Strength of Log Bridge Stringers After Several Year's Use in Southeast Alaska.

reportActive / Technical Report | Accession Number: ADA078792 | Open PDF

Abstract:

Bending tests of 28 untreated log stringers from 12-year-old native timber bridges in southeast Alaska showed significant reductions in strength due to decay. Compared to results on fresh logs, strength reduction was about 25 percent, and could be predicted based on the loss in section modulus due to decay. Log stiffness was not significantly affected. Results will be helpful to engineers with responsibility of rating the load capacity of bridges having untreated log stringers. Author

Author(s):
Moody, R. C. ; Tuomi, R. L. ; Eslyn, W. E. ; Muchmore, F. W.
Author Organization(s):
FOREST PRODUCTS LAB MADISON WIS
Descriptive Note:
Forest Service research paper,
Pagination:
0004

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
FSRP-FPL-346
 Subject Terms
Joint Capability Areas:
JCA_4.6.1_General Engineering; JCA_4.6_Engineering; JCA_6.4.1_Secure Information Exchange; JCA_6_Net Centric; JCA_6.4_Information Assurance; JCA_3.2_Engagement; JCA_3_Force Application; JCA_5.3_Planning; JCA_5_Command and Control
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*BRIDGES, LOADS(FORCES), ALASKA, BENDING, STRENGTH(MECHANICS), ROADS, LUMBER, DECAY, WOOD
Field(s)/Group(s):
Civil Engineering
Keyword(s):
Load capacity, Logs(Trees), Spruce
Report Date:
1979 Jan 01