Thanks for posting that Zurn website. I will have to call em. Looks like the nearest rep is in Minneapolis.
I am still a little concerned about just daylighting it out. Afraid we have a big slick spot behind the shop. Good thing is nobody is really ever gonna go back there.
Thing is, I will probally spend 90% of my time in there fall and winter. That is why the exit part concerns me the most. Maybe I am making a mountain out of a molehill.
thanks for all the help so far...
Justin
It's not rocket science, but having concern and thinking it out is good business.
This concern for freezing is a non issue for a dry well....as long as you are below the frost line. Find out where it is (your footings will be a minimum depth = below frost line for your area). Where I work, it's 12". In Alaska, I think it's 48". It varies. Point here, as long as your pipe is below that depth as it exits your shop, it won't freeze.
Trench drains are great, but you still have to have a CB for clean out. Repeat here, but the CB in conjunction with a 90 degree elbow on the discharge keeps your dry well (french drain, leach area, whatever you want to call it) clean. Heavy stuff (sand, dirt, metal shavings, etc) will sink to the bottom and collect in the base of the CB; light items (leaves, wood shavings, etc) will float and won't get into the 90. It's a simple, effective filter.
Your CB is usually outside, but it doesn't really matter. The bigger it is, the more it holds and the easier it is to clean.
As for grates, traffic, etc and all the concern, any of the CB's or good trench drains will support truck traffic. The typical trench drain you'll probably get is only 6" wide; with a steel grate (you can get cast, galvanized, high heel designs, whatever) will easily support a full size truck (semi). Most fork lifts are ok to (smaller tires, bigger pressure per sq inch). CB's come with cast grates...just like in the streets.
