Gratings are divided into two groups:

• Pultruded FRP gratingsare assembled of pultruded FRP profiles, with I bars, T-bars, as load bearing members, circular rods as connecting members and circular tubes as spacers between load bearing members.

 

• Moulded FRP gratings are in form of regular mesh or slot types.   They are formed in large metal moulds with hand-laid glass fibres as reinforcement and resins as matrix.