They are stone tier, but the Castle Wall has 100,000 hits and takes ~10 rockets to bring down. With pure vanilla rates/values that's still four more than it would take to bring down a metal wall. Given that you would be losing a lot more materials, I did add that health modifier so even at 2x you're required to fire 20-22 rockets to bring down a Castle Wall. It comes down to taking some time to figure out how many rockets/c4 above normal you feel is appropriate and adjusting the health accordingly. I do have plans to add an ini value to change the resistance type but that won't be for another month or more while I get through the backlog of things in my todo list. As to your comment about the pike, my 80ish char with an ascendant pike would need around 25,000 swings to bring a Castle Wall down with default health. so I'm not sure there's much concern there.

@hogs Thank you for your time and your answer. Not all modders take a time to explain thing like you just did. Your mod deserves to figure as the first one in the Contest.
The reason of my post: your mod is largely used togheter with Annunaki or other Dino/Difficulty mods. They bring new sets of creatures, much more powerfull than vanilla. And most of them capable of breaking down stone easily. Stone is like thatch in a server that runs Annunaki Genesis. So we need to have metal tiers structures to be able to endure.
Multiplying the health helps a LITTLE, but not much. We really need to adjust it to be like metal tier resistance.
Do you have an ETA for the releasing of the .ini?

You have me there as I haven't had the time to play much in the last two months or even to branch out and see everything out there like Annunaki so I wasn't aware that it made it that bad. I have a ton of flooring pieces to finish so I pushed back the pickups via ini and will likely have those finished by the patch on the 19th. As soon as the pickups are done I'll be starting on the resistance ini so likely the 26th before the most common pieces are in.

Ok, thank you very much.

@hogs I came here to post exactly the same thing @Ahkram did. In PvP servers with high rate, if the parts won´t have metal resistance, even with a 100x multiplier, they will easily break.
In high rate servers with certain creature mods, stone is like thatch.

Sadly, this is not going to be a thing. I had posted that I could pull it off as I could see that the structure settings could be set during run time but with some testing they aren't actually changing once the piece is live in the world. I spent a few hours today trying to make anything work and the stats seemed locked into the same state as everything in the primalitem so that they are untouchable in run time. Or rather you can touch them but the changes have no effect at all. I am going to be adding some things to the infocenter for directing players here to the discussions for voting on important stuff and will making structure settings the first thing you can vote on with the next patch. If people want to go for it, I'm ok with just changing all the pieces to metal tier outright so look for that discussion to pop up some time on Sunday or Monday.