Griglia in acciaio rivettata

Riveted grating is one of the steel grating products featuring high load capacity, flexibility, acid and alkali resistance, and a slip-resistant surface.
It utilizes high-strength rivets to fuse the reticulated bars and bearing bars together, forming solid joints.
It can be constructed from carbon steel, stainless steel, or aluminum.
Furthermore, it is available with both smooth and serrated surfaces. Riveted steel grating is widely applicable as stair treads, walkways, flooring, covers, and bridge decking.

Categories Griglia in acciaio rivettata, Griglia in acciaio

Description

How to Make Riveted Steel Grating?

First, arrange the cut flat steel and cross bars according to the spacing required by the design, then use a rivet gun or other riveting equipment to pass the rivets through the connecting holes of the flat steel and the crossbar, and deform the rivets by squeezing or hammering, so that the flat steel and the crossbar are firmly connected together.

Riveted gratings are available in carbon steel, 6000 series aluminum, and 300 series stainless steel. These products are manufactured with bearing bars spaced 1-1/8” or 3/4” apart, with standard rivet spacing of 7” on center. Optional close rivet spacing of 3-1/2” on center is also available.

Standard serrations consist of the teeth of the grating bar being raised slightly above the top plane of the bearing bar during assembly. Alternatively, the user may specify 100% serrations, where both the bearing bar and cross member are provided with serrations.

Specifications of Riveted Grating

Material: carbon steel, 6000 series aluminum, and 300 series stainless steels
Category: It can be divided into light duty and heavy duty riveted gratings by load bearing capacity.
Surface treatment: galvanized, painted or mill finished.
Surface type: smooth surface or serrated surface.
Standard: conform to ANSI/NAAMM STANDARD MBG 531.
Spacing Available: These products are manufactured with bearing bars spaced either 1-1/8″ or 3/4″ apart and the standard rivet spacing is 7″ on center.Optional close rivet spacing of 3-1/2″ on center is also available.

Table 1: 18-R-7/3.5 (1-1/8″) Steel Load Table
Bearing Bar Size (inches)	Approx. Weight psf *	Maximum Pedestrian Span**	Load Types	Unsupported Span
Bearing Bar Size (inches)	Approx. Weight psf *	Maximum Pedestrian Span**	Load Types	2′-0	2′-6	3′-0	3′-6	4′-0	4′-6	5′-0	5′-6	6′-0	6′-6	7′-0	8′-0
3/4 × 3/16	7.8	4′-0″	U	613	392	272	200	153	121	98	All loads and deflections are theoretical and based upon the gross sections of the bearing bars, using a fiber stress of 18,000 psi.
			D	0.099	0.155	0.223	0.304	0.397	0.503	0.621	The values are not intended to be absolute since the actual load
			C	613	490	409	350	306	272	245	capacity will be affected by the slight variations in mill and manufacturing tolerances.
			D	0.079	0.124	0.179	0.243	0.318	0.402	0.497	Grating for spans to the left of the heavy line have a deflection ≤ 1/4″ for uniform loads of 100 psf.
1 × 1/8	7.6	4′-5″	U	726	465	323	237	182	144	116
			D	0.074	0.116	0.168	0.228	0.298	0.377	0.466
			C	726	581	484	415	363	323	291
			D	0.06	0.093	0.134	0.182	0.238	0.302	0.372
1 × 3/16	9.4	4′-11″	U	1090	697	484	356	272	215	174	144	U – uniform load in pounds/sq. ft.
			D	0.074	0.116	0.168	0.228	0.298	0.377	0.466	0.563	C – concentrated load in pounds/ft. of grating width
			C	1090	872	726	623	545	484	436	396	D – deflection in inches
			D	0.06	0.093	0.134	0.182	0.238	0.302	0.372	0.451
1-1/4 × 1/8	8.7	5′-3″	U	1135	726	504	371	284	224	182	150	126	/	/	/
			D	0.06	0.093	0.134	0.182	0.238	0.302	0.372	0.451	0.536	/	/	/
			C	1135	908	757	649	567	504	454	413	378	/	/	/
			D	0.048	0.074	0.107	0.146	0.191	0.241	0.298	0.36	0.429	/	/	/
1-1/4 × 3/16	11	5′-10″	U	1702	1090	757	556	426	336	272	225	189	161	/	/
			D	0.06	0.093	0.134	0.182	0.238	0.302	0.372	0.451	0.536	0.629	/	/
			C	1702	1362	1135	973	851	757	681	619	567	524	/	/
			D	0.048	0.074	0.107	0.146	0.191	0.241	0.298	0.36	0.429	0.504	/	/
1-1/2 × 1/8	9.9	6′-0″	U	1634	1046	726	534	409	323	262	216	182	155	133	102
			D	0.05	0.078	0.112	0.152	0.199	0.251	0.31	0.376	0.447	0.524	0.608	0.794
			C	1634	1307	1090	934	817	726	654	594	545	503	467	409
			D	0.04	0.062	0.089	0.122	0.159	0.201	0.248	0.3	0.358	0.42	0.487	0.636
1-1/2 × 3/16	12.5	6′-8″	U	2451	1569	1090	800	613	484	392	324	272	232	200	153
			D	0.05	0.078	0.112	0.152	0.199	0.251	0.31	0.376	0.447	0.524	0.608	0.794
			C	2451	1961	1634	1401	1226	1090	981	891	817	754	700	613
			D	0.04	0.062	0.089	0.122	0.159	0.201	0.248	0.3	0.358	0.42	0.487	0.636
1-3/4 × 3/16	14.2	7′-6″	U	3337	2135	1483	1090	834	659	534	441	371	316	272	209
			D	0.043	0.067	0.096	0.13	0.17	0.215	0.266	0.322	0.383	0.45	0.521	0.681
			C	3337	2669	2224	1907	1668	1483	1335	1213	1112	1027	953	834
			D	0.034	0.053	0.077	0.104	0.136	0.172	0.213	0.257	0.306	0.36	0.417	0.545
2 × 3/16	16.8	8′-3″	U	4358	2789	1937	1423	1090	861	697	576	484	413	356	272
			D	0.037	0.058	0.084	0.114	0.149	0.189	0.233	0.282	0.335	0.393	0.456	0.596
			C	4358	3486	2905	2490	2179	1937	1743	1585	1453	1341	1245	1090
			D	0.03	0.047	0.067	0.091	0.119	0.151	0.186	0.225	0.268	0.315	0.365	0.477
2-1/4 × 3/16	18.3	9′-0″	U	5515	3530	2451	1801	1379	1090	883	729	613	522	450	345
			D	0.033	0.052	0.074	0.101	0.132	0.168	0.207	0.25	0.298	0.35	0.406	0.53
			C	5515	4412	3677	3152	2758	2451	2206	2006	1839	1697	1576	1379
			D	0.026	0.041	0.06	0.081	0.106	0.134	0.166	0.2	0.238	0.28	0.324	0.424
2-1/2 × 3/16	19.9	9′-9″	U	6809	4358	3026	2223	1702	1345	1090	900	757	645	556	426
			D	0.03	0.047	0.067	0.091	0.119	0.151	0.186	0.225	0.268	0.315	0.365	0.477
			C	6809	5447	4540	3891	3405	3026	2724	2476	2270	2095	1946	1702
			D	0.024	0.037	0.054	0.073	0.095	0.121	0.149	0.18	0.215	0.252	0.292	0.381
* Weight per square foot based upon rivets spaced at 7″ on center. Add .40 psf for 3-1/2″ rivet centers.
** Maximum pedestrian load is defined as a 100# uniform load with deflection ≤ 1/4 inch. The 1/4″ maximum deflection criteria is considered consistent with pedestrian comfort, but may be exceeded for other loading conditions at the discretion of the specifying authority.

Table 2: 12-R-7/3.5 (3/4″) Steel Load Table
Bearing Bar Size (inches)	Approx. Weight psf *	Maximum Pedestrian Span**	Load Types	Unsupported Span
Bearing Bar Size (inches)	Approx. Weight psf *	Maximum Pedestrian Span**	Load Types	2′-0	2′-6	3′-0	3′-6	4′-0	4′-6	5′-0	5′-6	6′-0	6′-6	7′-0	8′-0
3/4 × 3/16	10.7	4′-4″	U	858	549	381	280	215	170	All loads and deflections are theoretical and based upon the gross sections of the bearing bars, using a fiber stress of 18,000 psi.
			D	0.099	0.155	0.223	0.304	0.397	0.503	The values are not intended to be absolute since the actual load
			C	858	686	572	490	429	381	capacity will be affected by the slight variations in mill and manufacturing tolerances.
			D	0.079	0.124	0.179	0.243	0.318	0.402	Grating for spans to the left of the heavy line have a deflection ≤ 1/4″ for uniform loads of 100 psf.
1 × 3/16	12.8	5′-4″	U	1525	976	678	498	381	301	244	202	U – uniform load in pounds/sq. ft.
			D	0.074	0.116	0.168	0.228	0.298	0.377	0.466	0.563	C – concentrated load in pounds/ft. of grating width
			C	1525	1220	1017	872	763	678	610	555	D – deflection in inches
			D	0.06	0.093	0.134	0.182	0.238	0.302	0.372	0.451
1-1/4 × 3/16	15	6′-4″	U	2383	1525	1059	778	596	471	381	315	265	/	/	/
			D	0.06	0.093	0.134	0.182	0.238	0.302	0.372	0.451	0.536	/	/	/
			C	2383	1907	1589	1362	1192	1059	953	867	794	/	/	/
			D	0.048	0.074	0.107	0.146	0.191	0.241	0.298	0.36	0.429	/	/	/
1-1/2 × 3/16	17.1	7′-3″	U	3432	2196	1525	1121	858	678	549	454	381	325	280	215
			D	0.05	0.078	0.112	0.152	0.199	0.251	0.31	0.376	0.447	0.524	0.608	0.794
			C	3432	2745	2288	1961	1716	1525	1373	1248	1144	1056	981	858
			D	0.04	0.062	0.089	0.122	0.159	0.201	0.248	0.3	0.358	0.42	0.487	0.636
1-3/4 × 3/16	19.4	8′-2″	U	4671	2989	2076	1525	1168	923	747	618	519	442	381	292
			D	0.043	0.067	0.096	0.13	0.17	0.215	0.266	0.322	0.383	0.45	0.521	0.681
			C	4671	3737	3114	2669	2336	2076	1868	1699	1557	1437	1335	1168
			D	0.034	0.053	0.077	0.104	0.136	0.172	0.213	0.257	0.306	0.36	0.417	0.545
2 × 3/16	22.9	9′-0″	U	6101	3905	2712	1992	1525	1205	976	807	678	578	498	381
			D	0.037	0.058	0.084	0.114	0.149	0.189	0.233	0.282	0.335	0.393	0.456	0.596
			C	6101	4881	4067	3486	3050	2712	2440	2219	2034	1877	1743	1525
			D	0.03	0.047	0.067	0.091	0.119	0.151	0.186	0.225	0.268	0.315	0.365	0.477
2-1/4 × 3/16	25	9′-10″	U	7721	4942	3432	2521	1930	1525	1235	1021	858	731	630	483
			D	0.033	0.052	0.074	0.101	0.132	0.168	0.207	0.25	0.298	0.35	0.406	0.53
			C	7721	6177	5148	4412	3861	3432	3089	2808	2574	2376	2206	1930
			D	0.026	0.041	0.06	0.081	0.106	0.134	0.166	0.2	0.238	0.28	0.324	0.424
2-1/2 × 3/16	27.2	10′-8″	U	9533	6101	4237	3113	2383	1883	1525	1261	1059	903	778	596
			D	0.03	0.047	0.067	0.091	0.119	0.151	0.186	0.225	0.268	0.315	0.365	0.477
			C	9533	7626	6355	5447	4766	4237	3813	3466	3178	2933	2724	2383
			D	0.024	0.037	0.054	0.073	0.095	0.121	0.149	0.18	0.215	0.252	0.292	0.381
* Weight per square foot based upon rivets spaced at 7″ on center. Add .40 psf for steel products with 3-1/2″ rivet centers.
** Maximum pedestrian load is defined as a 100# uniform load with deflection ≤ 1/4 inch. The 1/4″ maximum deflection criteria is considered consistent with pedestrian comfort, but may be exceeded for other loading conditions at the discretion of the specifying authority.