Min.Ground Clearance Trailer/firebox

I'm sure there are some A+ builders here like TuscaloosaQ that might chip in if he sees it among others but also check out smoker builder forum, you'll def find answers to every question you have.

The height of a railroad track plus a couple inches. :razz:

Just make sure the bottom of the firebox is ABOVE the lowest point of your rims(in case you get two flat tires). We went 2" above when we built ours. You still need to be careful going over speed-bumps though.

I try and never have les than 7 inches..you can put a drop down hitch that comes out of your receiver... On the tow vehicle. That will lower the front of the unit a bit and raise the back up. At the firebox

In addition to the risk of hitting things (like RR tracks:wink you need to consider approach and departure angles compared to the placement of your axle. Take a look at places you are likely to drive (driveways, parking lots, etc) and estimate slope angle vs to adjoining level roadway. For example it should be pretty rare in urban or paved reasdential areas to have more than a 12*-15* angle. Put a straight edge at the center line where your tire hits the ground and with one end sitting on te ground, elevate the other end to that same 12*-15* angle; the height above ground level where that intersects the back of your trailer or firebox gives you your minimum hright for the 12*-15* departure angle.

Maybe a more practical answer: my trailer is about 10 feet total length with the axle offset slightly to the rear and the back trailer & firebox is about 8 inches above the ground; I don't have any trouble.