Frequent 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 exposure category of members as follows:
- Protected: X0, XC1
- Normal: XC2, XC3, XC4
- Corrosive, Very Corrosive: XD1, XD2, XS1, XS2, XS3
Code Rules are applied as shown in the following table:

Table 1. Frequent service rule mapping
Design System	RC	Bonded PT	Unbonded PT
UK National Annex
Beam	(none)	7.3¹ TR-43 5.8.1²	TR-43 5.8.1² TR-43 5.8.7²
One-Way Slab	(none)	7.3¹ TR-43 5.8.1²	TR-43 5.8.1² TR-43 5.8.7²
Two-Way Slab	(none)	7.3¹ TR-43 5.8.1² (Table 5) TR-43 5.8.7²	TR-43 5.8.1² (Table 5) TR-43 5.8.7²
Generic National Annex
All Systems	(none)	7.3	(none)

Note: 1 - for PT members 7.3 is only performed where "crack width" design is requested.

Note: 2 - TR-43 5.8.1/5.8.7 hypothetical stress limit design is only performed where "stress" design is requested.