Ralco Steels Private Limited

Design Built PEB/HR Steel structure for Industrial and Commercial Factories - Workshops - Where Houses - Cold store - Oil and Gas Industries - Cement and Steel plants.

Products and Services

Sheeting And Cladding

Sandwich panel

Rigid polyurethane foam, sandwiched by metal or flexible facings, is increasingly successful in meeting the requirements of the construction industry, emphasizing on cost effective system building and energy conversation. Their specific file of application covers the construction of industrial and commercial buildings, ware houses and cold storages, refrigerated transportation).

Polyurethanes are three dimensionally networked macro cellular thermosets as a result of a reaction between a multifunctional polyol and a multifunctional isocyamnate/MDI in the presence of a blowing agent and additives.

Sandwich panels offer a wide range of properties which are responsible for the increase demand of this unexcelled construction metal.

Ralco can supply sandwich panels in various thickness (35mm to 100mm), various facing combinations of pre painted steel and aluminium in thickness ranging from 0.25mm to 1.0mm and in different colors.

Single skin panel

Metal panels are one of the most attractive features of a metal building system, having contributed mightily for the growing popularity of Metal Building. Single skin panels used as roof and wall panels, interior roof and wall liners, partition panels, fascia panels, Soffit panels etc.

Ralco stocks different base metals for the panels as

* Bare Galvalume
* Pre painted Galvalume
* Pre painted & un painted Galvanized steel
* Pre painted & un painted Aluminum

SPECIFICATION SHEET FOR CURRUGATED ALUMINIUM

	ALLOY
	Aluminium alloy , used in the production profiled roof and wall cladding panels,is A-3105H16 for mill finish and H46 for pre-painted.

	MATERIAL PROPERTIES
	Yield strength – Min 140 Mpa
	Modules of elasticity – 69000 Mpa
	Coef. Of linear thermal expansion – 24^6*10 per deg.C

	DURABILITY
	When exposed to the atmosphere natural aluminium forms a thin layaer protective oxide coating on this surface. Thanks to this composition, the roofing element is adequality protected against corrosion under normal conditions of exposure to atmosphere conditions , especially in coastal and industrial area.

	FIRE
	Aluminium is classified as a non-combustible material , defined by BS 476: part : 1970. Roof coverings of aluminium alloy are rated EXT AA when tested in accordance with BS 476: Part 3: 1958

	COMBINING WITH OTHER MATERIAL

	These roof covering can come into direct contact with plastic, galvanized steel, high-grade and pre-painted steel and zinc sheets
	Direct contact with ordinary steel, coper, brass and lead should be avoided by introducting a continuous separating element such as a PVC tape of bitumen felt strips or alternatively, painted with zinc chromate or aluminium paint. This also applies to direct contact with mortar and concrete.

	Timber parts which come into contact with aluminium should be treated with impregnating agents which do not contain copper slats, mercury salts, phenol compounds or fluorine compounds.

	MILL FINISH
	This is the natural untreated surface of the metal as it leaves the mill.

	STUCCO EMBOSSED
	Stucco-embossed aluminium is mill finished aluminium. This is roller-embossed to produce an irregular raised pattern finish. The advantage of embossing is that direct reflections and sun glaze are diffused, without reduction in the total reflectivity.

	POLYESTER COLOUR–COATED
	An economical, long life coated, factory applied polyester on the exposed side, and a lacquer coating on the reverse side. This is available in RAL as well as BS colour shades. External side coated in 20-25 microns polyester and Internal side coated in 5-7 microns primer.

	PVF2 COLOUR-COATED
	Excellent U.V. resistant, long-life coating of 2 coats of factory applied PVF2 on the exposed side and a lacquer coating on the reverse side. Available in RAL as well as BS colour shades.

SPECIFICATION FOR CORRUGATED STEEL

	ALLOY
	The base material shall confirm to ASTM-A653 (Lock Forming Quality ) or structural quality ASTM-A446 Grade D (Yield strength of Mpa) subject to availability.

	FINISGHES
	The base steel material shall be hot dipped galvanized Zink coated thickness as per ASTM A525-G90 (Zinc coated 275/m2 total both sides ) subject to availability.

	AL-Zn COATED
	The base material shall be coated in AZ150 (a50/m2 of aluminium Zinc coated) confirming to ASTM A792 Grade 50B with minimum yield strength 345Mpa. This coating offers corrosion resistance.

	PAINT FINISHES
	(Applies for galvanized as well as Alu-Zinc)

	POLYESTER
	An economical long life coating . External side coated in 20-25 microns polyester and internal side coated in 5-7 microns primer.

	PVF2
	This coating has high resistance to fading due to excellent UV resistance. Availabile in BS and RAL color shades.

	PVC PLASTISOL
	This coating has excellent resistance to flaking and has good anti-fading properties. This coating used in a thickness of 200 microns.

Features

Equipped with modern technology

Economical -1,012/1.000 mm covering width

Any length , 14 meters width of 1.012 mm

Superb thermal insulation

Environment friendly

Cost efficient

Tough, reliable and guaranteed

High quality, light weight, and easy to install

Innovative manufacturing allows panels to be constructed to fit any dimension

Delivery is on time and budget

Polyurethane

Average Density : 35kg/M3 to 40Kg/M3

Thickness : 25mm to 100mm

PU THICKNESS	W/M2^oC
25mm	.76
35mm	.54
50mm	.38

HIGHLIGHTS FOR COMPOSITE PANELS

	Composite panels are produced using rigid Polyurethane/ Polyisocynerate with external and internal sheets in steel or aluminium of various thickness, coating and colors.

	OUTSTANDING INSULATING PROPERTIES
	Low thermal conductivity due to chemical structure of Polyurethane/PIR

	LOW DEAD LOAD
	Due to the combination of lightweight materials

	CAPABLE OF LONG SPANES
	Fully bonded panels allow even longer spanes

	PAINTED MATERIAL
	Available in a wide range of standard colours. Extensive choice RAL Colourcoat finishes and colours

	SIMPLE AND FAST ERECTION
	Factory injected panel (no assembling on site). Easy handling due to low weight

	MANFACTURED IN THE INDIA
	Precise production, accuracy and control. Considerable savings in transportation costs.

	THERMAL INSULATION
	Effective protection of the thermal insulation against interstitial condensation Thermal insulation efficiency of economically unmatched standards 25 mm to 150 mm depths.

	MATERIAL DELIVERY
	Dependable delivery dates – Due to speed of manufactured and delivery procedure

	INSULATED COMPOSITE PANEL
	GENERAL FEATURES
	MECHANICAL CHARACTERISTICS OF THE FOAM
	( At a density of 35- 37 kg/m3)

	Maximum tensile stress : kg – 4.00/cm²
	Compression resistance : kg – 2.00/cm²
	Sheer resistance : kg – 1.40/cm²
	Flame Spread Index : 25 & 20
	Smoke Develop rate : 450


	INSULATING CAPACITY
	Between 0.020 to 0.022 Kcal/2mh ˚C as a K value, The U- value for 35,50 & 100mm thick insulated panel, is as follows:
	For 35mm = 0.57 W/m^{2 o}C
	For 50mm = 0.4 W/M^{2 o}C
	For 100mm = 0.2 W/m^{2 o}C

	Water absorption of the foam
	After 24 Hours : 1.0% of volume

	Close cells
	93%

	Self Extinguishing type
	-As per ASTM D 169/68 norms