 | United States. Bureau of Mines - 1909 - 908 Seiten
...sufficient number of pieces of slate of any size to cover 100 square fee.t of roof, allowing a 3-inch lap. The sizes of slate in a square vary from 24 by...varies from 85 to 686, according to the size of the piece. The ordinary thickness of a piece is from one-eighth to three-sixteenths of an inch. The approximate... | |
 | United States. Bureau of Mines - 1908 - 906 Seiten
...shipped in carload lots of from 50 to 100 squares per carload, according to the size of the pieces. The sizes of slate in a square vary from 24 by 16...85 to 686, according to the size of the pieces. The thickness of ordinary slate is from one-eighth to three-sixteenths of an inch, slates less than one-eighth... | |
 | 1908 - 916 Seiten
...shipped in carload lots of from 50 to 100 squares per carload, according to the size of the pieces. The sizes of slate in a square vary from 24 by 16...85 to 686, according to the size of the pieces. The thickness of ordinary slate is from one-eighth to three-sixteenths of an inch, slates less than one-eighth... | |
 | United States. Bureau of Mines - 1911 - 954 Seiten
...a square ranges from 7 by 9 inches to 16 by 24 inches, and the number of pieces in a square ranges from 85 to 686, according to the size of the pieces....is from one-eighth to three-sixteenths of an inch, and the approximate weight per square is about 650 pounds. The slate is generally shipped in carload... | |
 | American Institute of Architects. Structural Service Dept - 1918 - 252 Seiten
...a square ranges from 7 by 9 inches to 16 by 24 inches, and the number of pieces in a square ranges from 85 to 686, according to the size of the pieces. The ordinary thickness of a piece is from y& to A inch, and the approximate weight per square is about 650 pounds. — From "Mineral Resources... | |
 | 1911 - 952 Seiten
...a square ranges from 7 by 9 inches to 16 by 24 niches, and the number of pieces in a square ranges from 85 to 686, according to the size of the pieces....is from one-eighth to three-sixteenths of an inch, and the approximate weight per square is about 650 pounds. The slate is generally shipped in carload... | |
 | United States. Bureau of Mines - 1911 - 1048 Seiten
...a square ranges from 7 by 9 inches to 16 by 24 inches, and the number of pieces in a square ranges from 85 to 686, according to the size of the pieces....is from one-eighth to three-sixteenths of an inch, and the approximate weight per square is about 650 pounds. The slate is generally shipped in carload... | |
 | United States. Bureau of Mines - 1912 - 1246 Seiten
...a square ranges from 7 by 9 inches to 16 by 24 inches, and the number of pieces in a square ranges from 85 to 686, according to the size of the pieces. The ordinary thickness of a piece is from ontf-eighth to three-sixteenths of an inch, and the approximate weight per square is about 650 pounds.... | |
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... a square being a sufficient number of pieces of slate of any size to cover 100 square feet of roof, with allowance generally for a 3-inch lap. The size of the pieces of slate making up a square ranges from 7 by 9 inches to 16 by 24 inches, and the... 