Fiberglass rectangular FRP grating is a great reinforced composite molded grating with concave non-slip top bars  
Uniform placement of continuous glass strands during manufacture provides superior strength.
A good choice for walkway and trench covers in many industrial applications.
Rectangular FRP Grating 26mm x 102mm (1x4")
Thickness  Bearing Bar  Cross Bar  Panel Size  Weight/Sq Meter  Open Area
 Width  Space  Width  Space      
26mm  6.3mm  25.4mm  9.5mm  102mm  915x3050mm  13.4kg  69%
1"  1/4"  1"  3/8"  4"  3'x10'  2.75lbs  69%
20mm Square Mesh Molded Grating (double-layer type) - more information

Thickness  Bar Spacing  Internal Bar Space  Panel Size  Weight/Sq Meter  Open Area
30mm  20x20mm  13x13mm  1000x2000mm  15.8 kg  42%
38mm Square Mesh Molded Grating
Thickness  Bar Spacing  Panel Sizes  Weight/Sq Meter  Open Area
26mm  38x38mm  915x3050mm, 1220x2440mm, 1220x3050mm, 1220x3660mm.  11.42kg  70%
38mm  38x38mm    18.36kg  69%
40mm Square Mesh Molded Grating
Thickness  Bar Spacing  Panel Sizes  Weight/Sq Meter  Open Area
26mm  40x40mm  1007x3007mm and 1000x2000mm  12kg  69%
30mm      14.4kg  68%
38mm      18.2kg  67%
40mm      19.2kg  67%
50mm Square Mesh Molded Grating
Thickness  Bar Spacing  Panel Size  Weight/Sq Meter  Open Area
50mm  50x50mm  1220x3660mm  20kg  69%