Durability of a 45x90 stud

[patman]

Hello.

Is there any documentation on the durability of, for example, a 90x45 regel?
I have a floor in a loft where I have used such reglar and need to know how much they can be loaded.
They are spaced 600mm apart and are 2500 long.

Thank you very much.
Patrik

 

[John J]

mugglo.net/dokument/hus/Spnnviddstabell.pdf