RELATIVE ACTIVITY OF BUILDING BRICKS
ounTs/second Wil. tuck wnt. ALT Selb(1)
7
»
Atlanta, Georgia
Surface Clay
Canton, Ohio
Fire Clay
Shale
n
ABSORPTION yl ABSORPTION
--
Salisbury, North Carolina
n
nie “MEDIUM
TYPE
LOCATION
LOW
ABSORPTION
62
65
68
68
72
72
82
83
98
104
94
87
125,
Shale
illinois
76
78
77
76
80
79
72, 73, 74, 74, 75, 78
Illinois
Fire Clay
9}
97
103
Fairbury, Nebraska
Fire Clay
69
68
67
67
Denver, Colorado
Shale andSurface Clay
Surface Clay
Surface Clay
86
60
100
96
134
n
"
tt
th
96
Ht
ft
n
Fire Clay
135*
1ay*
165
165
n
n
Fire Clay
236
236
2i4
2i4
n
fr
Wichita,
125, 128, 128
86, 86, 89, 89, 92, 92
Chicago, I!linois
Danville,
48, 48, 49, 49, 51, 59
89, 99
Columbus, Ohio
Streator,
UNCLASSIFIED
itg
68
68
76
93
96
388*
191
96
370*
184
71, 82, 82, 137, 140, 166
Surface Clay
Kansas
119
Austin, Texas
59, 59, 60, 63, 65, 65, 93, 97, 97,
99, 104, 107
San Francisco, California
39, 46, 48, 52, 53, 55, 56, 65, 7I,
New York, New York
68,
80,
BACKGROUND:
NOTE:
84
(**)
70, 7i, 72
APPROXIMATELY 12 C/SEc.
* These bricks are 1 to 3 pounds heavier than the average brick which weighs about 5 pounds.
** These bricks averaged about 6 pounds in weight,