# How is FBM calculated?

**FBM = LF x Width x Thickness ÷ 12**.

## What does FBM in lumber mean?

foot, board measure

**Board foot** can be abbreviated as FBM (for “foot, board measure”), BDFT, or BF. A thousand board feet can be abbreviated as MFBM, MBFT, or MBF. Similarly, a million board feet can be abbreviated as MMFBM, MMBFT, or MMBF.

## How is LRF calculated?

Lumber Recovery Factor is defined as the nominal board feet of lumber recovered per cubic foot of log input to a sawmill (22, 105). Thus, LRF is **the ratio of nominal lumber recovery (N) to the cubic scale of a log (V)**.

## How do you figure a board foot?

**The basic calculation for board feet is:**

- Thickness x Width x Length / 12 = Board Feet. …
- 2 x 4 x 10 / 12 = 6.667 Board Feet.
- A 2 x 10 -16′ has 26.67 board feet:
- 2 x 10 x 16 / 12 = 26.667 Board Feet. …
- PCS x T x W x L / 12 = Board Feet. …
- 84 x 2 x 8 x 12 / 12 = 1,344 Board Feet. …
- 1.25 x 6 x 14 / 12 = 8.75 Board Foot.

## How many BF are in a 2x4x8?

Example 1: A 4/4 board 8 inches wide and 8 feet long has **5.33 bd**. ft. = 5.33 bd.

## How many board feet are in a 2x4x10?

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## What do the letters on lumber mean?

The species of lumber is stamped, and is also abbreviated. Some common examples include: **“S-P-F” represents spruce-pine-fir, a common grouping for some of the Eastern softwoods.** **“DF-L” refers to Douglas fir and Western larch.** **“Hem-fir” stands for Western hemlock and true firs**.

## What does S4S mean in lumber?

surfaced on 4 sides

S4S stands for “**surfaced on 4 sides**“, meaning that the material is finished on all four sides. Dimensional lumber is commonly S4S. S4S finished lumber and dimensional lumber are labeled according to nominal size, or the size of the rough board before it was planed smooth. (For example, 1 x 6 is actually 3/4 x 5 1/2).

## What are the different lumber grades?

The standard grades of hardwood lumber are:

Grade | Trade Name | Min. cutting size |
---|---|---|

Firsts and Seconds | FAS | 4″ x 5′ or 3″ x 7′ |

FAS One Face | F1F | 4″ x 5′ or 3″ x 7′ |

Select | SEL | 4″ x 5′ or 3″ x 7 |

No. 1 Common | 1C | 4″ x 2′ or 3″ x 3′ |

## What does SS mean in lumber?

According to the Western Wood Products Association (WWPA), “**Select Structural Grade** lumber … Select Structural Posts and Timbers are graded primarily for strength, but can be used also for good appearance.

## What does HF mean in lumber?

The abbreviations for framing-grade softwoods, from strongest to weakest, are as follows: Doug Fir, D Fir- L: Douglas fir (L=western larch) SYP: Southern pine. Hem, Hem-fir, H-F: **Hemlock or fir**. S-P-F: Spruce, pine, or fir.

## What does FS mean in lumber?

First And Seconds

FAS. The FAS grade, which derives from an original grade “**First And Seconds**”, will provide the user with long, clear cuttings – best suited for high quality furniture, interior joinery and solid wood mouldings. Minimum board size is 6” and wider and 8′ and longer.