VGBA Certified – I 15-40 – I Bearing Bar PROGrate Pultruded Grating

1 1/2" Thick | 40% 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

0.002

0.002

0.003

0.006

0.012

0.024

14034

3.00

18

0.001

0.002

0.004

0.005

0.006

0.012

0.025

0.050

9356

4.88

24

0.002

0.005

0.007

0.010

0.012

0.024

0.049

0.098

7017

5.90

30

0.004

0.009

0.013

0.018

0.022

0.044

0.088

0.176

5614

6.40

36

0.007

0.015

0.022

0.029

0.036

0.073

0.146

0.292

4678

6.66

42

0.011

0.023

0.034

0.046

0.057

0.114

0.229

0.457

4010

6.75

48

0.017

0.034

0.051

0.068

0.085

0.169

0.338

0.677

3509

6.81

54

0.024

0.048

0.072

0.096

0.120

0.240

0.480

3119

6.83

60

0.033

0.066

0.099

0.131

0.164

0.328

0.657

2807

6.85

66

0.044

0.087

0.131

0.174

0.218

0.436

2552

6.87

72

0.057

0.113

0.170

0.226

0.283

0.565

2339

6.88

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

0.002

0.004

0.007

0.015

21051

3.00

18

0.001

0.002

0.004

0.005

0.006

0.012

0.023

0.047

14559

4.88

24

0.003

0.006

0.009

0.012

0.015

0.031

0.061

0.122

7136

5.90

30

0.007

0.014

0.021

0.027

0.034

0.069

0.037

0.275

4405

6.40

36

0.014

0.027

0.041

0.055

0.068

0.137

0.274

0.547

3161

6.66

42

0.025

0.050

0.075

0.100

0.125

0.250

0.500

2292

6.75

48

0.042

0.085

0.127

0.169

0.211

0.423

1746

6.81

54

0.068

0.135

0.203

0.270

0.338

0.675

1387

6.83

60

0.103

0.205

0.308

0.411

0.513

1124

6.85

66

0.150

0.300

0.450

0.599

928

6.87

72

0.212

0.424

0.636

779

6.88

Properties Per Foot of Width

# of Bars

Load Bar Depth

Bar Centers

Weight/sq ft

A = 4.66 in2 I = 1.32 in4 S = 1.76 in3

12

1.5″

1″

4.22

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 too 0.5″ (1/2″) as recommended by the Fiberglass Grating Manufacturers Council of the American Composites Manufacturers Association.