converting a garage

I have a large garage at present that I wish to convert in to a car port and work shop.

Its built of timber and covered on the outside with T&G wood. It looks as though its a converted hut or something as inside the original owner added some extra support to the pitched roof which is covered with corrugated metal sheeting.

I don't have the money to pull the thing down and start again so I was wandering if it would be possible to modify it and strengthen the timber on the inside as I would like to add a tiled roof and replace the T&G timber with ship lapping over time.

i've looked on the internet but I can not find any way to calculate / work out the specification of the timber supports for the sides as well as the timber for the roof.

Can anyone help?

If yes, then I will supply the size.

Many thanks,

Adrian....

PS, please don't ask me to go to a structural engineer.....

what's wrong with structural engineers, they are a friendly bunch aren't they Shytalkz?

Nothing at all, its just extra cost ....

How big are the existing timbers? Wall studs? Joists? Trusses? Foundation wall?

T&G/shiplap, not a lot in it, no point replacing unless it's rotten.

At present its 6550 long X 4700 wide.

I plan to incraese the length to 9600 and use the back 4100 as a work shop. Between the garage and the workshop I will build a stud wall.

At present the wooden garage sits on a 1M deep single brick foundation which sticks out the ground by 2 bricks high.

The supporting timber is set at about 600mm centers and made of planed 3X2" timber. This is also sitting on a 3x2" timber thats on top of the brickwork , base plate ?. Its also at the top which supports the T&G. 2 windows down the sides but again 2X3" around the window opening.

Roof support
--------------------
| | | |
| | | |
| | | |
| | | |
----------------------
Brick

Something like this

The roof, well lets just say its a bit of a mess. there are 2 joists about a 1/3 rd of the way down the garage 4" square and a 4" square timber across the front doors that open out.

There is timber laying up the rook but allot are missing, on top is corrugated tin.

The tiles I want to use are plain concert tiles by Marley

Do you need any further information ( i understand that the roof will need to come off at some time as well so thats not a problem.