Exo 26:15-16
The wooden framework. - Exo 26:15, Exo 26:16. The boards for the dwelling were to be made “of acacia-wood standing,” i.e., so that they could stand upright; each ten cubits long and one and a half broad. The thickness is not given; and if, on the one hand, we are not to imagine them too thin, as Josephus does, for example, who says they were only four fingers thick (Ant. iii. 6, 3), we have still less reason for following Rashi, Lund, Bähr and others, who suppose them to have been a cubit in thickness, thus making simple boards into colossal blocks, such as could neither have been cut from acacia-trees, nor carried upon desert roads.
To obtain boards of the required breadth, to or three planks were no doubt joined together according to the size of the trees.