Attached to my house, I have a concrete terrace that measures 7x2.5 meters. It's located in a sort of alcove along the facade, so one long side and half of the short sides are cast against the house. The other long side stands on 4 pillars, each 200x200 mm. The terrace is about 1.2 meters above the ground. It now needs to be removed.
According to the construction drawings, it was cast at the same time as the floor slab inside in 1968, but the reinforcements in the terrace do not connect with the floor slab according to the drawings. It is reinforced with 16 mm on the outer edges and 8 mm, with 8c280 on the drawings, does that mean the iron is spaced every 28 centimeters? Unfortunately, the slab is 20 cm thick. The ballast seems to vary from smaller grains to larger stones, with some as large as 4 cm, but I'm not sure how this affects the strength. Do I need to brace the slab before taking it down, or will it hold together due to the reinforcement during the dismantling work?
I've searched a bit on this forum on how to best remove larger concrete structures, and I need your help on what's best to do. I've previously demolished bathroom floors with a cheap machine, and it worked reasonably well, but this slab feels harder.
1. Jackhammer, the largest that can be rented, such as a 30 kg Bosch or similar. Can such a tool really handle a slab like this? I'm not exactly Hulk, and I have no idea how long it would take or how strenuous it would be. Does anyone know?
2. Floor saw. Would it work on an elevated terrace? Not so fun to handle a 140 kg floor saw if the part I'm cutting loosens? Can the reinforcement handle it?
3. Gas-powered cutter. Does it work on such a thick slab with reinforcement? I understand it creates a lot of dust. Does it take a long time?
4. Hire a guy who left a quote of about 20k after tax reductions for removal and disposal. He'll probably use a hammer attached to an excavator, and then I'm worried about how the house will hold up, requiring an inspection before and after at a certain cost? Plus, it feels like spending money for nothing.
I tried over the weekend with a cheap machine, but it couldn't handle the demolition at all, although the drill worked quite well, so it's possible to make holes at least.
Ideas?
According to the construction drawings, it was cast at the same time as the floor slab inside in 1968, but the reinforcements in the terrace do not connect with the floor slab according to the drawings. It is reinforced with 16 mm on the outer edges and 8 mm, with 8c280 on the drawings, does that mean the iron is spaced every 28 centimeters? Unfortunately, the slab is 20 cm thick. The ballast seems to vary from smaller grains to larger stones, with some as large as 4 cm, but I'm not sure how this affects the strength. Do I need to brace the slab before taking it down, or will it hold together due to the reinforcement during the dismantling work?
I've searched a bit on this forum on how to best remove larger concrete structures, and I need your help on what's best to do. I've previously demolished bathroom floors with a cheap machine, and it worked reasonably well, but this slab feels harder.
1. Jackhammer, the largest that can be rented, such as a 30 kg Bosch or similar. Can such a tool really handle a slab like this? I'm not exactly Hulk, and I have no idea how long it would take or how strenuous it would be. Does anyone know?
2. Floor saw. Would it work on an elevated terrace? Not so fun to handle a 140 kg floor saw if the part I'm cutting loosens? Can the reinforcement handle it?
3. Gas-powered cutter. Does it work on such a thick slab with reinforcement? I understand it creates a lot of dust. Does it take a long time?
4. Hire a guy who left a quote of about 20k after tax reductions for removal and disposal. He'll probably use a hammer attached to an excavator, and then I'm worried about how the house will hold up, requiring an inspection before and after at a certain cost? Plus, it feels like spending money for nothing.
I tried over the weekend with a cheap machine, but it couldn't handle the demolition at all, although the drill worked quite well, so it's possible to make holes at least.
Ideas?
Can't quite picture the construction in my head when I read.:x But if I have understood correctly, it sounds like a pneumatic Jackhammer, or Atlas Copco could take it down, to saw it down, you have to jack it quite a bit.freddeh said:
Yes, a regular compressor isn't really enough, but if you rent a diesel compressor and a large concrete cutter, it costs about a thousand kronor for a day, and you should be able to manage that. Invite some friends and take turns.freddeh said:
http://www.cramo.se/Web/Core/Pages/StartPageCountry.aspx?id=6769&epslanguage=SV