DURA GRATING - TECHNICAL SPECIFICATIONS - January · PDF fileDURA GRATING - TECHNICAL...

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/m (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
Specific Heat (kJ/kg oC 2.3 na

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
Size
Weight
(Kg/m2)
Panel Weight (Kg)
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
Size
Weight
(Kg/m2)
Panel Weight (Kg)
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
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
14
Point Load
397kg 99kg 69kg 44kg 37kg 25kg 17kg 8kg
UDL 1,118kg 334kg 194kg 99kg 42kg 24kg 12kg 5kg
22
Point Load
30
Point Load
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
22
Point Load
30
Point Load
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/m (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

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