Heavy Duty Pultruded Grating – HD 20-40 – HD Bearing Bar PROGrate Pultruded GratingWheelchair Accessible

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

<0.001

0.001

0.001

0.003

0.005

0.010

48090

6.92

18

<0.001

<0.001

0.001

0.002

0.002

0.005

0.009

0.019

32060

12.80

24

<0.001

0.002

0.003

0.003

0.004

0.009

0.017

0.034

24045

16.80

30

0.001

0.003

0.004

0.006

0.007

0.014

0.029

0.058

19236

19.50

36

0.002

0.005

0.007

0.009

0.011

0.023

0.045

0.090

16030

21.60

42

0.003

0.007

0.010

0.013

0.017

0.034

0.067

0.134

13740

23.00

48

0.005

0.010

0.014

0.019

0.024

0.048

0.096

0.193

12023

23.90

54

0.007

0.013

0.020

0.027

0.034

0.067

0.135

0.270

10687

24.34

60

0.009

0.018

0.027

0.036

0.046

0.091

0.182

0.365

9618

24.69

66

0.012

0.024

0.036

0.048

0.060

0.120

0.240

0.479

8744

25.00

72

0.015

0.031

0.046

0.061

0.077

0.154

0.307

0.614

8015

25.33

78

0.019

0.039

0.058

0.078

0.097

0.195

0.389

7398

25.40

84

0.024

0.048

0.072

0.096

0.121

0.241

0.482

6870

25.60

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

24623

6.92

18

<0.001

<0.001

0.001

0.002

0.002

0.004

0.009

0.018

16415

12.80

24

0.001

0.002

0.003

0.004

0.005

0.011

0.021

0.043

12311

16.80

30

0.002

0.005

0.007

0.009

0.011

0.023

0.045

0.090

9849

19.50

36

0.004

0.008

0.013

0.017

0.021

0.042

0.084

0.169

6840

21.60

42

0.007

0.015

0.022

0.029

0.037

0.073

0.147

0.294

5025

23.00

48

0.012

0.024

0.036

0.048

0.060

0.120

0.241

0.482

3847

23.90

54

0.019

0.038

0.057

0.076

0.095

0.189

0.379

3040

24.34

60

0.028

0.057

0.085

0.114

0.142

0.285

0.570

2462

24.69

66

0.041

0.082

0.124

0.165

0.206

0.412

2035

25.00

72

0.058

0.115

0.173

0.230

0.288

0.576

1710

25.33

78

0.079

0.158

0.237

0.316

0.395

1457

25.40

84

0.106

0.211

0.317

0.422

0.528

1256

25.60

Properties Per Foot of Width

# of Bars

Load Bar Depth

Bar Centers

Weight/sq ft

A = 14.4 in2 I = 4.80 in4 S = 4.80 in3

12

2″

1″

11.81

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.