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


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

Requested Product

Title: Nondestructive assessment of wood members from a historic viewing tower

Source: Res. Note. FPL—RN—0349. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 1-10.

Author(s)Ross, Robert J.; Wang, Xiping; Senalik, C. Adam; Allison, R. Bruce; Zhou, Lujing

Publication Year: 2017  View PDF »

Category: Research Notes
Associated Research Project(s):   FPL-4714-MB

Abstract: The state of Wisconsin’s Department of Natural Resources is responsible for operating one of the largest state park systems in the United States. Peninsula State Park, one of the state’s most visited parks, attracts more than one million visitors a year. This park contained one of the most iconic structures in the Wisconsin State Park system, a tall, wooden observation tower that was constructed in 1932. Because of concerns about the structural integrity of several of the large timbers in the tower, it was closed in the spring of 2015 and dismantled in fall 2016 at the request of the Department of Natural Resources. The USDA Forest Service, Forest Products Laboratory, was contacted and asked to conduct an assessment of the timbers after the structure was dismantled. This report summarizes results obtained from our inspection and assessment of the timbers. A brief summary of the nondestructive testing techniques used, observations, and data from tests conducted on the timbers are included.

Keywords: Nondestructive assessment; decay; moisture; timbers

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 4,096 kb(s)

Date posted: 09/21/2017

This publication is also viewable on Treesearch:  view
RITS Product ID: 86853
Current FPL Scientists associated with this product (listed alphabetically)
Ross, Robert J.
Supervisory Research Gen. Engineer
Senalik, Christopher
Research General Engineer
Wang, Xiping
Research Forest Products Technologist

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 »


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 »