ArchrikerHG posted:
wait, so you looked at a 2x2 and couldn't tell that it wasn't a full 2 inches on each side?...
treated lumber is put under pressure to strengthen it. It's the correct size before it's pressurized and treated, and it shrinks some...how do people not know this by the time they are adults? I figured that out on my own when I was like 5.
No.
Pressure treating is forcing chemicals into the lumber by soaking the boards in the chemical solution and then pressurizing it. Those chemicals don't make the wood physically stronger, per se, they make it less susceptible to rot, insects (termites), mold, and waterlogging. Although, to be honest, pressure treated lumber can soak up some water and gets heavy as a motherfker when it's been left outside and rained on - like the 4"x4"x10' posts used in wood fencing that I used to have to haul around...
The reason 2x4s aren't actually 2x4 is that when the wood is "rough cut" at the mill, it might actually measure 2x4 there, but in order to create clean edges and/or square surfaces/corners/edges the boards are planed further, which reduces their dimensions from 2x4 to 1.5 x 3.5 or something similar.
In the "old days" (80 or more years ago) carpenters and builders would get rough sawn wood, that actually measured 2x4, and then they would proceed to plane it to get square, uniform edges/corners, etc.
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