[vc_row][vc_column width=”2/3″][vc_column_text]U = safe uniform load (psf)
C = safe concentrated load (psf)
D = deflection in inches
E = modulus of elasticity, 29,000,000 (psi)
F = fiber stress, 18,000 (psi)
Material: ASTM-A-1011 standard
Deflection: Spans and loads to the right of the bold line exceed 1/4″ deflection for uniform load of 100 psf which provides safe pedestrian comport. These can be exceeded for other types of loads with engineer’s approval.
Serrated Bars: For serrated grating, the depth of grating required for a specified load is 1/4″deeper than that shown in the table.[/vc_column_text][vc_column_text]
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| LOAD & DEFLECTION TABLE: | |||||||||||||||||
| Bar Size | Symbol | # per sf | Sec. Mod per ft. of width | ||||||||||||||
| 2′-0 | 2′-6 | 3′-0 | 3′-6 | 4′-0 | 4′-6 | 5′-0 | |||||||||||
| 3/4″ x 1/8″ Non-Serrated Only | 11W4 | 6.2 | 0.21 | U D |
614 0.099 |
393 0.155 |
273 0.223 |
200 0.304 |
153 0.397 |
121 0.503 |
98 0.621 |
||||||
| 11P4 11P2 |
6.6 7.6 |
C D |
614 0.079 |
491 0.124 |
409 0.179 |
351 0.243 |
307 0.318 |
273 0.402 |
245 0.497 |
||||||||
| 3/4″ x 3/16″ Non-Serrated Only | 11W4 | 9.1 | 0.31 | U D |
920 0.099 |
589 0.155 |
409 0.223 |
301 0.304 |
230 0.397 |
182 0.503 |
147 0.621 |
||||||
| 11P4 11P2 |
9.9 11.3 |
C D |
920 0.079 |
736 0.124 |
614 0.179 |
526 0.243 |
460 0.318 |
409 0.402 |
368 0.497 |
||||||||
| 5′-6 | 6′-0 | 6′-6 | |||||||||||||||
| 1″ x 1/8″ | 11W4 11W2 |
8.1 8.6 |
0.36 | U D |
1091 0.074 |
698 0.116 |
485 0.168 |
356 0.228 |
273 0.298 |
215 0.377 |
175 0.466 |
144 0.563 |
121 0.670 |
||||
| 11P4 11P2 |
8.5 9.4 |
C D |
1091 0.060 |
873 0.093 |
727 0.134 |
623 0.182 |
545 0.238 |
485 0.302 |
436 0.372 |
397 0.451 |
364 0.536 |
||||||
| 1″ x 3/16″ | 11W4 11W2 |
11.9 12.5 |
0.55 | U D |
1636 0.074 |
1047 0.116 |
727 0.168 |
534 0.228 |
409 0.298 |
323 0.377 |
262 0.466 |
216 0.563 |
182 0.670 |
155 0.787 |
|||
| 11P4 11P2 |
12.7 14.2 |
C D |
1636 0.060 |
1309 0.093 |
1091 0.134 |
935 0.182 |
818 0.238 |
727 0.302 |
655 0.372 |
595 0.451 |
545 0.536 |
503 0.629 |
|||||
| 6′-6 | 7′-0 | 8′-0 | 9′-0 | ||||||||||||||
| 1-1/4″ x 1/8″ | 11W4 11W2 |
10.0 10.5 | 0.57 | U D |
1705 0.060 |
1091 0.093 |
758 0.134 |
557 0.182 |
426 0.238 |
337 0.302 |
273 0.372 |
225 0.451 |
189 0.536 |
161 0.629 |
139 0.730 |
||
| 11P4 11P2 |
10.7 12.0 |
C D |
1705 0.048 |
1364 0.074 |
1136 0.107 |
974 0.146 |
852 0.191 |
758 0.241 |
682 0.298 |
620 0.360 |
568 0.429 |
524 0.504 |
487 0.584 |
||||
| 1-1/4″ x 3/16″ | 11W4 11W2 |
14.7 15.3 |
0.85 | U D |
2557 0.060 |
1636 0.093 |
1136 0.134 |
835 0.182 |
639 0.238 |
505 0.302 |
409 0.372 |
338 0.451 |
284 0.536 |
242 0.629 |
209 0.730 |
160 0.953 |
|
| 11P4 11P2 |
16.0 17.9 |
C D |
2557 0.048 |
2545 0.074 |
1705 0.107 |
1461 0.146 |
1278 0.191 |
1136 0.241 |
1023 0.298 |
930 0.360 |
852 0.429 |
787 0.504 |
731 0.584 |
639 0.763 |
|||
| 1-1/2″ x 1/8″ | 11W4 11W2 |
11.9 12.4 | 0.82 | U D |
2455 0.050 |
1571 0.078 |
1091 0.112 |
801 0.152 |
614 0.199 |
485 0.251 |
393 0.310 |
325 0.376 |
273 0.447 |
232 0.524 |
200 0.608 |
153 0.794 |
121 1.006 |
| 11P4 11P2 |
12.6 13.9 |
C D |
2455 0.040 |
1964 0.062 |
1636 0.089 |
1403 0.122 |
1227 0.159 |
1091 0.201 |
982 0.248 |
893 0.300 |
818 0.358 |
755 0.420 |
701 0.487 |
614 0.636 |
545 0.804 |
||
| 1-1/2″ x 3/16″ | 11W4 11W2 |
17.5 18.1 |
1.23 | U D |
3682 0.050 |
2356 0.078 |
1636 0.112 |
1202 0.152 |
920 0.199 |
727 0.251 |
589 0.310 |
487 0.376 |
409 0.447 |
349 0.524 |
301 0.608 |
230 0.794 |
182 1.006 |
| 11P4 11P2 |
18.8 20.7 |
C D |
3682 0.040 |
2945 0.062 |
2455 0.089 |
2104 0.122 |
1841 0.159 |
1636 0.201 |
1473 0.248 |
1339 0.300 |
1227 0.358 |
1133 0.420 |
1052 0.487 |
920 0.636 |
818 0.804 |
||
| 1-3/4″ x 3/16″ | 11W4 11W2 |
20.4 21.0 |
1.67 | U D |
5011 0.043 |
3207 0.067 |
2227 0.096 |
1636 0.130 |
1253 0.170 |
990 0.215 |
802 0.266 |
663 0.322 |
557 0.383 |
474 0.450 |
409 0.521 |
313 0.681 |
247 0.862 |
| 11P4 11P2 |
21.7 23.6 |
C D |
5011 0.034 |
4009 0.053 |
3341 0.077 |
2864 0.104 |
2506 0.136 |
2227 0.172 |
2005 0.213 |
822 0.257 |
1670 0.306 |
1542 0.360 |
1432 0.417 |
1253 0.545 |
1114 0.689 |
||
| 2″ x 3/16″ | 11W4 11W2 |
23.2 23.8 |
2.18 | U D |
6545 0.037 |
4189 0.058 |
2909 0.084 |
2137 0.114 |
1636 0.149 |
1293 0.189 |
1047 0.233 |
866 0.282 |
727 0.335 |
620 0.393 |
534 0.456 |
409 0.596 |
323 0.754 |
| 11P4 11P2 |
24.5 26.4 |
C D |
6545 0.030 |
5236 0.047 |
4364 0.067 |
3740 0.091 |
3273 0.119 |
2909 0.151 |
2618 0.186 |
2380 0.225 |
2182 0.268 |
2014 0.315 |
1870 0.365 |
1636 0.477 |
1455 0.603 |
||
| 2-1/4″ x 3/16″ | 11W4 11W2 |
26.0 26.6 |
2.76 | U D |
8284 0.033 |
5302 0.052 |
3682 0.074 |
2705 0.101 |
2071 0.132 |
1636 0.168 |
1325 0.207 |
1095 0.250 |
920 0.298 |
784 0.350 |
676 0.406 |
518 0.530 |
409 0.670 |
| 11P4 11P2 |
27.3 29.2 |
C D |
8284 0.026 |
6627 0.041 |
5523 0.060 |
4734 0.081 |
4142 0.106 |
3682 0.134 |
3314 0.166 |
3012 0.200 |
2761 0.238 |
2549 0.280 |
2367 0.324 |
2071 0.424 |
1841 0.536 |
||
| 2-1/2″ x 3/16″ | 11W4 11W2 |
28.8 29.4 |
3.41 | U D |
10227 0.030 |
6545 0.047 |
4545 0.067 |
3340 0.091 |
2557 0.119 |
2020 0.151 |
1636 0.186 |
1352 0.225 |
1136 0.268 |
968 0.315 |
835 0.365 |
639 0.477 |
505 0.603 |
| 11P4 11P2 |
30.1 32.0 |
C D |
10227 0.024 |
8182 0.037 |
6818 0.054 |
5844 0.073 |
5114 0.095 |
4545 0.121 |
4091 0.149 |
3719 0.180 |
3409 0.215 |
3147 0.252 |
2922 0.292 |
2557 0.381 |
2273 0.483 |
||
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| 11W4 & 11P4 STANDARD PANEL WIDTH (inches) | ||||||||||||||||||
|
Note: P-Press-Locked cross bars typically extend 1/8″ each side. W-Welded cross rods may extend 1/8″ each side. |
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| No. of Bars | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | |||
| 1/8″ Bar | 13/16″ | 1-1/2″ | 2-3/16″ | 2-7/8″ | 3-9/16″ | 4-1/4″ | 4-15/16″ | 5-5/8″ | 6-5/16″ | 7″ | 7-11/16″ | 8-3/8″ | 9-1/16″ | 9-3/4″ | 10-7/16″ | |||
| 3/16″ Bar | 7/8″ | 1-9/16″ | 2-1/4″ | 2-15/16″ | 3-5/8″ | 4-5/16″ | 5″ | 5-11/16″ | 6-3/8″ | 7-1/16″ | 7-3/4″ | 8-7/16″ | 9-1/8″ | 9-13/16″ | 10-1/2″ | |||
| No. of Bars | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |||
| 1/8″ Bar | 11-1/8″ | 11-13/16″ | 12-1/2″ | 13-3/16″ | 13-7/8″ | 14-9/16″ | 15-1/4″ | 15-5/16″ | 16-5/8″ | 17-5/16″ | 18″ | 18-11/16″ | 19-3/8″ | 20-1/16″ | 20-3/4″ | |||
| 3/16″ Bar | 11-3/16″ | 11-7/8″ | 12-9/16″ | 13-1/4″ | 13-15/16″ | 14-7/8″ | 15-5/16″ | 16″ | 16-11/16″ | 17-3/8″ | 18-1/16″ | 18-3/4″ | 19-7/16″ | 20-1/8″ | 20-13/16″ | |||
| No. of Bars | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | |||
| 1/8″ Bar | 21-7/16″ | 22-1/8″ | 22-13/16″ | 23-1/2″ | 24-3/16″ | 24-7/8″ | 25-9/16″ | 26-1/4″ | 26-15/16″ | 27-5/8″ | 28-5/16″ | 29″ | 29-11/16″ | 30-3/8″ | 31-1/16″ | |||
| 3/16″ Bar | 21-1/2″ | 22-3/16″ | 22-7/8″ | 23-9/16″ | 24-1/4″ | 24-15/16″ | 25-5/8″ | 26-5/16″ | 27″ | 27-11/16″ | 28-3/8″ | 29-1/16″ | 29-3/4″ | 30-7/16″ | 31-1/8″ | |||
| No. of Bars | 47 | 48 | 49 | 50 | 51 | 52 | 53 | |||||||||||
| 1/8″ Bar | 31-3/4″ | 32-7/16″ | 33-1/8″ | 33-13/16″ | 34-1/2″ | 35-3/16″ | 35-7/8″ | |||||||||||
| 3/16″ Bar | 31-13/16″ | 32-1/2″ | 33-3/16″ | 33-7/8″ | 34-9/16″ | 35-1/4″ | 35-15/16″ | |||||||||||
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