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Heavy Duty Pultruded Grating – HD 20-50 – HD Bearing Bar

2" Thick | 50% Open

Special Order

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Heavy Duty Pultruded Grating – HD 20-50 – HD Bearing Bar

NOTE: These products are only available by special order. Minimum orders, extended lead times and special-order pricing will apply.

Span (inches)	CONCENTRATED LOAD in lb/ft of width								Max Load (lb/ft)	Apparent EI x 10⁶ (lb-in²)
Span (inches)	50	100	150	200	250	500	1000	2000	Max Load (lb/ft)	Apparent EI x 10⁶ (lb-in²)
12	<0.001	<0.001	0.001	0.001	0.002	0.004	0.007	0.014	43449	5.14
18	<0.001	0.001	0.002	0.003	0.003	0.007	0.013	0.027	28966	9.10
24	0.001	0.002	0.003	0.004	0.006	0.011	0.022	0.045	21725	12.90
30	0.002	0.003	0.005	0.007	0.009	0.017	0.035	0.069	17380	16.20
36	0.003	0.005	0.008	0.010	0.013	0.026	0.052	0.103	14483	18.83
42	0.004	0.008	0.012	0.015	0.019	0.038	0.077	0.154	12414	20.10
48	0.006	0.011	0.017	0.022	0.028	0.056	0.111	0.223	10862	20.67
54	0.008	0.016	0.024	0.032	0.039	0.079	0.158	0.315	9655	20.80
60	0.011	0.021	0.032	0.043	0.054	0.107	0.214	0.428	8690	21.02
66	0.014	0.028	0.043	0.057	0.071	0.142	0.284	0.569	7900	21.06
72	0.018	0.037	0.055	0.074	0.092	0.184	0.368		7142	21.12
78	0.023	0.047	0.070	0.093	0.117	0.233	0.466		6684	21.20
84	0.029	0.058	0.087	0.116	0.145	0.290	0.580		6207	21.30

Span (inches)	UNIFORM LOAD in lb/ft²								Max Load (lb/ft²)	Apparent EI x 10⁶ (lb-in²)
Span (inches)	50	100	150	200	250	500	1000	2000	Max Load (lb/ft²)	Apparent EI x 10⁶ (lb-in²)
12	<0.001	<0.001	<0.001	<0.001	0.001	0.002	0.004	0.009	22248	5.14
18	<0.001	0.001	0.002	0.003	0.003	0.006	0.013	0.025	14832	9.10
24	0.001	0.003	0.004	0.006	0.007	0.014	0.028	0.056	11124	12.90
30	0.003	0.005	0.008	0.011	0.014	0.027	0.054	0.109	8899	16.20
36	0.005	0.010	0.015	0.019	0.024	0.048	0.097	0.194	6180	18.83
42	0.008	0.017	0.025	0.034	0.042	0.084	0.168	0.336	4540	20.10
48	0.014	0.028	0.042	0.056	0.070	0.139	0.279	0.557	3476	20.67
54	0.022	0.044	0.067	0.089	0.111	0.222	0.444		2747	20.80
60	0.033	0.067	0.100	0.134	0.167	0.334	0.669		2225	21.02
66	0.049	0.098	0.147	0.196	0.244	0.489			1839	21.06
72	0.069	0.138	0.207	0.276	0.345	0.690			1545	21.12
78	0.095	0.189	0.284	0.379	0.474				1316	21.20
84	0.127	0.254	0.380	0.507	0.634				1135	21.30

Properties Per Foot of Width	# of Bars	Load Bar Depth	Bar Centers	Weight/sq ft
A = 12.0 in² I = 4.00 in⁴ S = 4.00 in³	10	2″	1.2″	9.92

1. Tables were developed in accordance with the test method developed by the Fiberglass Grating Manufacturers Council (FGMC) of the American Composites Manufacturers Association (ACMA) for the Fiberglass Grating Standard.

2. The designer should not exceed MAXIMUM RECOMMENDED load at any time. ULTIMATE CAPACITY represents MAX LOAD observed at initial fracture.

3. Walking loads for maintenance traffic are typically a live load of 50 PSF. Deflections for worker comfort are typically limited to 0.375″ (3⁄8″) or SPAN divided by 120 under full live load. For a firmer feel under full live load or a line load 250 lb/ft of width, limit deflections to 0.25″ (1/4″) or SPAN divided by 200.

4. The loads represented are for STATIC LOAD CONDITIONS at ambient temperature. Deflections for impact loads or dynamic loads will MULTIPLY the deflections shown by 2. Long term loads will result in added deflection due to creep in the material and will require higher factors of safety to ensure acceptable performance.

5. Deflections are limited to 0.5″ (1/2″) as recommended by the Fiberglass Grating Manufacturers Council of the American Composites Manufacturers Association.