Reconstruction of Columns and Beams in Common Walls

Hire a good civil engineer locally. It will be more practical.

Does or did your existing structure have columns and beams?

Thank you for the reply. Presently it is a RCC structure with beams and column. So decided to cut the extension steel bars from neighbouring slab and beams with the electric cutter so as to minimise the damage at the time of demolishing.

That is not at all clear.

Have you already demolished or are you poised to do so?

If you have already disassociated yourself from the neighbouring properties then build your new structure in between them and don't connect. Easy enough.

Has the structural design been completed yet?

Can you post some photos please?

I have not yet demolished the construction. It is planned in the next week or so. Presently in the process of searching the agency who are in the business of building demolishing. I am just collecting an information other than those agencies. Because they may misguide me on this. Thanks.

Does your existing structure have independent columns or are they shared with the neighbouring structures?

Cutting the beams will require more than just steel cutting. The concrete will have to be broken out too. I doubt your demo contractor will have a large diamond bladed concrete saw in your part of the world (not too different to here).

An electric demolition hammer is preferable to a sledge hammer for breaking out the concrete. Less shock through the building(s) and faster.

The beams should be supported as they are broken up so you don't pull the neighbour's columns down or crack the walls.

Thank u for thr reply,

What u said is absolutely right. I just talked to contractors who do all demolishing work. He said he will use high speed diamond cutting blade to cut the steel inside common beam and slab. so as to seperate out the beam and column from common structure.

As far as new columns are concern they going for seperate columns near th existing common wall with catilever column that is base of the column is towards my side.

I will keep on asking soem questions as and when my construction going on.

Sounds OK.....

I just hope that the demo-guy' personnel actually follow instructions and don't do their own thing when the boss is away.

Post some photos if you can.

Please refer to forum member's postings for the recent thread found at this link:

http://cr4.globalspec.com/thread/81699/Erecting-a-Building-On-Ground-Level-That-is-Above-the-Basement-Roof-Slab-Floor

It appears there are mysterious and inexplicable motives herein these postings by others……

you should start from soil or ground expert opinion

smth. like that http://www.indeks.ru/eng/service_m.htm?id=186

so ground stresses wont form a cracks on your neighbours walls

... i donno much about that subj. anyway so i better keep quiet

Leave his walls alone and build your own next to them on your own engineered footers.

Concrete block walls are not flimsy if you fill them with grout and one piece of re-bar in every other cell.

If you do this you can hang your FF floor system on the surface of the wall with the appropriately sized and fastened ledger.