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Section 22.7.1 Flexural tension stresses in concrete

Hypothetical flexural tensile stress limits are taken from section 22.7.1.

For type 2 members, the temporary service loads adjustment is not taken.

For bonded and unbonded cross sections, Type 3 hypothetical flexural tensile stress limits are taken from Table 8 as "Grouted post-tensioned tendons".

The values in Table 8 are multiplied by the Depth Factors in Fig. 6 as necessary.

For each section, two limit stresses are calculated. The first limit stress is the maximum stress allowed if no supplemental un-tensioned reinforcement is used. The second limit stress is the absolute maximum stress allowed. The supplemental un-tensioned reinforcement is calculated in accordance with the Note under Table 8. Cross sections "with unbonded tendons" (see "Determination of Bonded vs. Unbonded Cross Sections") are classified as "other members" when calculating supplemental reinforcement.

Note: When calculating supplemental reinforcement per the Note under Table 8, the additional reinforcement is calculated as a percentage of the cross-sectional area of the concrete in the tension zone as is done in BS 8110. This is different than a literal reading of the IS 1343 code.