Jared I said that and added Generally
. There are always exceptions to rules .
Depends has been the catch word on most of my post today . As you guys always have another idea , which is good , not a ping on anyone
. But your all thinking of ways around , under , beside stuff. Sort of not what we builders do , again not a ping .
On your 24 " / 16" OC question , we frame 2x6 walls 16"OC . The reason being 24" OC tends to get wavy walls outside , and mostly inside on the drywall . You can see the drywall bow in and out between the studs . Yes you could hang 5/8 " drywall but in the end pay it here,, pay it there ,,, all about the same $ when a guy is done .
Same sort of deal with joist 16 ' OC 3/4 ' ply ok subfloor . 24"OC you'll need to go thicker like 5/4 " ( one inch ) T+G plwood or 1 1/2 " T+G lumber . So you save on joist , spend more one subflooring . On remodels I'm all for sticking with what exist , IF, it is still avaible .
You tend to get different seasonal movements out of different type floor systems . Especially if a room flows like a living room extention . .If you can break it at a door way , and floor type ,IE carpet to hardwood ok . You can get away with that .
Could you go 16" OC on 2x4 walls , depends where you live , area codes . Would I do it ,,,no way
, client wouldn't like it in the end .
Some other factors also weigh in but again to long a message.