Title: 4. Leieavtaler.pdf
24. Ensure new or existing drainage systems are designed to convey the 60 minute, 100-year rainfall-induced site runoff without causing property damage. The duration of the design 100-year rainfall is selected to maximize site runoff. Both subsurface routing (drainage piping) and overland flow can be used to direct the runoff. 2015-01-07: This is not foreseen to be a problem. Verification will be sent to FM Global in due course for review.24. Ensure new or existing drainage systems are designed to convey the 60 minute, 100-year rainfall-induced site runoff without causing property damage. The duration of the design 100-year rainfall is selected to maximize site runoff. Both subsurface routing (drainage piping) and overland flow can be used to direct the runoff. 2015-01-07: This is not foreseen to be a problem. Verification will be sent to FM Global in due course for review.