I 15-50 – I Bearing Bar PROGrate Pultruded Grating

1 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

0.002

0.003

0.004

0.007

0.015

0.029

11055

2.46

18

0.002

0.003

0.005

0.006

0.008

0.015

0.030

0.061

7370

4.00

24

0.003

0.006

0.009

0.012

0.015

0.030

0.060

0.119

5528

4.84

30

0.005

0.011

0.016

0.021

0.027

0.054

0.107

0.214

4422

5.25

36

0.009

0.018

0.027

0.036

0.045

0.089

0.178

0.356

3685

5.46

42

0.014

0.028

0.042

0.056

0.070

0.139

0.279

0.558

3159

5.53

48

0.021

0.041

0.062

0.083

0.103

0.206

0.413

2764

5.58

54

0.029

0.059

0.088

0.117

0.146

0.293

0.586

2457

5.60

60

0.040

0.080

0.120

0.160

0.200

0.401

2211

5.61

66

0.053

0.106

0.160

0.213

0.266

0.532

2010

5.63

72

0.069

0.138

0.207

0.276

0.345

0.689

1843

5.64

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

0.002

0.002

0.005

0.009

0.018

13992

2.46

18

0.001

0.003

0.004

0.006

0.007

0.014

0.028

0.057

9328

4.00

24

0.004

0.007

0.011

0.015

0.019

0.037

0.074

0.149

5878

4.84

30

0.008

0.017

0.025

0.034

0.042

0.084

0.168

0.335

3486

5.25

36

0.017

0.033

0.050

0.067

0.083

0.167

0.334

0.668

2485

5.46

42

0.031

0.061

0.092

0.122

0.153

0.305

0.610

1806

5.53

48

0.052

0.103

0.155

0.206

0.258

0.516

1384

5.58

54

0.082

0.165

0.247

0.330

0.412

1091

5.60

60

0.125

0.250

0.376

0.501

0.626

886

5.61

66

0.183

0.366

0.548

730

5.63

72

0.259

0.517

614

5.64

Properties Per Foot of Width

# of Bars

Load Bar Depth

Bar Centers

Weight/sq ft

A = 3.89 in2 I = 1.11 in4 S = 1.47 in3

10

1.5″

1.2″

3.60

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.