Heavy Duty Pultruded Grating – HD 20-40 – HD Bearing Bar

2" Thick | 40% Open

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Heavy Duty Pultruded Grating – HD 20-40 – 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	0.001	0.003	0.005	0.010	48090	6.92
18	<0.001	<0.001	0.001	0.002	0.002	0.005	0.009	0.019	32060	12.80
24	<0.001	0.002	0.003	0.003	0.004	0.009	0.017	0.034	24045	16.80
30	0.001	0.003	0.004	0.006	0.007	0.014	0.029	0.058	19236	19.50
36	0.002	0.005	0.007	0.009	0.011	0.023	0.045	0.090	16030	21.60
42	0.003	0.007	0.010	0.013	0.017	0.034	0.067	0.134	13740	23.00
48	0.005	0.010	0.014	0.019	0.024	0.048	0.096	0.193	12023	23.90
54	0.007	0.013	0.020	0.027	0.034	0.067	0.135	0.270	10687	24.34
60	0.009	0.018	0.027	0.036	0.046	0.091	0.182	0.365	9618	24.69
66	0.012	0.024	0.036	0.048	0.060	0.120	0.240	0.479	8744	25.00
72	0.015	0.031	0.046	0.061	0.077	0.154	0.307	0.614	8015	25.33
78	0.019	0.039	0.058	0.078	0.097	0.195	0.389		7398	25.40
84	0.024	0.048	0.072	0.096	0.121	0.241	0.482		6870	25.60

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	0.003	0.007	24623	6.92
18	<0.001	<0.001	0.001	0.002	0.002	0.004	0.009	0.018	16415	12.80
24	0.001	0.002	0.003	0.004	0.005	0.011	0.021	0.043	12311	16.80
30	0.002	0.005	0.007	0.009	0.011	0.023	0.045	0.090	9849	19.50
36	0.004	0.008	0.013	0.017	0.021	0.042	0.084	0.169	6840	21.60
42	0.007	0.015	0.022	0.029	0.037	0.073	0.147	0.294	5025	23.00
48	0.012	0.024	0.036	0.048	0.060	0.120	0.241	0.482	3847	23.90
54	0.019	0.038	0.057	0.076	0.095	0.189	0.379		3040	24.34
60	0.028	0.057	0.085	0.114	0.142	0.285	0.570		2462	24.69
66	0.041	0.082	0.124	0.165	0.206	0.412			2035	25.00
72	0.058	0.115	0.173	0.230	0.288	0.576			1710	25.33
78	0.079	0.158	0.237	0.316	0.395				1457	25.40
84	0.106	0.211	0.317	0.422	0.528				1256	25.60

Properties Per Foot of Width	# of Bars	Load Bar Depth	Bar Centers	Weight/sq ft
A = 14.4 in² I = 4.80 in⁴ S = 4.80 in³	12	2″	1″	11.81

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.