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: Pilot study to examine use of transverse vibration nondestructive evaluation for assessing floor systems

Source: Forest products journal. Vol. 52, no. 1 (Jan. 2002).:p. 89-93.

Author(s)Cai, Zhiyong. ; Ross, Robert J.; Hunt, Michael O.; Soltis, Lawrence A.

Publication Year: 2002  View PDF »

Category: Journal Articles

Abstract: Evaluation of existing timber structures requires procedures to evaluate in situ structural members and components. This report evaluates the transverse vibration response of laboratory-built floor systems with new and salvaged joists. The objectives were to 1) compare floor system response to individual member response; 2) examine response sensitivity to location of the forcing function; and 3) compare the response of a floor constructed with new joists to that of a floor constructed with a combination of new and salvaged joists. Several floor systems were constructed from new and salvaged southern pine joists and tested using transverse vibration nondestructive evaluation techniques. The results indicate that joist response, and therefore joist stiffness, can be determined from a system approach with arbitrary location of the impact forcing function. The joist response is greatly dependent on the magnitude and location of the dead load it supports. The frequency of the floor system was reduced when salvaged joists were included in the system. But, it does not appear that individual degraded joists in the system can be detected from this type of test.

Keywords: Floors, Building timbers, Nondestructive testing, Vibration, Wood properties, Joists, Transverse vibration

File size: 166 kb(s)

This publication is also viewable on Treesearch:  view
RITS Product ID: 21971
Current FPL Scientists associated with this product (listed alphabetically)
Cai, Zhiyong
Supervisory Research Materials Engineer
Ross, Robert J.
Supervisory Research Gen. 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 »