Exodus 36:20-24

20They made upright frames of acacia wood for the tabernacle. 21Each frame was ten cubits long and a cubit and a half wide, That is, about 15 feet long and 2 1/4 feet wide or about 4.5 meters long and 68 centimeters wide 22with two projections set parallel to each other. They made all the frames of the tabernacle in this way. 23They made twenty frames for the south side of the tabernacle 24and made forty silver bases to go under them—two bases for each frame, one under each projection.