15W4 15P4

15W4 15P4 15W2 15P2

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.

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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)
Bar Size	Symbol	# per sf	Sec. Mod per ft. of width		2'-0	2'-6	3'-0	3'-6	4'-0	4'-6	5'-0
3/4" x 1/8" Non-Serrated Only	15W4	4.7	0.15	U D	450 0.099	288 0.155	200 0.223	147 0.304	113 0.397	89 0.503
3/4" x 1/8" Non-Serrated Only	15P4 15P2	5.1 6.1	0.15	C D	450 0.079	360 0.124	300 0.179	257 0.243	225 0.318	200 0.402
3/4" x 3/16" Non-Serrated Only	15W4	6.9	0.23	U D	675 0.099	432 0.155	300 0.223	220 0.304	169 0.397	133 0.503	108 0.621
3/4" x 3/16" Non-Serrated Only	15P4 15P2	7.7 9.1	0.23	C D	675 0.079	540 0.124	450 0.179	386 0.243	338 0.318	300 0.402	270 0.497
												5'-6	6'-0
1" x 1/8"	15W4 15W2	6.1 6.7	0.27	U D	800 0.074	512 0.116	356 0.168	261 0.228	200 0.298	158 0.377	128 0.466	106 0.563	89 0.670
1" x 1/8"	15P4 15P2	6.5 7.5	0.27	C D	800 0.060	640 0.093	533 0.134	457 0.182	400 0.238	356 0.302	320 0.372	291 0.451	267 0.536
1" x 3/16"	15W4 15W2	8.9 9.6	0.4	U D	1200 0.074	768 0.116	533 0.168	392 0.228	300 0.298	237 0.377	192 0.466	159 0.563	133 0.670
1" x 3/16"	15P4 15P2	9.8 11.2	0.4	C D	1200 0.060	960 0.093	800 0.134	686 0.182	600 0.238	533 0.302	480 0.372	436 0.451	400 0.536
														6'-6	7'-0
1-1/4" x 1/8"	15W4 15W2	7.5 8.1	0.42	U D	1250 0.060	800 0.093	556 0.134	408 0.182	313 0.238	247 0.302	200 0.372	165 0.451	139 0.536	118 0.629	102 0.730
1-1/4" x 1/8"	15P4 15P2	8.2 9.5	0.42	C D	1250 0.048	1000 0.074	833 0.107	714 0.146	625 0.191	556 0.241	500 0.298	455 0.360	417 0.429	385 0.504	357 0.584
1-1/4" x 3/16"	15W4 15W2	11.0 11.6	0.63	U D	1875 0.060	1200 0.093	833 0.134	612 0.182	469 0.238	370 0.302	300 0.372	248 0.451	208 0.536	178 0.629	153 0.730
1-1/4" x 3/16"	15P4 15P2	12.3 14.2	0.63	C D	1875 0.048	1500 0.074	1250 0.107	1071 0.146	938 0.191	833 0.241	750 0.298	682 0.360	625 0.429	577 0.504	536 0.584
																8'-0	9'-0
1-1/2" x 1/8"	15W4 15W2	8.9 9.4	0.6	U D	1800 0.050	1152 0.078	800 0.112	588 0.152	450 0.199	365 0.251	288 0.310	238 0.376	200 0.447	170 0.524	147 0.608	113 0.794	89 1.006
1-1/2" x 1/8"	15P4 15P2	9.6 10.9	0.6	C D	1800 0.040	1440 0.062	1200 0.089	1029 0.122	900 0.159	800 0.201	720 0.248	655 0.300	600 0.358	554 0.420	514 0.487	450 0.636	400 0.804
1-1/2" x 3/16"	15W4 15W2	13.1 13.7	0.9	U D	2700 0.050	1728 0.078	1200 0.112	882 0.152	675 0.199	533 0.251	432 0.310	357 0.376	300 0.447	256 0.524	220 0.608	169 0.794	133 1.006
1-1/2" x 3/16"	15P4 15P2	14.4 16.3	0.9	C D	2700 0.040	2160 0.062	1800 0.089	1543 0.122	1350 0.159	1200 0.201	1080 0.248	982 0.300	900 0.358	831 0.420	771 0.487	675 0.636	600 0.804
1-3/4" x 3/16"	15W4 15W2	15.2 15.8	1.23	U D	3675 0.043	2352 0.067	1633 0.096	1200 0.130	919 0.170	726 0.215	588 0.266	486 0.322	408 0.383	348 0.450	300 0.521	230 0.681	181 0.862
1-3/4" x 3/16"	15P4 15P2	16.5 18.4	1.23	C D	3675 0.034	2940 0.053	2450 0.077	2100 0.104	1838 0.136	1633 0.172	1470 0.213	1366 0.257	1225 0.306	1131 0.360	1050 0.417	919 0.545	817 0.689
2" x 3/16"	15W4 15W2	17.3 17.9	1.6	U D	4800 0.037	3072 0.058	2133 0.084	1567 0.114	1200 0.149	948 0.189	768 0.233	635 0.282	533 0.335	454 0.393	392 0.456	300 0.596	237 0.754
2" x 3/16"	15P4 15P2	18.6 20.5	1.6	C D	4800 0.030	3840 0.047	3200 0.067	2743 0.091	2400 0.119	2133 0.151	1920 0.186	1745 0.225	1600 0.268	1477 0.315	1371 0.365	1200 0.477	1067 0.603
2-1/4" x 3/16"	15W4 15W2	19.4 20.0	2.03	U D	6075 0.033	3888 0.052	2700 0.074	1984 0.101	1519 0.132	1200 0.168	972 0.207	803 0.250	675 0.298	575 0.350	496 0.406	380 0.530	300 0.670
2-1/4" x 3/16"	15P4 15P2	20.7 22.6	2.03	C D	6075 0.026	4860 0.041	4050 0.060	3471 0.081	3038 0.106	2700 0.134	2430 0.166	2209 0.200	2025 0.238	1869 0.280	1736 0.324	1519 0.424	1350 0.536
2-1/2" x 3/16"	15W4 15W2	21.4 22.0	2.5	U D	7500 0.030	4800 0.047	3333 0.067	2449 0.091	1875 0.119	1481 0.151	1200 0.186	992 0.225	833 0.268	710 0.315	612 0.365	469 0.477	370 0.603
2-1/2" x 3/16"	15P4 15P2	22.7 24.7	2.5	C D	7500 0.024	6000 0.037	500 0.054	4286 0.073	3750 0.095	3333 0.121	3000 0.149	2727 0.180	2500 0.215	2308 0.252	2143 0.292	1875 0.381	1667 0.483

15W4 & 15P4 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

1/8" Bar

1-1/16"

2-15/16"

3-7/8"

4-13/16"

5-3/4"

6-11/16"

7-5/8"

8-9/16"

9-1/2"

10-7/16"

11-3/8"

12-5/16"

13-1/4"

14-3/16"

3/16" Bar

1-1/8"

2-1/16"

3-15/16"

4-7/8"

5-13/16"

6-3/4"

7-11/16"

8-5/8"

9-9/16"

10-1/2"

11-7/16"

12-3/8"

13-5/16"

14-1/4"

No. of Bars

1/8" Bar

15-1/8"

16-1/16"

17"

17-15/16"

18-7/8"

19-13/16"

20-3/4"

21-11/16"

22-5/8"

23-9/16"

24-1/2"

25-7/16"

26-3/8"

27-5/16"

28-1/4"

3/16" Bar

15-3/16"

16-1/8"

17-1/16"

18"

18-15/16"

19-7/8"

20-13/16"

21-3/4"

22-11/16"

23-5/8"

24-9/16"

25-1/2"

26-7/16"

27-3/8"

28-5/16"

No. of Bars

1/8" Bar

29-3/16"

30-1/8"

31-1/16"

32"

32-15/16"

33-7/8"

34-13/16"

35-3/4"

3/16" Bar

29-1/4"

30-3/16"

31-1/8"

32-1/16"

33"

33-15/16"

34-7/8"

35-13/16"

Merger Metals

Bar Grating Supplier and Fabrication

15W4 15P4 15W2 15P2