Technical details about strength , density , hardness, elasticity , environmental aspects , fire resistance of Marmox manhole covers

TECHNICAL SPECIFICATION OF MARMOX MATERIAL

PROPERTY	MEASUREMENT METHOD	VALUES	UNIT
Density	DIN 53472	2.45 (±5%)	g/cm3
Bending Strength	DIN 1164	300 (±5%)	kg/cm2
Compressive Strength	DIN 1164	1150 (±5%)	kg/cm3
Tensile Strength	DIN 53455	150 (±5%)	kg/cm2
Modulus of Elasticity	DIN 53457	2.5 x 105	kg/cm2
Surface Hardness	DIN 53505	≤ 80
Linear Thermal Coefficient of Expansion	VDE 0304/1	1.5 x 10-5 / 1° C
Water Absorption	DIN 53495	größer als 0.1%
Chemical Resistance		Highly Resistant
Environmental Aspects		Environmentally Friendly
Fire Resistance	DIN 4102	Fire Resistant (A2)

CLASSES OF MARAMOX MANHOLE COVERS

GROUP	MIN. CLASS	PLACE OF INSTALLATION
1	A-15	Areas which can only be used by pedestrians and pedal cyclists
2	B-125	Footways, pedestrian areas and comparable areas,c ar parks or car parking decks
3	C-250	For gully tops installed in the area of curbside channels of roads which when measured from the curbside, extends a maximum of 0.5m into the c arriage way and a maximum of 0.2m into the footway
4	D-400	Carriage ways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles
5	E-600	Areas imposing high wheel roads, e.g. decks, aircraft
6	F-900	Areas imposing particularly high wheel loads, e.g. aircraft pavements