Home » Knowledge Base » Knowledge Base Article What's New  |  Site Map 

 

 
   
   
 
 


Today's
Sponsors:


Hoffmann Machine Company

Holz Her U.S. Inc.

Howard S. Twichell Co.

HSD USA

Hvalsoe Sawmill Ltd.

ICA North America

Icy Straits Lumber

IDM

Impact Search and Placement

Industrial Air Solutions

Industrial Maid

Integra Tooling

InTrading

Invicta Woodworking Machines

IpeDepot.com

irsauctions.com

Italpresse

J&P Machines

J. Gibson McIlvain Company

JIT Hardware Supplies, Inc.

JMHsoftware.com

John G. Weber Co.

Joos USA Inc.

KCDw

Kerber Farms and Mill

Keystone Wood Specialties

Keytrix Data Systems

Kiln-direct.com

Kleiberit Adhesives USA, Inc.

Koch Machinery and Systems

Komo Machine, Inc.

Kreg Tool Company

Kremlin

Lacy Cypress Inc.

Laguna Tools

LEUCO Tool Corporation

Lewis Lumber Products

Lobo Machinery Corp.

Loch Logging and Lumber

Logosol

Lumber Resources

MACHINEKING.com

Macoser, Inc.

Mahros

Maine Woods Company

Mann and Parker Lumber Co.

MARTIN Woodworking Machines Corp.

Mastercam - CNC Software

Matthews Mill

Maya Positioning Equipment

Mereen-Johnson Machine Company

Merritt Woodwork

Microvellum

Middle Valley Lumber

Midwest Automation

Midwest Sandright

Mikron Woodworking Machinery

Mill Outlet

Minimax

Mirror Reflections

Mississippi Heart Pine

Miter Clamp

MLS Machinery USA, Inc.

MLS Machinery

Modern Woodworking Magazine

Mohawk Finishing Products

Moldingknives.com

Monarch Machinery

Morbidelli

Moulder Services

Moulder Techniques

Mountainside Wood Products

Multicam, Inc.

NAP Gladu

NCME

Hardware Resources

Hardwood Council

Hardwood Store of N.C. Inc.

Hasko Machines

Heidelberg Flooring

Hendrick

Her-Saf

Hermance Machine Company

High Point Grinding - Total Saw Solutions

Historical Plus Wood



WOODWEB DISCLAIMS any and all RESPONSIBILITY and LIABILITY for the accuracy and application of the information below. Readers agree to evaluate the significance and limitations of the information provided, and accept full responsibility for the application of this information. Read More ...

Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?



Ways to Estimate or Calculate Board Feet       Rule of thumb gets you pretty close, and even methods involving careful measurement are susceptible to basic arithmetic errors. January 11, 2007

Question
Using the example given in the article of May 2, 2001 by Professor Wengert, I calculate: 11.38" width X 10' length divided by 12 gives 9.4833, which rounds to 9 as the closest whole number, giving 9 board feet rather than the 10 board feet indicated in the article. Which figure is correct?

Forum Responses
(WOODnetWORK Forum)
From contributor R:
Well, I just did the math, and assuming you're talking 4 quarter lumber, the 9.483 is right. But the lumber supplier is not going to round it off at 9 BF, he is going to call it rounded off to 10 BF, as they round it up to the next number. They will charge you for 10 BF.



From Professor Gene Wengert, forum technical advisor:
That is indeed an error that no one has found for all these years! It should be 11.40". I have no idea how this happened; good to see that someone is reading and thinking indeed.


From Carl Hagstrom, Systems Administrator at WOODWEB
The value in the article has been changed to 11.40". I agree, Gene... It is good to know that there are those who are keeping their eye on things. As far as how the error might have happened... I'm not sure, but the odds are it was a staff error.


From contributor F:
As to the rounding off, my hardwood suppliers round the board width up to the next full inch for a board that is "x" plus a half inch or more. They round the board's width down to the next full inch for a board width of "X" plus 7/16" or less. They seem to have a knack for measuring the wide end of each board.


From contributor E:
You're right about their knack. Another one they ignore is skip-dressing on s2s and a split in one end.


From contributor B:
My supplier just jams the boards together, and… ah, that looks like 4 feet. Then counts the layers and does the math. I wouldn't mind so much, the plus and minus, except it is always in their favor. Open the stack and some of the boards will be short a foot, but for sure there aren't any long ones.


From contributor D:
When I ran a large shop, we cut up 20,000 b/f a week in lots of species and thicknesses. Typically had about 100,000 b/f on hand. We did a full physical inventory twice a year. When I first heard about the inventory and how the mill guys had to spend 20 hours (!?) to break each unit, measure and count each board, band it back up, and move on, I nearly panicked.

So I determined to sell the bean counter on how the "Whole Stack Method" was the way it was done in the lumber business, and no one in their right mind would count each board. It consisted of measuring the width of the stack, the length, the number of layers and the thickness of the boards. To prove my point, we counted three units by each board, and then the Whole Stack Method, and compared notes. The Whole Stack was within 2% of the board by board, so said bean counter approved, especially when he realized he would not have to pay for all those man hours.

I printed up forms with the Whole Stack Method on top of them, and gave simple instructions, and we were out of there in 3-1/2 hours. I have always wondered if my bogus story on Whole Stack was pure bull, or real, or if other shops and mills counted each board?



From contributor C:
I started doing the "whole stack method" in the 90's and everyone who tried to prove me wrong failed. I was the most accurate from doing it for so long, but with a bit of experience, I had everyone close to your 2% figure. When we received a semi load, the checker tallied it by whole stack method, I compared it to what was billed. If any one unit was way off or the whole load was off, back again to be checked by someone else, but it was a rare case.


From contributor L:
There is mill tally and net tally. Mill tally is the board footage total when green, before drying and shrinkage. Net tally is the board footage after drying - 8-10% more.
Have you reviewed the related Knowledge Base areas below?
  • KnowledgeBase: Knowledge Base

  • KnowledgeBase: Lumber and Plywood

  • KnowledgeBase: Lumber & Plywood: Buying

  • KnowledgeBase: Primary Processing

  • KnowledgeBase: Primary Processing: Yield Formulas




    Would you like to add information to this article? ... Click Here

    If you have a question regarding a Knowledge Base article, your best chance at uncovering an answer is to search the entire Knowledge Base for related articles or to post your question at the appropriate WOODWEB Forum. Before posting your message, be sure to
    review our Forum Guidelines.

    Questions entered in the Knowledge Base Article comment form will not generate responses! A list of WOODWEB Forums can be found at WOODWEB's Site Map.

    When you post your question at the Forum, be sure to include references to the Knowledge Base article that inspired your question. The more information you provide with your question, the better your chances are of receiving responses.

    Return to beginning of article.



    Refer a Friend || Read This Important Information || Site Map || Privacy Policy

    Letters, questions or comments? E-Mail us and let us know what you think. Be sure to review our Frequently Asked Questions page.

    Contact us to discuss advertising or to report problems with this site.

    To report a problem, send an e-mail to our Webmaster

    Copyright © 1996-2008 - WOODWEB ® Inc.
    All rights reserved. No part of this publication may be reproduced in any manner without permission of the Editor.
    Review WOODWEB's Copyright Policy.

    The editors, writers, and staff at WOODWEB try to promote safe practices. What is safe for one woodworker under certain conditions may not be safe for others in different circumstances. Readers should undertake the use of materials and methods discussed at WOODWEB after considerate evaluation, and at their own risk.

    WOODWEB, Inc.
    RR4 Box 265A
    Montrose, PA 18801

    Contact WOODWEB