Door & Window for Buildings Notes for AL Tech by Hafeel Sir

8/11/2019 Door & Window for Buildings Notes for AL Tech by Hafeel Sir

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By Eng.A.A.Hafeel Ahamed


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Door FrameTimber

Aluminium

Door SashTimber

Aluminium

Steel

Concrete

PVC

Fiber glass

Zinc Alumn

PVC

Fiber glass

Steel

Zinc Alumn

Glass


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Standard sizes available in the market. 2-3 x 6-9

2-9 x 6-9

3-6 x 6-9

Iron Mongery Fittings for Doors & windows

All hinges, fasteners ( Stays, rings, barrel bolts)

, , .

Dont use Iron

Ex:

Brass ( Rs. 100/= per pair)

Iron ( Rs. 50/= per pair)

QUALITY? LIFE TIME ?


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Door/Window frame fabricated from aluminium extrusions Mill finish ( without anodizing)

Minimum thickness of sections Doors 1.6mm

Windows 1.35mm

Partitions 1.2mm

After of anodizing

Silver (natural) Anodize

Bronze anodize

Powder coating (Any colour)

NB: Before installation of aluminium frame all plastering & floor finishingworks to be completed. ( Otherwise template to be used)


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12-15 micron Standered range used except in coastal area.

15-18 micron

18-25 micron

25-80 micron

60-80 micron powder coated.


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Shop fronts

Door Windows

Curtain walls

Partions

Miscellaneous


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Mill finish

Mill finish is the untreated surface of the metal i.e. as extruded. Onexposure to the atmosphere the mill finish extrusion acquires, as a natural

process a hard and adherent oxide film that protects the metal. The

appearance, however, changes with time, becoming duller depending on

the environment to which the metal is exposed.

Anodized finish Here the surface aluminium is converted to aluminium oxide by means of

an electrolytic process where the extrusion is made anode in an

electrolytic cell. A chemically clean surface is a basic requirement forsuccessful anodisation and so prior to the anodizing, the extrusion is

subjected to surface preparation Process.


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The anodizing process substitutes the naturally formed oxide film by a dense,chemically resistant artificial film which is many times the thickness of the film

that is produced naturally. Due to this, subsequent exposure of the extrusionto the atmosphere does not produce the change of appearance that occurswith mill finish extrusion.

The anodic film is transparent and therefore, the original surfaceappearance of the extrusion is retained after anodizing. This is known as the

Natural Anodizing finish. Further treatment of the anodized extrusion in certain specific chemical

solutions produces the colour anodized finish. Varying colours such as lightgrey and dark brown and black colours can be produced by controlling thevarious parameters of the colour anodizing process. Gold colour film isproduced by a separate chemical process.

The anodizing process increases the corrosion resistance of the material,increases adhesion of paints, permits subsequent plating processes andimproves the decorative appearance of the extrusion because of the lustrous

anodic film. In addition the anodic film provides electrical insulation, permitsapplication of photographic and lithographic emulsions, increases emissiveand abrasion resistance of the extrusions.


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High quality polyester powder is electrostatically coated on thesurface of an aluminium extrusion, and then heat treated tofrom a hard, cured surface.

Prior to coating, the aluminium extrusions are pretreated bydegreasing, etching and chromating. The usual coating thicknessis aroun microns. ow er coate extrusions o er exce entweathering and UV resistance and are recommended for use inharsh environments.

However unlike anodizing and electrocolouring. This process isan external application and extrusions should be protectedduring the fabrication and installation stage to prevent scrapingand chipping off the powder coated layer.


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FinishFinish Surface coatingSurface coating CoatingCoating

thicknessthickness(micron)(micron)

RecommendedRecommended

applicationsapplications

Mill finishedMill finished Not coated. AsNot coated. Asextrudedextrudedcondition.condition.

General purpose applicationsGeneral purpose applicationswhere aluminium white rustwhere aluminium white rustformation is not aformation is not aconsideration.consideration.

NaturalNaturalanodizedanodized

ProtectiveProtectivecoating ofcoating ofaluminium oxidealuminium oxideagainstagainst

Produced inProduced inthree gradesthree grades

1010--15 micron15 micron

1515--20micron20micron

Coating thickCoating thick

Coating thickness to be decidedCoating thickness to be decidedupon the severity of theupon the severity of theexposure to corrosiveexposure to corrosiveelements. However the 10elements. However the 10--1515

elementselementsColourColour natural,natural,typical oftypical ofaluminiumaluminium


micron grade is suitable formicron grade is suitable for

majority of application in Srimajority of application in SriLanka. The other higher micronLanka. The other higher microngrades are suitable forgrades are suitable forapplications with exposure toapplications with exposure tosea breeze excessive dust andsea breeze excessive dust andfumes.fumes.

ColourColouranodizedanodized

ProtectiveProtectivecoating ofcoating ofaluminium oxidealuminium oxideagainstagainst

environmentalenvironmentalColourColour--BronzeBronze

Produced inProduced inthree gradesthree grades

1010--15 micron15 micron



Coating thickness to be decidedCoating thickness to be decidedupon the severity of theupon the severity of theexposure to corrosiveexposure to corrosiveelements. However the 10elements. However the 10--1515micron grade is suitable formicron grade is suitable for

majority of application in Srimajority of application in SriLanka. The other higher micronLanka. The other higher micron


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ColourColour

coatedcoated

Polyester powderPolyester powdercoated highestcoated highestform of resistanceform of resistanceto environmentalto environmentalelements wearelements wearabrasion availableabrasion availablein a wide range ofin a wide range of

6060--8080 DecorativeDecorativecoating suitablecoating suitablefor most internalfor most internalor externalor externalapplicationsapplicationswhere a durablewhere a durableand protectiveand protective

eye ca c ngeye ca c ng

BS colours and inBS colours and inmatt or gloss. Thematt or gloss. Thepowders used forpowders used forcoating are leadcoating are lead --FreeFree

co our coa ng sco our coa ng s

required. Thoughrequired. Thoughagainst corrosion,against corrosion,ideal for placesideal for placeswith exposure towith exposure tosea breeze, rain,sea breeze, rain,dust, funes.dust, funes.

Suitable whenSuitable whenload free coatingload free coatingare specified.are specified.


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Timber window - Rs. 500 /ftRs. 500 /ft22

Timber door - Rs. 450 500 /ft2

Aluminium Window - Rs. 350Rs. 350 750 /ft750 /ft22 (if

increase by 20 %)

Aluminium Door - Rs. 250 1000 /ft2 (ifpowder coated priceincrease by 20 %)

Curtain wall - Rs. 600Rs. 600 15001500 /ft2

(Year2004)


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Documents

Door & Window for Buildings Notes for AL Tech by Hafeel Sir