Tub and shower vent confusion

[Kenny Mapes]

Tub and Shower branch I had this

But then thought the bathtub was not vented properly.
The location of the vent pipe is the only place this branch runs under a wall.

Should the BT arm come in downstream of the vent pipe to properly vent this?

Both trap arms are less than 6 feet.

 

[Kenny Mapes]

I thought this might be better

Would this require a clean out?
I quoted the wrong trap arm length for 2" it should be less than 5 feet.

 

[Sponsor]

 

[Terry]

The first one is better. Having the vent on the vertical of a line that is constantly washed is better than a horizontal line that may never be snaked or cleaned. It would be, but what are the odds?

 

[hj]

a better way would have both items connect TO the vertical vent.