Fiberglass pultruded grating 38mm I-bar 60% open rate, fire-resistant, UV protection, Chemical ... (VE), PhenolicThickness:25mm, 38mm, 50mmLoading Bar type: T-bar, I-barOpen rate: 33%, 40%, 50%, 60%Panel size: 1. ... for GP, Iso, resin,= 10 for VE,= 0 for phenolic,Smoke development index: = 310 for GP, ISO, VE,= 0 ... own design and technical request. fiberglass pultrusion grating, I-bar 38mm, 60% open rate