Terawet Green Technologies
®Uniting Science With Nature
Technology of CEEFT 
Foundation
Concepts and innovations of foundation for Cost Optimized Technology are as follows:
- Stub Corbel linking (Innovated by Sujit Das).
- Stub Arch Linking.
- Stub RCC Tie Linking Foundation.
What is a Stub (Corbel) & Stub (RCC tie) foundation?
In a corbel foundation the walls are supported on cement concrete as base, brick masonry corbels springing from a series of square brick masonry bases.
When to use stub corbel foundation?
a) If condition of the soil is good.
b) Generally for low rise building.
Advantages:
a) Saves materials like cement, coarse aggregate and sand etc.
b) Labor intensive work.
Disadvantages:
It requires high degree of technical follow up.
Method:
Square bases of designed dimensions and positions to be excavated and then 150mm thick plain C.C. (1:8:16) shall be laid.
Soil between pockets shall be excavated as per designed profile.
Brick masonry corbels and wall shall be constructed as per design profile.
Cost Factor is 21% to 25% less from the conventional method of foundation.
Roofing with Reinforced Concrete Cement (R.C.C.) member:
While we plan for the roofing components we have to consider the presence of any of the following influencing factors:
1) Whether the location is in heavy rainfall area, where average rain fall is nearly 3000mm.
2) Whether during the course of a day there is abnormal temperature fluctuations.
3) Whether environmental stage is not inert.
4) Whether local aggregates are not up to the mark, that is where traces of clay & silt is more than 8%.
There can be ten types of roofing components:
a) Solid Slabs - As per IS: 456-1978/2000.
Cost benefit factor - NIL.
Cost benefit factor - NIL.
b) Precast Planks & Joists.
Cost benefit factor - 20% to 30% from solid slabs.
Cost benefit factor - 20% to 30% from solid slabs.
c) Precast doubly curved funicular shell units supported over RCC Ribs.
Cost benefit factor - 20% to 30% from solid slabs.
Cost benefit factor - 20% to 30% from solid slabs.
d) Filler panel slabs as innovated by Laurie Baker.
Cost benefit Factor- 8% to 12% from solid slabs.
Cost benefit Factor- 8% to 12% from solid slabs.
e) Roof with precast Reinforced concrete “L” panel.
Cost benefit factor - 23% to 33% from solid slabs.
Cost benefit factor - 23% to 33% from solid slabs.
f) Precast wavy type Planks & Joists as innovated by Sujit Das.
Cost benefit factor - 23% to 33% from solid slabs.
Cost benefit factor - 23% to 33% from solid slabs.
g) Filler panel slabs as modified by Sujit Das.
Cost benefit Factor - 9% to 14% from solid slabs.
Cost benefit Factor - 9% to 14% from solid slabs.
h) PCC (plain cement concrete) roofing vault modified by Sujit Das.
Cost benefit Factor - 25% to 35% from solid slabs.
Cost benefit Factor - 25% to 35% from solid slabs.
i) Precast doubly curved funicular shell units supported over RCC Ribs modified by Sujit Das.
Cost benefit factor - 25% to 35% from solid slabs.
Cost benefit factor - 25% to 35% from solid slabs.
j) Filler panel slabs as innovated by Laurie Baker & modified by Sujit Das.
Cost benefit Factor - 12% to 17% from solid slabs.
Cost benefit Factor - 12% to 17% from solid slabs.
We advice to use Precast doubly curved furnicular shell units supported over RCC ribs.
Any type of building may be constructed with the help of CEEFT starting from single storied to multi-storied, according to the nature, class and load of the building.
