בחדש הראשון בשנה השנית באחד לחדש הוקם המשכן
In an earlier commentary (ibid 39:33), Rashi explains how the Mishkan was erected. Apparently, the people presented the finished components to Moshe Rabbeinu, who had not previously been involved with the actual construction of the Mishkan. Hashem had left the placement of the Mishkan, its erection, up to Moshe. The reason for this was quite simple: It was too heavy. No one was able to erect the Mishkan due to the weight of the Kerashim, beams. Moshe was able to stand them upright – by himself. How did he do it? True, he was strong, but not that strong. Moshe…
