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 | 5′-6 | ||||||||||
3/4″ x 1/8″ Non-Serrated Only | 7W4 | 9.3 | 0.32 | U D | 964 0.099 | 617 0.155 | 429 0.223 | 315 0.304 | 241 0.397 | 190 0.503 | 154 0.621 | ||||||
7P4 7P2 | 9.8 10.7 | C D | 964 0.079 | 771 0.124 | 643 0.179 | 551 0.243 | 482 0.318 | 429 0.402 | 386 0.497 | ||||||||
3/4″ x 3/16″ Non-Serrated Only | 7W4 | 13.7 | 0.48 | U D | 1446 0.099 | 926 0.155 | 643 0.223 | 472 0.304 | 362 0.397 | 286 0.503 | 231 0.621 | 191 0.751 | |||||
7P4 7P2 | 14.6 16.1 | C D | 1446 0.079 | 1157 0.124 | 964 0.179 | 827 0.243 | 723 0.318 | 643 0.402 | 579 0.497 | 526 0.601 | |||||||
6′-0 | 6′-6 | 7′-0 | |||||||||||||||
1″ x 1/8″ | 7W4 | 12.3 | 0.57 | U D | 1714 0.074 | 1097 0.116 | 762 0.168 | 560 0.228 | 429 0.298 | 339 0.377 | 274 0.466 | 227 0.563 | 190 0.670 | 162 0.787 | |||
7P4 7P2 | 12.7 13.7 | C D | 1714 0.060 | 1371 0.093 | 1143 0.134 | 980 0.182 | 857 0.238 | 762 0.302 | 686 0.372 | 623 0.451 | 571 0.536 | 527 0.629 | |||||
1″ x 3/16″ | 7W4 | 18.1 | 0.86 | U D | 2571 0.074 | 1646 0.116 | 1143 0.168 | 840 0.228 | 643 0.298 | 508 0.377 | 411 0.466 | 340 0.563 | 286 0.670 | 243 0.787 | 210 0.912 | ||
7P4 7P2 | 19.0 20.5 | C D | 2571 0.060 | 2057 0.093 | 1714 0.134 | 1469 0.182 | 1286 0.238 | 1143 0.302 | 1029 0.372 | 935 0.451 | 857 0.536 | 791 0.629 | 735 0.730 | ||||
8′-0 | 9′-0 | ||||||||||||||||
1-1/4″ x 1/8″ | 7W4 | 15.3 | 0.89 | U D | 2679 0.060 | 1714 0.093 | 1190 0.134 | 875 0.182 | 670 0.238 | 529 0.302 | 429 0.372 | 354 0.451 | 298 0.536 | 254 0.629 | 219 0.730 | 167 0.953 | |
7P4 7P2 | 16.0 17.3 | C D | 2679 0.048 | 2143 0.074 | 1786 0.107 | 1531 0.146 | 1339 0.191 | 1190 0.241 | 1071 0.298 | 974 0.360 | 893 0.429 | 824 0.504 | 765 0.584 | 670 0.763 | |||
1-1/4″ x 3/16″ | 7W4 | 22.5 | 1.34 | U D | 4018 0.060 | 2571 0.093 | 1786 0.134 | 1312 0.182 | 1004 0.238 | 794 0.302 | 643 0.372 | 531 0.451 | 446 0.536 | 380 0.629 | 328 0.730 | 251 0.953 | 198 1.207 |
7P4 7P2 | 23.9 25.8 | C D | 4018 0.048 | 3214 0.074 | 2679 0.107 | 2296 0.146 | 2009 0.191 | 1786 0.241 | 1607 0.298 | 1461 0.360 | 1339 0.429 | 1236 0.504 | 1148 0.584 | 1004 0.763 | 893 0.965 | ||
1-1/2″ x 1/8″ | 7W4 | 18.1 | 1.29 | U D | 3857 0.050 | 2469 0.078 | 1714 0.112 | 1259 0.152 | 964 0.199 | 762 0.251 | 617 0.310 | 510 0.376 | 429 0.447 | 365 0.524 | 315 0.608 | 241 0.794 | 190 1.006 |
7P4 7P2 | 18.9 20.2 | C D | 3857 0.040 | 3086 0.062 | 2571 0.089 | 2204 0.122 | 1929 0.159 | 1714 0.201 | 1543 0.248 | 1403 0.300 | 1286 0.358 | 1187 0.420 | 1102 0.487 | 964 0.636 | 857 0.804 | ||
1-1/2″ x 3/16″ | 7W4 | 26.9 | 1.93 | U D | 5786 0.050 | 3703 0.078 | 2571 0.112 | 1889 0.152 | 1446 0.199 | 1143 0.251 | 926 0.310 | 765 0.376 | 643 0.447 | 548 0.524 | 472 0.608 | 362 0.794 | 286 1.006 |
7P4 7P2 | 28.3 30.2 | C D | 5786 0.040 | 4629 0.062 | 3857 0.089 | 3306 0.122 | 2893 0.159 | 2571 0.201 | 2314 0.248 | 2104 0.300 | 1929 0.358 | 1780 0.420 | 1653 0.487 | 1446 0.636 | 1286 0.804 | ||
1-3/4″ x 3/16″ | 2.63 | U D | 7875 0.043 | 5040 0.067 | 3500 0.096 | 2571 0.130 | 1969 0.170 | 1556 0.215 | 1260 0.266 | 1041 0.322 | 875 0.383 | 746 0.450 | 643 0.521 | 492 0.681 | 389 0.862 | ||
7P4 7P2 | 32.7 34.6 | C D | 7875 0.034 | 6300 0.053 | 5250 0.077 | 4500 0.104 | 3938 0.136 | 3500 0.172 | 3150 0.213 | 2864 0.257 | 2625 0.306 | 2423 0.360 | 2250 0.417 | 1969 0.545 | 1750 0.689 | ||
2″ x 3/16″ | 3.43 | U D | 10286 0.037 | 6583 0.058 | 4571 0.084 | 3359 0.114 | 2571 0.149 | 2032 0.189 | 1646 0.233 | 1360 0.282 | 1143 0.335 | 974 0.393 | 840 0.456 | 643 0.596 | 508 0.754 | ||
7P4 7P2 | 37.1 39.0 | C D | 10286 0.030 | 8229 0.047 | 6857 0.067 | 5878 0.091 | 5143 0.119 | 4571 0.151 | 4114 0.186 | 3740 0.225 | 3429 0.268 | 3165 0.315 | 2939 0.365 | 2571 0.477 | 2286 0.603 | ||
2-1/4″ x 3/16″ | 4.34 | U D | 13018 0.033 | 8331 0.052 | 5786 0.074 | 4251 0.101 | 3254 0.132 | 2571 0.168 | 2083 0.207 | 1721 0.250 | 1446 0.298 | 1232 0.350 | 1063 0.406 | 814 0.530 | 643 0.670 | ||
7P4 7P2 | 41.5 43.4 | C D | 13018 0.026 | 10414 0.041 | 8679 0.060 | 7439 0.081 | 6509 0.106 | 5786 0.134 | 5207 0.166 | 4734 0.200 | 4339 0.238 | 4005 0.280 | 3719 0.324 | 3254 0.424 | 2893 0.536 | ||
2-1/2″ x 3/16″ | 5.36 | U D | 16071 0.030 | 10286 0.047 | 7143 0.067 | 5248 0.091 | 4018 0.119 | 3175 0.151 | 2571 0.186 | 2125 0.225 | 1786 0.268 | 1522 0.315 | 1312 0.365 | 1004 0.477 | 794 0.603 | ||
7P4 7P2 | 45.9 47.8 | C D | 16071 0.024 | 12857 0.037 | 10714 0.054 | 9184 0.073 | 8036 0.095 | 7143 0.121 | 6429 0.149 | 5844 0.180 | 5357 0.215 | 4945 0.252 | 4592 0.292 | 4018 0.381 | 3571 0.483 |
7W4 & 7P4 STANDARD PANEL WIDTH (inches) | ||||||||||||||||||
Panel widths do not include these extensions. | ||||||||||||||||||
No. of Bars | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | |||
1/8″ Bar | 9/16″ | 1″ | 1-7/16″ | 1-7/8″ | 2-5/16″ | 2-3/4″ | 3-3/16″ | 3-5/8″ | 4-1/16″ | 4-1/2″ | 4-15/16″ | 5-3/8″ | 5-13/16″ | 6-1/4″ | 6-11/16″ | |||
3/16″ Bar | 5/8″ | 1-1/16″ | 1-1/2″ | 1-15/16″ | 2-3/8″ | 2-13/16″ | 3-1/4″ | 3-11/16″ | 4-1/8″ | 4-9/16″ | 5″ | 5-7/16″ | 5-7/8″ | 6-5/16″ | 6-3/4″ | |||
No. of Bars | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |||
1/8″ Bar | 7-1/8″ | 7-9/16″ | 8″ | 8-7/16″ | 8-7/8″ | 9-5/16″ | 9-3/4″ | 10-3/16″ | 10-5/8″ | 11-1/16″ | 11-1/2″ | 11-5/16″ | 12-3/8″ | 12-13/16″ | 13-1/4″ | |||
3/16″ Bar | 7-3/16″ | 7-5/8″ | 8-1/16″ | 8-1/2″ | 8-15/16″ | 9-3/8″ | 9-13/16″ | 9-1/4″ | 10-11/16″ | 11-1/8″ | 11-9/16″ | 12″ | 12-7/16″ | 12-7/8″ | 13-5/16″ | |||
No. of Bars | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | |||
1/8″ Bar | 13-11/16″ | 14-1/8″ | 14-9/16″ | 15″ | 15-7/16″ | 15-7/8″ | 16-5/16″ | 16-3/4″ | 17-3/16″ | 17-5/8″ | 18-1/16″ | 18-1/2″ | 18-15/16″ | 19-3/8″ | 19-13/16″ | |||
3/16″ Bar | 13-3/4″ | 14-3/16″ | 14-5/8″ | 15-1/16″ | 15-1/2″ | 15-15/16″ | 16-3/8″ | 16-3/16″ | 17-1/4″ | 17-11/16″ | 18-1/8″ | 18-9/16″ | 19″ | 19-7/16″ | 19-7/8″ | |||
No. of Bars | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | |||
1/8″ Bar | 20-1/4″ | 20-11/16″ | 21-1/8″ | 21-9/16″ | 22″ | 22-7/16″ | 22-7/8″ | 23-5/16″ | 23-3/4″ | 24-3/16″ | 24-5/8″ | 25-1/16″ | 25-1/2″ | 25-15/16″ | 26-1/8″ | |||
3/16″ Bar | 20-5/16″ | 20-3/4″ | 21-13/16″ | 21-5/8″ | 22-1/16″ | 22-1/2″ | 22-15/16″ | 23-3/8″ | 23-13/16″ | 24-1/4″ | 24-11/16″ | 25-1/8″ | 25-9/16″ | 26″ | 26-7/16″ | |||
No. of Bars | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | |||
1/8″ Bar | 26-13/16″ | 27-1/4″ | 27-11/16″ | 28-1/8″ | 28-9/16″ | 29″ | 29-7/16″ | 29-7/8″ | 30-5/16″ | 30-3/4″ | 31-3/16″ | 31-5/8″ | 32-1/16″ | 32-1/2″ | 32-15/16″ | |||
3/16″ Bar | 26-7/8″ | 27-5/16″ | 27-3/4″ | 28-3/16″ | 28-5/8″ | 29-1/16″ | 29-1/2″ | 29-15/16″ | 30-3/8″ | 30-13/16″ | 31-1/4″ | 31-11/16″ | 32-1/8″ | 32-9/16″ | 33″ | |||
No. of Bars | 77 | 78 | 79 | 80 | 81 | 82 | 83 | |||||||||||
1/8″ Bar | 33-3/8″ | 33-13/16″ | 34-1/4″ | 34-11/16″ | 35-1/8″ | 35-9/16″ | 36″ | |||||||||||
3/16″ Bar | 33-7/16″ | 33-7/8″ | 34-5/16″ | 34-3/4″ | 35-3/16″ | 35-5/8″ | 36-1/16″ |