Runner beans up against the shed

The problem is, would they get enough light? If you brought the canes away from shed, so that there maybe was enough light, would you still be able to get along the row to pick the beans?
There's probably only one way to find out, isn't there  Good luck!

Hi chaps, I have a 3ft gap between the hedge and the shed and thought that if I "leant" canes up against the shed I  could grow runners ... anyone tried this please ? (there's not enough room really for teepees or a conventional "double row")

As mum says, it needs to be a sunny spot given that they'll only get light from one side.
Don't think picking the beans would be any more difficult than it would be if using conventional wigwam or inverted 'V' supports.

Not sure about obelisks RW - runner beans grow to at least 7-8 feet, and although you can pinch out the growing tips the yield will suffer if you have to restrict them to half that. You might have to use a stake or guy ropes to keep the obelisk upright - the ones I've seen wouldn't be the most stable structures ever invented when covered with bean plants.