Report ..., Volumes 18-25

Front Cover
U.S. Government Printing Office, 1931
 

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Page 42 - Dimension. All yard lumber except boards, strips, and timbers; that is, yard lumber 2 Inches and less than 5 inches thick, and of any width. Strips. Yard lumber less than 2 inches thick and less than 8 inches wide.
Page 5 - For loads acting perpendicular to the grain, the margin between the edge toward which the bolt pressure is acting and the center of the bolt or bolts nearest this edge should be at least four times the bolt diameter. The margin at the opposite edge is relatively unimportant.
Page 146 - L,jD ratio and species group, taken from this table, is the safe working stress at that ratio for joints with metal splice plates. When wood splice plates are used, each one-half the thickness of the main timber, 80 percent of...
Page 144 - Select from table 27 the basic stre&s in compression perpendicular to the grain for the particular species of wood and reduce in accordance with the service condition if the joint is to be used in other than a dry, inside location. Call this stress Si. (2) Calculate the ratio of the length of bolt in the main member to the bolt diameter (L/D) . Select the percentage r of basic stress from table 29 for the appropriate L/D. (3) Select the diameter factor v for the appropriate size of bolt (p.
Page 24 - Minn., by the Forest Service, US Department of Agriculture, in cooperation with the University of Minnesota.
Page 42 - Surfaced Lumber. — Lumber that is dressed by running through a planer. It may be surfaced on one side (SIS), two sides (S2S), one edge (S1E), two edges (S2E), or a combination of sides and edges (S1S1E), (S2S1E), (S1S2E), or (S4S).
Page 38 - Fig. 21 allowable load per bolt in a direction at inclination 6 with the direction of the grain P = allowable...
Page 1 - The family is the unit of American life and the home is the sanctuary of moral inspiration and of American spirit. The true conception of America is not a country of 1 10,000,000 people, but a nation of 23.000,000 families living in 23,000,000 homes. I pledge my services to these homes.

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