Can it be done legally?

You didn't say what you were driving . If the gvwr isn't over 10,000 lbs. it isn't subject to FMCSA regulation . If over 10,000 lbs. GVWR all time in the truck not in a sleeper counts as on duty . You can't drive more than 11 hours or after 14 hours on duty . Sleeper time under 8 hours does not stop the clock . If you had a half hour pretrip you'd have 13.5 hours left on the clock . You could each drive 6 3/4 hours .

 

What rick said is true. You also must remember that in order to log in a sleeper. The truck must have one. If you don't have a sleeper on the truck then you must stop for at lest 10 hrs at a motel and log it as off duty AND keep the motel receipts to prove it.

 

Illegal, he is going off the old HOS, no more 5+5

 

Then you can use the sleeper berth option. Tell your boss that with todays HOS it would be best to run 10hrs. Switch and let the other guy run 10hrs. You will get there quiker and get bettere rest,

 

Yeah play it safe and do the 10/10 switch, that also allows time in between for your meals and personal hygene. When I was OTR team me and the better half did that daily. good luck

 

You could also split it 8/8, 2/2, if 10 hours is too long. Split logging requires an 8 hour sleeper break and a 2 hour sleeper break.

 

Split sleeper could be done if both drivers had 10 hours off-duty to start:

Driver A SB 8 hrs
Driver B Driving 8 hrs

Driver A Drive for 8 hours
Driver B SB for 8 hours

Driver A Drive for 3 hours
Driver B SB for 3 hours (2 hours is sufficent, however, the extra hour in the SB may prove more restfull, cannot log off-duty when vehicle in motion. 8 + 3 = 11 hours driving)

Driver A SB for 8 hours
Driver B drive for 8 hours

The cycle could continue until the drivers hit the 70 hour clock.

Be safe.

The drivers could not exceed 11 hours