For a very long time within the engineering and construction industries, steel, concrete and timber are the  commonly used materials  in the construction  of platforms and  walkways. These traditional materials have  posed various  problems due  to dilapidation and  deterioration over  time. In  offshore application,  steel  platform  is  always  exposed  to  harsh  marine  environments and  enhancement  of corrosion resistance is required to prevent failure 

Similarly, the corrosion of steel reinforcement is reported as the most frequent cause of failure of offshore concrete platforms

For timber, the risk for  biological deterioration  should  be considered  when the  structure is  exposed  to high  moisture conditions to avoid catastrophic failure 

Given the issues of these traditional engineering materials, there has  been an urgent  need for a  more sustainable materials and  technologies that  will assist in increasing the longevity and lifespan of structures in corrosive and wet environments. Fibre  reinforced  polymer  (FRP)  grating  demonstrates  numerous  advantages  over  customary materials for  use in platforms and  walkways, particularly  within harsh and  corrosive environments where traditional materials have proven to suffer. The popularity of fibre composite gratings is slowly gaining momentum as they offer a number of attractive benefits such as light weight, high corrosion resistance, electrical insulation, and non-magnetic properties

In fact, the Queensland Government  has identified  walkways and  drainage grating  as  some  of the  many applications of  composite gratings in the mining, minerals and chemical processing plants due to its highly corrosion resistance. Currently, there are two types of composite gratings available, i.e. pultruded and moulded gratings

the popularity of fibre reinforced polymer (FRP) grating is slowly gaining momentum as they offer numerous advantages over customary materials for use in platforms and walkways, particularly within harsh and corrosive environments. However, there are still no detailed guidelines relating to the design and use of FRP gratings, making this material at a disadvantage when considered against traditional construction materials. In this paper, an experimental investigation was conducted using full-size moulded FRP gratings to have an understanding on their behaviour under three different loading conditions, i.e. line loading at midspan, and concentrated loading applied at midspan and near the support. It was found that the concentrated load regardless of the location of the load application is more critical than the line loading. The FRP gratings under line loading failed at an applied load of around 56kN while the gratings under the concentrated load failed at an applied load of only around 30 kN. The two concentrated loading cases showed very similar failure behaviour on which the loading block sank into the grid and crushed the grid under the loading area. On the other hand, the failure of the FRP gratings under a line loading was a major flexural tensile cracking at midspan. From this study, a better understanding on the behavior of moulded FRP gratings is gained for their widespread use and application in civil infrastructure particularly in platforms and walkways.