Steel Bar Grating

Welded Steel Bar Grating is the most popular of The bearing bars are automatically resistance Further fabrication or galvanizing is not recom-
all grating types due to its strength, cost-efficient welded at the contact point with the cross bars mended after the material leaves AMICO®.
production and ease of installation. Universally and, under a combination of high heat and pres-
Steel Welded Railroad Grating, in 1-9/16” and
used in most general industrial plants as well as sure, are fused together to form a permanent
1-11/16” spacings, is AAR (Association of Ameri-
commercial buildings, it has wide applications joint. The cross bars provide a high degree of
can Railroads) approved and specified for brake
as walkways, platforms, safety barriers, drainage rigidity, yet retain a smooth flat surface for free
steps, running boards, walkways and platforms
covers and ventilation grates. and easy walking.
for railroad cars. Designed and engineered
It is also ideal for use as mezzanine decking since Press-Locked Steel Bar Grating is often desirable specifically for railroad use, AMICO railroad
it supports the same loads as comparable solid because of its clean, smooth look and excellent grating is used by both new car and car repair
flooring. More than that, its cost saving openness lateral support. It exhibits the same strength, long facilities since it is interchangeable with other
maximizes the circulation of air, light, heat, water life and openness as welded grating, although AAR approved gratings. The serrated bearing bars
and sound, while promoting cleanliness. And, it is not r­ ecommended for rolling loads. Instead provide additional safety and the openness of bar
where insurance codes permit, additional sprin- of welding the joints, however, tremendous grating minimizes build up of snow, ice and other
klers can often be eliminated. Standard panels are hydraulic pressure is used to bond the two debris.
available in widths of 2’, 3’ or 4’. close-tolerance slotted bars together. Permanent
locking is achieved by forcing the deep cross bar
Welded steel bar grating is resistance welded to
into the notched bearing bar.
create a rugged, one-piece constructed panel.

Welded Steel Bar Grating Steel Welded Railroad Grating (AAR Approved) Press-Locked Steel Bar Grating

19-w-4 19-w-2 19-P-4 19-P-2

25-W-4 27-w-4

15-w-4 15-w-2 15-P-4 15-P-2

13-w-4 13-w-2 13-P-4 13-P-2

11-w-4 11-w-2 11-P-4 11-P-2

10-w-4 10-w-2 10-P-4 10-P-2

7
/16”

8-w-4 7-W-4 8-P-4 8-P-2

Std. Panel width 2’-0 & 3’-0

4’-0 wide on some styles of
welded and press-locked
(upon request) 7-P-4 7-P-2

Meets NAAMM’s Metal Bar Grating Manual MBG 531

2
Steel Bar Grating

welded (W) 1-3/16” C/C Bearing Bars press-locked (P) 1-3/16” C/C Bearing Bars
19-W-4 19-W-2 19-P-4 19-P-2

Cross Rods 4” C/C Cross Rods 2” C/C Cross Bars 4” C/C Cross Bars 2” C/C
NON-SERRATED & SERRATED NON-SERRATED & SERRATED

U = safe uniform load, psf

LOAD & DEFLECTION TABLE C = safe concentrated load, psf
General: Loads and deflections are theoretical and based on static loading. D = deflection, inches
E = modulus of elasticity, 29,000,000 psi
F = fiber stress, 18,000 psi

Bar Approx. Sec. Mod SPAN (Direction of Bearing Bar)
Symbol Weight Per Ft. Material: ASTM A-1011 standard
Size psf Of Width 24” 30” 36” 42” 48” 54” Deflection: Spans and loads to the right of the
19-W-4 3.9 U 355 227 158 116 89 70 bold line exceed 1/4” deflection for uniform
3/4” x 1/8” D 0.099 0.155 0.223 0.304 0.397 0.503 load of 100 psf which provides safe pedes-
Non-Serrated Only 19-P-4 4.3 0.118 C 355 284 237 203 178 158 trian comfort. These can be exceeded for
19-P-2 5.2 D 0.079 0.124 0.179 0.243 0.318 0.402 other types of loads with engineer’s approval.
19-W-4 5.6 U 533 341 237 174 133 105 Serrated Bars: For serrated grating, the
3/4” x 3/16” D 0.099 0.155 0.223 0.304 0.397 0.503 depth of grating required for a specified
Non-Serrated Only 19-P-4 6.4 0.178 C 533 426 355 305 266 237
60” 66” load is 1/4” deeper than that shown in
19-P-2 7.8 D 0.079 0.124 0.179 0.243 0.318 0.402 the table.
19-W-4 5.0 U 632 404 281 206 158 125 101 84
19-W-2 5.5 D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563
1” x 1/8” 19-P-4 5.4 0.211 C 632 505 421 361 316 281 253 230
19-P-2 6.3 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451
19-W-4 7.2 U 947 606 421 309 237 187 152 125
19-W-2 7.8 D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563
1” x 3/16” 19-P-4 8.1 0.316 C 947 758 632 541 474 421 379 344
19-P-2 9.5 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 72” 78” 84”
19-W-4 6.1 U 987 632 439 322 247 195 158 130 110 93 81
19-W-2 6.6 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730
1-1/4” x 1/8” 19-P-4 6.8 0.329 C 987 789 658 564 493 439 395 359 329 304 282
19-P-2 8.1 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584
19-W-4 8.9 U 1480 947 658 483 370 292 237 196 164 140 121
19-W-2 9.5 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730
1-1/4” x 3/16” 19-P-4 10.2 0.493 C 1480 1184 987 846 740 658 592 538 493 455 423
19-P-2 12.1 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 96” 108”
19-W-4 7.2 U 1421 909 632 464 355 281 227 188 158 135 116 89 70
19-W-2 7.7 D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 1/8” 19-P-4 7.9 0.474 C 1421 1137 947 812 711 632 568 517 474 437 406 355 316
19-P-2 9.2 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
19-W-4 10.5 U 2132 1364 947 696 533 421 341 282 237 202 174 133 105
19-W-2 11.2 D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 3/16” 19-P-4 11.8 0.711 C 2132 1705 1421 1218 1066 947 853 775 711 656 609 533 474
19-P-2 13.8 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
19-W-4 12.2 U 2901 1857 1289 947 725 573 464 384 322 275 237 181 143
19-W-2 12.8 D 0.043 0.067 0.096 0.130 0.170 0.215 0.266 0.322 0.383 0.450 0.521 0.681 0.862
1-3/4” x 3/16” 19-P-4 13.5 0.967 C 2901 2321 1934 1658 1451 1289 1161 1055 967 893 829 725 645
19-P-2 15.4 D 0.034 0.053 0.077 0.104 0.136 0.172 0.213 0.257 0.306 0.360 0.417 0.545 0.689
19-W-4 13.9 U 3789 2425 1684 1237 947 749 606 501 421 359 309 237 187
19-W-2 14.5 D 0.037 0.058 0.084 0.114 0.149 0.189 0.233 0.282 0.335 0.393 0.456 0.596 0.754
2” x 3/16” 19-P-4 15.2 1.263 C 3789 3032 2526 2165 1895 1684 1516 1378 1263 1166 1083 947 842
19-P-2 17.1 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
19-W-4 15.5 U 4796 3069 2132 1566 1199 947 767 634 533 454 392 300 237
19-W-2 16.1 D 0.033 0.052 0.074 0.101 0.132 0.168 0.207 0.250 0.298 0.350 0.406 0.530 0.670
2-1/4” x 3/16” 19-P-4 16.8 1.599 C 4796 3837 3197 2741 2398 2132 1918 1744 1599 1476 1370 1199 1066
19-P-2 18.7 D 0.026 0.041 0.060 0.081 0.106 0.134 0.166 0.200 0.238 0.280 0.324 0.424 0.536
19-W-4 17.2 U 5921 3789 2632 1933 1480 1170 947 783 658 561 483 370 292
19-W-2 17.8 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
2-1/2” x 3/16” 19-P-4 18.5 1.974 C 5921 4737 3947 3383 2961 2632 2368 2153 1974 1822 1692 1480 1316
19-P-2 20.4 D 0.024 0.037 0.054 0.073 0.095 0.121 0.149 0.180 0.215 0.252 0.292 0.381 0.483

W/P-19 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. 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 15/16 21/2 311/16 47/8 61/16 71/4 87/16 95/8 1013/16 12 133/16 143/8 159/16 163/4 1715/16
3/16” Bar 13/8 29/16 33/4 415/16 61/8 75/16 81/2 911/16 107/8 121/16 131/4 147/16 155/8 1613/16 18
No. of Bars 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
1/8” Bar 191/8 205/16 211/2 2211/16 237/8 251/16 261/4 277/16 285/8 2913/16 31 323/16 333/8 349/16 353/4
3/16” Bar 193/16 203/8 219/16 223/4 2315/16 251/8 265/16 271/2 2811/16 297/8 311/16 321/4 337/16 345/8 3513/16
3
 Steel Bar Grating

welded (W) 15/16” C/C Bearing Bars press-locked (P) 15/16” C/C Bearing Bars
15-W-4 15-W-2 15-P-4 15-P-2

Cross Rods 4” C/C Cross Rods 2” C/C Cross Bars 4” C/C Cross Bars 2” C/C
NON-SERRATED & SERRATED NON-SERRATED & SERRATED

LOAD & DEFLECTION TABLE U = safe uniform load, psf

C = safe concentrated load, psf
General: Loads and deflections are theoretical and based on static loading.
D = deflection, inches
E = modulus of elasticity, 29,000,000 psi

Bar Approx. Sec. Mod SPAN (Direction of Bearing Bar)
Symbol Weight Per Ft. F = fiber stress, 18,000 psi
Size psf Of Width 24” 30” 36” 42” 48” 54” Material: ASTM A-1011
15-W-4 4.7 U 450 288 200 147 113 89 Deflection: Spans and loads to the right of the
3/4” x 1/8” D 0.099 0.155 0.223 0.304 0.397 0.503 bold line exceed 1/4” deflection for uniform
15-P-4 5.1 0.150 C 450 360 300 257 225 200
Non-Serrated Only load of 100 psf which provides safe pedestrian
15-P2 6.1 D 0.079 0.124 0.179 0.243 0.318 0.402 60” comfort. These can be exceeded for other types
15-W-4 6.9 U 675 432 300 220 169 133 108 of loads with engineer’s approval.
3/4” x 3/16” D 0.099 0.155 0.223 0.304 0.397 0.503 0.621
Serrated Bars: For serrated
15-P-4 7.7 0.225 C 675 540 450 386 338 300 270
Non-Serrated Only grating, the depth of grat-
15-P-2 9.1 D 0.079 0.124 0.179 0.243 0.318 0.402 0.497 66” 72”
15-W-4 6.1 U 800 512 356 261 200 158 128 106 89 ing required for a specified
15-W-2 6.7 D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670 load is 1/4” deeper than that
1” x 1/8” 15-P-4 6.5 0.267 C 800 640 533 457 400 356 320 291 267 shown in the table.
15-P-2 7.5 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536
15-W-4 8.9 U 1200 768 533 392 300 237 192 159 133
15-W-2 9.6 D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670
1” x 3/16” 15-P-4 9.8 0.400 C 1200 960 800 686 600 533 480 436 400
15-P-2 11.2 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 78” 84”
15-W-4 7.5 U 1250 800 556 408 313 247 200 165 139 118 102
15-W-2 8.1 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730
1-1/4” x 1/8” 15-P-4 8.2 0.417 C 1250 1000 833 714 625 556 500 455 417 385 357
15-P-2 9.5 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584
15-W-4 11.0 U 1875 1200 833 612 469 370 300 248 208 178 153
15-W-2 11.6 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730
1-1/4” x 3/16” 15-P-4 12.3 0.625 C 1875 1500 1250 1071 938 833 750 682 625 577 536
15-P-2 14.2 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 96” 108”
15-W-4 8.9 U 1800 1152 800 588 450 356 288 238 200 170 147 113 89
15-W-2 9.4 D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 1/8” 15-P-4 9.6 0.600 C 1800 1440 1200 1029 900 800 720 655 600 554 514 450 400
15-P-2 10.9 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
15-W-4 13.1 U 2700 1728 1200 882 675 533 432 357 300 256 220 169 133
15-W-2 13.7 D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 3/16” 15-P-4 14.4 0.900 C 2700 2160 1800 1543 1350 1200 1080 982 900 831 771 675 600
15-P-2 16.3 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
15-W-4 15.2 U 3675 2352 1633 1200 919 726 588 486 408 348 300 230 181
15-W-2 15.8 D 0.043 0.067 0.096 0.130 0.170 0.215 0.266 0.322 0.383 0.450 0.521 0.681 0.862
1-3/4” x 3/16” 15-P-4 16.5 1.225 C 3675 2940 2450 2100 1838 1633 1470 1336 1225 1131 1050 919 817
15-P-2 18.4 D 0.034 0.053 0.077 0.104 0.136 0.172 0.213 0.257 0.306 0.360 0.417 0.545 0.689
15-W-4 17.3 U 4800 3072 2133 1567 1200 948 768 635 533 454 392 300 237
15-W-2 17.9 D 0.037 0.058 0.084 0.114 0.149 0.189 0.233 0.282 0.335 0.393 0.456 0.596 0.754
2” x 3/16” 15-P-4 18.6 1.600 C 4800 3840 3200 2743 2400 2133 1920 1745 1600 1477 1371 1200 1067
15-P-2 20.5 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
15-W-4 19.4 U 6075 3888 2700 1984 1519 1200 972 803 675 575 496 380 300
15-W-2 20.0 D 0.033 0.052 0.074 0.101 0.132 0.168 0.207 0.250 0.298 0.350 0.406 0.530 0.670
2-1/4” x 3/16” 15-P-4 20.7 2.025 C 6075 4860 4050 3471 3038 2700 2430 2209 2025 1869 1736 1519 1350
15-P-2 22.6 D 0.026 0.041 0.060 0.081 0.106 0.134 0.166 0.200 0.238 0.280 0.324 0.424 0.536
15-W-4 21.4 U 7500 4800 3333 2449 1875 1481 1200 992 833 710 612 469 370
15-W-2 22.0 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
2-1/2” x 3/16” 15-P-4 22.7 2.500 C 7500 6000 5000 4286 3750 3333 3000 2727 2500 2308 2143 1875 1667
15-P-2 24.7 D 0.024 0.037 0.054 0.073 0.095 0.121 0.149 0.180 0.215 0.252 0.292 0.381 0.483

W/P-15 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. 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 17 18 19 20
1/8” Bar 11/16 2 215/16 37/8 413/16 53/4 611/16 75/8 89/16 91/2 107/16 113/8 125/16 131/4 143/16 151/8 161/16 17 1715/16
3/16” Bar 11/8 21/16 3 315/16 47/8 513/16 63/4 711/16 85/8 99/16 101/2 117/16 123/8 135/16 141/4 153/16 161/8 171/16 18
No. of Bars 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
1/8” Bar 187/8 1913/16 203/4 2111/16 225/8 239/16 241/2 257/16 263/8 275/16 281/4 293/16 301/8 311/16 32 3215/16 337/8 3413/16 353/4
3/16” Bar 1815/16 197/8 2013/16 213/4 2211/16 235/8 249/16 251/2 267/16 273/8 285/16 291/4 303/16 311/8 321/16 33 3315/16 347/8 3513/16

4
Steel Bar Grating Close-Mesh

welded (W) 13/16” C/C Bearing Bars press-locked (P) 13/16” C/C Bearing Bars
13-W-4 13-W-2 13-P-4 13-P-2

Cross Rods 4” C/C Cross Rods 2” C/C Cross Bars 4” C/C Cross Bars 2” C/C
NON-SERRATED & SERRATED NON-SERRATED & SERRATED

U = safe uniform load, psf

LOAD & DEFLECTION TABLE C = safe concentrated load, psf
General: Loads and deflections are theoretical and based on static loading. D = deflection, inches
E = modulus of elasticity, 29,000,000 psi

Bar Approx. Sec. Mod SPAN (Direction of Bearing Bar) F = fiber stress, 18,000 psi
Symbol Weight Per Ft.
Size psf Of Width 24” 30” 36” 42” 48” 54” Material: ASTM A-1011
13-W-4 5.3 U 519 332 231 170 130 103 Deflection: Spans and loads to the right of the
3/4” x 1/8” D 0.099 0.155 0.223 0.304 0.397 0.503 bold line exceed 1/4” deflection for uniform
13-P-4 5.8 0.173 C 519 415 346 297 260 231 load of 100 psf which provides safe pedestrian
Non-Serrated Only
13-P-2 6.7 D 0.079 0.124 0.179 0.243 0.318 0.402 60” comfort. These can be exceeded for other types
13-W-4 7.8 U 779 498 346 254 195 154 125 of loads with engineer’s approval.
3/4” x 3/16” D 0.099 0.155 0.223 0.304 0.397 0.503 0.621 Serrated Bars: For serrated
13-P-4 8.6 0.260 C 779 623 519 445 389 346 312
Non-Serrated Only grating, the depth of grat-
13-P-2 10.1 D 0.079 0.124 0.179 0.243 0.318 0.402 0.497 66” 72”
ing required for a specified
13-W-4 6.5 U 923 591 410 301 231 182 148 122 103 load is 1/4” deeper than that
13-W-2 7.5 D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670
1” x 1/8” 13-P-4 7.4 0.308 C 923 738 615 527 462 410 369 336 308
shown in the table.
13-P-2 8.3 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536
13-W-4 10.2 U 1385 886 615 452 346 274 222 183 154
13-W-2 10.8 D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670
1” x 3/16” 13-P-4 11.0 0.462 C 1385 1108 923 791 692 615 554 503 462
13-P-2 12.4 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 78” 84”
13-W-4 8.5 U 1442 923 641 471 361 285 231 191 160 137 118
13-W-2 9.1 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730
1-1/4” x 1/8” 13-P-4 9.3 0.481 C 1442 1154 962 824 721 641 577 524 481 444 412
13-P-2 10.5 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584
13-W-4 12.6 U 2163 1385 962 706 541 427 346 286 240 205 177
13-W-2 13.2 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730
1-1/4” x 3/16” 13-P-4 13.9 0.721 C 2163 1731 1442 1236 1082 962 865 787 721 666 618
13-P-2 15.8 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 96” 108”
13-W-4 10.1 U 2077 1329 923 678 519 410 332 275 231 197 170 130 103
13-W-2 10.7 D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 1/8” 13-P-4 10.9 0.692 C 2077 1662 1385 1187 1038 923 831 755 692 639 593 519 462
13-P-2 12.1 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
13-W-4 15.0 U 3115 1994 1385 1017 779 615 498 412 346 295 254 195 154
13-W-2 15.6 D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 3/16” 13-P-4 16.3 1.038 C 3115 2492 2077 1780 1558 1385 1246 1133 1038 959 890 779 692
13-P-2 18.2 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
13-W-4 17.4 U 4240 2714 1885 1385 1060 838 678 561 471 401 346 265 209
13-W-2 18.0 D 0.043 0.067 0.096 0.130 0.170 0.215 0.266 0.322 0.383 0.450 0.521 0.681 0.862
1-3/4” x 3/16” 13-P-4 18.7 1.413 C 4240 3392 2827 2423 2120 1885 1696 1542 1413 1305 1212 1060 942
13-P-2 20.6 D 0.034 0.053 0.077 0.104 0.136 0.172 0.213 0.257 0.306 0.360 0.417 0.545 0.689
13-W-4 19.8 U 5538 3545 2462 1808 1385 1094 886 732 615 524 452 346 274
13-W-2 20.4 D 0.037 0.058 0.084 0.114 0.149 0.189 0.233 0.282 0.335 0.393 0.456 0.596 0.754
2” x 3/16” 13-P-4 21.1 1.846 C 5538 4431 3692 3165 2769 2462 2215 2014 1846 1704 1582 1385 1231
13-P-2 23.0 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
U 7010 4486 3115 2289 1752 1385 1122 927 779 664 572 438 346
D 0.033 0.052 0.074 0.101 0.132 0.168 0.207 0.250 0.298 0.350 0.406 0.530 0.670
2-1/4” x 3/16” 13-P-4 23.5 2.337 C 7010 5608 4673 4005 3505 3115 2804 2549 2337 2157 2003 1752 1558
13-P-2 25.4 D 0.026 0.041 0.060 0.081 0.106 0.134 0.166 0.200 0.238 0.280 0.324 0.424 0.536
U 8654 5538 3846 2826 2163 1709 1385 1144 962 819 706 541 427
D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
2-1/2” x 3/16” 13-P-4 25.9 2.885 C 8654 6923 5769 4945 4327 3846 3462 3147 2885 2663 2473 2163 1923
13-P-2 27.8 D 0.024 0.037 0.054 0.073 0.095 0.121 0.149 0.180 0.215 0.252 0.292 0.381 0.483
W/P-13 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. 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 17 18 19 20
1/8” Bar 15
/16 13/4 29/16 33/8 43/16 5 513/16 65/8 77/16 81/4 91/16 97/8 1011/16 111/2 125/16 131/8 1315/16 143/4 159/16
3/16” Bar 1 113/16 25/8 37/16 41/4 51/16 57/8 611/16 71/2 85/16 91/8 915/16 103/4 119/16 123/8 133/16 14 1413/16 155/8
No. of Bars 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
1/8” Bar 163/8 173/16 18 1813/16 195/8 207/16 211/4 221/16 227/8 2311/16 241/2 255/16 261/8 2615/16 273/4 289/16 293/8 303/16 31
3/16” Bar 167/16 171/4 181/16 187/8 1911/16 201/2 215/16 221/8 2215/16 233/4 249/16 253/8 263/16 27 2713/16 285/8 297/16 301/4 311/16
No. of Bars 40 41 42 43 44 45
1/8” Bar 3113/16 325/8 337/16 341/4 351/16 357/8
3/16” Bar 317/8 3211/16 331/2 345/16 351/8 3515/16
5
 Steel Bar Grating Close-Mesh

welded (W) 11/16” C/C Bearing Bars press-locked (P) 11/16” C/C Bearing Bars
11-W-4 11-W-2 11-P-4 11-P-2

Cross Rods 4” C/C Cross Rods 2” C/C Cross Bars 4” C/C Cross Bars 2” C/C

NON-SERRATED & SERRATED NON-SERRATED & SERRATED

U = safe uniform load, psf

LOAD & DEFLECTION TABLE General: Loads and deflections are theoretical and based on static loading. C = safe concentrated load, psf
D = deflection, inches

Bar Approx. Sec. Mod SPAN (Direction of Bearing Bar) E = modulus of elasticity, 29,000,000 psi
Symbol Weight Per Ft.
Size psf Of Width 24” 30” 36” 42” 48” 54” 60” F = fiber stress, 18,000 psi
11-W-4 6.2 U 614 393 273 200 153 121 98 Material: ASTM A-1011
3/4” x 1/8” D 0.099 0.155 0.223 0.304 0.397 0.503 0.621 Deflection: Spans and loads to the right of the
11-P-4 6.6 0.205 C 614 491 409 351 307 273 245
Non-Serrated Only bold line exceed 1/4” deflection for uniform load
11-P-2 7.6 D 0.079 0.124 0.179 0.243 0.318 0.402 0.497 of 100 psf which provides safe pedestrian com-
11-W-4 9.1 U 920 589 409 301 230 182 147 fort. These can be exceeded for other types
3/4” x 3/16” D 0.099 0.155 0.223 0.304 0.397 0.503 0.621 of loads with engineer’s
11-P-4 9.9 0.307 C 920 736 614 526 460 409 368
Non-Serrated Only approval.
11-P-2 11.3 D 0.079 0.124 0.179 0.243 0.318 0.402 0.497 66” 72”
11-W-4 8.1 U 1091 698 485 356 273 215 175 144 121 Serrated Bars: For ser-
11-W-2 8.6 D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670 rated grating, the depth
1” x 1/8” 11-P-4 8.5 0.364 C 1091 873 727 623 545 485 436 397 364 of grating required for
11-P-2 9.4 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 78” a specified load is 1/4”
11-W-4 11.9 U 1636 1047 727 534 409 323 262 216 182 155 deeper than that shown
11-W-2 12.5 D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670 0.787 in the table.
1” x 3/16” 11-P-4 12.7 0.545 C 1636 1309 1091 935 818 727 655 595 545 503
11-P-2 14.2 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 84”
11-W-4 10.0 U 1705 1091 758 557 426 337 273 225 189 161 139
11-W-2 10.5 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730
1-1/4” x 1/8” 11-P-4 10.7 0.568 C 1705 1364 1136 974 852 758 682 620 568 524 487
11-P-2 12.0 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 96”
11-W-4 14.7 U 2557 1636 1136 835 639 505 409 338 284 242 209 160
11-W-2 15.3 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730 0.953
1-1/4” x 3/16” 11-P-4 16.0 0.852 C 2557 2045 1705 1461 1278 1136 1023 930 852 787 731 639
11-P-2 17.9 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 0.763 108”
11-W-4 11.9 U 2455 1571 1091 801 614 485 393 325 273 232 200 153 121
11-W-2 12.4 D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 1/8” 11-P-4 12.6 0.818 C 2455 1964 1636 1403 1227 1091 982 893 818 755 701 614 545
11-P-2 13.9 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
11-W-4 17.5 U 3682 2356 1636 1202 920 727 589 487 409 349 301 230 182
11-W-2 18.1 D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 3/16” 11-P-4 18.8 1.227 C 3682 2945 2455 2104 1841 1636 1473 1339 1227 1133 1052 920 818
11-P-2 20.7 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
11-W-4 20.4 U 5011 3207 2227 1636 1253 990 802 663 557 474 409 313 247
11-W-2 21.0 D 0.043 0.067 0.096 0.130 0.170 0.215 0.266 0.322 0.383 0.450 0.521 0.681 0.862
1-3/4” x 3/16” 11-P-4 21.7 1.670 C 5011 4009 3341 2864 2506 2227 2005 1822 1670 1542 1432 1253 1114
11-P-2 23.6 D 0.034 0.053 0.077 0.104 0.136 0.172 0.213 0.257 0.306 0.360 0.417 0.545 0.689
11-W-4 23.2 U 6545 4189 2909 2137 1636 1293 1047 866 727 620 534 409 323
11-W-2 23.8 D 0.037 0.058 0.084 0.114 0.149 0.189 0.233 0.282 0.335 0.393 0.456 0.596 0.754
2” x 3/16” 11-P-4 24.5 2.182 C 6545 5236 4364 3740 3273 2909 2618 2380 2182 2014 1870 1636 1455
11-P-2 26.4 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
11-W-4 26.0 U 8284 5302 3682 2705 2071 1636 1325 1095 920 784 676 518 409
11-W-2 26.6 D 0.033 0.052 0.074 0.101 0.132 0.168 0.207 0.250 0.298 0.350 0.406 0.530 0.670
2-1/4” x 3/16” 11-P-4 27.3 2.761 C 8284 6627 5523 4734 4142 3682 3314 3012 2761 2549 2367 2071 1841
11-P-2 29.2 D 0.026 0.041 0.060 0.081 0.106 0.134 0.166 0.200 0.238 0.280 0.324 0.424 0.536
11-W-4 28.8 U 10227 6545 4545 3340 2557 2020 1636 1352 1136 968 835 639 505
11-W-2 29.4 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
2-1/2” x 3/16” 11-P-4 30.1 3.409 C 10227 8182 6818 5844 5114 4545 4091 3719 3409 3147 2922 2557 2273
11-P-2 32.0 D 0.024 0.037 0.054 0.073 0.095 0.121 0.149 0.180 0.215 0.252 0.292 0.381 0.483

W/P-11 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. 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 17 18 19 20
1/8” Bar 13
/16 11/2 23/16 27/8 39/16 41/4 415/16 55/8 65/16 7 711/16 83/8 91/16 93/4 107/16 111/8 1113/16 121/2 133/16
3/16” Bar 7
/8 19/16 21/4 215/16 35/8 45/16 5 511/16 63/8 71/16 73/4 87/16 91/8 913/16 101/2 113/16 117/8 129/16 131/4
No. of Bars 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
1/8” Bar 137/8 149/16 151/4 1515/16 165/8 175/16 18 1811/16 193/8 201/16 203/4 217/16 221/8 2213/16 231/2 243/16 247/8 259/16 261/4
3/16” Bar 1315/16 145/8 155/16 16 1611/16 173/8 181/16 183/4 197/16 201/8 2013/16 211/2 223/16 227/8 239/16 241/4 2415/16 255/8 265/16
No. of Bars 40 41 42 43 44 45 46 47 48 49 50 51 52 53
1/8” Bar 2615/16 275/8 285/16 29 2911/16 303/8 311/16 313/4 327/16 331/8 3313/16 341/2 353/16 357/8
3/16” Bar 27 2711/16 283/8 291/16 293/4 307/16 311/8 3113/16 321/2 333/16 337/8 349/16 351/4 3515/16

6
Steel Bar Grating Close-Mesh

welded (w) 5/8” C/C of Bearing Bars press-locked (P) 5/8” C/C of Bearing Bars
10-W-4 10-W-2 10-P-4 10-P-2

Cross Rods 4” C/C Cross Rods 2” C/C Cross Bars 4” C/C Cross Bars 2” C/C

NON-SERRATED & SERRATED NON-SERRATED & SERRATED

U = safe uniform load, psf
LOAD & DEFLECTION TABLE General: Loads and deflections are theoretical and based on static loading. C = safe concentrated load, psf
D = deflection, inches
Approx. Sec. Mod SPAN (Direction of Bearing Bar) E = modulus of elasticity, 29,000,000 psi
Bar Symbol Weight Per Ft. F = fiber stress, 18,000 psi
Size psf Of Width 24” 30” 36” 42” 48” 54” 60”
Material: ASTM A-1011
10-W-4 6.8 U 675 432 300 220 169 133 108
3/4” x 1/8” D 0.099 0.155 0.223 0.304 0.397 0.503 0.621 Deflection: Spans and loads to the right
10-P-4 7.2 0.225 C 675 540 450 386 338 300 270 of the bold line exceed 1/4” deflection
Non-Serrated Only
10-P-2 8.1 D 0.079 0.124 0.179 0.243 0.318 0.402 0.497 66” for uniform load of 100 psf which pro-
10-W-4 9.9 U 1013 648 450 331 253 200 162 134 vides safe pedestrian comfort. These
3/4” x 3/16” D 0.099 0.155 0.223 0.304 0.397 0.503 0.621 0.751 can be exceeded for other types of loads
10-P-4 10.7 0.338 C 1013 810 675 579 506 450 405 368 with engineer’s approval.
Non-Serrated Only
10-P-2 12.2 D 0.079 0.124 0.179 0.243 0.318 0.402 0.497 0.601 72” Serrated Bars: For serrated
10-W-4 8.8 U 1200 768 533 392 300 237 192 159 133 grating, the depth of grating
10-W-2 9.4 D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670 required for a specified load is
1” x 1/8” 10-P-4 9.2 0.400 C 1200 960 800 686 600 533 480 436 400 1/4” deeper than that
10-P-2 10.2 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 78” shown in the table.
10-W-4 13.0 U 1800 1152 800 588 450 356 288 238 200 170
10-W-2 13.6 D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670 0.787
1” x 3/16” 10-P-4 13.8 0.600 C 1800 1440 1200 1029 900 800 720 655 600 554
10-P-2 15.3 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 84”
10-W-4 10.9 U 1875 1200 833 612 469 370 300 248 208 178 153
10-W-2 11.4 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730
1-1/4” x 1/8” 10-P-4 11.6 0.625 C 1875 1500 1250 1071 938 833 750 682 625 577 536
10-P-2 12.9 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 96”
10-W-4 16.1 U 2813 1800 1250 918 703 556 450 372 313 266 230 176
10-W-2 16.7 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730 0.953
1-1/4” x 3/16” 10-P-4 17.4 0.938 C 2813 2250 1875 1607 1406 1250 1125 1023 938 865 804 703
10-P-2 19.3 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 0.763 108”
10-W-4 13.0 U 2700 1728 1200 882 675 533 432 357 300 256 220 169 133
10-W-2 13.5 D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 1/8” 10-P-4 13.7 0.900 C 2700 2160 1800 1543 1350 1200 1080 982 900 831 771 675 600
10-P-2 15.0 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
10-W-4 19.2 U 4050 2592 1800 1322 1013 800 648 536 450 383 331 253 200
10-W-2 19.8 D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 3/16” 10-P-4 20.5 1.350 C 4050 3240 2700 2314 2025 1800 1620 1473 1350 1246 1157 1013 900
10-P-2 22.4 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
10-W-4 22.3 U 5513 3528 2450 1800 1378 1089 882 729 613 522 450 345 272
10-W-2 22.9 D 0.043 0.067 0.096 0.130 0.170 0.215 0.266 0.322 0.383 0.450 0.521 0.681 0.862
1-3/4” x 3/16” 10-P-4 23.6 1.838 C 5513 4410 3675 3150 2756 2450 2205 2005 1838 1696 1575 1378 1225
10-P-2 25.5 D 0.034 0.053 0.077 0.104 0.136 0.172 0.213 0.257 0.306 0.360 0.417 0.545 0.689
10-W-4 25.4 U 7200 4608 3200 2351 1800 1422 1152 952 800 682 588 450 356
10-W-2 26.0 D 0.037 0.058 0.084 0.114 0.149 0.189 0.233 0.282 0.335 0.393 0.456 0.596 0.754
2” x 3/16” 10-P-4 26.7 2.400 C 7200 5760 4800 4114 3600 3200 2880 2618 2400 2215 2057 1800 1600
10-P-2 28.6 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
10-W-4 28.5 U 9113 5832 4050 2976 2278 1800 1458 1205 1013 863 744 570 450
10-W-2 29.1 D 0.033 0.052 0.074 0.101 0.132 0.168 0.207 0.250 0.298 0.350 0.406 0.530 0.670
2-1/4” x 3/16” 10-P-4 29.8 3.038 C 9113 7290 6075 5207 4556 4050 3645 3314 3038 2804 2604 2278 2025
10-P-2 31.7 D 0.026 0.041 0.060 0.081 0.106 0.134 0.166 0.200 0.238 0.280 0.324 0.424 0.536
10-W-4 31.6 U 11250 7200 5000 3673 2813 2222 1800 1488 1250 1065 918 703 556
10-W-2 32.2 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
2-1/2” x 3/16” 10-P-4 32.9 3.750 C 11250 9000 7500 6429 5625 5000 4500 4091 3750 3462 3214 2813 2500
10-P-2 34.8 D 0.024 0.037 0.054 0.073 0.095 0.121 0.149 0.180 0.215 0.252 0.292 0.381 0.483

W/P-10 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. 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 17 18 19 20
1/8” Bar 3
/4 13/8 2 25/8 31/4 37/8 41/2 51/8 53/4 63/8 7 75/8 81/4 87/8 91/2 101/8 103/4 113/8 12
3/16” Bar 13
/16 17/16 21/16 211/16 35/16 315/16 49/16 53/16 513/16 67/16 71/16 711/16 85/16 815/16 99/16 103/16 1013/16 117/16 121/16
No. of Bars 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
1/8” Bar 125/8 131/4 137/8 141/2 151/8 153/4 163/8 17 175/8 181/4 187/8 191/2 201/8 203/4 213/8 22 225/8 231/4 237/8
3/16” Bar 1211/16 135/16 1315/16 149/16 153/16 1513/16 167/16 171/16 1711/16 185/16 1815/16 199/16 203/16 2013/16 217/16 221/16 2211/16 235/16 2315/16
No. of Bars 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
1/8” Bar 241/2 251/8 253/4 263/8 27 275/8 281/4 287/8 291/2 301/8 303/4 313/8 32 325/8 331/4 337/8 341/2 351/8 353/4
3/16” Bar 249/16 253/16 2513/16 267/16 271/16 2711/16 285/16 2815/16 299/16 303/16 3013/16 317/16 321/16 3211/16 335/16 3315/16 349/16 353/16 3513/16
7
 Steel Bar Grating Close-Mesh

welded (W) 1/2” C/C Bearing Bars press-locked (P) 1/2” C/C Bearing Bars
8-W-4 8-P-4 8-P-2

Welded Panels
Max 2’-0 Width
Cross Rods 4” C/C Cross Bars 4” C/C Cross Bars 2” C/C
NON-SERRATED & SERRATED NON-SERRATED & SERRATED

LOAD & DEFLECTION TABLE General: Loads and deflections are theoretical and based on static loading.
U = safe uniform load, psf
C = safe concentrated load, psf
D = deflection, inches

Bar Approx. Sec. Mod SPAN (Direction of Bearing Bar) E = modulus of elasticity, 29,000,000 psi
Symbol Weight Per Ft.
Size psf Of Width 24” 30” 36” 42” 48” 54” 60” F = fiber stress, 18,000 psi
8-W-4 8.3 U 844 540 375 276 211 167 135 Material: ASTM A-1011
3/4” x 1/8” D 0.099 0.155 0.223 0.304 0.397 0.503 0.621 Deflection: Spans and loads to the right
8-P-4 8.7 0.281 C 844 675 563 482 422 375 338
Non-Serrated Only of the bold line exceed 1/4” deflection for
8-P-2 9.6 D 0.079 0.124 0.179 0.243 0.318 0.402 0.497 66” uniform load of 100 psf which provides
8-W-4 10.9 U 1266 810 563 413 316 250 203 167 safe pedestrian comfort. These can be
3/4” x 3/16” D 0.099 0.155 0.223 0.304 0.397 0.503 0.621 0.751 exceeded for other types of loads with
8-P-4 13.0 0.422 C 1266 1013 844 723 633 563 506 460
Non-Serrated Only engineer’s approval.
8-P-2 14.4 D 0.079 0.124 0.179 0.243 0.318 0.402 0.497 0.601 72”
8-W-4 10.9 U 1500 960 667 490 375 296 240 198 167 Serrated Bars: For serrated
D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670 grating, the depth of grating
1” x 1/8” 8-P-4 11.3 0.500 C 1500 1200 1000 857 750 667 600 545 500 required for a
8-P-2 12.2 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 78” specified load is
8-W-4 16.0 U 2250 1440 1000 735 563 444 360 298 250 213 1/4” deeper than that
D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670 0.787 shown in the table.
1” x 3/16” 8-P-4 16.9 0.750 C 2250 1800 1500 1286 1125 1000 900 818 750 692
8-P-2 18.3 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 84”
8-W-4 13.4 U 2344 1500 1042 765 586 463 375 310 260 222 191
D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730
1-1/4” x 1/8” 8-P-4 14.2 0.781 C 2344 1875 1563 1339 1172 1042 938 852 781 721 670
8-P-2 15.4 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 96” 108”
8-W-4 19.9 U 3516 2250 1563 1148 879 694 563 465 391 333 287 220 174
D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730 0.953 1.207
1-1/4” x 3/16” 8-P-4 21.2 1.172 C 3516 2813 2344 2009 1758 1563 1406 1278 1172 1082 1004 879 781
8-P-2 23.1 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 0.763 0.965
8-W-4 16.0 U 3375 2160 1500 1102 844 667 540 446 375 320 276 211 167
D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 1/8” 8-P-4 16.7 1.125 C 3375 2700 2250 1929 1688 1500 1350 1227 1125 1038 964 844 750
8-P-2 18.2 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
8-W-4 23.8 U 5063 3240 2250 1653 1266 1000 810 669 563 479 413 316 250
D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 3/16” 8-P-4 25.1 1.688 C 5063 4050 3375 2893 2531 2250 2025 1841 1688 1558 1446 1266 1125
8-P-2 27.0 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
U 6891 4410 3063 2250 1723 1361 1103 911 766 652 563 431 340
D 0.043 0.067 0.096 0.130 0.170 0.215 0.266 0.322 0.383 0.450 0.521 0.681 0.862
1-3/4” x 3/16” 8-P-4 28.9 2.297 C 6891 5513 4594 3938 3445 3063 2756 2506 2297 2120 1969 1723 1531
8-P-2 30.8 D 0.034 0.053 0.077 0.104 0.136 0.172 0.213 0.257 0.306 0.360 0.417 0.545 0.689
U 9000 5760 4000 2939 2250 1778 1440 1190 1000 852 735 563 444
D 0.037 0.058 0.084 0.114 0.149 0.189 0.233 0.282 0.335 0.393 0.456 0.596 0.754
2” x 3/16” 8-P-4 32.8 3.000 C 9000 7200 6000 5143 4500 4000 3600 3273 3000 2769 2571 2250 2000
8-P-2 34.7 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
U 11391 7290 5063 3719 2848 2250 1823 1506 1266 1078 930 712 563
D 0.033 0.052 0.074 0.101 0.132 0.168 0.207 0.250 0.298 0.350 0.406 0.530 0.670
2-1/4” x 3/16” 8-P-4 36.6 3.797 C 11391 9113 7594 6509 5695 5063 4556 4142 3797 3505 3254 2848 2531
8-P-2 38.5 D 0.026 0.041 0.060 0.081 0.106 0.134 0.166 0.200 0.238 0.280 0.324 0.424 0.536
U 14063 9000 6250 4592 3516 2778 2250 1860 1563 1331 1148 879 694
D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
2-1/2” x 3/16” 8-P-4 40.5 4.688 C 14063 11250 9375 8036 7031 6250 5625 5114 4688 4327 4018 3516 3125
8-P-2 42.4 D 0.024 0.037 0.054 0.073 0.095 0.121 0.149 0.180 0.215 0.252 0.292 0.381 0.483
W/P-8 PANEL WIDTH (inches) Note: Press-Locked cross bars typically extend 1/8” each side. W-Welded cross rods may extend 1/8” each side. 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 17 18 19 20 21 22 23 24 25 26 27 28 29
1/8” Bar 5
/8 11/8 15/8 21/8 25/8 31/8 35/8 41/8 45/8 51/8 55/8 61/8 65/8 71/8 75/8 81/8 85/8 91/8 95/8 101/8 105/8 111/8 115/8 121/8 125/8 131/8 135/8 141/8
3/16” Bar 11
/16 13/16 111/16 23/16 211/16 33/16 311/16 43/16 411/16 53/16 511/16 63/16 611/16 73/16 711/16 83/16 811/16 93/16 911/16 103/16 1011/16 113/16 1111/16 123/16 1211/16 133/16 1311/16 143/16
No. of Bars 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57
1/8” Bar 145/8 151/8 155/8 161/8 165/8 171/8 175/8 181/8 185/8 191/8 195/8 201/8 205/8 211/8 215/8 221/8 225/8 231/8 235/8 241/8 245/8 251/8 255/8 261/8 265/8 271/8 275/8 281/8
3/16” Bar 1411/16 153/16 1511/16 163/16 1611/16 173/16 1711/16 183/16 1811/16 193/16 1911/16 203/16 2011/16 213/16 2111/16 223/16 2211/16 233/16 2311/16 243/16 2411/16 253/16 2511/16 263/16 2611/16 273/16 2711/16 283/16
No. of Bars 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73
1/8” Bar 285/8 291/8 295/8 301/8 305/8 311/8 315/8 321/8 325/8 331/8 335/8 341/8 345/8 351/8 355/8 361/8
3/16” Bar 2811/16 293/16 2911/16 303/16 3011/16 313/16 3111/16 323/16 3211/16 333/16 3311/16 343/16 3411/16 353/16 3511/16 363/16

8
Steel Bar Grating Close-Mesh

WELDED (W) 7/16” C/C Bearing Bars press-locked (P) 7/16” C/C Bearing Bars
7-W-4 7-P-4 7-P-2

Welded Panels
Max 2’-0 Width
Cross Rods 4” C/C
Cross Bars 4” C/C Cross Bars 2” C/C
NON-SERRATED ONLY NON-SERRATED & SERRATED

LOAD & DEFLECTION TABLE General: Loads and deflections are theoretical and based on static loading.
U = safe uniform load, psf
C = safe concentrated load, psf
D = deflection, inches
E = modulus of elasticity, 29,000,000 psi

Bar Approx. Sec. Mod SPAN (Direction of Bearing Bar)
Symbol Weight Per Ft. F = fiber stress, 18,000 psi
Size psf Of Width 24” 30” 36” 42” 48” 54” 60” Material: ASTM A-1011
7-W-4 9.3 U 964 617 429 315 241 190 154 Deflection: Spans and loads to the right
3/4” x 1/8” D 0.099 0.155 0.223 0.304 0.397 0.503 0.621 of the bold line exceed 1/4” deflection
Non-Serrated Only 7-P-4 9.8 0.321 C 964 771 643 551 482 429 386 for uniform load of 100 psf which pro-
7-P-2 10.7 D 0.079 0.124 0.179 0.243 0.318 0.402 0.497 66” vides safe pedestrian comfort. These
7-W-4 13.7 U 1446 926 643 472 362 286 231 191 can be exceeded for other types of loads
3/4” x 3/16” D 0.099 0.155 0.223 0.304 0.397 0.503 0.621 0.751 with engineer’s approval.
Non-Serrated Only 7-P-4 14.6 0.482 C 1446 1157 964 827 723 643 579 526 Serrated Bars: For ser-
7-P-2 16.1 D 0.079 0.124 0.179 0.243 0.318 0.402 0.497 0.601 72” 78” rated grating, the depth
7-W-4 12.3 U 1714 1097 762 560 429 339 274 227 190 162 of grating required for
D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670 0.787 a specified load is
1” x 1/8” 7-P-4 12.7 0.571 C 1714 1371 1143 980 857 762 686 623 571 527 1/4” deeper
7-P-2 13.7 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 84” than that
7-W-4 18.1 U 2571 1646 1143 840 643 508 411 340 286 243 210 shown in the
D 0.074 0.116 0.168 0.228 0.298 0.377 0.466 0.563 0.670 0.787 0.912 table.
1” x 3/16” 7-P-4 19.0 0.857 C 2571 2057 1714 1469 1286 1143 1029 935 857 791 735
7-P-2 20.5 D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730 96”
7-W-4 15.3 U 2679 1714 1190 875 670 529 429 354 298 254 219 167
D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730 0.953
1-1/4” x 1/8” 7-P-4 16.0 0.893 C 2679 2143 1786 1531 1339 1190 1071 974 893 824 765 670
7-P-2 17.3 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 0.763 108”
7-W-4 22.5 U 4018 2571 1786 1312 1004 794 643 531 446 380 328 251 198
D 0.060 0.093 0.134 0.182 0.238 0.302 0.372 0.451 0.536 0.629 0.730 0.953 1.207
1-1/4” x 3/16” 7-P-4 23.9 1.339 C 4018 3214 2679 2296 2009 1786 1607 1461 1339 1236 1148 1004 893
7-P-2 25.8 D 0.048 0.074 0.107 0.146 0.191 0.241 0.298 0.360 0.429 0.504 0.584 0.763 0.965
7-W-4 18.1 U 3857 2469 1714 1259 964 762 617 510 429 365 315 241 190
D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 1/8” 7-P-4 18.9 1.286 C 3857 3086 2571 2204 1929 1714 1543 1403 1286 1187 1102 964 857
7-P-2 20.2 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
7-W-4 26.9 U 5786 3703 2571 1889 1446 1143 926 765 643 548 472 362 286
D 0.050 0.078 0.112 0.152 0.199 0.251 0.310 0.376 0.447 0.524 0.608 0.794 1.006
1-1/2” x 3/16” 7-P-4 28.3 1.929 C 5786 4629 3857 3306 2893 2571 2314 2104 1929 1780 1653 1446 1286
7-P-2 30.2 D 0.040 0.062 0.089 0.122 0.159 0.201 0.248 0.300 0.358 0.420 0.487 0.636 0.804
U 7875 5040 3500 2571 1969 1556 1260 1041 875 746 643 492 389
D 0.043 0.067 0.096 0.130 0.170 0.215 0.266 0.322 0.383 0.450 0.521 0.681 0.862
1-3/4” x 3/16” 7-P-4 32.7 2.625 C 7875 6300 5250 4500 3938 3500 3150 2864 2625 2423 2250 1969 1750
7-P-2 34.6 D 0.034 0.053 0.077 0.104 0.136 0.172 0.213 0.257 0.306 0.360 0.417 0.545 0.689
U 10286 6583 4571 3359 2571 2032 1646 1360 1143 974 840 643 508
D 0.037 0.058 0.084 0.114 0.149 0.189 0.233 0.282 0.335 0.393 0.456 0.596 0.754
2” x 3/16” 7-P-4 37.1 3.429 C 10286 8229 6857 5878 5143 4571 4114 3740 3429 3165 2939 2571 2286
7-P-2 39.0 D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
U 13018 8331 5786 4251 3254 2571 2083 1721 1446 1232 1063 814 643
D 0.033 0.052 0.074 0.101 0.132 0.168 0.207 0.250 0.298 0.350 0.406 0.530 0.670
2-1/4” x 3/16” 7-P-4 41.5 4.339 C 13018 10414 8679 7439 6509 5786 5207 4734 4339 4005 3719 3254 2893
7-P-2 43.4 D 0.026 0.041 0.060 0.081 0.106 0.134 0.166 0.200 0.238 0.280 0.324 0.424 0.536
U 16071 10286 7143 5248 4018 3175 2571 2125 1786 1522 1312 1004 794
D 0.030 0.047 0.067 0.091 0.119 0.151 0.186 0.225 0.268 0.315 0.365 0.477 0.603
2-1/2” x 3/16” 7-P-4 45.9 5.357 C 16071 12857 10714 9184 8036 7143 6429 5844 5357 4945 4592 4018 3571
7-P-2 47.8 D 0.024 0.037 0.054 0.073 0.095 0.121 0.149 0.180 0.215 0.252 0.292 0.381 0.483
P-7 PANEL WIDTH (inches) Note: P-Press-Locked cross bars typically extend 1/8” each side. 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 17 18 19 20 21 22 23 24 25 26 27 28 29
1/8” Bar 9
/16 1 17/16 17/8 25/16 23/4 33/16 35/8 41/16 41/2 415/16 53/8 513/16 61/4 611/16 71/8 79/16 8 87/16 8 7 /8 95/16 9 3 /4 103/16 105/8 111/16 111/2 1115/16 123/8
3/16” Bar 5
/8 11/16 11/2 115/16 23/8 213/16 31/4 311/16 41/8 49/16 5 57/16 57/8 65/16 63/4 73/16 75/8 81/16 8 1 /2 815/16 9 3 /8 913/16 101/4 1011/16 111/8 119/16 12 127/16
No. of Bars 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57
1/8” Bar 1213/16 131/4 1311/16 141/8 149/16 15 157/16 157/8 165/16 163/4 173/16 175/8 181/16 181/2 1815/16 193/8 1913/16 201/4 2011/16 211/8 219/16 22 227/16 227/8 235/16 233/4 243/16 245/8
3/16” Bar 127/8 135/16 133/4 143/16 145/8 151/16 151/2 1515/16 163/8 1613/16 171/4 1711/16 181/8 189/16 19 197/16 197/8 205/16 203/4 213/16 215/8 221/16 221/2 2215/16 233/8 2313/16 241/4 2411/16
No. of Bars 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83
1/8” Bar 251/16 251/2 2515/16 263/8 2613/16 271/4 2711/16 281/8 289/16 29 297/16 297/8 305/16 303/4 313/16 315/8 321/16 321/2 3215/16 333/8 3313/16 341/4 3411/16 351/8 359/16 36
3/16” Bar 251/8 259/16 26 267/16 267/8 275/16 273/4 283/16 285/8 291/16 291/2 2915/16 303/8 3013/16 311/4 3111/16 321/8 329/16 33 337/16 337/8 345/16 343/4 353/16 355/8 361/16

9
Anchoring Details

Type H-3 Saddle Clip Type H-1 Anchor Clip

The saddle clip bridges two bearing bars and A flat head J-bolt secures a preformed plate to
is attached with 1/4” self-tapping bolt, 1/4” self the underside of steel bearing bars and structural
threader, 1/4” weld stud or 1/4” bolt and nut supporting flange. No drilling needed. Access to
when hole is drilled through supporting flange. the underside of grating is required for installation.
Available for 15/16”, 1-3/16” and 1-3/8” bear- Available in carbon steel. J-bolt is 1/4” x 2-1/2” for
ing bar spacings (15, 19 and 22 space) in grating up to 2-1/4” deep and 1/4” x 3-1/2” for 2-1/2”
carbon and stainless steel. Fasteners should to 3-1/2” deep grating.

Welds
Recommended for all permanently installed grating
panels. Welds should be 3/16” fillet welds, 3/4” long
located approximately 6” from each side of panel (4
locations) and one weld in middle of panel at each
intermediate support.

Attachment Locations
Attachments should be placed at intermediate supports in the middle of
the panels and at the four bearing bar ends, 6” from each side of panel. Weld Lugs
Welds should be 3/16” fillet welds, 3/4” long. Heavy-Duty grating may Weld lugs may be used for installations
require additional welding to meet application needs. where grating is subject to removal. Weld
lugs are shop fabricated and must be
specified at time of grating order. Fasten-
ers are 1/4” minimum and supplied by
Other clips and fasteners available upon request. others. Location is the same as “Attach-
ment Locations” diagram.
Installation Clearances

PANEL TO PANEL CLEARANCES AND CUTOUT CLEARANCES

1/4” clearance*
between ends of
cross bars or
cross rods on
rectangular
grating or rivet
heads on riveted
grating. (3/8”
clearance for
heavy-duty grating).

............. Specified
_______ Actual

All panel width dimensions 3/8”

(including cutout) are given
to the nearest bearing bar. *Cross rods may extend 1/8” from bearing bars.

All rectangular cutouts are made to the next bearing

bar beyond the penetration with a clearance not to
exceed bearing bar spacing.

SUPPORT CLEARANCES

I-Beam and Angle Curb I-Beam and Kickplate I-Beam and Handrail I-Beam

*1/4” is recommended but dimension may vary due to bearing bar spacing.
Dimension should not exceed bearing bar spacing.

Channel Toed Out Channel Toed In Angle in Concrete Concrete

Welding Standards

ToePlates
Maximum depth of toeplate is (a+d). It should not extend below the bearing
bars. The minimum recommended dimension for “a”, the projection of toe
plate above the grating, is 4”.

Attachment to End of Bearing Bar

Load carrying toeplates to be welded at each bearing bar with a fillet weld
Attachment to Length of Bearing Bar the size of the bearing bar thickness (t), 3/4” long. Non-load carrying
Toeplate to be welded with alternating 1/8” fillet welds, 1” long every 12”. toeplates to be welded to bearing bars with 1/8” fillet weld (3/16” for
heavy-duty), 3/4” long every 5”.

banding

Load Banding (must specify)

Standard Trim Band
Load carrying end band to be welded with fillet weld the size of bearing
End band to be welded with 1/8” fillet welds (3/16” for heavy duty), 3/4”
bar thickness (t) and the length of bearing bar depth (d) at each bearing
long every 5”.
bar. This spec is for standard grating. Refer to NAAMM MBG 532 for heavy
duty specification.

55
 Manufacturing Tolerances

BEARING BAR AND CROSS ROD TOLERANCES

Cross Rod Position

The top of the cross rod should not project more than 1/16” above the top
of the bearing bars for standard grating (1/8” for heavy-duty) and should
not extend more than 1/8” from side of bearing bars.

Cross Rod Spacing and Alignment

Cross rods should not vary more than 1/8 in 12 in either direction from
perpendicular alignment with bearing bars. The tolerance of the cross bar Bearing Bar Lean
spacing for 5’ in length is ±1/4”. Bearing bar lean must not exceed a slope of 1-1/4 to 12.

Cross Bar Lean

Cross bar lean must not exceed a slope of 2-1/2 to 12.

PANEL TOLERANCES

Longitudinal Bow
Longitudinal bow should be less than 1/200 of the length for standard
grating (1/240 for heavy duty).

Tranverse Bow
Before banding, the tranverse bow should be less than 1/8” per foot of
width. Overall Dimensions and Squareness
D = Overall diagonal dimension
AMICO manufactures grating to meet or exceed ANSI/NAAMM MBG531; W = Length of cross rods including extensions outside of bearing bars
and Heavy Duty Metal Bar Grating to ANSI/NAAMM MBG532. L = Length of bearing bars

56
 UNITED STATES

Birmingham, AL
800-366-2642
Chicago, IL
800-238-0322
Dayton, TX
800-622-5765
Denver, CO
800-425-5558
Fontana, CA
800-962-0100
Greenville, SC
800-476-4430
Houston, TX
800-433-9945
Lafayette, LA
800-326-8842
Lakeland, FL
800-487-2511
N. Kansas City, MO
800-472-3121
Orem, UT
800-645-0340
Seattle, WA
800-859-5363
Visalia, CA
800-642-4334
Wilmington, DE
800-476-4430

CANADA

Burlington, ON
800-663-4474
Montreal, QC
800-463-3255
Vancouver, BC
800-665-4474

QUALITY PRODUCTS – COAST TO COAST

2001.7 Digital Version

1/11-5,000