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Kolumn Forms™ |
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Technical Information |
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Click on the desired subject below to access information or link |
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Comparison of Column Areas |
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Holddown Spacing Chart for Voids |
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Rate of Pour |
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How to use Recess Ring Forms |
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Concrete Requirements |
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Product Guide Specifications |
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COMPARISON OF COLUMN AREAS |
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| The carrying capacity of a column is primarily based on the gross area of the cross sectional (assuming the same amount of steel is used). |
| Use the table below to determine what size round column to substitute for a square column. |
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SQUARE COLUMN SIZE (INCHES) |
GROSS AREA (SQUARE IN.) |
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ROUND COLUMN DIAMETER (INCHES) |
GROSS AREA (SQUARE IN.) |
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8 X 8 |
64 |
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10 |
79 |
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10 X 10 |
100 |
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12 |
113 |
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12 X 12 |
144 |
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14 |
154 |
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14 X 14 |
196 |
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16 |
201 |
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16 X 16 |
256 |
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18 |
254 |
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18 X 18 |
324 |
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20 |
314 |
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20 X 20 |
400 |
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22 |
380 |
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22 X 22 |
484 |
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24 |
452 |
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24 X 24 |
576 |
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26 |
531 |
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26 X 26 |
676 |
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28 |
616 |
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28 X 28 |
784 |
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30 |
707 |
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30 X 30 |
900 |
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32 |
804 |
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32 X 32 |
1024 |
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34 |
908 |
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34 X 34 |
1156 |
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36 |
1018 |
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36 X 36 |
1296 |
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42 |
1385 |
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42 X 42 |
1764 |
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48 |
1810 |
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48 X 48 |
2304 |
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60 |
2827 |
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CONCRETE REQUIREMENTS |
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COLUMN DIAMETER (INCHES) |
CUBIC VOL CONCRETE PER FT OF HEIGHT |
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COLUMN DIAMETER (INCHES) |
CUBIC VOL CONCRETE PER FT OF HEIGHT |
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6" |
.0073 |
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24" |
.1164 |
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8" |
.0129 |
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28" |
.1584 |
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10" |
.0202 |
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30" |
.1818 |
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12" |
.0291 |
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32" |
.0269 |
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14" |
.0396 |
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36" |
.2618 |
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16" |
.0517 |
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42" |
.3565 |
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18" |
.0654 |
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48" |
.4654 |
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20" |
.0808 |
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60" |
.7275 |
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