notsobigjoe wrote:
From Wikipedia, "Take it or leave it" You should be OK but never take your eye off the underpass... LOL. Notice the "Except on urban routes" Part. In all of my TC travels I've only seen a hand full of structures that I had to go around and the sign was placed well in advance of the structure so I never had to turn around. Always on back roads though. I realize the air dam on the front but winds from the side will give you a rocky ride. The wind has alot up there to grab. I think it's great though. An investment I'm sure!!! Of course this is JMHO. Keep us posted on how it works out.
Joe
Vertical clearance: The minimum vertical clearance under overhead structures, such as bridges, is 16 feet (4.9 m), including both paved shoulders and an allowance for extra layers of pavement. Through urban areas, at least one routing is to have 16-foot (4.9 m) clearances, but others may have a lesser clearance of 14 feet (4.3 m). Sign supports and pedestrian overpasses must be at least 17 feet (5.2 m) above the road, except on urban routes with lesser clearance, where they should be at least 1 foot (30 cm) higher than other objects. The cross bracing of truss bridges has a special additional clearance requirement of 17.5 feet (5.3 m).
Our other rig is a 13'4" fifth wheel. I'm not concerned about the 12'6" loaded height of this.
These raised rack systems are pretty common nowdays. Lots of fifth wheels and buses with them - this is the first truck camper I know of, though. I doubt it'll be much different.