I haven't seen anything in the Bible about that. Have you?
It does say that they had great cities with high walls when Joshua went in to conquer.
No I haven't seen anything conclusive in the Bible. There's some interesting legends about the walled cities.
Evidently they had the technology to construct a firm bed:
Deuteronomy 3:11 For only Og, king of Bashan, was left from the remnant of the Rephaim. Indeed, his bedstead—it was a bedstead of iron. It is in Rabbah of the Ammonites. Nine cubits is its length, and four cubits is its width according to the cubit of a man.
As for weaponry, they evidently were not that skilled at making a helmet.
1 Samuel 17:49 Then David put his hand into the bag and took a stone from it and slung it. He struck the Philistine on his forehead, and the stone sank into his forehead, and he fell on his face to the ground.
1 Samuel 17:5 A bronze helmet was on his head, and he was clothed with scale body armor; the weight of the body armor was five thousand bronze shekels.