Trail Ridge (U.S. 34): This road through Rocky Mountain National Park is the highest continuous auto road in the country. Itâs truly an all-American icon â the road itself is listed on the National Register of Historic Places.
Lumber Dimensions. 2x4s are not actually 2 inches by 4 inches. When the board is first rough sawn from the log, it is a true 2x4, but the drying process and planing of the board reduce it to the finished 1.5x3.5 size. Here are the common sizes of lumber, and their actual sizes.
A railing, for example, may be held by 2 x 4 posts spaced every 16 inches or less, or it may have 4 x 4 posts capped by a 2 x 6 spaced as far apart as eight feet. (Note: a 2 x 4 isn't always 2 x 4. Actual size of finished dry lumber is typically 1/2 inch smaller than the nominal size.