Don't know the answer to your question, but I'm surprised that in coastal SC they are doing wood frame construction. In FL, almost every house now is done with block construction because of water and wind.

For water we have to build all living spaces at least one foot above Base Flood Elevation (BFE). We're going 3 feet above BFE. For wind - there are bolts and straps coming out from the top of the concrete piers. (CMUs with rebar inside and filled with concrete) which are bolted to and nailed to the sill plate and beams. Then there are Hold Downs which are attached to studs in certain locations, bolted from the top of the bottom plate to 2 feet into the concrete piers. And there are straps that go from the bottom to the top, and there are really close nailing patterns specified for all sheathing.

edit: the footings are continuous footings with rebar throughout - and that rebar is all tied together and then tied to the rebar that is in the piers. The bolts and straps at the top of the rebar is hooked to horizontal rebar 24" (at least) down from the top of the piers.

I've been quite fascinated with how this is all done here.

We too have to build above BFE and have all the bolts, straps, etc too. And my second floor is wood frame, but my main floor is concrete block construction.

Here about 1/4 or less of the houses are built with concrete block walls for the first floor, the rest use piers. Even if you have concrete block walls there have to be numerous breakaway vents to the outside, and the space can't be conditioned. So most people opt for piers and then use panels of slats, either vertical, horizontal, or louvered, between the exterior piers for privacy and looks. The panels have to be breakaway. Water has to be able to flow through the bottom level no matter which way you build.

We're building a small lake house in the midlands of South Carolina, continuous footings with rebar and split-faced block crawlspace foundation. The termite treatment was applied during the footing/foundation process before there was any wood delivered to the site.

We're building in coastal Georgia (wood-frame construction also) and, same as omelet, termite treatment is applied during the footing/foundation process to the entire site.

Ours was part of the build. The builder hired a company to apply the treatment during the footing/foundation process as well.

Ours was a two part treatment. The first was in the holes before the concrete footings were poured. Then the second part was after we finished the house and grading was complete.

Im sure part of it depends on your foundation. We're doing pier and beam, we have to get them to come out every time a piece of earth is "settled". So they sprayed the crawl space as the subfloor was going down. They sprayed the garage just before the slab was poured, they are going to spray the back porch just before that slab is poured. They just want to spray on dirt that won't really be disturbed anymore. We asked if they needed to spray in the footer/pier holes and they said no. We verified that with them several times before moving on. It's not a mom and pop shop we're dealing with either.