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Originally constructed as part of the Howard Hughes Industrial Complex, Buildings 14, 15, and 16 (the Cargo Building Complex) were designed by architect Henry L. Gogerty as fabrication and assembly spaces for the Hercules HK-4 aircraft, also known as the Spruce Goose. This complex is historically significant for its connection to this monumental aircraft, and the early use of custom glued-laminated timbers as the primary structural system. In rehabilitating the hangar, structural engineers needed to know wood species, condition, and repair options for the glued-laminated arches so that analysis and design of repairs and seismic strengthening could be completed. This paper describes the timber assessment that was conducted to provide the input for the structural analysis and subsequent repairs. Once the condition assessment was completed, structural analysis showed that the curved glued-laminated arches required reinforcement. Fully threaded structural screws were selected as the reinforcement, rather than steel side plates bolted to the laminated timbers, preserving the sleek modern appearance of the hangar interior. Optimization of the placement, size, type, and number of screws needed to resist shear and radial tension is described in the paper.

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Assessment of the Hangar Where the Largest Wooden Airplane in the World Was Built

  • 会议论文

  • 发表日期：

    2026年

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  • Ron Anthony,
  • Douglas Porter,
  • Kent Slade Diebolt,
  • Richard Schmidt

摘要

Originally constructed as part of the Howard Hughes Industrial Complex, Buildings 14, 15, and 16 (the Cargo Building Complex) were designed by architect Henry L. Gogerty as fabrication and assembly spaces for the Hercules HK-4 aircraft, also known as the Spruce Goose. This complex is historically significant for its connection to this monumental aircraft, and the early use of custom glued-laminated timbers as the primary structural system. In rehabilitating the hangar, structural engineers needed to know wood species, condition, and repair options for the glued-laminated arches so that analysis and design of repairs and seismic strengthening could be completed. This paper describes the timber assessment that was conducted to provide the input for the structural analysis and subsequent repairs. Once the condition assessment was completed, structural analysis showed that the curved glued-laminated arches required reinforcement. Fully threaded structural screws were selected as the reinforcement, rather than steel side plates bolted to the laminated timbers, preserving the sleek modern appearance of the hangar interior. Optimization of the placement, size, type, and number of screws needed to resist shear and radial tension is described in the paper.