Appendix C Design flowchart

Notes

1. As an approximate rule, reinforced concrete elements designed for

protection category 1 28 will exhibit a type 1 section and

are likely to respond within the dynamic regime, whereas those designed for protection category 2 > 28 will exhibit a type 2

section and are likely to respond within the impulsive regime. However, this is not a hard and fast rule and the response time of the element tm must always be calculated and compared with the duration of the load td to check that the correct response regime has been assumed in design.

2. For the unusual case of protection category 2 and response within the dynamic regime, a type 2 section should be assumed at this stage. 3. For the unusual case of protection category 1 and response within the impulsive regime, a type 1 section should be assumed at this stage.