Accession Number : AD0715990

Title :   Longtime Performance of Sandwich Panels in Forest Products Laboratory Experimental Unit

Descriptive Note : Forest Service research paper

Corporate Author : FOREST PRODUCTS LAB MADISON WI

Personal Author(s) : Sherwood, G E

PDF Url : AD0715990

Report Date : Nov 1970

Pagination or Media Count : 28

Abstract : Performance of selected sandwich panels in a 12- by 38-foot exposure unit was periodically evaluated for various lengths of service up to 21 years. Such panels were constructed of paper honeycomb cores and a variety of facings including plywood, medium-density and high-density hardboard, particleboard, paperboard, cement asbestos, and aluminum. Observations of seasonal bowing of panels were also made over a 15-year period. After 21 years of exposure, the unit was dismantled and re-erected at a new location. During this move all wall, floor, and roof panels were tested for stiffness and selected panels were tested to failure. The plywood-faced panels exhibited a minimum of movement due to temperature and moisture changes, and retained a high proportion of original stiffness and strength properties. Other panel constructions were less stable under moisture and temperature changes. Only a few panels had a material loss in stiffness and most panels retained a strength well above the design load.

Descriptors :   *SANDWICH PANELS, BENDING, EXPOSURE(PHYSIOLOGY), MECHANICAL PROPERTIES, MOISTURE, PERFORMANCE(ENGINEERING), PLYWOOD, STRUCTURAL PROPERTIES, TEMPERATURE, WEAR RESISTANCE, WOOD

Subject Categories : Wood, Paper and Related Forestry Products
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE