Safe Load Table for Aluminum Bar Grating
Based on Type N Serrated Aluminum Grating

Size No.
Bearing Bar Size In Inches
Grating Span
2' 0"
2' 6"
3' 0"
3' 6"
4' 0"
4' 6"
5' 0"
5' 6"
6' 0"
6' 6"
7' 0"
7' 6"
8' 0"
1
3/4 x 1/8
Plain Top Only
U
179
115
80
 
 
 
 
 
 
 
 
 
D
.230
.360
.517
 
 
 
 
 
 
 
 
 
 
C
179
143
119
 
 
 
 
 
 
 
 
 
 
D
.185
.288
.414
 
 
 
 
 
 
 
 
 
 
2
3/4 x 3/16
Plain Top Only
U
269
172
119
88
 
 
 
 
 
 
 
 
 
D
.230
.360
.517
.703
 
 
 
 
 
 
 
 
 
C
269
215
179
153
 
 
 
 
 
 
 
 
 
D
.185
.288
.414
.563
 
 
 
 
 
 
 
 
 
3
1 x 1/8
U
351
255
156
115
88
 
 
 
 
 
 
 
 
D
.164
.257
.370
.506
.660
 
 
 
 
 
 
 
 
C
351
281
234
201
175
 
 
 
 
 
 
 
 
D
.132
.205
.296
.404
.525
 
 
 
 
 
 
 
 
4
1 x 3/16
U
526
337
234
172
132
104
 
 
 
 
 
 
 
D
.164
.257
.370
.504
.660
.833
 
 
 
 
 
 
 
C
526
421
351
301
263
234
 
 
 
 
 
 
 
D
.132
.205
.296
.403
.526
.667
 
 
 
 
 
 
 
5
1 1/4x 1/8
U
580
371
258
189
145
115
93
 
 
 
 
 
 
D
.128
.200
.288
.391
.512
.650
.802
 
 
 
 
 
 
C
580
464
387
331
290
258
232
 
 
 
 
 
 
D
.102
.160
.231
.313
.410
.519
.640
 
 
 
 
 
 
6
1 1/4 x 3/16
U
872
558
387
285
218
172
139
115
 
 
 
 
 
D
.128
.200
.288
.393
.513
.648
.800
.967
 
 
 
 
 
C
872
697
581
498
436
387
349
317
 
 
 
 
 
D
.103
.160
.230
.314
.410
.519
.642
.776
 
 
 
 
 
7
1 1/2 x 1/8
U
867
555
385
283
217
171
139
115
96
 
 
 
 
D
.105

.164
.236
.321
.420
.530
.656
.795
.940
 
 
 
 
C
867
693
578
495
433
385
347
315
289
 
 
 
 
D
.084
.131
.189
.256
.335
.424
.524
.633
.754
 
 
 
 
8
1 1/2 x 3/16
U
1300

832
578
424
325
257
208
172
144
123
 
 
 
D
.105
.164
.236
.320
.419
.531
.655
.793
.940
1.106
 
 
 
C
1300
1040
867
473
650
578
520
473
433
400
 
 
 
D
.084
.131
.189
.257
.335
.424
.524
.634
.754
.885
 
 
 
9
1 3/4 x 3/16
U
1815
1162
807
593
454
359
290
240
202
172
148
 
 
D
.089
.138
.199
.271
.355
.449
.553
.670
.799
.937
1.084
 
 
C
1815
1452
1210
1037
908
807
726
660
605
559
519
 
 
D
.071
.111
.159
.217
.284
.359
.443
.536
.638
.749
.869
 
 
10
2 x 3/16
U
2417
1547
1074
789
604
477
387
320
269
229
197
172
 
D
.077
.120
.173
.235
.307
.388
.480
.582
.391
.812
.939
1.081
 
C
2417
1934
1611
1381
1208
1074
967
879
806
744
691
645
 
D
.061
.096
.138
.188
.246
.311
.384
.465
.553
.649
.753
.865
 
11
2 1/4 x 3/16
U
3104
1987
1380
1014
766
613
497
411
345
294
253
221
194
D
.068
.106
.149
.208
.271
.343
.424
.513
.610
.716
.829
.954
1.084
C
3104
2484
2070
1774
1552
1380
1242
.129
1035
955
887
828
776
D
.054
.085
.122
.166
.217
.274
.339
.410
.488
.572
.664
.762
.867

Notes
U= Uniform load, pounds per square foot
D= Deflection in inches
C= Concentrated load, pounds per foot of width.
REMINDER: Load Values fro Plain Top (N-PL) are higher and the Deflections are Lower

Conversion Information for Grating other than Type N Serrated Aluminum Grating
Conversion Data
(Serrated to Plain)
Size
Multiply "U" and "C" by:
Multiply "D" by:
3/4 x 1/8
1.440
0.833
3/4 x 3/16
1.440
0.833
1 x 1/8
1.306
0.875
1 x 3/16
1.306
0.875
1-1/4 x 1/8
1.235
0.900
1-1/4 x 3/16
1.235
0.900
1-1/2 x 1/8
1.190
0.917
1-1/2 x 3/16
1.190
0.917
1-3/4 x 3/16
1.160
0.929
2 x 3/16
1.138
0.937
2-1/4 x 3/16
1.121
0.944
Load Converstion Multipliers
(Type W, R, S, T, U)
To determine Safe Load Values for other types of Aluminum Grating, multiply "U" and "C" of type "N" by conversion factors below:
Type
W
R&S
T
U
1/8" Bearing Bars
1.00
1.27
1.82
2.91
3/16" Bearing Bars
1.00
1.18
1.64
2.55
NOTE: Deflections under factored loads remain the same as type "N" grating