# How Wide Is A 2×8

## What is a 2x8 dimension?

2x8. 1-1/2" x 7-1/4" via

## Why is lumber not the actual size?

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). The nominal measurement is made before the lumber is surfaced. via

## What are the actual dimensions of a 6x6?

The lumber industry defines standard wood post sizes as 4x4 or 6x6. The outside dimensions of the standard 4x4 measure 3-1/2" x 3-1/2", and the outside dimensions of the standard 6x6 measure 5-1/2" x 5-1/2". via

## Why are 2x4s not actually 2x4?

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. via

## How wide is a 1x6 board?

The same is true of pine. A 1x6, for example, actually measures 3/4" x 5 1/2". In this case, the planing is necessary for a smoother surface, so that the board could be used for interior applications. via

## How wide is a 2x4 Really?

A piece of surfaced (sanded smooth) 2x4 lumber actually measures 1½ inches thick and 3½ inches wide. In rough-cut condition, a 2x4 is slightly less than 2 inches thick and approximately 4 inches wide. When wood is milled from a rough to a smooth surface, it loses about ¼-inch from each of its four sides. via

## How wide is a 5 quarter board?

Each quarter refers to 1/4 inch of thickness, meaning that a 5/4 board is roughly 1 1/4 inches thick. If your project calls for a piece that is exactly 1 inch thick, you'll want to purchase a 5/4 board and mill it down to the proper size using a jointer/planer. via

## Why did lumber sizes change?

Lumber size standards came into being almost a century ago to meet the need for a common understanding between the mill and markets that were separated by increasing distances of rail or water transportation. Early concepts called for rough lumber to be of full nominal size, often in the dry condition. via

## Why is lumber 1/2 inch smaller?

During this process, it shrinks as the moisture in the wood is removed and the wood cells shrink. Once the drying is complete, the boards are then planed to a standard size. Hence, what started out as a 2 x 4 now measures 1 1/2 inches x 3 1/2 inches. via

## Are 4x4 actually 3.5x3 5?

This is 3.5x3. 5. A standard 4x4 post will measure 3.5x3.. As a standars 2x4 is 1.5x3. via