by Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station in Broomall, Pa .
Written in English
Bibliography: p. 13.
|Statement||by Leland F. Hanks and Robert L. Brisbin.|
|Series||Forest Service research paper NE -- 423.|
|Contributions||Brisbin, Robert L., United States. Forest Service., Northeastern Forest Experiment Station (Radnor, Pa.)|
|The Physical Object|
|Pagination||13 p. :|
|Number of Pages||13|
Lumber grade yields for graded aspen logs and trees. Broomall, Pa.: Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station, (OCoLC) Green lumber grade yields for aspen were determined for use with the U.S. Forest Service hardwood log and tree grades. The yields for logs are expressed in percent of total lumber tally volume, and those for trees are expressed in board feet. Overruns for the International li4-inch and Scribner log rulesCited by: 1. Recommended Citation. Hanks, L.F. and Brisbin, R.L., "Lumber grade yields for graded aspen [Populus tremuloides] logs and trees" (). Aspen : L.F. Hanks, R.L. Brisbin. For exmple, a select, c~tt log is usually topped by a grade 1 log, a grade i log by a grade 2, and a grade 2 butt log is usually topped by a grade 3 log, The consistency of this 1, 2, 3 order of log occurrence is demonstrated in table 2, for PO5 trees. The particular value of this system is that by: 1.
Hardwood Log Grades and Lumber Grade Yields for Factory Lumber Logs [Leland F Hanks, Glenn L Gammon, Robert L Brisbin, Everette D Rast] on *FREE* shipping on qualifying offers. Forest Service Research Paper NE, Northeast Forest Experiment Station, Broomall, PA;92 pagesAuthor: Leland F Hanks, Glenn L Gammon, Robert L Brisbin. Lumber grade yields for graded aspen [Populus tremuloides] logs and treesAuthor: L.F. Hanks and R.L. Brisbin. attracts to itself logs having similar standard lumber grade yields and values. Each of the three log grades--high, medium, and low--has corresponding lumber grade yields with high, medium, and low average values. The log grade specifications are correlated closely with the specifications for standard hard-wood lumber grades. A board is graded on theFile Size: 2MB. ABOUT THE PRODUCTS. You can contact us for any specific information you need at or email [email protected] Mostly Colorado native woods are processed here; This page is Aspen. These are natural products. The checks and cracks found in wooden logs, posts, timbers and lumber are due to shrinkage as wood dries and occur along the grain.
all log diameters, while the Doyle Rule underestimates the true yield of lumber for smaller logs. The actual yield of lumber from a scaled log will vary with mill technology, wood species and other factors. Log Diameter (inches) 10 15 20 25 30 Predicted Lumber Yield (percent) 40 50 60 70 80 90 D o y l e S c a l e International 1/4" Rule OverrunFile Size: 1MB. An Overview of Lumber Grades and Wood Quality. Lumber is graded based on the quality and appearance of the wood. These depend on various factors like the type of wood used and the number and types of defects, if any. Before we get into the different grades of lumber, let’s take a look at the various defects you may find in a piece of lumber.. Common Lumber Defects. How to predict lumber-grade yields for graded trees. Upper Darby, Pa.: U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, (OCoLC) The National Grading Rule establishes the lumber classifica-tions and grade names for visually stress-graded dimension lumber (Table 6–2) and also provides for the grading of dimension lumber by a combination of machine and visual methods. Visual requirements for this type of lumber are developed by the respective rules-writing agencies forFile Size: KB.