Heavy Duty Pultruded Grating – HD 25-50 – HD Bearing Bar PROGrate Pultruded Grating

2 1/2" 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

0.001

0.003

0.006

0.012

59525

6.02

18

<0.001

0.001

0.002

0.002

0.003

0.005

0.010

0.020

39683

12.03

24

<0.001

0.002

0.002

0.003

0.004

0.008

0.016

0.032

29763

18.20

30

0.001

0.002

0.003

0.005

0.006

0.011

0.023

0.046

23810

24.50

36

0.002

0.003

0.005

0.007

0.008

0.017

0.034

0.068

19842

28.80

42

0.002

0.005

0.007

0.010

0.012

0.025

0.049

0.099

17007

31.20

48

0.003

0.007

0.010

0.014

0.017

0.035

0.070

0.139

14881

33.10

54

0.005

0.010

0.014

0.019

0.024

0.048

0.095

0.190

13228

34.50

60

0.006

0.013

0.019

0.026

0.032

0.064

0.128

0.256

11905

35.10

66

0.008

0.017

0.025

0.034

0.042

0.084

0.168

0.336

10823

35.60

72

0.011

0.022

0.033

0.043

0.054

0.109

0.217

0.434

9921

35.80

78

0.014

0.027

0.041

0.055

0.069

0.137

0.275

0.549

9158

36.00

84

0.017

0.034

0.051

0.068

0.085

0.171

0.341

0.682

8504

36.20

90

0.021

0.042

0.063

0.083

0.104

0.209

0.417

7937

36.40

96

0.025

0.050

0.076

0.101

0.126

0.252

0.504

7441

36.60

102

0.030

0.060

0.090

0.120

0.150

0.300

0.601

7003

36.80

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

0.007

30480

6.02

18

<0.001

0.001

0.001

0.002

0.002

0.005

0.009

0.019

20320

12.03

24

0.001

0.002

0.003

0.004

0.005

0.010

0.020

0.040

15240

18.20

30

0.002

0.004

0.005

0.007

0.009

0.018

0.036

0.072

12192

24.50

36

0.003

0.006

0.009

0.013

0.016

0.032

0.063

0.127

8466

28.80

42

0.005

0.011

0.016

0.022

0.027

0.054

0.108

0.216

6220

31.20

48

0.009

0.017

0.026

0.035

0.044

0.087

0.174

0.348

4762

33.10

54

0.013

0.027

0.040

0.053

0.067

0.134

0.267

0.535

3763

34.50

60

0.020

0.040

0.060

0.080

0.100

0.200

0.401

3048

35.10

66

0.029

0.058

0.087

0.116

0.145

0.289

0.578

2519

35.60

72

0.041

0.081

0.122

0.163

0.204

0.407

2117

35.80

78

0.056

0.112

0.167

0.223

0.279

0.558

1803

36.00

84

0.075

0.149

0.224

0.298

0.373

1555

36.20

90

0.098

0.196

0.293

0.391

0.489

1355

36.40

96

0.126

0.252

0.378

0.504

0.629

1191

36.60

102

0.160

0.319

0.479

0.638

1055

36.80

Properties Per Foot of Width

# of Bars

Load Bar Depth

Bar Centers

Weight/sq ft

A = 15.0 in2 I = 7.81 in4 S = 6.25 in3

10

2.5″

1.2″

12.14

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.