Loops together with the taches were for the joining the curtains together, as appears from Exo_26:11, which way of conjunction was most convenient for the often taking them down and setting them up.
From the selvage, or from, or in the extremity, or end, or edge, Heb. lip. In the coupling, i.e. in the place where the two curtains are coupled together. And likewise the second curtain is to be made exactly like the first.