Creating a partial second level (Mezzanine)

[RogerE]

I have been playing designing a small sports facility, but wish to create a mezzanine floor over part of the building.

Basically building is a 40m x 20m "box" with 6m walls. At one end there is a 8m x 20m area, which has toilets, changing area etc., and it is only this area that needs a second floor over it, which will basically be a viewing gallery with toilets and access stairs (*). The ground floor has a height of 2.5m.

If I add a level it seems to cover all the available space (40 x 20), and I can't work out how to restrict it to the 8 x 20 area. [:-/]

I am getting more impressed wih this program as I discover more things about it!

(*) not really part of this question, but is there a Disabled Personal Elevator add on available?

[hansmex]

Like this?

sports facility

[RogerTE]

Thanks!

Sorry for delay, but have been away for a few days.

Hadn't thought about splitting walls into 2 halves.