Heavy Duty Pultruded Grating – HD 20-50 – HD Bearing Bar PROGrate Pultruded Grating

2" Thick | 50% 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

0.002

0.004

0.007

0.014

43449

5.14

18

<0.001

0.001

0.002

0.003

0.003

0.007

0.013

0.027

28966

9.10

24

0.001

0.002

0.003

0.004

0.006

0.011

0.022

0.045

21725

12.90

30

0.002

0.003

0.005

0.007

0.009

0.017

0.035

0.069

17380

16.20

36

0.003

0.005

0.008

0.010

0.013

0.026

0.052

0.103

14483

18.83

42

0.004

0.008

0.012

0.015

0.019

0.038

0.077

0.154

12414

20.10

48

0.006

0.011

0.017

0.022

0.028

0.056

0.111

0.223

10862

20.67

54

0.008

0.016

0.024

0.032

0.039

0.079

0.158

0.315

9655

20.80

60

0.011

0.021

0.032

0.043

0.054

0.107

0.214

0.428

8690

21.02

66

0.014

0.028

0.043

0.057

0.071

0.142

0.284

0.569

7900

21.06

72

0.018

0.037

0.055

0.074

0.092

0.184

0.368

7142

21.12

78

0.023

0.047

0.070

0.093

0.117

0.233

0.466

6684

21.20

84

0.029

0.058

0.087

0.116

0.145

0.290

0.580

6207

21.30

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

0.004

0.009

22248

5.14

18

<0.001

0.001

0.002

0.003

0.003

0.006

0.013

0.025

14832

9.10

24

0.001

0.003

0.004

0.006

0.007

0.014

0.028

0.056

11124

12.90

30

0.003

0.005

0.008

0.011

0.014

0.027

0.054

0.109

8899

16.20

36

0.005

0.010

0.015

0.019

0.024

0.048

0.097

0.194

6180

18.83

42

0.008

0.017

0.025

0.034

0.042

0.084

0.168

0.336

4540

20.10

48

0.014

0.028

0.042

0.056

0.070

0.139

0.279

0.557

3476

20.67

54

0.022

0.044

0.067

0.089

0.111

0.222

0.444

2747

20.80

60

0.033

0.067

0.100

0.134

0.167

0.334

0.669

2225

21.02

66

0.049

0.098

0.147

0.196

0.244

0.489

1839

21.06

72

0.069

0.138

0.207

0.276

0.345

0.690

1545

21.12

78

0.095

0.189

0.284

0.379

0.474

1316

21.20

84

0.127

0.254

0.380

0.507

0.634

1135

21.30

Properties Per Foot of Width

# of Bars

Load Bar Depth

Bar Centers

Weight/sq ft

A = 12.0 in2 I = 4.00 in4 S = 4.00 in3

10

2″

1.2″

9.92

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.