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Wood Species Identification and Field Grading

Project Information

Project ID: 
FHWA-PROJ-08-0026
Project Status: 
Completed
Start Date: 
Monday, September 8, 2008
End Date: 
Tuesday, September 30, 2014
FHWA Program: 
Infrastructure
FHWA Subprogram: 
Structures
FHWA Topics: 
Roads and Bridges--Structures
TRT Terms: 
Timber; Wooden Bridges; Infrastructure; Bridges; Research; Covered Bridges
FHWA Discipline: 
Structures
TRB Subject Area: 
Bridges and other structures, Materials

Contact Information

First Name: 
Sheila
Last Name: 
Duwadi
Telephone: 
(202) 493-3106
Email Address: 
Team: 
Infrastructure Analysis and Construction Team
Office:
Office of Infrastructure Research and Development
Office Code: 
HRDI-20

Project Details

Project Description: 

The strength of the timber found in covered bridges can vary considerably, not only because of age and condition, but also because of species and grade. For evaluation purposes, it is necessary that the design values for existing wood members be determined with as much accuracy as possible. The current practice is to assign wood values for strength and moduli from existing specifications, but oftentimes these values are inaccurate for the specific condition and can result is an unreliable assessment of the structure. This could be hazardous where the type, source, and grade of the existing wood are uncertain. This study will develop methodologies for species identification and approximated field grading of timbers.

Goals

The objective is to develop methodologies for easier identification and design value estimation in grading of wood species onsite.

Deliverables

Deliverable Name: 
Species Identification and Design Value Estimation of Wooden Members in Covered Bridges
Deliverable Type: 
Research report or guidelines
Deliverable Description: 
The product will be a guidance document that can be used by bridge engineers.