What width of wall is needed each side of bifold doors?

[EllieG]

Hi
Starting a one storey kitchen extension soon and we only have a width of 380cms internal room width. Anyone know how much of this back wall we can use for bifold doors? Have looked for a minimum wall width either side but can seem to find a standard requirement!

Thanks for any help you can give.

 

[freddiemercurystwin]

Normally 665mm on an external corner unless you pay a structural engineer to do some number crunching to slim it down a bit.

 

[tony1851]

.......and if you want proof, it's all here on p29;

http://www.planningportal.gov.uk/uploads/br/BR_PDF_AD_A_2013.pdf

but hope you did algebra at school.... I still can't fathom it