Types of materials

 In this section, we show you a major part of the materials in which we supply our grates, which allows us to find alternatives for the specific needs of our clients.


 Everything in Tramex is manufactured using 1st quality steel, always from the spool; we reject 2nds and 3rd-class ends. The quality used in our TRAMEX products is S235JR and S275JR stripped steel and, at the client’s request, we can make them in any other quality. The low silica content of our steel facilitates proper adherence of the galvanized coating, thereby producing a uniform, highly rust- and environment-resistant finish.


 AISI-304 nickel-chrome steel is the most commonly used of all types of stainless steel, as it has very good characteristics in terms of rusting and hygiene and is essential for use in the food industry, chemical laboratories, bottling plants, hospitals, etc.

If greater resistance to acids is required and there is a greater risk of corrosion, AISI-316 L nickel-chrome steel can be used with a molybdenum alloy.

The resistance to deformation of stainless steel is of a high structural quality at any temperature; it is not flammable and, in the event of a fire, the gases produced are non-toxic.


 This is a class of steel with a chemical composition that allows it to oxidize or rust with specific characteristics. The surface oxidation of the steel creates a waterproof and vapour-proof layer of rust that prevents oxidation of the steel inside.

Weathering steel has a high copper, chrome and nickel content, giving it a reddish-orange colour that varies according to the degree of oxidation.

Its colour and chemical properties are highly valued from an artistic point of view by sculptors and architects and it is common in modern framework and decoration, both vertical and horizontal.


 Pure aluminium is a soft metal with little mechanical strength, but it can be used to form alloys with other elements to increase its strength and acquire various useful properties. Aluminium alloys are light, strong and easy to handle for many processes in metalworking, which makes it possible to reduce weight in applications that require it. E.g.: Water tanks, suspended ceilings, façades, boats, machinery, etc. It also takes a large variety of finishes.

Another property of aluminium is its corrosion resistance, which makes it highly valued in construction.

Our grates are made using 1050H aluminium, though other qualities can easily be used for custom orders.


 FRP (fibreglass reinforced polyester) grates combine strands of fibreglass with thermosetting resin to form a strong moulded panel in a single piece, intended for use where it must be able to withstand the effects of corrosion and the environment.

*Polyester resin gives the system solidity and determines the chemical resistance of the product. It contains agents that protect against UV radiation.

*Continuous fibreglass in a proportion of 30% ensures optimum mechanical characteristics.

*Silica of the right particle size on the top of the grating provides it with optimum non-slip properties.