Suspended floor in part of loft

[Baseline]

Hi all,

I am hoping to get some advice on preparing a part suspended floor in loft above stairs. This will form a small room in corner part of which hangs over an unsupported area at edge of existing floor.I need to support areas A and B on the drawing. I have been advised to "hang floor from Roof Joist then brace entire supported wall labelled "A" and "B. Any other suggestions to support "suspended" portion of floor?

Loft Floor 2 - Copy

• Baseline
• 10 Jul 2016

Loft Floor 3

• Baseline
• 10 Jul 2016

Loft Floor 1

• Baseline
• 10 Jul 2016

Thanks

 

[Baseline]

I build some dodgy framework for corner but looking for advice on doing this properly

 

[Baseline]

Any advice on this one please?