Identification of test methods for determining wood guardrail post integrity.

Details

• Creators:
  Olszko, Evan ; Bender, Donald A.
• Corporate Creators:
  Washington State University. Department of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Guardrails
  • Wood
  • Nondestructive tests
  • Biodeterioration
  • Recommendations
  • Condition surveys
  • Stress Wave Timing (SWT)
• Publication/ Report Number:
  WA-RD 843.1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Washington
• Corporate Publisher:
  Washington (State). Department of Transportation. Research Office
• Abstract:
  Wood guardrail posts are subject to decay and deterioration, yet most DOTs have minimal or no ; inspection procedures in place for wood guardrail posts. The objective of this study was to ; identify nondestructive testing technologies to assess the condition of wood guardrail posts for ; internal decay. The stress wave timing (SWT) technique was judged most promising, and a ; prototype device was developed with an industrial partner. The prototype SWT device was ; validated using wood guardrail posts removed from service. Internal conditions of the posts ; were accurately detected in 86% of the specimens. The device also successfully detected the ; internal condition of all posts inspected during a field test. An inspection procedure was ; recommended for implementation using SWT in conjunction with drilling of posts that identified ; as suspected decay.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29087/dot_29087_DS1.pdf
• File Type:
  [PDF - 1.86 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:49e3a64c1ab2d3192f735773a3bb3dadb71a59fb5527f5f025ed9b87a3ae9ce2