needles or strongboys?

[mordzy]

Im removing a wall as part of my extension in my stone built house. The walls are about 500mm thick and rubble filled and is the old external wall. On the outside there is no 1st floor on the inside there is a bedroom/bathroom above.

Ive had structural calcs done for the steel etc. However I have a question about removing this wall. Im told knocking through with needles is best however I dont really want to punch through the floors to go above with the needles.

Can I prop the joists with acrow's and a scaffold board on internal and use strongboys on the outside bit or are they not strong enough? my only other thought is to do needles but do them at ceiling height and have the beam lower than this.

Id also planned to drill above the wall and spray in foam to try and stop the rubble and crap falling out when I remove the wall

Appreciate any advice.

 

[Bonni]

Can do and I think they recommend 800mm max spacing with the strong boys.

 

[^woody^]

You need to be very careful with rubble filled and random stone walls, as there is no inherent support that you get with bonded brickwork. Sections of wall can just drop in between spaced props.

You should not use strongboys.

 

[stuart45]

I live in an area where there are a lot of random stone walls and would put in needles and also some ply etc under as even small stones hurt.

 

[Notch7]

Appreciate any advice

Wear a hard hat

 

[mordzy]

Thanks for the advice. Much appreciated