1. Conveyance = What will be going through the culvert?
2. Cover Height = From surface to top of culvert section?
3. Loadings = Traffic LM1,LM2?
4. Durability = Whether 50yrs or 100yrs required according to Eurocodes?
5. Water table level?
6. Compaction = What compacting equipment will be used – type & weight?
7. Adoptable = Who is the adopting client organisation?