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Documentation - Molded Grating - 1.5x1.5xh1.5-standard

1.5 × 1.5 × H 1.5" (38 × 38 × H 38 mm) Standard

Product Overview

This 1.5-inch-deep molded FRP grating uses a square 1.5-inch × 1.5-inch mesh with a 68% open area. The square mesh provides comparable support characteristics in both panel directions, allowing flexible panel orientation and field fabrication while maintaining efficient drainage, airflow, and light transmission.

The 1.5-inch structural depth provides greater stiffness, load capacity, and span capability than the 1-inch and 1.2-inch profiles. Common applications include industrial walkways, elevated platforms, maintenance access areas, trench covers, wastewater and water-treatment facilities, marine structures, food-processing plants, chemical-processing facilities, and other corrosive environments requiring durable, nonconductive grating.

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Dimensional Drawings

Imperial dimensional drawing for 1.5 by 1.5 inch mesh by 1.5 inch deep molded FRP standard grating
Figure 35: Imperial Units
Metric dimensional drawing for 38 by 38 millimeter mesh by 38 millimeter deep molded FRP standard grating
Figure 36: Metric Units

Product Specifications

Style Standard
Top Open Area 68%
Measurement Metric Imperial
Mesh Length 38 mm 1.5 in
Mesh Width 38 mm 1.5 in
Mesh Thickness 38 mm 1.5 in
Bar Thickness at Top 7 mm 0.28 in
Bar Thickness at Bottom 5 mm 0.20 in
Maximum Panel Width 1524 mm 60 in
Maximum Panel Length 3660 mm 144 in
Weight 18.55 kg/m2 3.8 lb/ft2

Load Tables

Uniform Load — Deflection in Inches

Clear Span
(in)		 50
lb/ft2 		65
lb/ft2 		100
lb/ft2 		150
lb/ft2 		200
lb/ft2 		300
lb/ft2 		500
lb/ft2 		1,000
lb/ft2 		2,000
lb/ft2 		Maximum Recommended Load
(lb/ft2) 		Ultimate Load
(lb/ft2)
12 <0.01 <0.01 <0.01 <0.01 <0.01 0.01 0.02 0.04 0.07 3,327 16,635
18 <0.01 <0.01 0.01 0.02 0.03 0.04 0.07 0.14 0.28 1,354 6,772
24 0.02 0.03 0.04 0.06 0.08 0.13 0.22 0.42 — 774 3,868
30 0.05 0.06 0.09 0.14 0.19 0.28 0.45 — — 537 2,683
36 0.10 0.13 0.19 0.29 0.38 — — — — 361 1,806
42 0.18 0.21 0.35 — — — — — — 272 1,358
48 0.28 0.38 — — — — — — — 208 1,040
54 0.42 — — — — — — — — 165 825

Line Load — Deflection in Inches

Clear Span
(in)		 50
lb/ft		 100
lb/ft		 200
lb/ft		 300
lb/ft		 500
lb/ft		 1,000
lb/ft		 2,000
lb/ft		 Maximum Recommended Load
(lb/ft) 		Ultimate Load
(lb/ft)
12 <0.01 <0.01 0.01 0.02 0.03 0.05 0.11 1,593 7,963
18 0.01 0.02 0.03 0.05 0.08 0.15 0.31 1,085 5,424
24 0.02 0.03 0.07 0.10 0.17 0.32 — 774 3,871
30 0.03 0.06 0.12 0.19 0.29 — — 615 3,077
36 0.05 0.11 0.22 0.33 — — — 545 2,723
42 0.08 0.17 0.32 0.46 — — — 441 2,206
48 0.11 0.23 0.45 — — — — 406 2,031
54 0.15 0.30 — — — — — 347 1,737

Note: See Appendix A — Load Table Notes for assumptions, limitations, safety factors, and interpretation guidance.

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