Image of green structural fiberglass 1 1/2 X 1 1/2 X1 1/2 inch square grid grating.

1 1/2" X 1 1/2" X 1 1/2" Square Grid

1½" Thick | 68% 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

0.005

0.007

0.009

0.011

0.023

0.045

0.090

2041

0.80

18

0.005

0.011

0.016

0.022

0.027

0.055

0.109

1360

1.11

24

0.012

0.023

0.035

0.046

0.058

0.115

0.230

1021

1.25

30

0.021

0.043

0.064

0.086

0.107

0.214

816

1.31

36

0.036

0.072

0.108

0.144

0.180

0.360

680

1.35

42

0.056

0.113

0.169

0.225

0.282

0.563

583

1.37

48

0.084

0.167

0.251

0.334

0.418

510

1.38

54

0.119

0.238

0.357

0.476

0.594

453

1.38

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

0.003

0.004

0.006

0.007

0.014

0.028

0.057

4082

0.80

18

0.005

0.010

0.015

0.021

0.026

0.051

0.103

1813

1.11

24

0.014

0.029

0.043

0.058

0.072

0.144

0.288

1021

1.25

30

0.033

0.067

0.100

0.134

0.167

0.334

653

1.31

36

0.067

0.135

0.202

0.270

0.337

453

1.35

42

0.123

0.246

0.370

0.493

0.616

333

1.37

48

0.209

0.417

0.626

255

1.38

54

0.334

0.669

201

1.38

Properties Per Foot of Width

# of Bars

Load Bar Width

Bar Centers

Weight/sq ft

A = 2.73 in2 I = 0.49 in4 S = 0.65 in3

8

0.25″

1.5″

3.94

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 structural fiberglass 1 1/2 X 1 1/2 X 1 1 /2 inch square grid grating.