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.
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 |
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. | ||||||||||||||||||
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″ |