Heavy Duty Pultruded Grating – HD 25-60 – HD Bearing Bar PROGrate Pultruded Grating

2 1/2" 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

0.002

0.003

0.007

0.014

41850

5.21

18

<0.001

0.001

0.002

0.002

0.003

0.006

0.012

0.025

27900

9.85

24

<0.001

0.002

0.003

0.004

0.005

0.010

0.020

0.040

20925

14.50

30

0.001

0.003

0.004

0.006

0.007

0.014

0.029

0.058

14740

19.50

36

0.002

0.004

0.006

0.008

0.010

0.021

0.042

0.084

13950

23.25

42

0.003

0.006

0.009

0.012

0.015

0.030

0.061

0.121

11957

25.50

48

0.004

0.009

0.013

0.017

0.022

0.043

0.087

0.174

10463

26.50

54

0.006

0.012

0.018

0.024

0.030

0.060

0.120

0.240

9300

27.30

60

0.008

0.016

0.025

0.033

0.041

0.082

0.164

0.327

8370

27.50

66

0.011

0.022

0.032

0.043

0.054

0.108

0.216

0.432

7609

27.70

72

0.014

0.028

0.042

0.056

0.070

0.139

0.279

0.557

6975

27.90

78

0.018

0.035

0.053

0.070

0.088

0.176

0.352

6438

28.10

84

0.022

0.044

0.065

0.087

0.109

0.218

0.436

5979

28.30

90

0.027

0.053

0.080

0.107

0.133

0.266

0.533

5580

28.50

96

0.032

0.064

0.096

0.128

0.161

0.321

0.642

5231

28.70

102

0.038

0.077

0.115

0.153

0.191

0.383

4924

28.90

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

21428

5.21

18

<0.001

0.001

0.002

0.002

0.003

0.006

0.012

0.023

14285

9.85

24

0.001

0.002

0.004

0.005

0.006

0.012

0.025

0.050

10714

14.50

30

0.002

0.005

0.007

0.009

0.011

0.023

0.045

0.090

8571

19.50

36

0.004

0.008

0.012

0.016

0.020

0.039

0.078

0.157

5952

23.25

42

0.007

0.013

0.020

0.026

0.033

0.066

0.132

0.265

4373

25.50

48

0.011

0.022

0.033

0.043

0.054

0.109

0.217

0.435

3348

26.50

54

0.017

0.034

0.051

0.068

0.084

0.169

0.338

0.676

2646

27.30

60

0.026

0.051

0.077

0.102

0.128

0.256

0.511

2143

27.50

66

0.037

0.074

0.111

0.149

0.186

0.372

1771

27.70

72

0.052

0.105

0.157

0.209

0.261

0.523

1488

27.90

78

0.071

0.143

0.214

0.286

0.357

1268

28.10

84

0.095

0.191

0.286

0.382

0.477

1093

28.30

90

0.125

0.250

0.375

0.500

0.624

952

28.50

96

0.161

0.321

0.482

0.642

837

28.70

102

0.203

0.406

0.610

741

28.90

Properties Per Foot of Width

# of Bars

Load Bar Depth

Bar Centers

Weight/sq ft

A = 12.0 in2 I = 6.25 in4 S = 5.00 in3

8

2.5″

1.5″

9.81

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.