I would think that even light (50-100cc) motorcycle chain would work
very well. Even packed full of mud and grit, under hard accelerated
torque, they put up with a lot more than 100 lb loads.

wrote:
Hey, Gene, I'm making a lift, sort of a dumbwaiter if you will. My
bar, screen room, patio, deck and pool are in the back of my house,
which is a daylight basement. Above is a deck coming off of my kitchen
one floor up. So, I'm thinking of using #25 carbon steel roller chain.
I'm guessing that the load would never be over 100 pounds on this
thing, unless my kids get to using it as an amusement ride! So, I got
to thinking, I wonder what the ultimate strength of #25 roller chain
is in tension? Do you have any idea where to find this information or
do you happen to have it handy? Thanks!