In the split-cylinder (indirect tension) test, the horizontal tensile stress along the vertical diameter is given by:

1. A line load P is applied along the generatrix of a horizontally placed cylinder of length L and diameter D. 2. Theoretical analysis along the vertical diameter shows uniform horizontal tensile stress. 3. The value is sigma_t = 2P / (pi L D), as written in equation 9.2 of the unit. 4. Once the load P at splitting is known, the tensile strength is computed directly. 5. The other expressions misstate the factor 2/pi. _Source: IGNOU ET-522 Concrete Technology, Block 2 Unit 9 "Testing of Concrete"._