Building a plaform/Mezzanine, timber, construction

[Sadruddin]

We're at the tail end of a self build, and in the last room to be completed are considering a smallish platform/mezzanine across half the room.
The size of the platform will be 3220 across the centre of the room by 2200 deep.

I have a 170x77 beam which I'm thinking of putting across the room, (long side of the platform)
and am thinking 47x200 beams at 400mm centres, joined to a heavy beam against the wall.

The floor to the underside of the platform will be 2 metres.

Plasterboard underside, 18mm mdf top side.

It won't have to take much weight at all, possibly a bed, more likely a chair with one person in it.

Any thoughts, please, greatfully received.

 

[Sadruddin]

Ahem? Any commengs/objections/advice?

 

[Deluks]

Seems slightly inadequate. The beam will be taking the weight of your bed/chair, person, plasterboard, MDF, and the 8x2's.

It will probably be alright though, worst case is cracking of the plaster (assuming you were going to skim the plasterboard)

 

[freddiemercurystwin]

I'd use use 2 x 8x2's for the beam.

 

[Sadruddin]

I'd use use 2 x 8x2's for the beam.

Sounds good