Are the joists in my roofspace strong enough for flooring?

[dickeyman6]

Hi, I am new on the site, and would very much appreciate some help. I live in a 1960's detached house, which has joists in the roofspace which are seven inches deep, and one inch wide. From what I can gather, seven inches is deep enough for the joists to be strong enough to support a floor (I am thinking of converting the attic into a room to use as an office), but I am not sure if one inch wide would be sufficient, or would the whole thing need strengthening before flooring it?

Thanks for your help.

 

[MasterAbacus]

Anychance of some pictures of what your loft structure looks like?

What are the walls made of on the upper floor of the house? Brick? partition?

Do you have dimentions of the loft area?

Are the joists single? or joined? (do they span the loft space as a single peice of timber?)

 

[noseall]

more info' please.

joist span.

joist spacing.

one inch wide joists seems a bit wrong to me.

 

[r896neo]

Are they joists or trusses?