## What is 8×4 lumber?

So, a “4/4” board is four quarters, or 1 inch thick, an “8/4” board is eight quarters, or 2 inches thick, a “10/4” board is ten quarters, or 2.5 inches thick, etc. Board Foot: Rough sawn lumber is usually sold by the “board foot” (bd.

**Why is lumber measured in quarters?**

Rob Johnstone: The “quarter system” is a metric for roughsawn lumber. It simply refers to how many 1/4-inches thick the rough stock is. For example, 4/4 (read out loud as four-quarters) is 1-in. thick in the rough.

**Why are lumber sizes wrong?**

Maybe you’ve noticed that lumber sizes are often misleading. The “nominal” cross-section dimensions of a piece of lumber, such as 2 X 4 or 1 X 6, are always somewhat larger than the actual, or dressed, dimensions. The reason is that dressed lumber has been surfaced or planed smooth on four sides (called S4S).

### What thickness does wood come in?

One board foot is equal to 144 cubic inches of wood. In other words, a board that is 1 inch thick, and 12 inches wide and long contains one board foot of hardwood lumber….Hardwood Sizing.

Nominal Thickness | S1S | S2S |
---|---|---|

3/4 inch | 5/8 inch (16 mm) | 9/16 inch (14 mm) |

1 (4/4) inch | 7/8 inch (22 mm) | 13/16 inch (21 mm) |

**What is the thickness of 8 4 wood?**

2 inches

A “quarter” system is commonly used in the hardwood lumber industry when referring to thickness. 4/4 refers to a 1 inch thick board, 6/4 is 1-1/2 inch, 8/4 is 2 inches, and so on.

**Why is a 2×4 not 2×4?**

The simple reason why 2×4 is not 2 inches by 4 inches is that lumber mills trim off rough or warped surfaces of a 2×4 to give it a more polished and finished look. By planning the lumber on all four sides, the original 2×4 is now reduced to 1 ½ inches by 3 1/2 inches.

## What does FAS mean in lumber?

first and second grade

FAS: (first and second grade) This stands for the highest grade of lumber. FAS grade includes some defects but is considered the premier lumber for furniture and cabinet making.

**Why did 2×4 become smaller?**

Now, most timber is milled and planed to give it a little more of a finished look, and a little more of a consistent size and profile. Because of this extra milling, a 2×4 no longer measures a full 2 inches by four inches.

**Why is a 2×4 only 1.5×3 5?**

The 2×4 refers to the rough-cut green wood: it shrinks during drying, then the dried wood is planed smooth, so the finished lumber is supposed to end up at 1.5″x3. 5″. While it doesn’t really shrink that much, the mills get more usable finished 2×4’s from a given tree if they cut them slightly smaller to begin with.

### What is s4 lumber?

S4S Surfaced four sides. Lumber Sizes. A “quarter” system is commonly used in the hardwood lumber industry when referring to thickness. 4/4 refers to a 1 inch thick board, 6/4 is 1-1/2 inch, 8/4 is 2 inches, and so on. Quarter Size.

**What is the actual size of a 4×8?**

North American Standard 4-by Lumber

NOMINAL SIZE (INCHES) | ACTUAL SIZE (INCHES) | ACTUAL SIZE (MM) |
---|---|---|

4 x 6 | 3 1/2 x 5 1/2 | 89 x 140 |

4 x 8 | 3 1/2 x 7 1/4 | 89 x 184 |

4 x 10 | 3 1/2 x 9 1/4 | 89 x 235 |

4 x 12 | 3 1/2 x 11 1/4 | 89 x 286 |

**What does S3S mean when buying a board?**

The SxS designation simply refers to how many sides have been pre-surfaced. S2S= surfaced two sides, S3S = surfaced three sides and s4s = surfaced four sides.