Size stone masonry

[shree]

Hi,

I am looking for some information w.r.t size stone masonry.
Is it mandatory for even RCC design where column/footings are expected to take the load?
I have seen some constructions where plinth above a layer of 40mm jally.
If ssm is necessary, what is minimum depth/no of courses recommended?

Thanks

[ardesarchitects]

HI Shree,
Plinth beams are done for various purpose
1. Tie beam
You need to understand the difference between a tie beam and floor/roof beams.
A tie beam is to connect the columns at specific distance so the whole frame structure is strengthened. You can design the tie beam as main load bearing beam also in which case you don't need ssm below the plinth/tie beam .
If plinth/tie beam is not designed for taking load of walls then you need SSM as structural support.

2. Soil retainer for plinth height
You will increase the plinth height of your building minimum 3' from road level, so you need to fill lot of soil in to the plinth level and typical plinth beams are 15" deep. There by you have gap of 1'9" below plinth beam. If you don't put ssm for atleast this gap then the new soil will not be stabilized properly considering there are no soil retainers for each room.
Its very difficult to stabilize or ram the soil compact for the entire ground floor without bund walls / retainers in between.

Regards,
Ar.Praveen.N
Ardes Architects and Interior designers
ardesarchitects@gmail.com
www.ardesarchitects.com
https://www.instagram.com/ardesarchitects

[Visualizer]

Is there any harm in Retaining wall of 8 inch solid blocks instead of SSM ?

[shree]

Thanks a lot Praveen. Great answer again.

[ardesarchitects]

Is there any harm in Retaining wall of 8 inch solid blocks instead of SSM ?

Hi, Visualizer
Using solid blocks is not a major harm but solid blocks are not designed to be retaining walls and also we use lot of water to ram the earth for compaction. cement blocks without plastering has chances of giving up if not cured well low quality blocks. Since stone is a locally available material we use it. The same stone is very expensive in hyderabad or chennai and they use mostly red brick or quality solid blocks.

Regards,
Ar.Praveen.N
Ardes Architects and Interior designers
ardesarchitects@gmail.com
www.ardesarchitects.com
https://www.instagram.com/ardesarchitects