I am currently reviewing plans for a 6-story condominium project with two levels of underground parking coming up in Ontario, Canada.
The drawings show provisions for 42 electric vehicle parking spots (assuming a Level 2 charger included) in the underground parking garage.
I have read the NFPA document on modern vehicles in parking structures and I was wondering if there any recommendations on what to look out for with the mechanical exhaust system or the sprinkler system designed for this particular area of the building?
Stay safe, thanks.
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8/23/2022 07:56:17 am
Couple things come to mind for the sprinkler side:
8/23/2022 08:06:36 am
Need to ensure that the electrical design accounts that 100% of the chargers can be in use at the same time. Need to ensure that the charges are protected from physical damage.
Todd E Wyatt
8/23/2022 08:26:47 am
The National Building Code of Canada (NBC) calls parking garages “storage garages” and requires the following ventilation :
8/23/2022 09:14:33 am
You can also have a look at NFPA Journal – 2019 March/April issue – Ramp Risk (probably available through NFPA website).
8/23/2022 09:11:52 am
I would be very conservative for a new project.
8/23/2022 09:20:07 am
In addition to my above comments, electric vahicles have more problems.
8/23/2022 10:12:02 am
8/23/2022 10:28:02 am
"Assuming?" do not assume anything, especially in a case like this.
8/24/2022 01:59:09 am
The fact is that a sprinkler system is likely not to extinguish a fire involving a EV. If that is the case and we need to contain fire to area of origin for extended period of time more than 60 minutes then perhaps a low density larger area approach must be considered. Similar to a Aircraft Hanger where cooling over exposure risk will prevent spread with sprinkler system not design to extinguish the original vehicle that ignited. Smoke control is critical smoke dilution with extraction shafts included if the space is underground or a basement.
8/24/2022 12:24:22 pm
I am currently working on a parking garage, that will utiize car stackers. The stackers will allow for 4 levels of vehicles. There is no current precedent, as NFPA only recently started covering 2 levels of stacked vehicles. We are treating this as a storage space. We are providing ESFR sprinklers at the roof deck, and creating a sidewall sprinkler system with the sprinkler located just under the floor of the stacker. We performed a calculation, having both systems included, to try to anticipate a real scenario.
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