reinforcing loft space joist for floor.

[TKH]

I am looking at reinforcing loft space to take a floor. It will be used as storage and possibly as a bit of office space if practically possible. The house is a small semi detached bungalow. Its approximately 6.5/7 m wide and 9/9.5m deep. The internal walls are block and help support the ceiling.

https://a2-images.myspacecdn.com/images04/5/cd9f8eb9ee904fd7b46f48908e562844/full.jpg

There are 3 wooden beams approximately 47x72mm across the width of the house.

https://a4-images.myspacecdn.com/images04/2/966c7633861e4967af53cbcc1768a8dd/full.jpg

Then hanging under the beams but on top of the internal walls of the house there are multiple wooden beams approximately 30x93mm spaced every 450mm something a little like this.

https://a2-images.myspacecdn.com/images04/10/f8e84139ac4a4215981f7bc2e1b414e3/full.jpg

What would be the best way to strengthen the loft to take a floor with out loosing to much head room?

Thank you

 

[tony1851]

Not having X-ray eyes makes it difficult working it out from a view 50ft up in the air.
Pics of the interior of the roof void would be more helpful.