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:
Loads and deflections are theoretical and based on static loading.
Bar SizeSymbol# per sfSec. Mod per ft. of width
SAFE SPAN (Direction of Bearing Bar)
2′-02′-63′-03′-64′-04′-65′-0
3/4″ x 1/8″ Non-Serrated Only11W46.20.21U
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 Only11W49.10.31U
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′-66′-06′-6
1″ x 1/8″11W4
11W2
8.1
8.6
0.36U
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
0.55U
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′-67′-08′-09′-0
1-1/4″ x 1/8″11W4
11W2
10.0 10.50.57U
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
0.85U
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 12.40.82U
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
1.23U
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
1.67U
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
2.18U
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
2.76U
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
3.41U
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.
Panel widths do not include these extensions.

No. of Bars2345678910111213141516
1/8″ Bar13/16″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″ Bar7/8″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 Bars171819202122232425262728293031
1/8″ Bar11-1/8″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″ Bar11-3/16″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 Bars323334353637383940414243444546
1/8″ Bar21-7/16″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″ Bar21-1/2″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 Bars47484950515253
1/8″ Bar31-3/4″32-7/16″33-1/8″33-13/16″34-1/2″35-3/16″35-7/8″
3/16″ Bar31-13/16″32-1/2″33-3/16″33-7/8″34-9/16″35-1/4″35-15/16″