# board foot formula

There is a board footage calculator, log volume calculator, tree value calculator and lumber and log weight calculator here. Discover how Icynene spray foam insulation can add value to your energy-efficient home designs. COPYRIGHT ICYNENE 2019. ft.) is the unit of measurement for hardwood lumber 1" or thicker. It is not the way that most of the industry uses. June 24, 2001, KnowledgeBase: Primary Processing: Sawmilling, KnowledgeBase: Primary Processing: Woodlot Management, KnowledgeBase: Primary Processing: Yield Formulas. For example, a 10-inch-wide, 3/4-inch-thick board that measures 96 inches in length would come out to 5 board feet: (96 x 10 x .75)/144 = 5. Here’s an example: you have a 1 1/2" thick board that is 5 1/2" wide and 8 feet long - the formula is 1.5 x 5.5 x 8 divided by 12. Then 5 x 1.5 is 7.5. The Doyle scale is one of the most commonly used formulas for calculating board feet. Knowing how to measure board feet is not necessarily expected of you as a homeowner, but having an idea how to calculate the board feet can help you roughly price out your home insulation project. But I live in the real world and play by the rules. Knowing how to measure a board foot is useful because not only do you know how large of a space you need to insulate, but also it can give you a rough idea of how much spray foam insulation can cost. Para. 1. Then multiply the SM by the thickness--x1 for 4/4; x1.25 for 5/4; x1.5 for 6/4; etc. It is sound business practice.
I know how to figure board feet on 4/4, but what thickness do I use for 5/4 and 6/4 in the formula? In fact, when grading, you get the SM first, grade the piece, and then finally worry about the BF. Calculate the number of board feet in one of the boards:$$\text{Board feet in one board} = {2.5 × 4.5 × 2 \over 12} = \text{1.875 bd. If you have the SM already, then why go back and do all the multiplication again? (The reason involves rounding errors.). However, in your example, if these are widths, we use the width (inches and fractions) and do not round the width. Probably illegal, to say the least! I just had some poplar logs cut up into 4/4, 5/5 and 6/4. How to measure a board foot is a pretty simple equation. If I had been cheating people, I would have been out of business 20 years ago. Heres an example: you have a 1 1/2" thick board that is 5 1/2" wide and 8 feet long - the formula is 1.5 x 5.5 x 8 divided by 12. It is important to round the answer after you multiply the width and length and divide by 12. So in the end, it will all come out in the wash, no appreciable difference. What's a board foot, anyway? Board footage, or how much wood by volume the board contains, can be found using the calculator above, or by using a simple formula. Example: a beam 8"x8"x20'. Board foot is a volume measurement used for lumber, where. Incidentally, if you use the incorrect method you run the risk of actually charging the customer for more footage than is really there. These are band saw rough-cut sizes. I am not cheating anybody, as you have alleged. Then divide the total by 144 for the total board footage of a given board. Perhaps this will help. Spray Foam Insulation | Commercial & Residential | Energy Efficient. I know what you are saying and I agree, to a point. To use an above example: 3. Q. 2 x 12 board, one foot long equals one square foot. Wholesale Mahogany and Hardwoods Since 1843. an 8"x8"x19' beam rounded before is 104 bf, rounded after, is 101 bf. 5.5x10/12 x1.5=6.875. Icynene warrantees its insulation for the life of the building. For your home project, take the measurements to get the square footage of the wall cavities, and multiply that number by the thickness/depth. Decking Sales: (800) 589-6637. Regarding the measurement of lumber in a bulk load (that you mentioned in your response), the block tally is used, but again, each piece is measured, rounded, and then the total multiplied by the thickness. Board feet (BF) is a measurement of volume which the a Board foot is 1 foot by 1 foot by 1 inch thick volume. ft.}$$ Multiply by the total number of boards (10) to get the total number of board feet:\text{Total board feet = 1.875 × 10 = 18.75 bd. For pieces that have a BF right on the half, you round up to the closest whole number the first time and then down the next time. an 8"x8"x20' beam rounded before is 104 bf, rounded after, is 107 bf. Remember, the cost of spray foam insulation based on solely board feet does not consider labor costs for installation by a certified professional.

Is your home’s insulation an invitation to pests? If I gave away this much lumber in every beam I sold I would have been out of business 20 years ago.

Knowing how to measure a board foot is useful because not only do you know how large of a space you need to insulate, but also it can give you a rough idea of how much spray foam insulation can cost. The basic calculation for board feet is: Thickness x Width x Length / 12 = BDFT 1" T x 12" W x 1' L / 12 = 1 BDFT.

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