is it permissable to run a curcuit overhead from a residental home to a garage?

See article 225

Should also look at Article 396 which tells us, Yes if it's a factory assembly.

George, why only a factory assembly 396.2(2)?

so the way i read the code is it is allowed if i use triplex and maintain my clearances.

Kinda a suggestion that if he is using a cable method to look in each Article called out in T. 396.10(A) but if it's single strands of wire as identified in T. 310.3 or T. 310.6 he would not be able to comply with the (B) part of 396.10 and not be able to use it in residential. And, Yes tom triplex probably would be the best approach. IMHO

thank's for the info guys

Why not UF cable on a messenger?

If the circuit is 120/240 and there is any chance of a present or future metallic connection between the two buildings you will want to use quadplex.
--
Tom Horne

In My Unhumble Opinion (IMUhO) UF on a messenger makes one ugly installation.
--
Tom Horne