I 30-60 – I Bearing Bar

3" Thick | 60% Open

Special Order

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I 30-60 – I 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	0.011	34635	6.85
18	<0.001	0.001	0.002	0.002	0.003	0.005	0.010	0.021	23090	11.68
24	<0.001	0.002	0.003	0.003	0.004	0.009	0.017	0.035	17318	16.68
30	0.001	0.003	0.004	0.005	0.007	0.014	0.027	0.054	13854	20.78
36	0.002	0.004	0.006	0.008	0.010	0.019	0.039	0.077	11545	25.24
42	0.003	0.005	0.008	0.010	0.013	0.026	0.052	0.105	9896	29.42
48	0.004	0.007	0.011	0.014	0.018	0.035	0.070	0.141	8659	32.70
54	0.005	0.009	0.014	0.019	0.023	0.047	0.094	0.187	7697	35.00
60	0.006	0.012	0.019	0.025	0.031	0.062	0.124	0.248	6927	36.30
66	0.008	0.016	0.024	0.032	0.040	0.080	0.160	0.320	6297	37.40
72	0.010	0.020	0.030	0.041	0.051	0.102	0.203	0.406	5773	38.30

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	0.003	0.007	44333	6.85
18	<0.001	0.001	0.001	0.002	0.002	0.005	0.010	0.020	19703	11.68
24	0.001	0.002	0.003	0.004	0.005	0.011	0.022	0.043	11083	16.68
30	0.002	0.004	0.006	0.008	0.011	0.021	0.042	0.085	7093	20.78
36	0.004	0.007	0.011	0.014	0.018	0.036	0.072	0.144	4926	25.24
42	0.006	0.011	0.017	0.023	0.029	0.057	0.115	0.230	3619	29.42
48	0.009	0.018	0.026	0.035	0.044	0.088	0.176	0.352	2771	32.70
54	0.013	0.026	0.040	0.053	0.066	0.132	0.264	0.527	2189	35.00
60	0.019	0.039	0.058	0.077	0.097	0.194	0.387		1773	36.30
66	0.028	0.055	0.083	0.110	0.138	0.275	0.551		1466	37.40
72	0.038	0.076	0.114	0.152	0.190	0.381			1231	38.30

Properties Per Foot of Width	# of Bars	Load Bar Depth	Bar Centers	Weight/sq ft
A = 9.63 in² I = 9.18 in⁴ S = 6.12 in³	8	3″	1.5″	8.40

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.