pillar plus foundation required ?

[Chandu]

Hi All,
I am planning for a G +2 house.
Should I go for pillar only or should I have foundation(paaya) also.

Currently have 12 pillars digged (5feet *5feet) , plan to use 16mm and 12 mm rods.
My contractor says its enough and foundation or paaya is not required.
He tells plinth beam will be there , so no need to stone paaya , please suggest me how to proceed.

Thanks in Advance

[keerthi.blr]

Please do ask him to lay the foundation. Plinth tie should be above the foundation. Its all there for a reason.
It is very important to get your structural plan done by Engg. Do not rely on contractor for this.

A person [Your contractor] who tries to save labour and hesitates to put foundation right at the begining of construction, will hesitate to do so many other things in the future as construction proceeds.
So as a precaution, please have an agreement to clearly say what is covered and what is not and very importantly include "Payment schedule". Do not release any amount before the work is done. This is out of my experience. Many of my friends on this forum who have faced similar issues will surely agree with me

[Chandu]

Thank you for the valuable inputs.

[kpb2308]

Mine is a column construction too. The column footings were almost 6 feet deep. Still, the structural engineer recommended 3-4 feet deep size stone masonry along the external walls and the plinth beam rests on this.
All other constructions around my house did not go for that deep a SSM foundation. When asked, my contractor said it is always better to have a strong SSM foundation even in column structure. Reason he says is, if your neighbour goes for a basement structure and excavates the land, there is a possibility of soil under your house getting disturbed, which will impact your flooring etc. If you have SSM foundation along your external walls, this will be prevented.

[ardesarchitects]

ssm is recommended below plinth foundation for various reasons
1.avoids wall settlement cracks
2.avoids rodents to dig in to your ground
3.plinth steel consumption will be less
4.bonding of columns are good

Regards
Ar.Praveen.N
Ardes architects and interior designers
ardesarchitects@gmail.com

[basha_skj]

SSM on external walls alone is it sufficient or not? My mason says PCC below SSM will not be required. I need experts comment on this.Quick response is appreciated.

[girishd]

basha_skj,

PCC is a leveling course and is laid about 3-4 inches first before SSM. I don't have knowledge of pillar construction because ours is a load bearing wall construction. PCC (with ramming) provides a stable surface to build SSM foundation is what I was told by engineer.

Other members with experience in pillar construction will be able to provide suggestion.

[KVS Setty]

Hello to all,

Mine is column structure and in the contract agreement the foundation is described like the below para and i hope everything you guys talking about is included, please pass on your comments on this topic as i am new in this concrete jungle lingo.

Foundation: Earthwork excavation for a depth of 5 ft for footings,PCC 1:4:8 bed of 4 inch thick,Size stone masonry foundation for 8" wall up to 6 courses,plinth beams for partition walls as per structural drawing. ( Foundation and columns provided for Stilt+3 floors)