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19-4 / 19-2 LOAD TABLE

BEARING BAR SIZE

UNSUPPORTED SPAN

 WEIGHT PER SQ. FT.(LBS.)
2'-0" 2'-6" 3'-0" 3'-6" 4'-0" 4'-6" 5'-0" 5'-6" 6'-0" 6'-6" 7'-0" 8'-0" 9'-0" 19-4 19-2 15-4 15-2 11-4 11-2 7-4 7-2
1 X 1/8 U
D
C
D		 421
.144
421
.115		 269
.225
337
.180		 187
.324
281
.259		 137
.441
241
.353		 105
.576
211
.461		 83
.729
187
.583
LOADS AND DEFLECTIONS ARE THEORETICAL VALUES BASED ON 12,000 PSI UNIT STRESS. FOR PEDESTRIAN COMFORT DEFLECTIONS IN EXCESS OF 1/4" ARE NOT RECOMMENDED.
C=SAFE CONCENTRATED MID-SPAN LOAD, LBS.PER FT. OF GRATING WIDTH
D=DEFLECTION IN INCHES
1.8 2.2 2.2 2.6 2.9 3.3 4.4 4.7
1 X 3/16
OR 1" I-BAR		 U
D
C
D		 632
.144
632
.115		 404
.225
505
.180		 281
.324
421
.259		 206
.441
361
.353		 158
.576
316
.461		 125
.729
281
.583		 2.6 2.9 3.2 3.5 4.2 4.5 6.4 6.7
1-1/4 X 1/8 U
D
C
D		 658
.115
658
.092		 421
.180
526
.144		 292
.259
439
.207		 215
.353
376
.282		 164
.461
329
.369		 130
.583
292
.467		 105
.720
263
.576		 87
.871
239
.697		 73
1.037
219
.829		 - 2.2 2.5 2.7 3.0 3.6 3.9 5.4 5.7
1-1/4 X 3/16
OR 1-1/4" I-BAR		 U
D
C
D		 987
.115
987
.092		 632
.180
789
.144		 439
.259
658
.207		 322
.353
564
.282		 247
.461
493
.369		 195
.583
439
.467		 158
.720
395
.576		 130
.871
359
.697		 110
1.037
329
.829

93
1.217
304
.973

81
1.411
282
1.129

 - 3.1 3.5 3.9 4.2 5.2 5.5 7.9 8.3
1-1/2 X 1/8 U
D
C
D		 947
.096
947
.077		 606
.150
758
.120		 421
.216
632
.173		 309
.294
541
.235		 237
.384
474
.307		 187
.486
421
.389		 152
.600
379
.480		 125
.726
344
.581		 105
.864
316
.691		 90
1.014
291
.811		 77
1.176
271
.941		 67
1.350
253
1.080		 59
1.536
237
1.229		 2.6 2.9 3.2 3.5 4.2 4.5 6.4 6.7
1-1/2 X 3/16
OR 1-1/2" I-BAR		 U
D
C
D		 1421
.096
1421
.077		 909
.150
1137
.120		 632
.216
947
.173		 464
.294
812
.235		 355
.384
711
.307		 281
.486
632
.389		 227
.600
568
.480		 188
.726
517
.581		 158
.864
474
.691		 135
1.014
437
.811		 116
1.176
406
.941		 101
1.350
379
1.080		 89
1.536
355
1.229		 3.7 4.0 4.6 4.9 6.1 6.5 9.4 9.8
1-3/4 X 3/16
OR 1-3/4" I-BAR		 U
D
C
D		 1934
.082
1934
.066		 1238
.129
1547
.103		 860
.185
1289
.148		 632
.252
1105
.202		 484
.329
967
.263		 382
.417
860
.333		 309
.514
774
.411		 256
.622
703
.498		 215
.741
645
.592		 183
.869
595
.695		 158
1.008
553
.806		 138
1.157
516
.926		 121
1.317
484
1.053		 4.2 4.6 5.3 5.6 7.1 7.4 10.9 11.3
2 X 3/16
OR 2" I-BAR		 U
D
C
D		 2526
.072
2526
.058		 1617
.113
2021
.090		 1123
.162
1684
.130		 825
.221
1444
.176		 632
.288
1263
.230		 499
.365
1123
.292		 404
.450
1011
.360		 334
.545
919
.436		 281
.648
842
.518		 239
.761
777
.608		 206
.882
722
.706		 180
1.013
674
.810		 158
1.152
632
.922		 4.8 5.1 6.0 6.3 8.0 8.4 12.4 12.8
2-1/4 X 3/16
OR 2-1/4" I-BAR		 U
D
C
D		 3197
.064
3197
.051		 2046
.100
2558
.080		 1421
.144
2132
.115		 1044
.196
1827
.157		 799
.256
1599
.205		 632
.324
1421
.259		 512
.400
1279
.320		 423
.484
1163
.387		 355
.576
1066
.461		 303
.676
984
.541		 261
.784
914
.627		 227
.900
853
.720		 200
1.024
799
.819		 5.4 5.7 6.7 7.0 9.0 9.3 14.0 14.3
2-1/2 X 3/16
OR 2-1/2" I-BAR		 U
D
C
D		 3947
.058
3947
.046		 2526
.090
3158
.072		 1754
.130
2632
.104		 1289
.176
2256
.141		 987
.230
1974
.184		 780
.292
1754
.233		 632
.360
1579
.288		 522
.436
1435
.348		 439
.518
1316
.415		 374
.608
1215
.487		 322
.706
1128
.564		 281
.810
1053
.648		 247
.922
987
.737		 5.9 6.3 7.4 7.7 10.0 10.3 15.5 15.8
NOTE: WHEN GRATINGS WITH SERRATED BEARING BARS ARE SELECTED, THE DEPTH OF GRATING REQUIRED TO SERVICE A SPECIFIED LOAD WILL BE 1/4" GREATER THAN THAT SHOWN IN THE TABLES ABOVE.

 

CONVERSION TABLE
The loads shown above are for type 19-4 and 19-2 gratings.  To determine the load capacity for alternative bar spacings, multiply the loads given by the following conversion factors (DEFLECTION REMAINS CONSTANT):
FOR TYPES 15-4 AND 15-2: 1.26   FOR TYPES 11-4 AND 11-2: 1.72 FOR TYPES 7-4 AND 7-2: 2.71

 

SELECTION GUIDE: 19-4 PLAIN SURFACE GRATING
        For deflection of not more than 1/4" when subjected to the severest of the following: (1) the uniform loads below; (2) under concentrated mid-span loads of 300 lbs. up to 6'-0" span; or (3) 400 lbs. for spans 6'-0" and over.

SAFE
UNIF.
LOAD
LBS./
SQ.FT.

2'-0"

 2'-6" 3'-0" 3'-6"   4'-0" 4'-6" 5'-0" 5'-6" 6'-0" 6'-6" 7'-0"
50
75
100
125
150
200
300		 1 x 1/8
1 x 1/8
1 x 1/8
1 x 1/8
1 x 1/8
1 x 1/8
1 x 1/8		 1 x 1/8
1 x 1/8
1 x 1/8
1 x 1/8
1 x 1/8
1 x 1/8
1 x 3/16		 1 x 3/16
1 x 3/16
1 x 3/16
1 x 3/16
1 x 3/16
1 x 3/16
1-1/4 x 3/16		 1 x 3/16
1 x 3/16
1 x 3/16
1-1/4 x 3/16
1-1/4 x 3/16
1-1/4 x 3/16
1-1/2 x 3/16		 1 x 3/16
1-1/4 x 3/16
1-1/4 x 3/16
1-1/4 x 3/16
1-1/2 x 3/16
1-1/2 x 3/16
1-3/4 x 3/16		 1-1/4 x 3/16
1-1/4 x 3/16
1-1/2 x 3/16
1-1/2 x 3/16
1-3/4 x 3/16
1-3/4 x 3/16
2 x 3/16		 1-1/2 x 3/16
1-1/2 x 3/16
1-3/4 x 3/16
1-3/4 x 3/16
1-3/4 x 3/16
2 x 3/16
2-1/4 x 3/16		 1-3/4 x 3/16
1-3/4 x 3/16
1-3/4 x 3/16
2 x 3/16
2 x 3/16
2-1/4 x 3/16
2-1/2 x 3/16		 2 x 3/16
2 x 3/16
2 x 3/16
2-1/4 x 3/16
2-1/4 x 3/16
2-1/2 x 3/16
-		 2-1/4 x 3/16
2-1/4 x 3/16
2-1/4 x 3/16
2-1/2 x 3/16
2-1/2 x 3/16
-
-		 2-1/2 x 3/16
2-1/2 x 3/16
2-1/2 x 3/16
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