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 Riveted Grating Load Table |
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| R-18-7 / R-18-3.5 LOAD TABLE | |||||||||||||||||
BEARING BAR SIZE |
UNSUPPORTED SPAN | WEIGHT PER SQ. FT.(LBS.) | |||||||||||||||
| 2'-0" | 2'-6" | 3'-0" | 3'-6" | 4'-0" | 4'-6" | 5'-0" | 5'-6" | 6'-0" | 6'-6" | 7'-0" | 8'-0" | STEEL 18-7 | STEEL 12-7 | ALUM 18-7 | ALUM 12-7 | ||
| 1 X 1/8 | U D C D |
788 .072 788 .058 |
504 .112 631 .090 |
350 .162 526 .130 |
257 .220 450 .176 |
197 .289 394 .230 |
156 .365 350 .292 |
126 .451 315 .360 |
LOADS AND DEFLECTIONS ARE THEORETICAL VALUES BASED ON 18,000 PSI ALUMINUM UNIT STRESS. FOR PEDESTRIAN COMFORT, DEFLECTIONS IN EXCESS OF 1/4" |
7.6 | 10.6 | 2.7 | 3.9 | ||||
| 1 X 3/16 | U D C D |
1184 .072 1184 .058 |
757 .112 947 .090 |
526 .162 788 .130 |
386 .220 676 .176 |
295 .289 592 .230 |
233 .365 526 .292 |
189 .451 473 .360 |
156 .545 430 .436 |
ARE NOT
RECOMMENDED. |
9.4 | 12.8 | 3.3 | 4.5 | |||
| 1-1/4 X 1/8 | U D C D |
1232 .058 1232 .046 |
788 .090 986 .072 |
548 .130 822 .104 |
402 .176 704 .141 |
308 .230 616 .184 |
243 .292 548 .233 |
197 .360 493 .288 |
163 .435 448 .348 |
8.7 | 12.1 | 3.1 | 4.4 | ||||
| 1-1/4 X 3/16 | U D C D |
1851 .058 1851 .046 |
1185 .090 14481 .072 |
823 .130 1235 .104 |
604 .176 1058 .141 |
463 .230 925 .184 |
365 .292 823 .233 |
296 .360 740 .288 |
244 .435 673 .348 |
205 .516 617 .415 |
174 .607 570 .486 |
150 .704 466 .562 |
- | 11.0 | 15.0 | 3.8 | 5.3 |
| 1-1/2 X 1/8 | U D C D |
1775 .048 1775 .038 |
1136 .075 1421 .060 |
788 .108 1184 .086 |
579 .147 1014 .118 |
443 .192 887 .154 |
350 .243 788 .194 |
284 .300 710 .240 |
234 .363 646 .291 |
197 .432 592 .346 |
167 .506 546 .405 |
144 .587 507 .470 |
9.9 | 13.6 | 3.4 | 5.0 | |
| 1-1/2 X 3/16 | U D C D |
2668 .048 2668 .038 |
1707 .075 2134 .060 |
1185 .108 1779 .086 |
871 .147 1524 .118 |
667 .192 1334 .154 |
526 .243 1185 .194 |
426 .300 1067 .240 |
353 .363 970 .291 |
296 .432 888 .346 |
253 .506 821 .405 |
217 .587 762 .470 |
166 .765 667 .614 |
12.5 | 17.1 | 4.4 | 6.1 |
| 1-3/4 X 3/16 | U D C D |
3631 .041 3651 .033 |
2324 .064 2904 .051 |
1614 .093 2420 .074 |
1185 .126 2075 .101 |
908 .165 1815 .132 |
717 .208 1614 .167 |
580 .257 1452 .206 |
480 .312 1320 .249 |
403 .370 1210 .296 |
343 .435 1117 .348 |
296 .505 1037 .403 |
226 .657 908 .527 |
14.2 | 19.4 | 4.9 | 6.8 |
| 2 X 3/16 | U D C D |
4743 .036 4743 .029 |
3036 .056 3795 .045 |
2107 .081 3162 .065 |
1549 .110 2710 .088 |
1185 .144 2371 .115 |
937 .182 2107 .146 |
759 .225 1897 .180 |
626 .272 1725 .218 |
526 .324 1581 .259 |
448 .380 1459 .304 |
387 .441 1354 .353 |
296 .576 1185 .461 |
16.8 | 22.9 | 5.8 | 8.1 |
| 2-1/4 X 3/16 | U D C D |
6004 .032 6004 .026 |
3842 .050 4802 .040 |
2691 .072 4002 .058 |
1959 .098 3430 .078 |
1500 .128 3001 .102 |
1185 .162 2668 .130 |
960 .200 2401 .160 |
793 .242 2182 .194 |
667 .288 2001 .230 |
568 .338 1846 .270 |
489 .392 1715 .314 |
374 .512 1500 .410 |
18.3 | 25.0 | 6.4 | 8.9 |
| 2-1/2 X 3/16 | U D C D |
7411 .029 7411 .023 |
4743 .045 5929 .036 |
3293 .065 4941 .052 |
2419 .088 4235 .070 |
1852 .115 3705 .192 |
1463 .146 3293 .117 |
1185 .180 2964 .144 |
979 .218 2695 .174 |
823 .259 2470 .207 |
701 .304 2280 .243 |
604 .353 2117 .282 |
463 .461 1852 .369 |
19.8 | 27.2 | 6.9 | 9.6 |
| TO DEVELOP THE WEIGHT PER SQ. FT. FOR GRATINGS WITH RIVETS AT 3-1/2" O.C. ADD THE FOLLOWING FACTORS TO THE VALUES ABOVE: | |
FOR STEEL GRATINGS: |
0.4 # PER SQ. FT. |
| FOR ALUMINUM GRATINGS: | 0.2 # PER SQ. FT. |
| CONVERSION TABLE | ||||||||||||||||||||||||||||||||||||||||||||||||
The
loads shown above are for Riveted Steel Gratings type R-18-7 and R-18-3.5. To
determine the load capacities and deflections for alternative bar spacings, multiply the
values given by the following conversion factors:
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