College - Author 1

College of Architecture and Environmental Design

Department - Author 1

Architectural Engineering Department

Degree Name - Author 1

BS in Architectural Engineering



Primary Advisor

Abby Lentz, College of Architecture and Environmental Design, Architectural Engineering Department


The purpose of this study was to begin development of a composite box header that was able to span long openings with minimal deflection. The headers in study were comprised of BamCore side panels, nailed top and bottom each face to a 2x6 top plate, and a header of multiple specified sizes. The 2x6 top plate and headers ranging from a 6x6 to a 6x12 were made up of Douglas Fir-Larch, No.1. Analysis was performed assuming 10d common nailing at top and bottom of the BamCore side panels. Initial analysis of a composite box header was performed and analyzed as a transformed section. Testing ensued after findings from the initial analysis. Testing was performed by fabricating two (2) designed box headers at half scale. The headers that were tested were both analyzed as a 16” deep header with a 6x6 “bottom flange” and 2x6 top plate. At half scale, these headers were 8” deep, with headers and top plates ripped to half scale. The only difference between the two headers tested was that one header had a stiffener placed within the box at midspan—to mimic the splice of the BamCore Panels—and one header did not. The results from testing were compared to the initial analysis to find discrepancies and similarities between analysis and empirical results. This report contains findings from analysis and testing of these materials and sections in order to further develop long-span headers that are used in BamCore panel construction as a use of stronger and sustainable materials.