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[Section 31]
[Entire Act]
State of Tamilnadu - Subsection
Section 31(2) in The Chennai City Corporation Building Rules, 1972
| Safe bearing capacities of rocks and soilsmaterial | Safe bearing Tonnes per square metre | |
| (1) | (2) | |
| (a) | Rocks and cemented material- | |
| (1) Rock hard, without lamination and defects,e.g., granite, trap and diorite; | 328 | |
| (2) Laminated rocks (e.g., sand stone andlimestone) in sound condition; | 164 | |
| (3) Residual deposits of shattered and brokenbed rock and hard shale; cement material; | 87 | |
| soft rock. | 44 | |
| (b) | Dense non-cohesive soil- | |
| (1) Gravel, sand and gravel, compact andoffering high resistance to penetration when excavated by tools; | 44 | |
| (2) Coarse sand, compact and dry; | 44 | |
| (3) Fine sand, compact and dry; | 22 | |
| (4) Very fine sand, slit (dry lumps easilypulverized by the fingers. | 16 | |
| (c) | Non-cohesive soils in loose conditions- | |
| (1) Loose gravel or sand gravel mixture; loosecoarse to medium sand dry; | 22 | |
| (2) Fine sand; loose and dry. | 11 | |
| (d) | Cohesive soils--- | |
| (1) Soft shale; hard or stiff clay in deep bed;dry; | 44 | |
| (2) Medium clay; readily indented with a thumbnail; | 22 | |
| (3) Moist clay and sand clay mixture which canbe indented with strong thumb pressure; | 16 | |
| (4) Soft clay indented with moderate thumbpressure; | 11 | |
| (5) Very soft clay which can be penetratedseveral centimetres with the thumb; | 5 | |
| (6) Black cotton soil or other shrinkable orexpansive clays in dry condition (50 per cent saturation). | 16 | |
| (e) | Organic soils, fills, etc.,--- | |
| (1) Fills or made up ground; | See foot note below | |
| (2) Peat, etc. | -Do- |