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″