Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
Email

 

You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Pennsylvania hardwood timber bridges : field performance after 10 years

Source: Proceedings of the Structural Materials Technology VI, an NDT Conference, 14-17 September 2004, Buffalo, New York, USA. American Society for Nondestructive Testing. pp 222-227.

Author(s)Wacker, James P.; Calil, Carlito

Publication Year: 2004  View PDF »

Category: Journal Articles

Abstract: Several hardwood demonstration timber bridges were built by the Pennsylvania Department of Transportation in the early nineteen nineties. These bridge superstructures are of the recently developed stress-laminated deck design-type using Red Oak lumber laminations that were pressure-treated with creosote preservatives. This paper will describe the data acquisition system used to monitor seven of these bridge superstructures between 1997 and 2002 and to characterize any effects of cold (winter) temperatures on their structural performance. Prestressing bar forces, a key performance parameter for stress-laminated bridges, have stabilized after more than ten years in-service and remained above minimum design threshold levels at six of the seven bridges.

Keywords: Timber bridges, hardwoods, performance, stress-laminated bridges, creosote, temperature

File size: 187 kb(s)

This publication is also viewable on Treesearch:  view
RITS Product ID: 16813
Current FPL Scientist associated with this product
Wacker, James P.
Research General Engineer
  

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »


Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »


Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


Nanotechnology

A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »


Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »