Improved grading system for structural logs for log homes

Forest Products Journal

Volumn 54, Issue 9, 2004, Pages 52-62

  Green, D W ^a   Gorman, T M ^a   Evans, J W ^b   Murphy, J F ^a  

^a FOREST PRODUCTS LABORATORY   (United States)

^b UNIVERSITY OF IDAHO   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

MACHINE STRESS RATED (MSR); MODULUS OF ELASTICITY (MOE); TRANSVERSE VIBRATION;

BENDING STRENGTH; COMPRESSIVE STRENGTH; ENVIRONMENTAL PROTECTION; FORESTRY; VIBRATION MEASUREMENT; WOODEN CONSTRUCTION;

WOOD PRODUCTS;

BENDING; CONSTRUCTION; EPA; FORESTRY; LOGS; PINUS; VIBRATION ANALYSIS; WOOD PRODUCTS;

ABIES; ABIES LASIOCARPA; PINUS CONTORTA;

EID: 4944235351     PISSN: 00157473     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (17)

1. American Society for Testing and Materials (ASTM). 2003. Standard methods of static tests of lumber in structural sizes, D 198-02.; Standard practices for establishing structural grades and related allowable properties for visually graded lumber, D 245-00; Standard test methods for specific gravity of wood and wood-based materials, D 2395-02; Standard test methods for establishing clear wood strength values, D 2555-98; Standard practice for establishing design stresses for round timber piles, D 2899-99; Standard practice for establishing stress grades for structural members used in log homes, D 3957-90; Standard test methods for direct moisture content measurement of wood and wood-based materials, D 4442-92; Standard practice for assigning allowable properties for mechanically graded lumber, D 6570-00. In: Annual Book of Standards, Volume 04.10. Wood. ASTM, West Conshohocken, PA.
2. Barbour, R.J. and D.L. Parry. 2001. Log and lumber grades as indicators of wood quality in 20-to 100-year-old Douglas-fir trees from thinned and unthinned stands. Gen. Tech. Rept. PNW-GTR-510. USDA Forest Serv., Pacific Northwest Res. Sta., Portland, OR.
3. Barnard, G. and R. Griffiths. 1998. Strength characteristics of small roundwood in bending and compression from a UK resource. In: Proc. World Conference of Timber Engineering. Vol. 1. pp. 602-609.
4. Curry, W.T. and A.R. Fewell. 1977. The relationships between the ultimate tension and ultimate compression strength of timber and its modulus of elasticity. Current Paper 22/77. Building Res. Establishment, Garston, Watford, UK.
5. Doyle, D.V. and L.J. Markwardt. 1966. Properties of southern pine in relation to strength grading of dimension lumber. Res. Paper FPL-RP-64. USDA Forest Serv., Forest Prod. Lab., Madison, WI. 62 pp.
6. Galligan, W. and K.A. McDonald. 2000. Machine grading: Practical concerns for lumber producers. Gen. Tech. Rept. FPL-GTR-7 (rev.). USDA Forest Serv., Forest Prod. Lab., Madison, WI. 39 pp.
7. Glos, P. 1995. Timber Engineering STEP 1. STEP lecture A5. Centrum Hout, The Netherlands.
8. Green, D.W. and D.E. Kretschmann. 1991. Lumber property relationships for engineering design codes. Wood Fiber Sci. 23(3):436-456.
9. _ and _. 1997. Properties and grading of southern pine timbers. Forest Prod. J. 47(9):78-85.
10. Hope, M. 1993. Log grading: Development and practical applications. In: Proc. Log Home Design, Engineering, and Marketing Conference. WUD Pub. No. 93-1. T. Gorman, ed. College of Forestry, Wildlife and Range Sci., Univ. of Idaho, Moscow, ID.
11. Kretschmann, D.E. and D.W. Green. 1999. Mechanical grading of oak timbers. J. Mat. Civil Engineering 11(2):91-97.
12. Murphy, J.F. 2000. Transverse vibration of a simply supported frustum of a right circular cone. J. Test Eval. 28(5):415-419.
13. Ranta-Maunus, A. (ed). 1999. Round small-diameter timber for construction. Final report. Project FAIR CT 95-0091. VTT publication 383. Tech. Res. Center of Finland, Espoo, Finland. 210 pp.
14. Smulski, S.G, ed. 1997. Issue on machine-graded-lumber. Wood Design Focus 8(2):1-24.
15. Timber Products Inspection, Inc. (TP). 1987. Log home grading rules, including supplements 1-5. TP, Conyers, GA.
16. Wang, X., R.J. Ross, J.A. Mattson, J.R. Erickson, J.W. Forsman, E.A. Geske, and M.A. Wehr. 2001. Several nondestructive evaluation techniques for assessing stiffness and MOE of small-diameter logs. Res. Paper FPL-RP-600. USDA Forest Serv., Forest Prod. Lab., Madison, WI. 12 pp.
17. Wolfe, R and C. Moseley. 2000. Small-diameter log evaluation for value-added structural applications. Forest Prod. J. 50(10):48-58.