The joints began to become bolted or nailed instead of being mortised and tenoned. A purlin-plate runs across the top of the bents, also mortised and braced. The use of mortised joints and anchor bolts cyclone-proofed the house. The mortised and tenoned and pegged beams are arranged in "H-shaped" units. The tracks were laid on concrete sleepers mortised into the bedrock. These sections were mortised, so that all four sections appear to meet at the corners. The wooden pieces were not mortised together, but only loosely put next to each other. When a wall bottom plate was used, it was also mortised.