On Fri, 17 Jul 2009 16:49:51 +0100 Cash wrote :
b. One door is only 680mm wide, which is not available in this range.

This would be far more difficult to overcome (having to cut around 75mm
off a (presumably) 760mm wide door - so you'll either have to contact
the makers of the door to see if they will do a purpose made one or widen
the opening (if you can or want too) to fit the smallest standard door
width.

Strength issues apart, taking 75mm off the width is almost certainly going to
screw up the proportions of a four panel door. 686mm (2'3") is a standard door
width. The OP needs to go to a timber merchant or door specialist.

--
Tony Bryer, 'Software to build on' from Greentram
www.superbeam.co.uk www.superbeam.com www.greentram.com