• Welcome to the new and improved Building Code Forum. We appreciate you being here and hope that you are getting the information that you need concerning all codes of the building trades. This is a free forum to the public due to the generosity of the Sawhorses, Corporate Supporters and Supporters who have upgraded their accounts. If you would like to have improved access to the forum please upgrade to Sawhorse by first logging in then clicking here: Upgrades

sizing of storm building drain

Mac Moonfire

Sawhorse
Joined
Aug 2, 2019
Messages
30
Location
Sechelt, BC
I'm trying to size storm building drains from BC plumbing code 2018.
Table 2.4.10.9. and the notes are easy enough to calculate the potential hydraulic load based on the roofs area.
I have a site where two buildings are discharging both gutters and foundation drainage into a main that end in ditch.
I don't know how to calculate the hydraulic load of the drainage system. It seems very site-specific anyway
Thanks
New Document(9) 12-Mar-2021 14-42-04-1.jpg
 

Paul Sweet

Sawhorse
Joined
Oct 17, 2009
Messages
1,578
Location
Richmond, VA
Don't connect the foundation and roof drains. Blockage downstream of the connection will force water coming off the roof back into the foundation drain.
 
Top