Service

Tendons are considered as an external load (and the balance loading is assumed to be included in the load factors).
The reinforcement type (as defined in the design section or design strip segment) is considered (PT or RC).
The stress levels in the structure are determined by the moment envelope for the rule set (reinforcement may be required on both faces).
The design strip segment or design section property "Environment" is used to determine the "Type" of post-tensioned members as follows:
- Protected: Type 3 (0.2 mm crack)
- Normal: Type 3 (0.1 mm crack)
- Corrosive: Type 2
- Very Corrosive: Type 1
Code Rules are applied as shown in the following table.

Table 1. Service rule mapping
Design System	RC	PT
Beam	26.3.3/Annex F (456)	22.7.1 (1343) 22.8.1.1 (1343) 22.8.1.2 (1343) 26.3.3/Annex F (456) (except Type 1)
One-Way Slab	26.3.3/Annex F (456)	22.7.1 (1343) 22.8.1.1 (1343) 22.8.1.2 (1343) 26.3.3/Annex F (456) (except Type 1)
Two-Way Slab	26.3.3/Annex F (456)	22.7.1 (1343) 22.8.1.1 (1343) 22.8.1.2 (1343) 26.3.3/Annex F (456) (except Type 1)

Note: Crack width design is done on all post-tensioned members except Type 1. This is required by IS 1343 11.3.2 and IS 456 26.3.3. Since the spacing provisions of 26.3.3 are not specifically applied, detailed crack width design is performed for all members in accordance with 26.3.3. Crack width design is not required for Type 1 members as by definition they have no tensile stresses, and thus no cracking. See code implementation for additional information.