Placement of interior support for joists – explanation of explanation requested!

[robinjoensuu]

I am designing a house and found the following tables from Svenskt trä: https://www.traguiden.se/konstruktion/takstolshandboken/takstolstyper/4.6-trabjalkar/4.6.2bjalklag/

For a floor structure in structural timber with two spans, it says: "The inner support can be placed freely within the area 0.4L ≤ A, B ≤ 0.6L."

I preferred spending time in the rehearsal space over studying in high school, so the question is: Does this mean that with a hypothetical floor length of 10 meters, the supporting wall can be placed anywhere between 4 and 6 meters?

 

[Bernieberg]

You didn't see the one who made this guidance in the rehearsal space? If A>0.4L, then B<0.6L automatically follows. And in that case, it's allowed to place the center support at the end, meaning it's not included at all (you can place it 2 km outside the property if you want).

The likely intended meaning should be as you thought, that none of the sections should be larger than 0.6L.

 

[robinjoensuu]

That's what I thought. Thanks!