Here it says "Al Yad Ose ha'Melachah." In Melachim II, 22:9 it says "Al Yedei Osei ha'Melachah"!
Malbim: Here it says that it was [first] given to the overseer of the overseers. Osei ha'Melachah are the craftsmen.
What Melachah needed to be done?
Radak (Melachim II, 22:5): The Bayis needed to be strengthened. It weakened from the days of Yo'ash, who strengthened it, until now, 224 years later. Seder Olam says that it was 218 years.
Who are "ha'Mufkadim"?
Malbim: The Mufkadim are the ones appointed [over the workers]; they gave the money to the workers.
Why does it say here "Asher Osim b'Veis Hashem", and in Melachim II, 22:5 "Asher b'Veis Hashem"?
Malbim: Ezra explained here that they did not dwell in Beis Hashem. They only worked there.
What is "Livdok"?
'Rashi': (It is to find weaknesses.) The Targum of "Lir'os Es Ervas ha'Aretz" (Bereishis 42:9) is Lemechezei Yas Bidka d'Ar'a. Malbim ? if weakness is found, "u'Lechazek" ? they strengthen it.
