1 1/2″ X 1 1/2″ X 6″ Rectangular Grid PROGrid Molded Grating

1 1/2" Thick | 55% 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

0.003

0.004

0.005

0.006

0.013

0.026

0.051

3601

1.40

18

0.003

0.007

0.010

0.014

0.017

0.035

0.069

0.139

2401

1.75

24

0.007

0.014

0.022

0.029

0.036

0.072

0.144

1800

2.00

30

0.013

0.025

0.038

0.050

0.063

0.126

0.251

1440

2.24

36

0.021

0.042

0.062

0.083

0.104

0.208

0.415

1200

2.34

42

0.032

0.065

0.097

0.130

0.162

0.324

0.649

1029

2.38

48

0.048

0.095

0.143

0.190

0.238

0.476

900

2.42

54

0.067

0.134

0.202

0.269

0.336

0.672

800

2.44

60

0.091

0.183

0.274

0.366

0.457

720

2.46

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

0.002

0.002

0.003

0.004

0.008

0.016

0.032

7202

1.40

18

0.003

0.007

0.010

0.013

0.016

0.033

0.065

0.130

3201

1.75

24

0.009

0.018

0.027

0.036

0.045

0.090

0.180

1800

2.00

30

0.020

0.039

0.059

0.078

0.098

0.196

0.392

1152

2.24

36

0.039

0.078

0.117

0.156

0.195

0.389

800

2.34

42

0.071

0.142

0.213

0.284

0.355

588

2.38

48

0.119

0.238

0.357

0.476

0.595

450

2.42

54

0.189

0.378

0.567

356

2.44

60

0.286

0.572

288

2.46

Properties Per Foot of Width

# of Bars

Load Bar Width

Bar Centers

Weight/sq ft

A = 4.39 in2 I = 0.88 inST = 1.30 in3  SB = 1.06 in3

8

0.6″

1.5″

4.42

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. MAXIMUM LOAD represents a 4:1 factor of safety on ULTIMATE CAPACITY. 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.