Thanks cvg,
Yes, for this site, the time of concentration is 10 minutes. So will use "rainfall duration" of 10 minutes intensity with frequency of 1 in 10 year for design of drainage structures.
For example in Florida.
1 in 10Y Rainfall intensity(10 minutues duration)=7.5in/H
1 in 10Y Rainfall...
If the Council requirement is to design the structure for a 10 Year design frequency.
Can someone please explain which stormwater duration is appropriate to use for the design of say drains within a commenrcial area? I was thinking of using rainfall duration of 10 minutues to size the drains.
Can anyone give their views on internal joint protection of welded steel pipe less than 600mm diameter.
For larger pipes, we can physically apply concrete line internally to protect the joints.
