Bar Grating

OPEN STEEL FLOOR GRATING

Smooth-surface grating Serrated-surface grating

GRATING AVAILABLE IN CARBON , STEEL , ALUMINUM & STAINLESS

Standard Mesh Types and Close Mesh Types

Bearing Bars	WEIGHT IN LBS. PER SQ. FT.
Bearing Bars	Type 19-W-4	Type 19-W-2	Type 15-W-4	Type 15-W-2
3/4 x 1/8	4	4.6	4.8	5.5
3/4 x 3/16	5.6	6.3	6.9	7.5
1 x 1/8	5.1	5.7	6.2	6.9
1 x 3/16	7.3	8	9	9.6
1 1/4 x 1/8	6.1	6.8	7.5	8.2
1 1/4 x 3/16	8.9	9.6	11.1	11.7
1 1/2 x 1/8	7.3	7.9	9	9.6
1 1/2 x 3/16	10.6	11.2	13.1	13.8
1 3/4 x 3/16	12.2	12.9	15.2	15.8
2 x 3/16	13.9	14.5	17.3	17.9
2 1/4 x 3/16	15.4	16.1	19.2	19.9
2 1/2 x 3/16	17.1	17.7	21.3	22.0

Other Sizes Cut To Your Specifications
When ordering GRATING, specify:
Type of GRATING
Size of BEARING BARS (DEPTH & WIDTH)
Span (direction of bearing bars)
Dimensions of area
Painted or Galvanized, Smooth or Serrated

WELDED BAR GRATING

Standard	Serrated

STAIRTREADS

Stairtreads come complete with a carrier plate each end and checker plate nosing to ensure maximum visibility.

END PLATE DETAIL

Sec_12_barsx_Safety_and_Fiberglass_Grating_Page_05_img_04

Tread Width	Number of Bearing Bars	“A” Dimension
6 3/16"	5	2 1/2"
7 3/8"	6	4 1/2"
8 9/16"	7	4 1/2"
9 3/4"	8	7"
10 15/16"	9	7"
12 1/8"	10	7"

RECOMMENDED BEARING BAR SIZES

Maximum Length of Tread	Bearing Bars Size
2'2"	3/4" x 3/16"
3'0"	1" x 3/16"
4'0"	1 1/4" x 3/16"
5'3"	1 1/2" x 3/16"

TYPICAL STAIR STRINGER DETAIL

BAR GRATING

W19-4

Stock mat – nominal 3’0″ x 24’0″

Bearing Bars 1/16″ centres

4″ centres twisted cross bars

IMPERIAL TABLE OF SAFE LOADS

U – Safe Uniform Load, in lbs. per sq.ft.
C – Safe Concentrated Load in lbs. per foot of grating width.
D – Deflection in inches.
Loads and deflections given in this table are theoretical and are based on a maximum allowable fibre stress of 18,000 P.S.I.

NOTE: Spans and loads to the right of the heavy line exceed a deflection of 1/4″ for uniform loads of 100 pounds per square foot. Experience has shown that 1/4″ deflection is the maximum deflection for perestrian comfort, but can be exceeded for other types of loads at the discretion of the engineer.
For serrated-surface, increase depth by one size.

Size of Bearing Bar		Approx. Weight per Square Foot		2'-0"		2'-6"	3'-0"	3'-6"	4'-0"	4'-6"	5'-0"	5'-6"	6'-0"
3/4" x 1/8"	3.93	U–	386–0.076	247–0.119	172–0.173	126–0.234	96–0.308	76–0.389
3/4" x 1/8"	3.93	U	386	247	172	126	96	76
3/4" x 1/8"	3.93	D	0.095	0.151	0.216	0.295	0.374	0.486
3/4" x 1/8"	3.93	C	386	308	258	220	194	171
3/4" x 1/8"	3.93	D	0.076	0.119	0.173	0.234	0.308	0.389
3/4" x 3/16"	5.58	U–	578–0.076	370–0.119	258–0.173	188–0.234	144–0.308	115–0.389
3/4" x 3/16"	5.58	U	578	370	258	188	144	115
3/4" x 3/16"	5.58	D	0.095	0.151	0.216	0.295	0.374	0.486
3/4" x 3/16"	5.58	C	578	462	386	331	289	257
3/4" x 3/16"	5.58	D	0.076	0.119	0.173	0.234	0.308	0.389
1" x 1/8"	5.03	U–	686–0.057	439–0.09	304–0.129	224–0.176	171–0.231	135–0.293	190–0.36	91–0.434	76–0.518
1" x 1/8"	5.03	U	686	439	304	224	171	135	190	91	76
1" x 1/8"	5.03	D	0.072	0.111	0.159	0.219	0.288	0.366	0.451	0.547	0.673
1" x 1/8"	5.03	C	686	549	457	392	343	305	275	250	228
1" x 1/8"	5.03	D	0.057	0.09	0.129	0.176	0.231	0.293	0.36	0.434	0.518
1" x 3/16"	7.23	U–	1029–0.057	659–0.09	459–0.129	338–0.176	257–0.231	203–0.293	164–0.36	135–0.434	114–0.518
1" x 3/16"	7.23	U	1029	659	459	338	257	203	164	135	114
1" x 3/16"	7.23	D	0.072	0.111	0.159	0.219	0.288	0.366	0.451	0.434	0.673
1" x 3/16"	7.23	C	1029	824	686	587	514	458	412	135	343
1" x 3/16"	7.23	D	0.057	0.09	0.129	0.176	0.231	0.293	0.36	0.434	0.518
1 1/4" x 1/8"	6.12	U–	1072–0.046	686–0.072	476–0.104	350–0.141	268–0.183	212–0.233	172–0.288	142–0.349	119–0.416	101–0.487	87–0.565
1 1/4" x 1/8"	6.12	U	1072	686	476	350	268	212	172	142	119	101	87
1 1/4" x 1/8"	6.12	D	0.057	0.09	0.129	0.176	0.231	0.291	0.358	0.433	0.52	0.608	0.704
1 1/4" x 1/8"	6.12	C	1072	858	716	613	536	477	430	390	358	330	306
1 1/4" x 1/8"	6.12	D	0.046	0.072	0.104	0.141	0.183	0.233	0.288	0.349	0.416	0.487	0.565
1 1/4" x 3/16"	8.87	U–	1608–0.046	1028–0.072	716–0.104	526–0.141	403–0.183	318–0.233	258–0.288	213–0.349	179–0.416	152–0.487	131–0.565
1 1/4" x 3/16"	8.87	U	1608	1028	716	526	403	318	258	213	179	152	131
1 1/4" x 3/16"	8.87	D	0.057	0.09	0.129	0.176	0.231	0.291	0.358	0.433	0.52	0.608	0.704
1 1/4" x 3/16"	8.87	C	1608	1285	1073	918	803	716	644	585	536	495	459
1 1/4" x 3/16"	8.87	D	0.046	0.072	0.104	0.141	0.183	0.233	0.288	0.349	0.416	0.487	0.565
1 1/2" x 1/8"	7.23	U–	1544–0.038	987–0.059	686–0.087	505–0.117	387–0.154	306–0.195	248–0.241	205–0.289	172–0.347	149–0.406	128–0.47
1 1/2" x 1/8"	7.23	U	1544	987	686	505	387	306	248	205	172	149	128
1 1/2" x 1/8"	7.23	D	0.047	0.075	0.106	0.147	0.192	0.243	0.3	0.365	0.433	0.506	0.587
1 1/2" x 1/8"	7.23	C	1544	1235	1029	883	772	687	619	563	515	475	441
1 1/2" x 1/8"	7.23	D	0.038	0.059	0.087	0.117	0.154	0.195	0.241	0.289	0.347	0.406	0.47
1 1/2" x 3/16"	10.51	U–	2321–0.038	1485–0.059	1031–0.087	758–0.117	581–0.154	458–0.195	371–0.241	307–0.289	260–0.347	222–0.406	191–0.47
1 1/2" x 3/16"	10.51	U	2321	1485	1031	758	581	458	371	307	260	222	191
1 1/2" x 3/16"	10.51	D	0.047	0.075	0.106	0.147	0.192	0.243	0.3	0.365	0.433	0.506	0.587
1 1/2" x 3/16"	10.51	C	2321	1856	1547	1325	1159	1031	928	844	773	714	663
1 1/2" x 3/16"	10.51	D	0.038	0.059	0.087	0.117	0.154	0.195	0.241	0.289	0.347	0.406	0.47
1 3/4" x 3/16"	12.17	U–	3151–0.033	2016–0.052	1401–0.074	1029–0.101	788–0.132	622–0.167	505–0.206	416–0.249	351–0.297	299–0.347	259–0.403
1 3/4" x 3/16"	12.17	U	3151	2016	1401	1029	788	622	505	416	351	299	259
1 3/4" x 3/16"	12.17	D	0.042	0.064	0.092	0.126	0.165	0.208	0.258	0.31	0.371	0.435	0.506
1 3/4" x 3/16"	12.17	C	3151	2521	2100	1800	1575	1400	1260	1145	1049	969	899
1 3/4" x 3/16"	12.17	D	0.033	0.052	0.074	0.101	0.132	0.167	0.206	0.249	0.297	0.347	0.403
2" x 3/16"	13.81	U–	4116–0.029	2633–0.045	1829–0.064	1344–0.088	1029–0.115	813–0.145	659–0.18	546–0.217	460–0.259	393–0.303	339–0.353
2" x 3/16"	13.81	U	4116	2633	1829	1344	1029	813	659	546	460	393	339
2" x 3/16"	13.81	D	0.036	0.056	0.081	0.111	0.144	0.183	0.226	0.273	0.325	0.384	0.447
2" x 3/16"	13.81	C	4116	3292	2745	2351	2058	1828	1646	1496	1370	1266	1175
2" x 3/16"	13.81	D	0.029	0.045	0.064	0.088	0.115	0.145	0.18	0.217	0.259	0.303	0.353
2 1/4" x 3/16"	15.45	U–	5209–0.026	3332–0.039	2314–0.057	1670–0.079	1302–0.102	1028–0.129	835–0.16	689–0.194	583–0.23	496–0.27	428–0.314
2 1/4" x 3/16"	15.45	U	5209	3332	2314	1670	1302	1028	835	689	583	496	428
2 1/4" x 3/16"	15.45	D	0.032	0.05	0.072	0.098	0.127	0.162	0.199	0.241	0.287	0.338	0.393
2 1/4" x 3/16"	15.45	C	5209	4167	3473	2916	2604	2314	2082	1892	1733	1601	1487
2 1/4" x 3/16"	15.45	D	0.026	0.039	0.057	0.079	0.102	0.129	0.16	0.194	0.23	0.27	0.314
2 1/2" x 3/16"	17.11	U–	6432–0.023	4115–0.036	2858–0.051	2099–0.071	1609–0.092	1291–0.116	1029–0.144	850–0.173	720–0.207	613–0.242	529–0.282
2 1/2" x 3/16"	17.11	U	6432	4115	2858	2099	1609	1291	1029	850	720	613	529
2 1/2" x 3/16"	17.11	D	0.028	0.044	0.064	0.088	0.116	0.145	0.18	0.217	0.26	0.305	0.354
2 1/2" x 3/16"	17.11	C	6432	5147	4286	3673	3214	2858	2571	2338	2141	1977	1836
2 1/2" x 3/16"	17.11	D	0.023	0.036	0.051	0.071	0.092	0.116	0.144	0.173	0.207	0.242	0.282

Bearing bars 30mm centres

102 mm centres twisted cross bars

METRIC TABLE OF SAFE LOADS
W102-30

Stock mat – nominal 915 mm x 7315 mm
U – Safe Uniform Load, in KN per metre of width.
C – Safe Concentrated Load in lbs. per foot of grating width.
D – Deflection in mm.

Loads and deflections given in this table are theoretical and are based on a maximum allowable fibre stress of 124.0 Mpa

NOTE: Spans and loads to the right of the heavy line exceed a deflection of 1/4″ for uniform loads of 100 pounds per square foot. Experience has shown that 1/4″ deflection is the maximum deflection for pedestrian comfort, but can be exceeded for other types of loads at the discretion of the engineer.
For serrated surface, increase depth by one size.

SPAN IN MILLIMETRES

Size of Bearing Bar		Approximate Weight per Kg/m2		610		762	915	1067	1219	1372	1524	1676	1829
19 x 3.2	19.2	U–	18.5–1.9	11.84–3	8.24–4.4	6.04–5.9	4.6–7.8	3.64–9.9
19 x 3.2	19.2	U	18.5	11.84	8.24	6.04	4.6	3.64
19 x 3.2	19.2	D	2.4	3.8	5.5	7.5	9.5	12.3
19 x 3.2	19.2	C	5.63	4.49	3.77	3.21	2.83	2.5
19 x 3.2	19.2	D	1.9	3	4.4	5.9	7.8	9.9
19 x 4.8	27.2	U–	27.7–1.9	17.73–3	12.36–4.4	9–5.9	6.9–7.8	5.51–9.9
19 x 4.8	27.2	U	27.7	17.73	12.36	9	6.9	5.51
19 x 4.8	27.2	D	2.4	3.8	5.5	7.5	9.5	12.3
19 x 4.8	27.2	C	8.44	6.74	5.63	4.83	4.22	3.75
19 x 4.8	27.2	D	1.9	3	4.4	5.9	7.8	9.9
25 x 3.2	24.6	U–	32.87–1.4	21.04–2.3	14.57–3.3	10.73–4.5	8.19–5.9	6.47–7.4	5.22–9.1	4.36–11	3.64–13.2
25 x 3.2	24.6	U	32.87	21.04	14.57	10.73	8.19	6.47	5.22	4.36	3.64
25 x 3.2	24.6	D	1.8	2.8	4	5.6	7.3	9.3	11.5	13.9	17.1
25 x 3.2	24.6	C	10.01	8.01	6.67	5.72	5.01	4.45	4.01	3.65	3.33
25 x 3.2	24.6	D	1.4	2.3	3.3	4.5	5.9	7.4	9.1	11	13.2
25 x 4.8	35.3	U–	49.31–1.4	31.58–2.3	21.99–3.3	16.2–4.5	12.31–5.9	9.73–7.4	7.86–9.1	6.47–11	5.46–13.2
25 x 4.8	35.3	U	49.31	31.58	21.99	16.2	12.31	9.73	7.86	6.47	5.46
25 x 4.8	35.3	D	1.8	2.8	4	5.6	7.3	9.3	11.5	13.9	17.1
25 x 4.8	35.3	C	15.02	12.03	10.01	8.57	7.5	6.68	6.01	5.47	5.01
25 x 4.8	35.3	D	1.4	2.3	3.3	4.5	5.9	7.4	9.1	11	13.2
32 x 3.2	29.9	U–	51.37–1.2	32.87–1.8	22.81–2.6	16.77–3.6	12.84–4.6	10.16–5.9	8.24–7.3	6.8–8.9	5.7–10.6	4.84–12.4	4.17–14.4
32 x 3.2	29.9	U	51.37	32.87	22.81	16.77	12.84	10.16	8.24	6.8	5.7	4.84	4.17
32 x 3.2	29.9	D	1.4	2.3	3.3	4.5	5.9	7.4	9.1	11	13.2	15.4	17.9
32 x 3.2	29.9	C	15.64	12.52	10.45	8.95	7.82	6.96	6.28	5.69	5.22	4.82	4.47
32 x 3.2	29.9	D	1.2	1.8	2.6	3.6	4.6	5.9	7.3	8.9	10.6	12.4	14.4
32 x 4.8	43.3	U–	77.05–1.2	49.26–1.8	34.31–2.6	25.2–3.6	19.31–4.6	15.24–5.9	12.36–7.3	10.21–8.9	8.58–10.6	7.28–12.4	6.28–14.4
32 x 4.8	43.3	U	77.05	49.26	34.31	25.2	19.31	15.24	12.36	10.21	8.58	7.28	6.28
32 x 4.8	43.3	D	1.4	2.3	3.3	4.5	5.9	7.4	9.1	11	13.2	15.4	17.9
32 x 4.8	43.3	C	23.47	18.75	15.66	13.4	11.72	10.45	9.4	8.54	7.82	7.22	6.7
32 x 4.8	43.3	D	1.2	1.8	2.6	3.6	4.6	5.9	7.3	8.9	10.6	12.4	14.4
38 x 3.2	35.3	U–	73.98–1	47.29–1.5	32.87–2.2	24.2–3	18.54–3.9	14.66–5	11.88–6.1	9.82–7.3	8.24–8.8	7.14–10.3	6.13–11.9
38 x 3.2	35.3	U	73.98	47.29	32.87	24.2	18.54	14.66	11.88	9.82	8.24	7.14	6.13
38 x 3.2	35.3	D	1.2	1.9	2.7	3.7	4.9	6.2	7.6	9.3	11	12.9	14.9
38 x 3.2	35.3	C	22.54	18.02	15.02	12.89	11.27	10.03	9.03	8.22	7.52	6.93	6.44
38 x 3.2	35.3	D	1	1.5	2.2	3	3.9	5	6.1	7.3	8.8	10.3	11.9
38 x 4.8	51.3	U–	111.2–1	71.16–1.5	49.4–2.2	36.32–3	27.84–3.9	21.95–5	17.78–6.1	14.71–7.3	12.46–8.8	10.64–10.3	9.15–11.9
38 x 4.8	51.3	U	111.2	71.16	49.4	36.32	27.84	21.95	17.78	14.71	12.46	10.64	9.15
38 x 4.8	51.3	D	1.2	1.9	2.7	3.7	4.9	6.2	7.6	9.3	11	12.9	14.9
38 x 4.8	51.3	C	33.87	27.09	22.58	19.34	16.91	15.05	13.54	12.32	11.28	10.42	9.68
38 x 4.8	51.3	D	1	1.5	2.2	3	3.9	5	6.1	7.3	8.8	10.3	11.9
45 x 4.8	59.4	U–	151–0.8	96.6–1.3	67.13–1.9	49.31–2.6	37.76–3.4	29.8–4.2	24.2–5.2	19.93–6.3	16.82–7.5	14.33–8.8	12.41–10.2
45 x 4.8	59.4	U	151	96.6	67.13	49.31	37.76	29.8	24.2	19.93	16.82	14.33	12.41
45 x 4.8	59.4	D	1.1	1.6	2.3	3.2	4.2	5.3	6.6	7.9	9.4	11	12.9
45 x 4.8	59.4	C	45.99	36.79	30.65	26.27	22.99	20.43	18.39	16.71	15.31	14.14	13.12
45 x 4.8	59.4	D	0.8	1.3	1.9	2.6	3.4	4.2	5.2	6.3	7.5	8.8	10.2
51 x 4.8	67.4	U–	197.2–0.7	126.2–1.1	87.64–1.6	64.4–2.2	49.31–2.9	38.96–3.7	31.58–4.6	26.16–5.5	22.04–6.6	18.83–7.7	16.24–9
51 x 4.8	67.4	U	197.2	126.2	87.64	64.4	49.31	38.96	31.58	26.16	22.04	18.83	16.24
51 x 4.8	67.4	D	0.9	1.4	2.1	2.8	3.7	4.6	5.7	6.9	8.3	9.8	7.15
51 x 4.8	67.4	C	60.07	48.04	40.06	34.31	30.03	26.68	24.02	21.83	19.99	18.48	11.41
51 x 4.8	67.4	D	0.7	1.1	1.6	2.2	2.9	3.7	4.6	5.5	6.6	7.7	9
57 x 4.8	75.4	U–	249.6–0.7	159.7–1	110.9–1.4	80.02–2	62.39–2.6	49.26–3.3	40.01–4.1	33.01–4.9	27.94–5.8	23.77–6.9	20.51–8
57 x 4.8	75.4	U	249.6	159.7	110.9	80.02	62.39	49.26	40.01	33.01	27.94	23.77	20.51
57 x 4.8	75.4	D	0.8	1.3	1.8	2.5	3.2	4.1	5.1	6.1	7.3	8.6	10
57 x 4.8	75.4	C	76.02	60.81	50.68	42.56	38	33.77	30.38	27.61	25.29	23.36	21.7
57 x 4.8	75.4	D	0.7	1	1.4	2	2.6	3.3	4.1	4.9	5.8	6.9	8
64 x 4.8	83.5	U–	308.2–0.6	197.2–0.9	137–1.3	100.6–1.8	77.1–2.3	61.86–2.9	49.31–3.7	40.73–4.4	34.5–5.3	29.37–6.1	25.35–7.2
64 x 4.8	83.5	U	308.2	197.2	137	100.6	77.1	61.86	49.31	40.73	34.5	29.37	25.35
64 x 4.8	83.5	D	0.7	1.1	1.6	2.2	2.9	3.7	4.6	5.5	6.6	7.7	9
64 x 4.8	83.5	C	93.87	75.11	62.55	53.6	46.9	41.71	37.52	34.12	31.24	28.85	26.79
64 x 4.8	83.5	D	0.6	0.9	1.3	1.8	2.3	2.9	3.7	4.4	5.3	6.1	7.2

NOTE: 1 KPa = 101.89 Kg/m2

WELDED BAR GRATING

CLEARANCES

LENGTH OR SPAN

WIDTH

The overall dimension of a flooring panel measured at right angles to the load bearing bars. This dimension is always referred to as “”width””, even if it exceeds the length. (Standard widths are multiples of BearingBar Centres plus Bearing Bar Width).

INSTALLATION

Saddle Clip Complete Assembly – consists of saddle

The overall dimension of a flooring panel is measured at right angles to the load bearing bars. This dimension is always referred to as “”width””, even if it exceeds the length. (Standard widths are multiples of Bearing Bar Centres plus Bearing Bar Width).

Saddle Clip Complete Assembly – consists of saddle clip, 5/16″ bolt, nut and bottom plate.

Field Welding – the most positive means of fastening grating to supporting members

Saddle Clip Bottom Plate supplied with 5/16″ bolt

Saddle Clip – for removable panels

Number of Bars	2	3	4	5	6	7	8	9	10	11
Standard W-19	1 3/8"	2 9/16"	3 3/4"	4 15/16"	6 1/8"	7 5/16"	8 1/2"	9 3/4"	10 7/8"	12 1/16"
Number of Bars	12	13	14	15	16	17	18	19	20	21
Standard W-19	13 1/4"	14 7/16"	15 5/8"	16 13/16"	18"	19 3/16"	20 3/8"	21 9/16"	22 3/4"	23 15/16"
Number of Bars	22	23	24	25	26	27	28	29	30	31
Standard W-19	25 1/8"	26 5/16"	27 1/2"	28 11/16"	29 7/8"	31 1/16"	32 1/4"	33 7/16"	34 5/8"	35 13/16"

OPEN STEEL FLOOR GRATING

​Smooth-surface grating Serrated-surface grating​

Smooth-surface grating Serrated-surface grating