That's going to depend on the height. Sleeper berth regulations are covered in FMCSR 393.76 (see related link at the bottom). In order to be a legal sleeper berth, it must also be properly equipped IAW those regulations (again, see the related link).
Cowtown Sleepers can make a sleeper cab for any truck out there.
26000 lbs of cargo? A tandem straight truck, such as a flatbed or a dump, could haul that amount of weight legally.
75" long x 24" wide x 24" from the top of the mattress to the ceiling inside sleeper berth. Must have a minimum of 4" thick mattress. see www.crewcabsleeper.com
For comercial drivers it is not allowed to use "Sleeper Berth" on your log book unless there is a sleeper (bed) in the truck. But you can drive without a bed as long as you follow the rules. Not also that you must have an actual DOT legal sleeper in order to be able to use the Sleeper Berth line - a bed alone does not make it a DOT legal sleeper. The FMSCA website has the required specifications for a DOT legal sleeper. Additionally, you don't want to be caught sleeping in that vehicle if you have to log your down time as Off Duty. If, for example, you're running a hotshot with a pickup, and you stop in a rest area only to find that DOT set up an inspection station there, you will get hammered if a motor carrier enforcement officer sees that you were in that vehicle while you were on the off duty line. Now, if you're referring to just driving a cab and chassis truck, and not referring to a sleeper berth in a CMV, that's perfectly legal, so long as you meet the lighting requirements at the rear of the vehicle.
Well depending on what you want to know. The tractor itself varies by what it is. Daycab,Sleeper,Studio Sleeper,ETC.. But, the total legal weight a semi can be on the road in the US is 80,000 pounds without have special permits.
In some instances, yes.
No.
Yes. A Class 7 single axle straight truck exceeds the 26000 lb. GVWR. A semi truck is a Class 8 truck.
No. You have to sleep on the roof.
You need to call your state's DMV on this. I know I have seen the F750 registered as a 26k truck before, but the laws on this will vary by state.
17,000 - 20,000 lbs.
ranges between 17k-20k