Beraisa: The fats [of an animal slaughtered on Yom Tov] may not be salted [for preservation], nor can they be turned over for aeration. They said over from Rabbi Yehoshua: They may be spread on sticks.Rav Masnah: The halachah does not follow Rabbi Yehoshua.
Challenge: How is this different from the case of our Mishnah (048) in which Beis Hillel permits skin placed on the ground where it will be stepped on?
Resolution: There his intention is not demonstrated, since the skins are fit to sit upon [it looks like a rug (40, 48)], but here if one is permitted to aerate the fats he may mistakenly salt them for preservation [assuming that the Chachomim permit the preservation of fats from a slaughtered animal.].
Salting meat is not a Melacha but is forbidden by the Chachomim because it looks like salting leather. Even on Yom Tov it is only permitted to salt the meat one would like to eat on Yom Tov.
Rav Yehuda quoting Shmuel: A man may salt many pieces of meat at once, although he only needs one piece [this wouldn’t be permitted with regard to other issurim but because of the potential loss here it was specifically permitted].
Rav Ada bar Ahavah would do a haaramah and salt one piece at a time [claiming that he had found a more desirable piece to salt]. [The Poskim do not bring this better though].
Mishnah:
Beis Shammai: One cannot remove the shutters of booths on Yom Tov [because it resembles building]. Beis Hillel: It is permitted even to replace them [which is certainly not necessary for ochel nefesh (040)]. 
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