 | American School (Chicago, Ill.) - Engineering - 1906 - 588 pages
...A very brief discussion of some of these properties or characteristics of timber will now be given in order that we may see what peculiarities of structure...will be indented by a pressure of 1,500 pounds, and soft woods require even less. Maple, oak, elm and hickory are very hard ; ash, cherry, birch and walnut... | |
 | American School (Lansing, Ill.) - Architecture - 1907 - 456 pages
...A very brief discussion of some of these properties or characteristics of timber will now be given in order that we may see what peculiarities of structure...will be indented by a pressure of 1,500 pounds, and soft woods require even less. Maple, oak, elm and hickory are very hard ; ash, cherry, birch and walnut... | |
 | Architectural drawing - 1910 - 476 pages
...A very brief discussion of some of these properties or characteristics of timber will now be given in order that we may see what peculiarities of structure...will be indented by a pressure of 1,500 pounds, and soft woods require even less. Maple, oak, elm and hickory are very hard ; ash, cherry, birch and walnut... | |
 | Gilbert Townsend - Building - 1913 - 284 pages
...A very brief discussion of some of these properties or characteristics of lumber will iiow be given in order that we may see what peculiarities of structure...will be indented by a pressure of 1,500 pounds, and soft woods require even less. Maple, oak, elm, and hickory are very hard ; ash, cherry, birch, and... | |
 | Architecture - 1917 - 522 pages
...A very brief discussion of some of these properties or characteristics of lumber will now be given in order that we may see what peculiarities of structure...will be indented by a pressure of 1,500 pounds, and soft woods require even less. Maple, oak, elm, and hickory are very hard ; ash, cherry, birch, and... | |
 | United States. Army. Corps of Engineers Board on engineer troops - Engineer troops - 1917 - 904 pages
...If a block of wood is struck with a hammer, the resulting impression or dent will be deep or shallow according as the wood is soft or hard. A wood is said...pressure of about 3,000 pounds per square inch to make a "dent" one-twentieth of an inch deep. A hard wood requires only about 2,500 pounds to produce the... | |
 | Military engineering - 1917 - 1124 pages
...If a block of wood is struck with a hammer, the resulting impression or dent will be deep or shallow according as the wood is soft or hard. A wood is said...pressure of about 3,000 pounds per square inch to make a "dent" one-twentieth of an inch deep. A hard wood requires only about 2,500 pounds to produce the... | |
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A very brief discussion of some of these properties or characteristics of timber will now be given in order that we may see what peculiarities of structure or of growth cause them. Hardness. If a block of wood is struck with a hammer when lying on a bench,... 