Steve B wrote:
I'm currently putting trusses across two containers 16' apart. Each
container is 8' wide with a 16' space between. 40' long. Trusses
are 32' long to allow a rain overhang. It is sloped with no peak.

My intent was to take the sun load off the top of the containers. There will
also be double doors on each end of the space to be able
to enclose the inside. I intend to put a swamp cooler in each
container.
I was wondering if I put a recirculating water pump to flow water
over the roof and outside vertical east and west sides if that would
cool it very much. I'm probably going to have to just try it. I get
ag water, so there's no problem about added cost.


I would consider setting up low volume sprinkler heads on the ridge. Just enough
water to keep it moist, and let evaporation do it's trick. The sprinkler will
help spread the water, so that all the area gets wet, not just small "streams"
where the water focuses. You might get moss growth from the water, depending on
the water itself, and weather conditions. The sprinklers would require more
pressure, but if you can reduce the volume needed, you wouldn't need a recirc
pump, which may have problems with crud in the water over time.