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Documentation - Molded Grating - 1.5x6xh1.5-stair-tread

1.5 × 6 × H 1.5" (38 × 152 × H 38 mm) Stair Tread

Product Overview

This molded FRP stair-tread grating uses a directional 1.5-inch × 6-inch mesh and a 1.5-inch structural depth. The elongated mesh configuration provides a high 74% open area for drainage, airflow, and debris passage while maintaining the stiffness required for stair-tread applications.

The maximum panel width of 24.25 inches is suited to fabrication into individual stair treads and narrow access panels. Common uses include industrial stairways, maintenance access stairs, wastewater and water-treatment facilities, marine structures, chemical-processing plants, food-processing facilities, utility platforms, and other corrosive environments where slip resistance, drainage, and nonconductive construction are required.

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Dimensional Drawings

Imperial dimensional drawing for 1.5 by 6 inch mesh by 1.5 inch deep molded FRP stair tread
Figure 27: Imperial Units
Metric dimensional drawing for 38 by 152 millimeter mesh by 38 millimeter deep molded FRP stair tread
Figure 28: Metric Units

Product Specifications

Style Stair Tread
Top Open Area 74%
Measurement Metric Imperial
Mesh Length 38 mm 1.5 in
Mesh Width 152 mm 6.0 in
Mesh Thickness 38 mm 1.5 in
Bar Thickness at Top 8 mm 0.32 in
Bar Thickness at Bottom 6 mm 0.24 in
Maximum Panel Width 615 mm 24.25 in
Maximum Panel Length 3660 mm 144 in
Weight 22.95 kg/m2 4.7 lb/ft2

Load Tables

Table 8: Metric and Imperial Load Tables

Metric Load Table

Metric
Product Ultimate Uniform Load (kg/m2) Ultimate Point Load (kg)
Span (mm) 300 450 600 750 900 1,000 1,200 300 450 600 750 900 1,000 1,200
38 × 152 × H 38 mm Stair Tread 15,353 4,210 1,893 882 545 378 210 1,034 591 389 262 189 153 110

Imperial Load Table

Imperial
Product Ultimate Uniform Load (lb/ft2) Ultimate Point Load (lb)
Span (in) 12 18 24 30 36 40 48 12 18 24 30 36 40 48
1.5 × 6 × H 1.5" Stair Tread 3,145 862 388 181 112 77 43 2,278 1,303 858 578 416 337 241

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

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