Accession Number:

ADA106562

Title:

Strength and Stiffness of Small Glued-Laminated Beams with Different Qualities of Tension Laminations.

Descriptive Note:

Forest Service research paper,

Corporate Author:

FOREST PRODUCTS LAB MADISON WI

Personal Author(s):

Report Date:

1981-05-01

Pagination or Media Count:

50.0

Abstract:

The objective of this research study was twofold a to determine at what beam depth specially graded 302-24 2 tension laminations are required to attain a 2,400 lbsq. in. design stress b to determine the appropriate design stress for specification-type beams with the regular laminating grades of L1 Douglas Fir-Larch DF-L or No. 1D Southern Pine SP as the tension laminations. The 302-24 grade of lumber required for tension laminations on 24F4 deep beams is a limited resource and is not as readily available as L1 or No. 1D lumber now used as the tension lamination on 24F shallow beams-thus necessitating objective b. The 180 glued-laminated beams evaluated were of near-minimum quality each selected tension lamination had a near-maximum-size, strength-reducing characteristics positioned in the most highly stressed region of the test beams. Author

Subject Categories:

  • Plastics
  • Wood, Paper and Related Forestry Products

Distribution Statement:

APPROVED FOR PUBLIC RELEASE