2×4 Quality Selection Tips – How to Pick Straight 2x4s

Often they can be used in a variety of framing applications where straightness and appearance is not as critical.

This said, when selecting 2x4s its best to pick out quality ones when possible, particularly for framing in doors and windows, and corners, where straight and plumb walls are critical. Also keep in mind that 2x4s actually measure 1.5 x 3.5 inches.

So what do you look for in a quality 2×4? Well first, check to see if the board is crowned, bowed, or twisted in any way. If it is, you may want to put it aside. To see if a 2×4 board has a crown turn it on its edge and look down the length of it for a hump.

Then roll the board over 180 degrees and again look for a crown on the opposite side. To check if the 2×4 board is bowed, turn it on its flat side and see if it is bent in any way. While inspecting a 2×4 for crowning and bowing, also see if the board has any twists in it by again looking down the length of it. In addition, examine the end grain of the 2×4 to see if it has the potential to eventually twist.

If you can see vertical lines in the grain, then the 2×4 should be stable and not be apt to twist. 2×4 boards that are cut out of the center of the tree have the vertical band lines and are typically the most stable.

Also examine the edges of the board for damages. These defects are known as wane defects. Although not the prettiest of lumber, this lower quality 2×4 type is acceptable for using as packing studs up against straight door or window frame studs.