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Heavy Duty Pultruded Grating – HD 25-50 – HD Bearing Bar

2 1/2" Thick | 50% Open

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Heavy Duty Pultruded Grating – HD 25-50 – 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	0.001	0.003	0.006	0.012	59525	6.02
18	<0.001	0.001	0.002	0.002	0.003	0.005	0.010	0.020	39683	12.03
24	<0.001	0.002	0.002	0.003	0.004	0.008	0.016	0.032	29763	18.20
30	0.001	0.002	0.003	0.005	0.006	0.011	0.023	0.046	23810	24.50
36	0.002	0.003	0.005	0.007	0.008	0.017	0.034	0.068	19842	28.80
42	0.002	0.005	0.007	0.010	0.012	0.025	0.049	0.099	17007	31.20
48	0.003	0.007	0.010	0.014	0.017	0.035	0.070	0.139	14881	33.10
54	0.005	0.010	0.014	0.019	0.024	0.048	0.095	0.190	13228	34.50
60	0.006	0.013	0.019	0.026	0.032	0.064	0.128	0.256	11905	35.10
66	0.008	0.017	0.025	0.034	0.042	0.084	0.168	0.336	10823	35.60
72	0.011	0.022	0.033	0.043	0.054	0.109	0.217	0.434	9921	35.80
78	0.014	0.027	0.041	0.055	0.069	0.137	0.275	0.549	9158	36.00
84	0.017	0.034	0.051	0.068	0.085	0.171	0.341	0.682	8504	36.20
90	0.021	0.042	0.063	0.083	0.104	0.209	0.417		7937	36.40
96	0.025	0.050	0.076	0.101	0.126	0.252	0.504		7441	36.60
102	0.030	0.060	0.090	0.120	0.150	0.300	0.601		7003	36.80

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	0.007	30480	6.02
18	<0.001	0.001	0.001	0.002	0.002	0.005	0.009	0.019	20320	12.03
24	0.001	0.002	0.003	0.004	0.005	0.010	0.020	0.040	15240	18.20
30	0.002	0.004	0.005	0.007	0.009	0.018	0.036	0.072	12192	24.50
36	0.003	0.006	0.009	0.013	0.016	0.032	0.063	0.127	8466	28.80
42	0.005	0.011	0.016	0.022	0.027	0.054	0.108	0.216	6220	31.20
48	0.009	0.017	0.026	0.035	0.044	0.087	0.174	0.348	4762	33.10
54	0.013	0.027	0.040	0.053	0.067	0.134	0.267	0.535	3763	34.50
60	0.020	0.040	0.060	0.080	0.100	0.200	0.401		3048	35.10
66	0.029	0.058	0.087	0.116	0.145	0.289	0.578		2519	35.60
72	0.041	0.081	0.122	0.163	0.204	0.407			2117	35.80
78	0.056	0.112	0.167	0.223	0.279	0.558			1803	36.00
84	0.075	0.149	0.224	0.298	0.373				1555	36.20
90	0.098	0.196	0.293	0.391	0.489				1355	36.40
96	0.126	0.252	0.378	0.504	0.629				1191	36.60
102	0.160	0.319	0.479	0.638					1055	36.80

Properties Per Foot of Width	# of Bars	Load Bar Depth	Bar Centers	Weight/sq ft
A = 15.0 in² I = 7.81 in⁴ S = 6.25 in³	10	2.5″	1.2″	12.14

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.