I watched a great program all about building submarines at Barrow in Furness on Sunday, there was scaffolding all over the place all built to a high standard, scaff tags, ladder gates , trapdoors etc you know the sort of thing. Then they showed a welder climbing down into a void with a ladder gate at the top, the ladder was made of wood, but not a pole ladder, it was some kind of Heath Robinson thing screwed together. Is there a special reason for this ? or was it because a normal ladder didn't fit ?. I must know.:notrust: