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′-05′-6
3/4″ x 1/8″ Non-Serrated Only7W49.30.32U
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 Only7W413.70.48U
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′-06′-67′-0
1″ x 1/8″7W412.30.57U
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″7W418.10.86U
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′-09′-0
1-1/4″ x 1/8″7W415.30.89U
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″7W422.51.34U
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″7W418.11.29U
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″7W426.91.93U
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″2.63U
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″3.43U
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″4.34U
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″5.36U
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)
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″ Bar9/16″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″ Bar5/8″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 Bars171819202122232425262728293031
1/8″ Bar7-1/8″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″ Bar7-3/16″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 Bars323334353637383940414243444546
1/8″ Bar13-11/16″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″ Bar13-3/4″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 Bars474849505152535455565758596061
1/8″ Bar20-1/4″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″ Bar20-5/16″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 Bars626364656667686970717273747576
1/8″ Bar26-13/16″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″ Bar26-7/8″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 Bars77787980818283
1/8″ Bar33-3/8″33-13/16″34-1/4″34-11/16″35-1/8″35-9/16″36″
3/16″ Bar33-7/16″33-7/8″34-5/16″34-3/4″35-3/16″35-5/8″36-1/16″