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.

19w4spec
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′-6
3/4″ x 1/8″ Non-Serrated Only19W43.90.12U
D
355
0.099
227
0.155
158
0.223
116
0.304
89
0.397
70
0.503
19P4
19P2
4.3
5.2
C
D
355
0.079
284
0.124
237
0.179
203
0.243
178
0.318
158
0.402
3/4″ x 3/16″ Non-Serrated Only19W45.60.18U
D
533
0.099
341
0.155
237
0.223
174
0.304
133
0.397
105
0.503
19P4
19P2
6.4
7.8
C
D
533
0.079
426
0.124
355
0.179
305
0.243
266
0.318
237
0.402
5′-05′-6
1″ x 1/8″19W4
19W2
5.0
5.5
0.21U
D
632
0.074
404
0.116
281
0.168
206
0.228
158
0.298
125
0.377
101
0.466
84
0.563
19P4
19P2
5.4
6.3
C
D
632
0.060
505
0.093
421
0.134
361
0.182
316
0.238
281
0.302
253
0.372
230
0.451
1″ x 3/16″19W4
19W2
7.2
7.8
0.32U
D
947
0.074
606
0.116
421
0.168
309
0.228
237
0.298
187
0.377
152
0.466
125
0.563
19P4
19P2
8.1
9.5
C
D
947
0.060
758
0.093
632
0.134
541
0.182
474
0.238
421
0.302
379
0.372
344
0.451
6′-06′-67′-0
1-1/4″ x 1/8″19W4
19W2
6.1
6.6
0.33U
D
987
0.060
632
0.093
439
0.134
322
0.182
247
0.238
195
0.302
158
0.372
130
0.451
110
0.536
93
0.629
81
0.730
19P4
19P2
6.8
8.1
C
D
987
0.048
789
0.074
658
0.107
564
0.146
493
0.191
439
0.241
395
0.298
359
0.360
329
0.429
304
0.504
282
0.584
1-1/4″ x 3/16″19W4
19W2
8.9
9.5
0.49U
D
1480
0.060
947
0.093
658
0.134
483
0.182
370
0.238
292
0.302
237
0.372
196
0.451
164
0.536
140
0.629
121
0.730
19P4
19P2
10.2
12.1
C
D
1480
0.048
1184
0.074
987
0.107
846
0.146
740
0.191
658
0.241
592
0.298
538
0.360
493
0.429
455
0.504
423
0.584
8′-09′-0
1-1/2″ x 1/8″19W4
19W2
7.2
7.7
0.47U
D
1421
0.050
909
0.078
632
0.112
464
0.152
355
0.199
281
0.251
227
0.310
188
0.376
158
0.447
135
0.524
116
0.608
89
0.794
70
1.006
19P4
19P2
7.9
9.2
C
D
1421
0.040
1137
0.062
947
0.089
812
0.122
711
0.159
632
0.201
568
0.248
517
0.300
474
0.358
437
0.420
406
0.487
554
0.636
316
0.804
1-1/2″ x 3/16″19W4
19W2
10.5
11.2
0.71U
D
2132
0.050
1364
0.078
947
0.112
696
0.152
533
0.199
421
0.251
341
0.310
282
0.376
237
0.447
202
0.524
174
0.608
133
0.794
105
1.006
19P4
19P2
11.8
13.8
C
D
2132
0.040
1705
0.062
1421
0.089
1218
0.122
1066
0.159
947
0.201
853
0.248
775
0.300
711
0.358
656
0.420
609
0.487
533
0.636
474
0.804
1-3/4″ x 3/16″19W4
19W2
12.2
12.8
0.97U
D
2901
0.043
1857
0.067
1289
0.096
947
0.130
725
0.170
573
0.215
464
0.266
384
0.322
322
0.383
275
0.450
237
0.521
181
0.681
143
0.862
19P4
19P2
13.5
15.4
C
D
1901
0.034
2321
0.053
1934
0.077
1658
0.104
1451
0.136
1289
0.172
1161
0.213
1055
0.257
967
0.306
893
0.360
829
0.417
725
0.545
645
0.689
2″ x 3/16″19W4
19W2
13.9
14.5
1.26U
D
3789
0.037
2425
0.058
1684
0.084
1237
0.114
947
0.149
749
0.189
606
0.233
501
0.282
421
0.335
359
0.393
309
0.456
237
0.596
187
0.754
19P4
19P2
15.2
17.1
C
D
3789
0.030
3032
0.047
2526
0.067
2165
0.091
1895
0.119
1684
0.151
1516
0.186
1378
0.225
1263
0.268
1166
0.315
1083
0.365
947
0.477
842
0.603
2-1/4″ x 3/16″19W4
19W2
15.5
16.1
1.6U
D
4796
0.033
3069
0.052
2132
0.074
1566
0.101
1199
0.132
947
0.168
767
0.207
634
0.250
533
0.298
454
0.350
392
0.406
300
0.530
237
0.670
19P4
19P2
16.8
18.7
C
D
4796
0.026
3837
0.041
3197
0.060
2741
0.081
2398
0.106
2132
0.134
1918
0.166
1744
0.200
1599
0.238
1476
0.280
1370
0.324
1199
0.424
1066
0.536
2-1/2″ x 3/16″19W4
19W2
17.2
17.8
1.97U
D
5921
0.030
3789
0.047
2632
0.067
1933
0.091
1480
0.119
1170
0.151
947
0.186
783
0.225
658
0.268
561
0.315
483
0.365
370
0.477
1292
0.603
19P4
19P2
18.5
20.4
C
D
5921
0.024
4737
0.037
3947
0.054
3383
0.073
2961
0.095
2632
0.121
2368
0.149
2153
0.180
1974
0.215
1822
0.252
1692
0.292
1480
0.381
1316
0.483
19W4 & 19P4 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″ Bar1-5/16″2-1/2″3-11/16″4-7/8″6-1/16″7-1/4″8-7/16″9-5/8″10-13/16″12″13-3/16″14-3/8″15-9/16″16-3/4″17-15/16″
3/16″ Bar1-3/8″2-9/16″3-3/4″4-15/16″6-1/8″7-5/16″8-1/2″9-11/16″10-7/8″12-1/16″13-1/4″14-7/16″15-5/8″16-13/16″18″
No. of Bars171819202122232425262728293031
1/8″ Bar19-1/8″20-5/16″21-1/2″22-11/16″23-7/8″25-1/16″26-1/4″27-7/16″28-5/8″29-13/16″31″32-3/16″33-3/8″34-9/16″35-3/4″
3/16″ Bar19-3/16″20-3/8″21-9/16″22-3/4″23-15/16″25-1/8″26-5/16″27-1/2″28-11/16″29-7/8″31-1/16″32-1/4″33-7/16″34-5/8″35-13/16″