My names Elliott and I'm a furniture maker down in Bournemouth, UK and I'm just about to move to a bigger workspace (woohoo!)
A couple of friends are joining me to work and we've secured an industrial unit that's around 800sqft, but the best thing about it is is 6m high! So to take advantage of this we would love to put in a mezzanine floor to to give us an extra half of space. The rough size of the workshop is 8mx8m so we want to put in a mezzanine that's 8mx4m.
Of course it's easy to go and buy a steel one, but they dont half look boring! We are looking to expand into doing some traditional post and beam framing as part of our overall offer so would love to use this as a chance to create an exhibition piece for the workshop - for practice and for when clients come by.
So here's the design of the frame, all of this design is based on knowledge read from Jack Sobon's wonderful book (https://www.amazon.co.uk/Timber-Frame-C
Ok so heres the run down:
6"x6" timbers on the post, beams and cross beams,
Then 8"x2" floor joists
Posts are 4m apart in all directions so the joists span 4m, joinery is all traditional post and beam, so mostly mortise and tenon, through tenons where possible,
Long beams Are scarfed jointed over the central brace (as per my reading in my timber frame book) then the posts have tenons on the top into the long beam,
Cross braces are placed 6" below the top beam to space out the mortises, to stagger the joint so I'm not taking out too much wood in one point (again as per reading from my timber frame book)
All mortise and tenons are let in to the wood with additional shoulders for strength, same for the braces, everything pegged wit oak of course
Al the beams will be Fresh cut Douglas fir and the floor joists will be standard cArcassing.
And the top will be a simple 18mm chipboard,
The sketchups are attached and the main thing that's concerning me is how to place the floor joists in they arnt done like this in the main drawing, just In a close up) I was thinking letting them in 1" (25mm) and having them run over the top plates - I think this will be strong and height isn't an issue
Thanks for your help!