I 30-50 – I Bearing Bar PROGrate Pultruded Grating

3" Thick | 50% Open
Request a Quote
Special Order

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

0.002

0.004

0.008

46720

8.56

18

<0.001

<0.001

0.001

0.002

0.002

0.004

0.008

0.016

31147

15.02

24

<0.001

0.001

0.002

0.003

0.003

0.007

0.014

0.027

23360

21.12

30

0.001

0.002

0.003

0.004

0.005

0.010

0.021

0.042

18688

26.84

36

0.002

0.003

0.005

0.006

0.008

0.015

0.030

0.060

15573

32.25

42

0.002

0.004

0.006

0.008

0.011

0.021

0.042

0.084

13349

36.75

48

0.003

0.006

0.009

0.011

0.014

0.029

0.057

0.115

11680

40.14

54

0.004

0.008

0.011

0.015

0.019

0.038

0.076

0.153

10382

43.00

60

0.005

0.010

0.015

0.020

0.025

0.050

0.100

0.201

9344

44.86

66

0.007

0.013

0.020

0.026

0.033

0.065

0.130

0.260

8495

46.00

72

0.008

0.017

0.025

0.033

0.041

0.083

0.165

0.331

7787

47.00

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

0.001

0.003

0.005

59802

8.56

18

<0.001

<0.001

0.001

0.002

0.002

0.004

0.008

0.015

26578

15.02

24

<0.001

0.002

0.003

0.003

0.004

0.009

0.017

0.034

14950

21.12

30

0.002

0.003

0.005

0.007

0.008

0.016

0.033

0.065

9568

26.84

36

0.003

0.006

0.008

0.011

0.014

0.028

0.057

0.113

6645

32.25

42

0.005

0.009

0.014

0.018

0.023

0.046

0.092

0.184

4882

36.75

48

0.007

0.014

0.022

0.029

0.036

0.072

0.143

0.287

3738

40.14

54

0.011

0.021

0.032

0.043

0.054

0.107

0.215

0.429

2953

43.00

60

0.016

0.031

0.047

0.063

0.078

0.157

0.313

0.627

2392

44.86

66

0.022

0.045

0.067

0.090

0.112

0.224

0.448

1977

46.00

72

0.031

0.062

0.093

0.124

0.155

0.310

0.620

1661

47.00

Properties Per Foot of Width

# of Bars

Load Bar Depth

Bar Centers

Weight/sq ft

A = 12.04 in2 I = 11.47 in4 S = 7.65 in3

10

3″

1.2″

10.34

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.