Rashi on Numbers 4:32/רש"י על במדבר ד׳:ל״ב

1ויתדתם ומיתריהם [AND THE COLUMNS OF THE ENCLOSURE ROUND ABOUT IT AND THEIR SOCKETS] AND THEIR PINS, AND THEIR CORDS — i.e. the pins and cords of the columns only, because the pins and cords of the hangings were part of the burden of the Gershonites (not of the sons of Merari). There were, as a matter of fact, pegs and cords for the curtains and the hangings on their lower edges in order that the wind should not raise them, there were also pegs and cords for the columns, round about, upon which to suspend the hangings by their upper edges on poles and rails, just as it is set forth in the Boraitha dealing with the work of the Tabernacle (cf. Rashi on Exodus 27:10, 19; Numbers 3:26 and our Note thereon).