Both if it is tied and if it is not tied it is permitted, and that is only if it is prepared for this purpose beforehand.

Rabbi Yirmeya said to Rabbi Abba: And let the Master say it in this way: Both if it is hanging and if it is not hanging, and that is only if it is tied, as Rabba bar bar Ḥana said that Rabbi Yoḥanan said: Like the dispute here with regard to the window shutter, so too is the dispute with regard to a bolt that was dragged, which refers to a pole that was stuck through a hole in the door and into the ground in order to hold the door in place. As we learned in a mishna: With regard to a bolt that is dragged, which is not a part of the door itself but is attached to it and is dragged on the ground, one locks with it in the Temple on Shabbat, because the rabbinic decrees are not in effect in the Temple, but not in the rest of the country outside the Temple. And a bolt that is placed alongside the door and not attached, here, in the Temple, and there, outside the Temple, it is prohibited to lock with it on Shabbat. Rabbi Yehuda says: One that was placed is permitted in the Temple and one that is dragged is permitted even in the rest of the country.

And it was taught in a baraita: What is a bolt that is dragged that one locks with it in the Temple but not in the rest of the country? Any bolt that is tied and hangs from the door and one of its edges reaches the ground. Rabbi Yehuda says: That is permitted even in the rest of the country. Rather, what is prohibited in the rest of the country? Any bolt that is neither tied nor hung, and one removes it from the door and places it in a corner.

And Rabbi Yehoshua bar Abba said in the name of Ulla: Who is the tanna who taught the halakha of a bolt that is dragged? The tanna is Rabbi Eliezer, whose opinion in this case is identical to his opinion in the mishna with regard to the window shutter. It is certainly referring to a shutter that is attached. If it is not attached, Rabbi Eliezer holds that it is prohibited for use even in the Temple.

Rabbi Abba said to Rabbi Yirmeya: It is I who say that this case is in accordance with the opinion of this tanna, as it was taught in the Tosefta: With regard to a reed that the homeowner installed to open and lock the door with it like a bolt, when it is tied and hanging in the entrance, one may open and lock the door with it on Shabbat, and when it is not tied and hanging, one may not open and lock the door with it. Rabban Shimon ben Gamliel says: If it was prepared for that use, it is permitted to use it even if it is not tied. There is an opinion that holds that a bolt need not be attached, and preparation is sufficient to permit its use.

Rav Yehuda bar Sheilat said that Rav Asi said that Rabbi Yoḥanan said: The halakha in this case is in accordance with the opinion of Rabban Shimon ben Gamliel.

The Gemara asks: Did Rabbi Yoḥanan really say this? Didn’t we learn in the mishna: All covers of vessels