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

1.5 × 1.5 × H 1" (38 × 38 × H 25 mm) Standard

Product Overview

This 1-inch-deep molded FRP grating uses a square 1.5-inch × 1.5-inch mesh with a high 68% open area. The square mesh provides comparable support characteristics in both panel directions, simplifying panel orientation and field fabrication while maintaining efficient drainage, ventilation, and light transmission.

Its relatively low weight makes it well suited to pedestrian walkways, maintenance platforms, equipment access areas, trench covers, drainage applications, wastewater and water-treatment facilities, marine environments, food-processing plants, chemical-processing facilities, and other corrosive locations where a lightweight, nonconductive walking surface is required.

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Dimensional Drawings

Imperial dimensional drawing for 1.5 by 1.5 inch mesh by 1 inch deep molded FRP standard grating
Figure 30: Imperial Units
Metric dimensional drawing for 38 by 38 millimeter mesh by 25 millimeter deep molded FRP standard grating
Figure 31: 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 25 mm 1.0 in
Bar Thickness at Top 6.5 mm 0.26 in
Bar Thickness at Bottom 5 mm 0.20 in
Maximum Panel Width 1220 mm 48 in
Maximum Panel Length 3660 mm 144 in
Weight 12.21 kg/m2 2.50 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 0.02 0.04 0.08 0.16 1,491 7,454
18 0.02 0.02 0.04 0.06 0.08 0.11 0.21 0.38 — 624 3,119
24 0.06 0.08 0.12 0.20 0.25 0.39 — — — 340 1,700
30 0.15 0.19 0.26 0.40 — — — — — 229 1,143
36 0.30 0.40 — — — — — — — 165 823
42 0.50 — — — — — — — — 112 562
48 — — — — — — — — — — —
54 — — — — — — — — — — —

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 0.03 0.04 0.06 0.13 709 3,543
18 0.02 0.04 0.08 0.12 0.20 0.39 — 474 2,369
24 0.05 0.10 0.21 0.30 0.50 — — 352 1,761
30 0.09 0.18 0.33 — — — — 284 1,419
36 0.17 0.32 — — — — — 232 1,159
42 0.26 0.44 — — — — — 208 1,041
48 — — — — — — — — —
54 — — — — — — — — —

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

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