DURA GRATING - TECHNICAL SPECIFICATIONS - January 2014
1 Definition
Glass-reinforced plastic (GRP or fibreglass) is a composite material made of a thermosetting plastic resin reinforced by fine fibres of glass along with the use of additives and is commonly referred to by the name of fibreglass
1.1 Applications
GRP is an immensely versatile material which combines lightweight with inherent strength to provide a resilient finished product with a variety of surface textures and a virtually unlimited colour range available. By selecting the appropriate combination of fibreglass reinforcements, resins and processing techniques, the engineer can create a product or component to meet the most demanding of specifications.
2.1 Benefits
High strength, light weight, dimensional stability, corrosion/chemical/electrical resistance, low tooling/installation cost, long life. GRP products compete very favourably on a performance/life cycle cost basis versus traditional materials.
2.2 Open Area
Dura Grating Standard 25mm, 30mm, 38mm thickness panels have a 68% Open Area. Dura Grating Standard 13mm, 50mm thickness panels have a 78% Open Area.
Dura Grating Mini 14mm, 22mm, 30mm, 38mm thickness panels have an Open Area of 42% Dura Grating Micro 22mm, 30mm thickness panels have an Open Area of 36%
2.3 Raw Material Characteristics
Two main components produce composite GRP: polyester resin and glass fibres. Isopthalic polyester resin is used to manufacture Dura Grating Standard Mesh due to its great compromise of performance and cost. Orthopthalic resin used to manufactuer Dura Grating Mini Mesh and Phenolic & Vinylester resin is available by special order according to project needs.
2.5 Product
Dura Grating is a moulded non-slip composite floor grating system
constructed from fibreglass as an ideal and cost effective alternative to traditional floor grating materials like mild steel, stainless steel grating, aluminium or wood. Dura Grating grid flooring is durable, lightweight and chemical and corrosion resistant which makes it ideal for the industrial, chemical, construction and shipping industries.
2.4 Typical Material Properties Resin Glassfibre
Density kg/m³ (Specific Gravity) 1200 2100
Hardness (Barcol) 38 45
Tensile Strength Mpa 55 207
Modulus of Elasticity GPa / (Tensile Modulus) 3.5 16
Compressive Strength MPa 140 18
Flexural Strength MPa 78 182
Interlaminate Shear Strength MPa Na 9
Water Absorption % 0.15 0
Voltage breakdown (k volts/mm) - 18
Thermal Conductivity W/moC 0.21 0.29
Max Operating Temp (deg. oC) 140 200
The finished product is produced in several panel thickness sizes and panel length/width sizes. Bespoke panel size options are available upon request.
2.6 Size Specification
Dura Grating Standard Mesh Grating
Panel Size (mm) Open Mesh
Size Weight (Kg/m2) Panel Weight (Kg) Thickness Length Width
13 3050 1020 50x50M45x45H 5.8 18.04 13 3660 1220 50x50M45x45H 25.90 25 3000 1000 38x38M32x32H 12.3 36.90 25 3660 1220 38x38M32x32H 54.92 30 3000 1000 38x38M32x32H 14.6 43.80 30 3660 1220 38x38M32x32H 65.19 38 3000 1000 38x38M32x32H 19.5 58.50 38 3660 1220 38x38M32x32H 87.07 50 3050 1020 50x50M42x42H 23.5 73.11 50 3660 1220 50x50M42x42H 104.93
Dura Grating Mini Mesh Grating
Panel Size (mm) Open Mesh
Size Weight (Kg/m2) Panel Weight (Kg) Thickness Length Width
14 3007 1007 12x12 9.5 47.5 14 4047 1247 12x12 28.5 22 3007 1007 12x12 13.0 78.0 22 4047 1247 12x12 65.0 22 4047 1527 12x12 39.0 30 3007 1007 12x12 18.5 56 30 4047 1247 12x12 93.4 38 3007 1007 12x12 24.5 98.0 38 4047 1247 12x12 122.5
Dura Grating Micro Mesh Grating *Special Order Only Panel Size (mm) Open Mesh
Size Weight (Kg/m2) Panel Weight (Kg) Thickness Length Width
22 3007 1007 8x8 15.32 46.39 22 4047 1247 8x8 77.31 22 4047 1527 8x8 94.67 30 3007 1007 8x8 18.84 57.05 30 4047 1247 8x8 95.08 30 4047 1527 8x8 116.43
3.0 Load Bearing Specification
Load bearing capacity and panel deflection depend on panel thickness and unsupported span.
Dura Grating Standard Mesh Grating - Load and Deflection (Kg/metre @ 1% Deflection)
Panel Thickness (mm) Span Type of Loading 250mm 500mm 600mm 750mm 1000mm 1200mm 1500mm 2000mm 13 Point Load 79kg 20kg 14kg 9kg 5kg 3kg 2kg 1kg UDL 570kg 158kg 92kg 47kg 20kg 11kg 6kg 2kg 25 Point Load 1,585kg 464kg 322kg 206kg 116kg 80kg 51kg 29kg UDL 2,751kg 1,375kg 850kg 435kg 184kg 106kg 54kg 23kg 30 Point Load 2,381kg 836kg 581kg 372kg 209kg 145kg 92kg 52kg UDL 4,761kg 2,381kg 1,765kg 904kg 381kg 221kg 113kg 48kg 38 Point Load 3,814kg 1,698kg 1,179kg 755kg 424kg 294kg 188kg 106kg UDL 7,629kg 3,814kg 3,179kg 1,834kg 774kg 448kg 229kg 97kg 50 Point Load 5,933kg 2,967kg 2,414kg 1,545kg 868kg 603kg 386kg 217kg UDL 11,866kg 5,933kg 4,944kg 3,754kg 1,584kg 916kg 469kg 198kg
Dura Grating Mini Mesh Grating - Load and Deflection (Kg/metre @ 1% Deflection) Panel Thickness (mm) Span Type of Loading 250mm 500mm 600mm 750mm 1000mm 1200mm 1500mm 2000mm 14 Point Load 397kg 99kg 69kg 44kg 37kg 25kg 17kg 8kg UDL 1,118kg 334kg 194kg 99kg 42kg 24kg 12kg 5kg 22 Point Load 1,091kg 316kg 220kg 141kg 118kg 79kg 55kg 26kg UDL 2,260kg 1,062kg 615kg 315kg 133kg 77kg 39kg 17kg 30 Point Load 2,340kg 925kg 643kg 411kg 231kg 161kg 76kg 58kg UDL 4,867kg 3,118kg 1,804kg 924kg 390kg 226kg 115kg 49kg 38 Point Load 3,721kg 1,864kg 1,294kg 828kg 466kg 324kg 207kg 116kg UDL 7,740kg 6,281kg 3,225kg 1,861kg 785kg 454kg 233kg 98kg
Dura Grating Micro Mesh Grating - Load and Deflection (Kg/metre @ 1% Deflection)
Panel Thickness (mm) Span Type of Loading 250mm 500mm 600mm 750mm 1000mm 1200mm 1500mm 2000mm 22 Point Load 1,249kg 362kg 251kg 161kg 91kg 63kg 40kg 23kg UDL 2,597kg 1,220kg 706kg 361kg 153kg 45kg 28kg 19kg 30 Point Load 2,459kg 972kg 675kg 432kg 243kg 169kg 108kg 61kg UDL 5,114kg 2,557kg 1,896kg 971kg 410kg 121kg 76kg 51kg 4.0 Product Specifications
Characteristics Unit Reference
Tensile Strength 220Mpa ASTM D1037-93
Modulus of Elasticity 21Gpa ASTM D1037-93
Flexural Strength 280Mpa ASTM D1037-93
Compressive Strength 145Mpa ASTM D1037-93
Voltage breakdown 18K volts/mm ASTM D149
Density kg/m³ (Specific Gravity) 2100 ISO 9001
Thermal Expansion Factor 13 x 10-6 mm/mm oC ISO 9001
Water Absorption rate 0.45 x 24 hrs ASTM D570
Operating Temperature -100 oC to +200 oC ISO 9001
Flammability resistance Class 2, Option of Class 2, 1 or Class 0 BS476 Part 7 & 6
Frost resistance No Effect DD CEN/TS 772-22:2006
Weather ability Pass MOAT 22
Anti-Slip Surface 0.82 CoF (with anti-slip finish only)_ BS 4592-0
UV Weather 5000hrs ISO 4892-2 Xenon Arc
4.1 Testing Standards Fire Certificate
Standard Iso Resin - BS 476 Part 7 Class 2. Special Order Iso Resin - BS 476 Part 7 Class 1. Special Order Phenolic Resin - BS 476 Part 6 & 7 Class 0. ASTM-E84 Flame Spread 25, Smoke Density 325
4.2 Slip Certificate
BS 4592-0 Ramp Test, Dura Grating Mini Mesh – Wet 0.76 Cof. BS 4592-0 Ramp Test, Dura Grating Standard – Wet 0.82 Cof. BS 4592-0 Ramp Test, Dura Grating Standard – Oil 0.78 Cof.
4.3 Load Certificate
BS EN 124 – Class A15.
4.4 UV Certificate
UV Weather ISO 4892-2 Xenon Arc 5000hrs
4.5 Colour and Surface Finish
Standard stock colours are Light Grey and Green for Standard Grating. Light Grey, Green and Sand for Mini Mesh. Bespoke colours are available (Colour range is more limited for Class 1 & 0 fire rated product). Supplied in smooth or gritted (Silicone Carbide), different grit sizes are available.
5.0 Chemical Resistance
Dura Grating standard product is resistant against wide a range of chemicals across wide temperature
spectrum. Dura Grating can be made of different resin systems to achieve specific chemical resistance.
RESIN TYPE Vinylester Isophthalic Orthophthalic
Environment %Conc. Max.Oper. Temp.F/C. %Conc. Max.Oper. Temp.F/C. %Conc. Max.Oper. Temp.F/C.
Acetic Acid 50 180/82 50 125/52 25 N/R
Aluminum Hydroxide 100 180/82 100 160/71 ALL -
Ammonium Chloride ALL 210/99 ALL 170/77 ALL -
Ammonium Bicarbonate 50 160/70 15 125/52 ALL -
Ammonium Hydroxide 28 100/38 28 N/R ALL N/R
Ammonium Sulfate ALL 210/99 ALL 170/77 ALL -
Benzene ALL N/R ALL N/R ALL N/R
Benzoic Acid SAT 210/99 SAT 150/66 ALL 77/25
Borax SAT 210/99 SAT 170/77 ALL -
Calcium Carbonate ALL 180/82 ALL 170/77 ALL -
Calcium Nitrate ALL 210/99 ALL 180/82 ALL -
Carbon Tetrachloride 100 150/65 100 N/R 100 N/R
Chlorine Dry Gas - 210/99 - 140/60 - N/R
Chlorine Water SAT 200/93 SAT 80/27 SAT N/R
Chromic Acid 10 150/65 5 70/21 5 N/R
Citric Acid ALL 210/99 ALL 170/77 ALL 77/25
Copper Chloride ALL 210/99 ALL 170/77 ALL 104/40
Copper Cyanide ALL 210/99 ALL 170/77 ALL 77/25
Copper Nitrate ALL 210/99 ALL 170/77 ALL -
Ethanol 50 100/38 50 75/24 10 77/25
Ethylene Glycol 100 200/93 100 90/32 100 104/40
Ferrous Chloride ALL 210/99 ALL 170/77 ALL 86/30
Formaldehyde ALL 150/65 50 75/24 25 - Glucose 100 210/99 100 170/77 ALL - Gasoline 100 180/82 100 80/27 100 77/25 Glycerin 100 210/99 100 150/66 100 - Hydrobromic Acid 50 150/65 50 120/49 18 - Hydrochloric Acid 37 150/65 37 75/24 10 86/30 Hydrogen Peroxide 30 150/65 5 100/38 5 N/R
Lactic Acid ALL 210/99 ALL 170/77 ALL 77/25
Lithium Chloride SAT 210/99 SAT 150/66 ALL -
Magnesium Chloride ALL 210/99 ALL 170/77 ALL 104/40
Magnesium Nitrate ALL 210/99 ALL 140/60 ALL 86/30
Magnesium Sulfate ALL 210/99 ALL 170/77 ALL 104/40
RESIN TYPE Vinylester Isophthalic Orthophthalic 140/60 ALL 104/40
Environment %Conc. Max.Oper. Temp.F/C. %Conc. Max.Oper. Temp.F/C. %Conc. Max.Oper. Temp.F/C.
Nickel Sulfate ALL 210/99 ALL 170/77 ALL 104/40
Nitric Acid 20 120/49 20 70/21 2 N/R
Oxalic Acid ALL 210/99 ALL 75/24 ALL N/R
Perchloric Acid 30 100/38 10 N/R 10 N/R
Phosphoric Acid 100 210/99 100 120/49 80 N/R
Potass.Chloride ALL 210/99 ALL 170/77 ALL 104/40
Potassium Dichromate ALL 210/99 ALL 170/77 ALL 77/25
Potassium Sulfate ALL 210/99 ALL 170/77 ALL 104/40
Propylene Glycol ALL 210/99 ALL 170/77 ALL 104/40
Sodium Acetate ALL 210/99 ALL 160/71 ALL 104/40
Sodium Bisulfate ALL 210/99 ALL 170/77 ALL -
Sodium Bromide ALL 210/99 ALL 170/77 5 -
Sodium Cyanide ALL 210/99 ALL 170/77 5 N/R
Sodium Hydroxide 25 180/82 N/R N/R 1 N/R
Sodium Nitrate ALL 210/99 ALL 170/77 ALL 104/40
Sodium Sulfate ALL 210/99 ALL 170/77 ALL 104/40
Stannic Chloride ALL 210/99 ALL 160/71 ALL 104/40
Sulfuric Acid 75 100/38 25 75/24 10 -
Tartaric Acid ALL 210/99 ALL 170/77 ALL -
Vinegar 100 210/99 100 170/77 ALL -
Water Distilled 100 180/82 100 170/77 ALL 86/30
Zinc Nitrate ALL 210/99 ALL 170/77 ALL 104/40
6.0 Dura Grating Standard S/S Fixings & Accessories 6.1 Surface Mounted Fixings
Small & Large Dome Head Washer
To Suit Grating Mesh:
Standard 32x32 – Large Dome Washer Standard 42x42 – Not Suitable
Mini – Large and Small Dome Washer Micro – Small Dome Washer
.2 Recessed Fixings
M8 Square Recessed 32x32 & 42x42
42x42 32x32
To Suit Grating Mesh:
Standard 32x32 – Square Recessed 32x32 Standard 42x42 – Square Recessed 42x42
Mini – Square Recessed 32x32 (Cutting required, see drawing) Micro – Square Recessed 32x32 (Cutting required, see drawing)
6.3 M Clips Standard and Mini
M8 Standard 32x32 M8 Standard 42x42
M6 Mini Mesh Shallow M6 Mini Mesh Deep
To Suit Grating Mesh:
Standard 32x32 – M Clip 32x32 Standard 42x42 – M Clip 42x42
Mini – Shallow and/or Deep. Shallow 14mm, Deep 22mm, 30mm, 38mm. Micro – Not Suitable
6.4 G Clamps
To Suit Grating Mesh:
Standard 32x32 – G Clamp Available for all Thicknesses
Standard 42x42 – G Clamp Available for all Thicknesses, accept 13mm Mini – G Clamps Available for all Thicknesses, accept 14mm
6.5 M8 J Clamp
Suits all Grating Mesh (Cutting Required for Mini & Micro to suit M8)
6.6 M8 Channel Clamp
Special Bolt Fixings to Suit Clip and Type of Substrate are available.
7 Safety Data Sheet
This section provides data for protection against substances hazardous to health.
7.1 Material Identification and Use
Chemical Name: Fibreglass Reinforced Polyester
Common Name: GRP (Glass Reinforced Plastics, Fibreglass) Product Identification: Dura Grating
Uses: Structural Flooring, Duct Cover, Trench or Gully Covers, Man Hole Cover.
7.2 Composition
E Glass fibres (Uni-Directional), Stitched Chop Strand Matt, Woven Roving Comb Matt, thermosetting plastic resin, catalysts, styrene, aluminium oxide, pigments. UV Inhibitor. Components are chemically and thermally cured and bonded together.
7.3 Hazard Identification
None by contact. Dust produced by cutting or grinding can penetrate pores and skin causing itching. Avoid breathing dust.
First Aid procedure: Skin – shower with water and soap. Eyes – flush with sterile eye wash solution.
7.4 Product Appearance
Open or closed profiles. Sharp edges. Zero odours. Not solvable in water. Standard colour Grey RAL 7047, others available on request.
7.5 Fire Fighting Measures
Standard extinguishing equipment, water, foam, A, B or C fire extinguishers. Produces black smoke while burning, carbon particles. Use air respirator.
7.6 Waste Disposal
Product is not considered a hazardous waste. Abide by local laws and procedures.
7.7 Handling/Cutting
Wear masks and goggles when cutting or grinding. Cover exposed parts of the body. Wear gloves when moving or lifting. Use diamond tipped tools for cutting.
8.0 Product Warranty
25 Year Warranty. Details available on request.
Company Information Head Office UK
Dura Composites Ltd
Unit 14, Telford Road, Clacton-on-Sea Essex CO15 4LP United Kingdom Tel: +44 (0)1255 423601 Fax: +44 (0)1255 435426 www.duracomposites.com [email protected]
