 Embankments shall be formed of successive layers of not more than twelve (12) inches in thickness, each layer to be thoroughly rolled by a roller weighing not less than two tons. All trees, stumps, and roots within the roadbed and on slopes shall be grubbed...  Report - Seite 173von Maryland Geological Survey - 1902Vollansicht - Über dieses Buch
 | Massachusetts - 1895 - 468 Seiten
...The embankment shall be formed of successive layers of not more than twelve (12) inches in thickness, each layer to be thoroughly rolled by a roller weighing not less than two (2) tons. All measurements of earthwork are to be made in excavation. All surfaces and slopes... | |
 | Massachusetts. Highway Commission - 1895 - 96 Seiten
...The embankment shall be formed of successive layers of not more than twelve (12) inches in thickness, each layer to be thoroughly rolled by a roller weighing not less than two (2) tons. All measurements of earthwork are to be made in excavation. All surfaces and slopes... | |
 | United States. Bureau of Public Roads - 1901 - 880 Seiten
...Embankments shall be formed of successive layers of not more than twelve (12) inches in thickness, each layer to be thoroughly rolled by a roller weighing not less than two tons. All trees, stumps, and roots within the roadbed and on elopes shall be grubbed up and... | |
 | Maryland Geological Survey - 1902 - 690 Seiten
...gravel should be about 1% inches, and no gravel to be used the longest dimensions of which is over 2'/2 inches. Whenever it is possible to obtain other gravel...be thoroughly rolled by a roller weighing not less tfian 5 tons. SHOULDERS. To prevent the gravel irom spreading, it should be banked by the best earth... | |
 | Maryland Geological Survey - 1902 - 700 Seiten
...should be about l'/4 inches, and no gravel to be used the longest dimensions of which is over 2'/2 inches. Whenever it is possible to obtain other gravel...be thoroughly rolled by a roller weighing not less tKan 5 tons. SHOULDERS. To prevent the gravel from spreading, it should be banked by the best earth... | |
 | Maryland Geological Survey - 1902 - 688 Seiten
...gravel should be about 1% inches, and no gravel to be used the longest dimensions of which is over 2% inches. Whenever it is possible to obtain other gravel...be thoroughly rolled by a roller weighing not less tlian 5 tons. SHOULDERS. To prevent the gravel irom spreading, it should be banked by the best earth... | |
 | 1908 - 718 Seiten
...Embankments shall be formed of successive layers of not more than twelve (12) inches in thickness, each layer to be thoroughly rolled by a roller weighing not less than two tons. All trees, stumps, and roots within the roadbed and on slopes shall be grubbed up and... | |
 | Harwood Frost - 1910 - 576 Seiten
...Abstracted from Office of Public Roads Bulletin No. 29. June, 1907. twelve (12) inches in thickness, each layer to be thoroughly rolled by a roller weighing not less than two tons. All trees, stumps, and roots within the roadbed and on slopes shall be grubbed up and... | |
 | Harwood Frost - 1910 - 576 Seiten
...Embankments shall te formed of successive layers of not more than twelve (12) inches in thickness, each layer to be thoroughly rolled by a roller weighing not less than two tons. All trees, stumps, and roots within the roadbed and on slopes shall be grubbed up and... | |
 | 1915 - 794 Seiten
...Embankments shall be formed of successive layers of not more than twelve (12) inches in thickness, each layer to be thoroughly rolled by a roller weighing not less than two tons. All trees, stumps, and roots within the roadbed and on slopes shall be grubbed up and... | |
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