Allowable bending stresses of wood for use in portable wood ladders
By: [by Fred Werren].
Contributors: Forest Products Laboratory (U.S.); United States. Forest Service.
Series: USDA Forest Service general technical report FPL -- 5.; General technical report FPL -- 5.
Publisher: Dept. of Agriculture, Forest Service, Forest Products Laboratory
Published: 1975
Place of publication: Madison, Wis
Language: eng
Subjects: Strains and stresses; Ladders -- Standards; Wood
Notes: Cover title.