Exodus 36:20-30

They framed The Dwelling with vertical planks of acacia wood, each section of frame fifteen feet long and two and a quarter feet wide, with two pegs for securing them. They made all the frames identical: twenty frames for the south side, with forty silver sockets to receive the two tenons from each of the twenty frames; they repeated that construction on the north side of The Dwelling. For the rear of The Dwelling facing west, they made six frames, with two additional frames for the rear corners. Both of the two corner frames were double in thickness from top to bottom and fit into a single ring—eight frames altogether with sixteen sockets of silver, two under each frame.