usta-be... CRTX Tank Car question

Richard Brennan

I think it used to be a single dome tank car...
but has become a 2-dome with VERY different compartment sizes;
A = 3090, B = 4672
Was this done often? I thought the norm was more equal compartments...

Note the staggered double row of rivets for the compartment intersecting the center dome patch:
Time to invest in more Archer rivets!

Richard Brennan - San Leandro CA