Available size:                 Open area weight/sqm
A              b                 c                 d
23mm         15mm         38mm       25mm            60%               11.80
23mm         15mm         38mm       25mm            50%               13.80
23mm         15mm         38mm       25mm            40%               16.30

Pultruded frp graing is made up of standard I or T shapes, they are specially processed sheet-like material withe great many blanks, they are widely used as structural material in undustries such as petroluem, chemical power ocean exploration electric plating marine waste water treatment, and even used as work platforms.