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Duratex® (Lip-braced boards) are a continous length of Duratex® standard board with unique lipped inter locking galvanised steel edge reinforcement, which together with adequate density (as per DIN - 1101) provides spans upto 3000 mm. -
Duratex® Range Of Roof decking has a unique combination of properties which provides designers with a versatile product for a wide variety of applications. It provides lightness with structural strangth and excellent thermal,acoustic and fire resisting characteristics,which with the clean interlocking steel edge profile lines and texture of its soffit, allows economics for example,by the omission of a suspended cieling. It is widely used for flat or pitched roofing for any type of building and is also suitable for floors,permanent shuttering partitions and exterior cladding.
Duratex® is an acceptable material under Building Regulatations and is manufactured to a density in excess of (BS-1105, 1972, DIN-1101, IS : 3308-1981)
The Duratex® range of roof decking combines lightness (weight approx. 28kg/m2) with strctural strength, good thermal and acoustic properties plus excellent fire-protection. Wood-wool board with lip-braced edge technology are very popular and widely used in building construction in most part of the world especially in Europe, Africa, South & North America and South East Asian, Countries.
Galvanised steel-channel of DurateX® lip-braced boards when adequately connected,are considered to provide lateral restraint to supporting beams.
Its inherent thermal properties satisfy many common requirements and will meet more stringent demands with little additional expense.
Duratex® lip-braced slabs are available in 50 and 75mm thickness and to any required lengths ranging as 1200, 1500, 1800, 2000, 2500 & 3000 mm. length, each slab is 600 mm wide with following tolerances. Length +0, -6mm, width +0, -4mm and thickness +0, -2mm.
Further, these slabs are available as normal textured and pre-screeded slabs. Pre-screeded slabs are used when slabs are laid to falls, the pre-screeded deck provides a base upon which to apply roof-finishes, thus elminating in-situ screeds, the normal thickness of the slab is not affected (approx. Weight is 5 kglm2• in addition to self weight.)
Long wood fibres of selected species stabilised by chemical impreganation both under temperatre and pressure and further mineralised are compressed to half of their thickness under pressure (19 tons/ft2) in a Band-Form-Hydrostatic machine.
Duratex® lip-braced boards are manufactured to receive the unique lipped edge reinforcement which is fitted under pressure, providing permanent bond, good alignement and ensuring even distribution of concentrated loads, the combination of adequate density plus an unbroken length of slabs provides the structural strength for spans upto 3000 mm.
These long span units provide a soffit of clean-lines, which when left exposed, is virtually maintenance free. In addition the surface provides high Acoustic-absorption.
Using the recommended spans, Duratex® range of roof deckings complies with loading requirement of BS-648:1964.
Duratex® Boards have been tested to the relevant parts of BS-476 and possess.
a) Good-Fire-Reisstance Rating when evaluated as per BS-476, (Part-8), 1972 180-834(1975), IS-3809(1979)
1. Hour for 50 mm pre-screeded)
2. Hours for 75mm pre-screeded when tested to : BS-476
b) Surface Spread of Flame (both sides of surfaces)
(Zero - achieved class-I when tested to : BS-476 (Part-7), 1971
c) Minimum Fire Propogation:
Highest rating Class '0' when tested to : BS-476.
C) Biological :
Resists dry rot and fungal growths and Is impervious to all forms of Vermine and termites.
|Natural||Pre - screeded|
|65%rh, 20°C,2%moisture content||0.065w/m°c||0.081w/m°c|
|65%rh; 20°C,8%moisture content||0.077w/m°c||0.087w/m°c|
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