How sturdy is a house built with 2x4 walls? Were they ever used to build 3 story homes?

I see that some basic designed homes are being built with 2x6 exterior walls. From what I understand its mainly for increased insulation. The walls do look a lot stronger, but is that strength needed? I haven't heard of 2x4 built homes falling down so is 2x6 really needed? (I'm thinking of a basic box shaped house with no out of the ordinary design that would require 2x6.)How sturdy is a house built with 2x4 walls? Were they ever used to build 3 story homes?
My 1970 Uniform Building Code allows 2 x 4 studs for exterior and interior load bearing walls for one and two story frame structures. It requires 3 x 4 or 2 x 6 studs to the bottom of the second floor joists, and permits 2 x 4 studs for the two upper stories. I am not sure of today's codes.How sturdy is a house built with 2x4 walls? Were they ever used to build 3 story homes?
I agree with you. The 2x6 walls do allow for mor insulation, but with the house wrap available today I do not see the need for 2x6 walls. There have been may home built with 2x4s and they are still standing. No matter whether you use 2x4's or 2x6's, make sure you caulk and wrap your new home.
2x4 construction is strong and has been proven to be so.2x6 construction is used more and more these days but you need to take into consideration that it also takes from your actual living space.Use what you are most comfortable with especially in high wind areas
Most homes are built with 2x4's if you live in a really cold area you might consider 2x6 walls.
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