Baraita on the Erection of the Tabernacle (Aramaic: בָּרַיְיתָא דִמְלֶאכֶת הַמִּשְׁכָּן) is a baraita cited several times by Hai ben Sherira, by Nathan ben Jehiel in the Arukh, as well as in Rashi, Yalkut Shimoni, and Maimonides.
It contains 14 sections describing various aspects of the Tabernacle: the boards (1), woolen carpets (2), and carpets made of goat-hair (3), the curtain (4), the courtyard (5), the Ark of the Covenant (6-7), the table (8), the temple menorah (9-10), the incense altar (1), the goblets (12), the Levitical services (13), and the wandering in the wilderness (14).
Lewy inclines to the idea that the baraita was originally part of the Mekhilta of Rabbi Shimon ben Yochai.
The same reason may serve to refute Brüll's view[3] according to which the baraita is an addition to the Mekhilta.
There is much in favor of the view of Grünhut, and before him of Ḥayyim M. Horowitz,[4] that both sections were constituents of the Baraita of the Forty-nine Rules.