A piece of wood
Building construction quickies:
Joe needs some lumber for building a house, and goes into the shop:
I need some wood.
OK, how thick?
Yes, and how wide?
Right. Three by six. How long?
Oh, a really long time. It's for a house.
(The next one may lose its punch if you are from outside the UK)
"'Xcuse me, mate. Is there a B&Q in York?"
"Nah lad. There's a 'Y', an 'o', an 'r' and a 'k'.
Saw a documentary about how ships are held together.