Each frame is to be ten cubits long and a cubit and a half wide.
Very particular directions are here given about the boards of the tabernacle, which were to bear up the curtains, as the stakes of a tent which had need to be strong, Isa 54:2. These boards had tenons which fell into the mortises that were made for them in silver bases. God took care to have every thing strong, as well as fine, in his tabernacle.
Commenting on Exodus 26:15-30
Two tenons shall there be on one board,.... Every board was to be so cut and shaped at the lower end of it, as to have, as it were, "two hands" (r), as in the original, to enter into, lay hold on, and fasten in mortises: set in order one against another; at a proper distance from each other, as the rounds of a ladder...
Ten cubits shall be the length of a board - Each of these boards or planks was about five yards and two feet and a half long, and thirty-two inches broad; and as they are said to be standing up, this was the Height of the tabernacle.