Gas and Oil Home Heating Furnaces - hanging furnace

I am trying to reinforce my hanging furnace; it is hanging from two 10-foot sections of metal struts the kind they hang conduit from. From there threaded rods hand down and another section of metal strut runs under the furnace. This is in the garage. Its a 1000 square foot house so the furnace is not huge.
I would like to add some earthquake enforcement but can’t seem to find and data on the strength of the steel angles I would like to use. I tried contacting www.steelworks.com which sells in home depot and lowes but they don’t provide load tables. I figure the furnace and ductwork and about 150 lbs, I would like to add a additional set of chains to the heater and run a 14 gauge steel angle underneath (the one you buy with the holes in it.) Will a 14 gauge steel angle hold the weight of 150lbs with the chain connected to it. The reason I want to add the chains is the 10-foot sections of metal struts seem a bit flimsy to me. Does anyone have experience with these?
Thanks

I have "0" experience with earthquake proofing but I would say 14 gauge angle should be more than strong enough.

Does this thing have natural gas running to it?

You would think if you have an earthquake that shakes enough to make your airhandler fall your gonna have alot more issues than that to deal with.

In earthquake zones doesn't code say how everything is to be installed and what is to be used?

One thing to add...When you do this don't block any of your access panels.

Thanks for the answer. Yes it does have gas runing to it, whitch is the main reason I would like to reinforce it.

The reason I asked about the gas service is that I thought I heard that in earthquake areas the gas service is supposed to have a safety device that cuts the gas off in the event of a quake. But like I said I live in Cincy so what do I know. :D