Gatling user injection for 50 total users in 1 hour adding 10 users per 5 minutes

I need to setup a Gatling Test with a total of 50 concurrent users, but I have a problem because there is no choice to get it.

I use rampUsers(10) over (60 minutes) but it gets only 10 concurrent users.
Using constantUsersPerSec(users) during (60 minutes) is too stressful.

Is there any suggestion?

Thanks.