What does the Torah mean when it writes "Vechafalta es ha'Yeri'ah ha'Shishis ... "?
Rashi and Rashbam: It means that half of it hung in front of the Mishkan (like a modest Kalah with a veil on her face) - and half of the curtain at the other end hung down two Amos below the bottom curtains. 1
Why does the Torah say that the sixth curtain was doubled in front of the Mishkan? Only half hung down in front, and it was not doubled!
Riva (citing R. Elyakim) and Tosfos ha'Shalem (on Pasuk 9, citing Hadar Zekenim): Anything that is not stretched is called Kaful.
Riva: "V'Chafalta Es ha'Yeri'ah" is like Min ha'Yeriah (part of it), like "k'Tzeisi Es ha'Ir" means Min ha'Ir.
The Gemara says that the Kerashim were one Amah thick; the north and south walls covered two Amos of the western wall, and the Mishkan was 10 wide. Perhaps they were half an Amah thick, and the Mishkan was 11 wide!
Riva (citing Tuch): We learn from the Heichal. Its width (20) was a third of its length (60).
How did the thirty Amos length of the goats-hair curtains cover the width of the Mishkan?
Rashbam (on Pasuk 9): There was one extra Amah past the first curtains, to cover the sockets, which the first curtains left exposed. 3