Fiberglass Reinforced Polymers (FRP) CATALOGUE

MECHANICAL TESTS CHEMICAL RESISTANCE TEST For further details, the reference standard document can be downloaded from www.mmgrigliati.com

ABOUT US Since its inception in 1977, M.M. has been operating in the glass fibre reinforced polymers (FRP) industry, producing high quality gratings and structures (handrail systems, walkways, stairways, ladders, fences, gates, etc.). The intrinsic properties of FRP allow to create light, resistant and easy to install structures that do not require maintenance and are characterised by great versatility of use. The company offers customized solutions and additional services such as technical design, structural calculation for composite materials, chemical and mechanical resistance tests, any type...

02 HOW TO CHOOSE THE GRATING The following table details the characteristics of the resins that allows to choose the right type of grating on the basis of their application and the environment in which it is to be installed. CONDUCTIVE FIRE RETARDANT CHEMICAL CHARACTERISTICS TYPE OF RESIN HDT (ISO 75) GLASS TRANSITION TEMPERATURE (ASTM D3418) PH RANGE TEMPERATURE RANGE BARCOL HARDNESS (ASTM 2583) STANDARD COLOUR MECHANICAL CHARACTERISTICS DENSITY MODULUS OF ELASTICITY (open mesh) ULTIMATE LIMIT TENSION (open mesh) For further details, the reference standard document can be downloaded from ww

GRATINGS Gratings are produced using the resin transfer moulding technology (RTM). They are available in a wide range of sizes, thus ensuring a prompt solution to widely differing tasks, and are made of very simple and quick to install monolithic panels. Gratings are designed with a high safety factor and produced under the most strict controls according to DIN 24537-3. RESIN types WIDE RANGE of sizes DIFFERENT finishings It is possible to carry out feasibility studies of special gratings and customized solutions based on customer’s needs. PLEASE CONTACT OUR TECHNICAL DEPARTMENT for a tailor-made...

CHEMICAL RESISTANCE TEST OF NON-STRESSED THERMOSETTING RESINS The comparative tests carried out in cooperation with the Tor Vergata University of Rome, consisting in the immersion of the samples in the substances indicated and for the time and at the temperatures specified in the Table below, show that the galvanized steel specimens suffer from widespread corrosion caused by the reactions triggered by the solutions, as opposed to the fibreglass specimens which, only in some cases, show little signs of corrosion. STANDARD IFR LINE Polyester resin Self-extinguishing CHEMICAL AGENT PREMIUM ISO LINE...

CHEMICAL AGENT STANDARD IFR LINE Polyester resin Self-extinguishing PREMIUM ISO LINE Isophthalic Resin PREMIUM VIN LINE Vinylester resin GALVANIZED METAL Sulphuric acid H20 + 60% H2SO4 Colour variation Fibre exposure Stress corrosion cracking Salt deposits Surface delamination Weight loss Very moderate Viscous precipitates Colour variation Fibre exposure Stress corrosion cracking Salt deposits Surface delamination Weight loss Moderate increase Viscous precipitates Colour variation Fibre exposure Stress corrosion cracking Salt deposits Surface delamination Weight loss Viscous precipitates Violent...

CHEMICAL RESISTANCE Table of the chemical resistance of products made with different resins in contact with a selection of chemical agents. For further information, please contact the Technical Department. Acetic Acid Benzoic Acid Hydrochloric Acid Perchloridric Acid Chromic Acid Hydrofluoric Acid Phosphoric Acid Nitric Acid Sulphuric Acid Aluminium Hydroxide Ammonium Hydroxide Sodium Hydroxide Ammonium Bicarbonate Ammonium Chloride Ammonium Sulphate Calcium Chloride Calcium Nitrate Ferric Chloride Ferrous Chloride Lithium Chloride Magnesium Chloride Magnesium Nitrate Manganese Sulphate Potassium...

No lead, no methanol Gasoline Acetone ORGANIC COMPOUNDS C2H6O2 Ethylene Glycol Lactic Acid Citric Acid Hydrogen Peroxide WHITENING AGENTS H2O2 GAS AND FUMES Cl2 Formaldehyde Urea C - continuous exposure of the gratings to the chemical environment at the specified temperatures O - occasional exposure of the gratings to the chemical environment at the specified temperatures NR - Not recommended The information and recommendations shown above are given in good faith and based on our best knowledge. The Chemical Resistance Table is to be considered as a general guide and not as a guarantee. For specific...

LOAD TABLES BY GRATING TYPE The following tables show how the loads that vary according to the distance between the supports (L), generating in the grating a deflection of 1/200 of the distance itself (e.g. with distance between the supports (L) 600 mm, load deflection indicated (ƒ) 3 mm). The figures refer to distributed loads and to concentrated loads on a 200 x 200 mm footprint with the gratings simply resting on both ends. CONCENTRATED LOADS DISTRIBUTED LOADS TYPES OF SUPPORT FOR GRATINGS The drawings below show which could be the types of supports. The gratings support width must be at least...

STANDARD IFR/CFR LINE GRATINGS LOAD-DEFORMATION L (mm) ƒ (mm) kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² TYPE OF GRATING SCH38/15 SCH38/25 SCH38/30 SQUARE MESH RECTANGULAR MESH MINI MESH MICRO MESH DOUBLE COVERED Concentrated load Distributed load For further details, the reference standard document can be downloaded f

STANDARD VFR LINE GRATINGS LOAD-DEFORMATION TYPE OF GRATING SCH38/15 VFR SCH38/25 VFR SCH38/30 VFR SQUARE MESH RECTANGULAR MESH SCH30/28 VFR SCH13/30 VFR SCH13/38 VFR MINI MESH MICRO MESH DOUBLE COVERED Concentrated load L (mm) ƒ (mm) kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² kg kg/m² Distributed load For further details, the reference standard document can be downloaded from www.mmgrigliati.com...