Wood and Other Organic Structural Materials

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McGraw-Hill book Company, Incorporated, 1917 - Adhesives - 478 pages

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Page 442 - Engineers, The American Society of Mechanical Engineers, and the American Institute of Electrical Engineers.
Page xvii - conservation" has been defined1 as "the greatest good to the greatest number — and that for the longest time.
Page 260 - Dense Southern yellow pine shall show on either end an average of at least six annual rings per inch and at least one-third summer wood...
Page 15 - By reasonable thrift, we can produce a constant timber supply beyond our present need, and with it conserve the usefulness of our streams for irrigation, water supply, navigation, and power. Under right management, our forests will yield over four times as much as now.
Page 345 - When distilled by the common method — that is, using an eight (8) ounce retort, asbestoscovered, with standard thermometer, bulb one-half (>) inch above the surface of the oil — the creosote, calculated on the basis of the dry oil, shall give no distillate below two hundred (200) degrees Centigrade, not more than five (5) per cent.
Page 346 - When two hundred (200) grams of the oil are distilled in accordance with the requirements of the specifications for the analysis of...
Page 260 - In cases where timbers do not contain the pith, and it is impossible to locate it with any degree of accuracy the same inspection shall be made over 3 in. on an approximate radial line beginning at the edge nearest the pith in timbers over 3 in. in thickness and on the second inch (on the piece) nearest to the pith in timbers 3 in.
Page 1 - Wood is an indispensable part of the material structure upon which civilization rests ; and it is to be remembered always that the immense increase of the use of iron and substitutes for wood in many structures, while it has meant a relative decrease in the amount of wood used, has been accompanied by an absolute increase in the amount of wood used. More wood is used than ever before in our history.
Page 259 - Strength Values for Structural Timbers," Cline (United States Forest Service, Circular No. 189) ; and elsewhere.2 1 Publications of the National Forest Service. 2 See also report of the Committee on Wooden Bridges and Trestles...
Page 260 - Wide-ringed material excluded by this rule will be acceptable provided that the amount of summer wood as above measured shall be at least one-half. "The contrast in color between summer wood and spring wood shall be sharp, and the summer wood shall be dark in color, except in pieces having considerably above the minimum requirement for summer wood.

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