[vc_row][vc_column width=”2/3″][vc_column_text]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.[/vc_column_text][vc_column_text][/vc_column_text][/vc_column][vc_column width=”1/3″][vc_single_image image=”166″ img_size=”full”][/vc_column][/vc_row][vc_row][vc_column][vc_column_text]

LOAD & DEFLECTION TABLE:
Loads and deflections are theoretical and based on static loading.
Bar Size Symbol # per sf Sec. Mod per ft. of width
SAFE SPAN (Direction of Bearing Bar)
2′-0 2′-6 3′-0 3′-6 4′-0 4′-6 5′-0 5′-6
3/4″ x 1/8″ Non-Serrated Only 7W4 9.3 0.32 U
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 Only 7W4 13.7 0.48 U
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′-0 6′-6 7′-0
1″ x 1/8″ 7W4 12.3 0.57 U
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″ 7W4 18.1 0.86 U
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′-0 9′-0
1-1/4″ x 1/8″ 7W4 15.3 0.89 U
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″ 7W4 22.5 1.34 U
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″ 7W4 18.1 1.29 U
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″ 7W4 26.9 1.93 U
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″ 2.63 U
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″ 3.43 U
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″ 4.34 U
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″ 5.36 U
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

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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 Bars 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1/8″ Bar 9/16″ 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″ Bar 5/8″ 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 Bars 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
1/8″ Bar 7-1/8″ 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″ Bar 7-3/16″ 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 Bars 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
1/8″ Bar 13-11/16″ 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″ Bar 13-3/4″ 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 Bars 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61
1/8″ Bar 20-1/4″ 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″ Bar 20-5/16″ 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 Bars 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76
1/8″ Bar 26-13/16″ 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″ Bar 26-7/8″ 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 Bars 77 78 79 80 81 82 83
1/8″ Bar 33-3/8″ 33-13/16″ 34-1/4″ 34-11/16″ 35-1/8″ 35-9/16″ 36″
3/16″ Bar 33-7/16″ 33-7/8″ 34-5/16″ 34-3/4″ 35-3/16″ 35-5/8″ 36-1/16″

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