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TECHNICAL INFORMATION
Technical information
248 |
GRP ladder and tray
Material
GRP (Glass Reinforced Polyester) has,
good stability to UV, great mechanical
strength and is 40% lighter than steel.
GRP is a non-conductive insulating
material, resistant to temperatures from
-800C to + 1400C and has excellent
resistance to fire and corrosion being
self-extinguishing and zero halogen.
Installation
Expansion/contraction
Bases come with
Fitting
• Secure base at centres of 1500mm
apart.
• Supports should be position at a
maximum of 300mm from the start
or finish of a run.
• Place the projecting lip of the next
base into previous base, maintaining
joint for expansion.
• Every junction fitting should have
accompanying support within
200mm.
• All bases and fittings must be fixed
laterally with 4mm clearance holes on
each side of support.
• Built-in, self-adjusting, interlocking
couplers automatically provide
an expansion joint for thermal
movement.
• Can be drilled with standard power
tools.
• When cutting by hand, a tungsten,
carbide-tipped, heavy duty cross-cut
saw is recommended.
• Power disc cutting equipment makes
this task easier but should be done in
an open air environment.
Bend radius control
Hot press moulded technique of
manufacture permits the forming of
3000mm base/covers and a large range
of fittings with various bend radius
controls.
Covers
Covers should overlap the base joint
by at least 300mm to ensure maximum
strength. Secure to the base by four
clips, two required at 50-100mm from
each end.
Loading characteristics
• Defection <5mm (1/300).
• Coefficient of safety >1.7 (in
accordance with IEC 61537) using
the interlocking and self-adjustable
coupling without fasteners.
• Loading diagram details (below) in
accordance with IEC 61537, at an
ambient temperature of 25°C.
Approvals
Mechanical Behaviour
• Breaking point to NEMA FG1
• Tensile strength at break point
to ISO 527-5
• Modulus of elasticity to ISO 527-5
• Accelerated ageing to ISO 4892-2
Electrical behaviour
• Surface resistivity to IEC 6079-0
• Breakage voltage to IEC 60243-1
• Comparative tracking index
IEC 60112
Density to DIN 53479
• Linear Thermal Dilatation to
DIN 53752
• Water Absorption to ISO 62
Fire Behaviour
• Inflammability to IEC 60695-2-12/
UL94
• Spread of flame to BS 476 part 7
class 2/ ASTM E84 (Up to Class 1 on
request)
• Fire propagation to BS 476 Part 6
• Smoke emissions to BS 6853 App B53
• Fire standard to DIN 4102
8mm
L=1500mm
300mm = L/5
Male
Male
Male Female
Female
Bolt
Bolt
Bolt
Bolt
Positioning couplings without screwing junctions
GRP ladder and tray