TY - GEN AU - Lawrence I Knab AU - William L Galligan AU - B A Bendtsen AU - John F Senft C2 - Building Science Series, National Institute of Standards and Technology, Gaithersburg, MD DA - 1980-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.BSS.122 LA - en PB - Building Science Series, National Institute of Standards and Technology, Gaithersburg, MD PY - 1980 TI - A Study of lumber used for bracing trenches in the United States: ER -