We may build a railing for a roof or for a balcony in an unskilled manner, but not in a professional manner. We may replaster the cracks and roll them [as if] with a roller, with the hand and the foot, but not with a trowel.  A hinge, or a socket, or a beam, or a lock, or a key that broke may be repaired during [Chol] HaMoed, provided that one does not plan his work for [Chol] HaMoed.  All pickled foods that can be eaten during the festival may be pickled [during Chol HaMoed].

One who turned over his olives [to soften them] and then mourning befell him, or an accident [befell him], or [his] workers misled him, may place the first beam and leave it until after the festival. This is the opinion of R' Yehudah.  R' Yose says: He may pour [the olives into the press], complete [the process], and seal [the barrels] in his usual manner.