Hi, I have a house with a crawlspace (12" deep). The floors are substantially dropping at the outer edges. The portion of the house that has a crawl space is roughly 20'x20' and the 2 far walls(front and back) do not appear to be sagging. Originally we thought the footings to be sagging but upon further inspection (cutting a hole in the floor) we found the floor joists to be substantially damaged. Being that there are a few load bearing walls in the house we are wondering what our options are as far as replacing the damaged joists. The house is a single family ranch and based on what we've seen (3 joists in the middle of the sag) we feel that a majority of the joists for the crawl spaced area may need to be replaced. We are wondering what our options are/hoping we have some? Any advice would be much appreciated.