weight divisions

Pre-installed User (sheynde@pacifier.com)
Fri, 17 Jan 1997 17:16:00 -0800

Hi everyone,
I'm looking forward to doing some endurance rides this year, I've read
everything I can get my hands on (driving my husband crazy) Will someone
please explain to me the rules on weight? Is the weight a total of rider
and tact? Is it in relation to the size of the horse? A 900 lb Arab in
contrast to a 1000 lb Quarter, Are there just three divisions?
(lightweight, middleweight, heavyweight).