A study of lumber used for bracing trenches in the United States /

Bibliographic Details
Corporate Authors:	Center for Building Technology, United States. National Bureau of Standards, United States. Occupational Safety and Health Administration
Other Authors:	Knab, Lawrence I.
Format:	Government Document Book
Language:	English
Published:	Washington : Dept. of Commerce, National Bureau of Standards : for. sale by the Supt. of Docs., U.S. Print. Off, 1980.
Series:	NBS building science series ; 122.
Subjects:	Lumber > Inspection. Shoring and underpinning. Lumber > Standards.

Description
Item Description:	Report to Occupational Safety and Health Administration, Department of Labor. Issued Mar. 1980.
Physical Description:	218 pages in various pagings : illustrations ; 28 cm.
Bibliography:	Bibliography: p. D-20.