How The Castle Pictures Are Built Up

Braal castle shows hoarding under construction.  Hoarding is simply wooden beams thrust through the castle battlements to allow the construction of a wooden shed like arrangement from which various items can be dropped on would-be attackers.  When the hoarding was damaged or set ablaze it was simply un bolted and the beams pushed out dropping this shed like arrangement on the attackers below while also retaining the stone battlements behind to continue the castle defence.