Normal as in triple?
Yes, although one designed for smaller MTB chainrings might have to sit extra high for its tail to clear the rings. Road front mechs have a gentler curve as do earlier MTB mechs which typically went with 46-48T chainsets.
If you are using something like a Middleburn Duo, then no problems at all.
Beware that road mechs need different cable pull to MTB, so compatibility can be a headache unless you use non-indexing front shifters.