I-beam pultrusion grating is the multiple I-shaped ribs made with wearing pin connection, is the most common pultruded grating, the thickness of 1 "-3" between (about 25.4mm-76.2mm). 
 Grid in such a There are two special sub-series, one ADA series, the thickness is very small, narrow and dense ribs; one is 3 "series, the maximum thickness, the ribs are specially designed section of I-thickening beam, more like a grill ribs are overweight, but overweight compared with the thickness of the grating material savings.