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DEFINITION OF BLUESTONE
New York State Bluestone
is a commercial name for a distinctive variety of
sandstone or wackestone found only in South-Central New
York State and North-Eastern Pennsylvania. The
stone is a strongly indurate (cemented) stone of various
colors, which most typically splits easily into thin
smooth slabs (natural cleft, flagstone). Bluestone
consists primarily of feldspar, quartz, phyllosilicates,
and other accessory minerals held together by a strong
siliceous cement. |
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Harry S. Triebe Sr., Owner
Harry S. Triebe Jr.
Operations Manager
13141 State Highway 30
Downsville, N.Y. 13755
Phone: 607-363-7543
Fax: 607-363-2916 |
   
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NEW YORK STATE BLUESTONE INDUSTRY STANDARDS AND
SPECIFICATIONS |
Natural
Cleft Bluestone
Color:
Full range natural occurring with various
shades of blue, gray, green, buff and lilac with random
surface varying from blue to brown and gold. |
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DIMENSIONAL TOLERANCES |
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Paving Thickness |
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Thickness tolerance varies dependent
on quarry conditions. |
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5/8" Nominal |
+ 1/4" and 1/8" |
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1" Nominal |
+/- 1/4" |
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1-1/2" Nominal |
+ 3/4" and 1/4" |
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2" Nominal |
=/- 1/2" |
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2" Minimum |
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| Face Dimensions |
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Quarry Cut |
Length/Width/Squareness |
+/- 1/4" |
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Shop Cut |
Length/Width/Squareness |
+/- 1/8" |
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| Exposed Edge Dimensions |
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Quarry Cut |
Height |
+/- 1/4" |
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Shop Cut |
Height |
+/- 1/8" |
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| Flatness Tolerance |
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Surface variation not to exceed
=/-1/8" in each square feet of exposed edge. |
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| Bed Joints |
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Allow 1 1/2" bed for setting
Allow 3/4" bed setting for treads, coping and sills
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| Backs of Stones |
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Backs of all pieces may be natural or sawn
Backs of paving may not vary more than 1/2" in 12"
Backs of treads, coping and sills may not be more
than 1/2" in the bed
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