I 30-60 – I Bearing Bar PROGrate Pultruded Grating

3" Thick | 60% Open
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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)

50

100

150

200

250

500

1000

2000

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)

50

100

150

200

250

500

1000

2000

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.