No. Strike rank is hard to explain, but generally don't look at it as a measurement of time--just a measure to determine who goes first in a round.
Again, since it's so strange, sometimes it is a measurement of time (like sorcery magic SR, and missile attacks to some extent). For missiles where it is possible to attack more than once per turn, you have to add 5SR to the normal SR to ready the missile/weapon between each attack.