Fixing into pre-stressed reinforced concrete?

[Ivor Windybottom]

I'm assuming they're round the perimeter, not in a lattice under the whole lot.

Just anything, it's only a greenhouse on an allotment.

Pretty sure my hammer drill could destroy one of those if it happened to find a hard pebble or a bit of rebar.

 

[Chud]

How do you even walk on them? Must be like a cattle grid - or are they upside down. From the allotments I've seen a bit of blue rope won't be out of place.

They're forming a ring underneath the sides of the greenhouse - the floor will be partly planted (raised bed) and patio slabs for a walkway.

 

[Chud]

I'm assuming they're round the perimeter, not in a lattice under the whole lot.

Just anything, it's only a greenhouse on an allotment.

Pretty sure my hammer drill could destroy one of those if it happened to find a hard pebble or a bit of rebar.

Yeah I picked them because 1) they were free 2)They're bloody heavy so should act as a decent anchor! In hindsight blocks would have been easier but they're in place now with the greenhouse on top of them.

 

[Deluks]

Nonsense. Have you ever worked with floor beams? They will outlive the greenhouse by about a thousand years, holes or no holes.

things lasting a thousand years is important when you're a time traveller

Are you the new Doctor Who?

 

[noseall]

things lasting a thousand years is important when you're a time traveller

Are you the new Doctor Who?

?

 

[Ivor Windybottom]

See screenshot above. No idea how/why, unless you're in the far east or Deluks is in the far west.

 

[opps]

I would use four flute sds bits. The better quality ones will cut through reinforcing bars, eg Makita Nemesis