6m x 3.6m Garden Room Base Question

[Davieboy84]

Hi everyone,

 

First post so please go easy!

 

Currently planning my garden room build, which is going to be 6m x 3.6m. For the base I'm planning to go down the relatively simple route of using 3x rows of concrete block plinths spaced 1.5m apart (front middle and back). 

 

For the timber floor framing I'll be using 4x2 treated timber and my question is around how do I do form the 6m sides of the base from the 4x2? Can I just join a 1.2m section to the standard length of 4.8m using a connector plate or similar to make a 6m long length of 4x2? Once I've constructed this 6m x 3.6m outer frame and squared it up I'd then hang the joists across the 3.6m span spaced 400mm apart.

 

The only other way I can think of is constructing a 4.8m x 3.6m rectangle frame and a 1.2m x 3.6m rectangle frame and bolting them together. I was worried though that it might be difficult trying to square up two rectangles bolted together.

 

Apologies if this doesn't make a lot of sense but I've searched everywhere and can't find any guidance or videos that cover this.

 

Thanks for any replies, David.

[Iceverge]

Can you describe the plinths you're proposing, is it a conventional strip foundation?

Sketches would help. 

 

 

If its continuous, you could put down a sole plate and then just angle nail the band joist around the edge. You could save a small bit here by avoiding joist hangers too. 

 

How do you plan to insulate? 

 

I'm in the middle of a tiny trial project at the moment myself. Might make a thread. A 2.4*2.4 pump house and tiny drying room.

 

 

[Canski]

See Oakwood garden rooms on youtube. Great base solutions on there 

[mr rusty]

mine:- https://community.screwfix.com/threads/garden-room.256842/

[JohnMo]

Mines going on 3x2 heavy concrete slabs, bedded on 3-4" of concrete, on well compacted sand.

 

Had the slabs and will give a solid base to work from.

[oliwoodings]

You can get 6m lengths of 2x4 from any reputable timber merchant, usually won't cost you more per m either.