But although the total weight would be legal - is there
a max-per-belt rule that would prohibit it?

In most cases there is a limit of 254 lb per belt. This is the approved load
capacity of the belt. The other two parameters to consider are max gross and
CG limits. It is rare that max gross accomodates 254+254 lbs. For example,
the G-103s at my club range from about 394 to 412 lb max carrying capacity.

Jim Vincent
N483SZ
illspam