corners, still left in the wall, flush

I would do this.

 

[JohnD]

These security bars are cemented into the motor / bricks.

How best to remove them?

If you are a burglar, the usual method is to steal a tow truck or a 4x4 with a hitch, fasten a chain to the bars, and drive away.

 

[opps]

As above. Use an angle grinder with a thin Inox blade. I am a weakling so I would make several cuts to reduce the weight.

Unfortunately, a 115mm angle grinder will only cut to a depth of 24-30mm but as the blade wears down, so will the depth of cut.

The horizontals look to be about 40mm deep. You might need a 9" grinder. Alternatively, I think a reciprocating saw might be safer