Headache Rack and Wheelbase

You haven't given us the right info. The wheelbase sounds a bit short for a big sleeper truck, but there are many variables. What the kingpin setting is on the flatbed will be the biggest one. How much clearance do you have from the back of cab(or exhaust) to where the kingpin will be in the fifth wheel.

Do you even need a headache rack? They are handy to store stuff and required in Canada and some leases require it as well. Another option is to put a headboard on the trailer instead of a headache rack.

 

Headboard on the trailer is a pain. No fun crawling over it all the time to get on the trailer and no fun tarping with it on.

 

Worst case "should" be a 30" kingpin, so you'll want at least 24" from the front of the trailer to the headache rack, so that's 54" from the center of your fifth wheel to your rack. I personally would be looking for a 244"ish wheelbase

 

Does your truck have a setback front axle? How big is your sleeper? What kind of rack we talkin?

 

What's the distance from the center of your tandems to the back of your sleeper?
(assuming your fifth wheel can be centered there)

Vertical mufflers behind the sleeper waste a whole lot of useable space if you mount a cab shield. A custom narrow rack to sit next to a single exhaust is an option.

 

How about "what kind of truck" and "where is the exhaust"... along with eveyone else's questions. Sleeper size is gonna be a HUGE factor

If it has side of the cab mounted pipes, that will free up about a foot of room on the back. If the pipe is on the rear of the sleeper, your gonna loose about a foot.

 

224wb sounds like a good day cag wheel base. Their cant be much room back their with a sleeper.

 

Go with a 300" wheelbase than you will have no worries!

_I have 9 feet from the back of my sleeper to the front of my trailer.