how many loads of fill should a mid sized ctl be able to rough spread per hour
There are a lot of variables with that question.
What model CTL? A mid size CTL is a relative term among manufacturers.
What type of material? Sand is easier to push than a heavy clay for example.
How big of a load? Single axle, tandem, tri or dump trailer?
How big of a fill lift? A 4' lift is quicker to push off than an 8" lift for instance.
What is the purpose of the final product? Commercial building pad or somebody's back yard?
Compaction testing?
All of those questions have a bearing on productivity.