11. 20 Gauge Floor Support Requirements
20 Gauge Grandstand Chart - 2.66" Corrugation
Narrow/2.66" Corrugation - 20 Gauge Grandstand Floor Support Chart
Full Floor Supports Required for Plank Type Flooring 2.66" Corrugation
(* Based upon 13.5" or taller floor heights)
Dia. | 12 | 15 | 18 |
| 21 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 | 54 | 60 | 72 | 75 | 78 | 90 | 105 |
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3 | 57/27 |
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| All floor styles OK for |
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62 |
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| bin sizes in upper |
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| Floor styles list in order of |
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| SUPPORT SPACING |
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| 54/27 | 58/29 | 54/27 |
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| shaded area. |
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| increasing strength |
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4 | 62 | 80 | 120 |
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| SUPPORT QUANTITY |
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| 20 Gauge |
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| 18 Gauge |
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5 | 54/27 | 58/29 | 54/27 | 52/26 | 56/28 | 54/27 | 54/27 | 50/25 | 50/25 | 50/25 |
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62 | 80 | 120 |
| 160 | 205 | 249 | 304 | 390 | 470 | 576 |
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6 | 54/27 | 54/27 | 54/27 | 52/26 | 52/26 | 48/24 | 50/25 | 50/25 | 48/24 | 48/24 | 46/23 | 46/23 | 46/23 | 44/22 | 44/22 |
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62 | 88 | 120 |
| 160 | 215 | 275 | 333 | 390 | 487 | 586 | 695 | 806 | 909 | 1196 | 1430 |
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7 | 54/27 | 52/26 | 48/24 | 50/25 | 48/24 | 48/24 | 48/24 | 46/23 | 44/22 | 46/23 | 44/22 | 44/22 | 44/22 | 42/21 | 42/21 |
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62 | 96 | 138 |
| 168 | 225 | 275 | 347 | 425 | 523 | 606 | 735 | 836 | 933 | 1236 | 1477 |
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8 | 48/24 | 48/24 | 48/24 | 46/23 | 46/23 | 46/23 | 44/22 | 44/22 | 44/22 | 44/22 | 42/21 | 42/21 | 42/21 | 40/20 | 40/20 |
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70 | 100 | 144 |
| 182 | 230 | 300 | 363 | 435 | 523 | 624 | 750 | 866 | 977 | 1296 | 1544 |
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9 | 48/24 | 48/24 | 42/21 | 42/21 | 42/21 | 44/22 | 42/21 | 42/21 | 40/20 | 42/21 | 40/20 | 40/20 | 40/20 | 38/19 | 36/18 |
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70 | 100 | 144 |
| 190 | 243 | 303 | 387 | 465 | 565 | 656 | 790 | 906 | 1019 | 1346 | 1697 |
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| 18 Gauge |
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10 | 42/21 | 42/21 | 42/21 | 42/21 | 42/21 | 42/21 | 40/20 | 40/20 | 38/19 | 38/19 | 38/19 | 36/18 | 36/18 | 34/17 | 34/17 |
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75 | 110 | 144 |
| 190 | 250 | 309 | 397 | 479 | 597 | 716 | 820 | 986 | 1109 | 1486 | 1779 |
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| middle unshaded area. |
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11 | 42/21 | 42/21 | 42/21 | 42/21 | 40/20 | 40/20 | 38/19 | 36/18 | 36/18 | 36/18 | 34/17 | 34/17 | 34/17 | 32/16 | 32/16 |
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75 | 110 | 144 |
| 190 | 265 | 319 | 417 | 525 | 620 | 746 | 900 | 1036 | 1163 | 1566 | 1883 |
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12 | 38/19 | 40/20 | 40/20 | 40/20 | 38/19 | 38/19 | 36/18 | 34/17 | 34/17 | 34/17 | 32/16 | 32/16 | 32/16 | 30/15 | 30/15 |
| 26/13 | 26/13 | 26/13 | 24/12 | 22/11 |
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80 | 115 | 154 |
| 202 | 280 | 345 | 441 | 550 | 659 | 786 | 950 | 1096 | 1230 | 1660 | 1993 | 3300 | 3580 | 3870 | 5520 | 8110 |
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13 | 38/19 | 38/19 | 38/19 | 36/18 | 36/18 | 36/18 | 34/17 | 32/16 | 32/16 | 30/15 | 30/15 | 30/15 | 28/14 | 1660 | 26/13 | 24/12 | 24/12 | 24/12 | 22/11 | 20/10 |
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80 | 120 | 166 |
| 220 | 290 | 360 | 470 | 600 | 710 | 880 | 1010 | 1160 | 1390 | 1760 | 2300 | 3540 | 3840 | 4150 | 5960 | 8820 |
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14 | 34/17 | 34/17 | 34/17 | 34/17 | 34/17 | 34/17 | 32/16 | 30/15 | 30/15 | 28/14 | 28/14 | 26/13 | 26/13 | 26/13 | 24/12 | 22/11 | 22/11 | 22/11 | 20/10 | 18/9 |
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90 | 130 | 180 |
| 230 | 300 | 380 | 500 | 630 | 750 | 930 | 1070 | 1310 | 1480 | 1870 | 2460 | 3820 | 4150 | 4480 | 6480 | 9680 |
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15 | 32/16 | 32/16 | 32/16 | 32/16 | 32/16 | 32/16 | 30/15 | 28/14 | 28/14 | 26/13 | 26/13 | 24/12 | 24/12 | 24/12 | 22/11 | 22/11 | 20/10 | 20/10 | 18/9 | 18/9 |
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95 | 140 | 190 |
| 250 | 320 | 400 | 520 | 670 | 790 | 990 | 1140 | 1400 | 1590 | 2000 | 2650 | 3820 | 4500 | 4870 | 7120 | 9680 |
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16 | 30/15 | 30/15 | 30/15 | 30/15 | 28/14 | 28/14 | 28/14 | 28/14 | 26/13 | 24/12 | 24/12 | 24/12 | 22/11 | 22/11 | 20/10 |
| 20/10 | 20/10 | 18/9 | 18/9 | 16/8 |
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100 | 150 | 205 |
| 260 | 360 | 450 | 550 | 670 | 840 | 1060 | 1220 | 1400 | 1710 | 2160 | 2880 |
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17 | 28/14 | 28/14 | 28/14 | 26/13 | 26/13 | 26/13 | 26/13 | 26/13 | 24/12 | 24/12 | 22/11 | 22/11 | 20/10 | 20/10 | 20/10 |
| 18/9 | 18/9 | 18/9 | 16/8 | 16/8 |
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106 | 160 | 215 |
| 290 | 380 | 480 | 590 | 710 | 900 | 1060 | 1320 | 1510 | 1860 | 2350 | 2880 | 4550 | 4950 | 5340 | 7910 | 10760 | ||||||||||
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18 | 26/13 | 26/13 | 24/12 | 24/12 | 24/12 | 24/12 | 24/12 | 24/12 | 24/12 | 22/11 | 22/11 | 20/10 | 20/10 | 18/9 | 18/9 | 16/8 | 16/8 | 16/8 | 16/8 | 14/7 |
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110 | 170 | 240 |
| 310 | 400 | 510 | 630 | 760 | 900 | 1140 | 1320 | 1640 | 1860 | 2570 | 3170 | 5060 | 5500 | 5940 | 7910 | 12150 | ||||||||||
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| 24/12 | 24/12 | 22/11 | 22/11 | 22/11 | 22/11 | 22/11 | 22/11 | 22/11 | 20/10 | 20/10 | 18/9 | 18/9 | 16/8 | 16/8 | 16/8 | 16/8 | 14/7 | 14/7 |
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| 180 | 240 |
| 340 | 440 | 550 | 680 | 820 | 970 | 1140 | 1430 | 1640 | 2040 | 2570 | 3520 | 5060 | 5500 | 5940 | 8920 | 12150 | |||||||||
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20 |
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| 22/11 | 22/11 | 22/11 | 22/11 | 22/11 | 20/10 | 20/10 | 20/10 | 20/10 | 20/10 | 18/9 | 18/9 | 16/8 | 16/8 | 14/7 | 14/7 | 14/7 | 14/7 | 12/6 |
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| 190 | 260 |
| 340 | 440 | 550 | 740 | 890 | 1060 | 1240 | 1430 | 1800 | 2040 | 2860 | 3520 | 5710 | 6200 | 6710 | 8920 | 13990 | |||||||||
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21 |
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| 20/10 | 20/10 | 20/10 | 20/10 | 20/10 | 20/10 | 20/10 | 18/9 | 18/9 | 16/8 | 16/8 | 14/7 | 14/7 | 14/7 | 14/7 | 12/6 | 12/6 |
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| 370 | 470 | 600 | 740 | 890 | 1060 | 1240 | 1570 | 1800 | 2270 | 2860 | 3970 | 5710 | 6200 | 6710 | 10280 | 13990 | |||||||||
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22 |
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| 18/9 | 18/9 | 18/9 | 18/9 | 18/9 | 18/9 | 18/9 | 18/9 | 16/8 | 16/8 | 16/8 | 14/7 | 12/6 | 12/6 | 12/6 | 12/6 |
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| 400 | 520 | 660 | 810 | 970 | 1160 | 1360 | 1570 | 2000 | 2270 | 2860 | 3970 | 6580 | 7140 | 7730 | 10280 |
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23 |
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| 18/9 | 18/9 | 16/8 | 16/8 | 16/8 | 16/8 | 16/8 | 16/8 | 16/8 | 16/8 | 14/7 | 14/7 | 12/6 | 12/6 | 12/6 |
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| 400 | 520 | 730 | 900 | 1080 | 1290 | 1510 | 1740 | 2000 | 2270 | 3230 | 3970 | 6580 | 7140 | 7730 |
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| 16/8 | 16/8 | 16/8 | 16/8 | 16/8 | 16/8 | 16/8 | 16/8 | 16/8 | 14/7 | 14/7 | 12/6 | 12/6 | 12/6 |
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24 |
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| 450 | 580 | 730 | 900 | 1080 | 1290 | 1510 | 1740 | 2000 | 2560 | 3230 | 4570 | 6580 | 7140 |
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| 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 12/6 |
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| 500 | 650 | 820 | 1010 | 1220 | 1450 | 1700 | 1960 | 2260 | 2560 | 3230 | 4570 |
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26 |
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| 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 14/7 | 12/6 | 12/6 |
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| 820 | 1010 | 1220 | 1450 | 1700 | 1960 | 2260 | 2560 | 3720 | 4570 |
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| 12/6 | 12/6 | 12/6 | 12/6 | 12/6 | 12/6 | 12/6 | 12/6 | 12/6 | 12/6 |
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| supports are required if Dia. and | ||||||||||||||||||||
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| 950 | 1160 | 1410 | 1670 | 1960 | 2260 | 2600 | 2950 | 3720 | 4570 |
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28 |
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| 12/6 | 12/6 | 12/6 | 12/6 | 12/6 | 12/6 | 12/6 | 12/6 | 12/6 |
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| 950 | 1160 | 1410 | 1670 | 1960 | 2260 | 2600 | 2950 | 3720 |
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29 |
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| 12/6 | 12/6 | 12/6 | 12/6 | 12/6 | SUPPORT SPACING |
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| 950 | 1160 | 1410 | 1670 | 1960 | SUPPORT QUANTITY |
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* For Aeration Systems recessed in the concrete, add one (1) ring for proper spacing.
When using
Quantities of Grandstands are minimum required for installation - Due to varying conditions and construction techniques at floor and wall penetrations, additional supports may need to be ordered.
How to read the chart: For example, a 12' diameter bin with 7 rings would have spacing of 54/27 (the top numbers). Meaning A=54" and B=27". The number of supports needed would be 62, (the bottom number).
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