It is remarkable that, nothing is said of the flooring of the tabernacle. Perhaps to intimate the spiritual worship intended, Ecclesiastes 5:1.
Related Commentaries of Exodus 26:15
Exodus 26:15-17
15 And thou shalt make boards for the tabernacle of shittim wood standing up.
16 Ten cubits shall be the length of a board, and a cubit and a half shall be the breadth of one board.
17 Two tenonsc shall there be in one board, set in order one against another: thus shalt thou make for all the boards of the tabernacle.