Image of grey FRP 1 1/2 X 3/4 X 3/4 inch square grid grating.

1 1/2" X 3/4" X 3/4" Square GridWheelchair Accessible

1½" Thick | 44% Open
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Product Description Part Number Resin Color Length Location Pieces  

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

0.002

0.003

0.005

0.006

0.008

0.016

0.032

0.063

3090

1.14

18

0.004

0.009

0.013

0.017

0.021

0.043

0.085

0.170

2060

1.43

24

0.009

0.018

0.026

0.035

0.044

0.088

0.176

0.352

1545

1.64

30

0.016

0.032

0.048

0.064

0.080

0.160

0.321

0.642

1236

1.75

36

0.027

0.053

0.080

0.106

0.133

0.266

0.532

1030

1.83

42

0.041

0.083

0.124

0.165

0.207

0.413

883

1.87

48

0.060

0.121

0.181

0.242

0.302

0.605

773

1.90

54

0.085

0.170

0.255

0.339

0.424

687

1.93

60

0.116

0.232

0.347

0.463

0.579

618

1.94

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

0.003

0.004

0.005

0.010

0.020

0.039

6180

1.14

18

0.004

0.008

0.012

0.016

0.020

0.040

0.080

0.159

2747

1.43

24

0.011

0.022

0.033

0.044

0.055

0.110

0.220

1545

1.64

30

0.025

0.050

0.075

0.100

0.125

0.251

0.502

989

1.75

36

0.050

0.100

0.149

0.199

0.249

0.498

687

1.83

42

0.090

0.181

0.271

0.362

0.452

505

1.87

48

0.151

0.302

0.454

0.605

386

1.90

54

0.239

0.477

305

1.93

60

0.362

247

1.94

Properties Per Foot of Width

# of Bars

Load Bar Width

Bar Centers

Weight/sq ft

A = 3.29 in2 I = 0.74 in4 S = 0.90 in3

8

0.25″

0.75″

4.75

Technical illustrations of concentrated load and uniform load for PROGrid Fiberglass Reinforced Plastic grating.

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.

 

Technical illustration of 1 1/2 X 3/4 X 3/4 inch FRP square grid grating.