Patent Glazing.. Grp Presentation

8/2/2019 Patent Glazing.. Grp Presentation

1/33

Click to edit Master subtitle style

3/18/12

Patent glazing- Buildingconstruction

Nainesh Saidane Janki Venkataraman Yash Mehta ApurvaSurvarnaOmkar Nilekar Kartik Patel Preshita Shinde Aditi YadavVaishali Sahu Shail Bajaria Ravindra Swami Khyati DossaApurva Kapadia Surbhi Ostwal Mayuri Kandalgaonkar SiddhantlondheAnkit Suthar Jayesh Meher Zoya Qureshi Ajinkya Mane

TOPICS COVERED INCLUDE THE

FOLLOWING:

INTRODUCTIONHISTORY

TYPES OF PATENT GLAZINGDETAILS

CASE STUDYMARKET STUDY

SAFETYENERGY AND ENVIRONMENT

NAMES OF THEMANUFACTURERS


2/33


3/18/12

applications of this popular glazingsystem are found extensively in railwaystations, shopping malls, atria, schools,

canopies, conservatory roofs and northlight glazing.

It consists essentially of a series oflongitudinal supportingmembers (glazing bars), and an

infilling of glass or other suitablematerials.

Patent glazing bars are attached to and

supported upon suitable structuralsteel or timber members providedby other trades.

INTRODUCTIO

----WHAT IS PATENTGLAZING?


3/33

3/18/12


4/33

3/18/12

founded in 1902 and originated fromVictorian enterprise.

First, lead covered glazing bar wereused as they were low onmaintenance and cheap.

The lead bars were then replaced

by aluminium bars in the late 50s

These aluminium bars were in amill finished or untreated finishedstate.

In the late 60s finishing wasintroduced which included Anodizingand Powder coating on aluminiumbars.

HISTO


5/33

3/18/12

the first introduced leadbars

These are the aluminiumbars

HISTO


6/33

3/18/12

1.SINGLEGLAZING

2.DOUBLEGLAZING

TYPES OF PATENT


7/33

3/18/12

SUPPORTED

The Patent Glazing barssupport the self-weight ofthe system, stress causedby wind and snow loads.

These loads are transmittedto a secondary structure andthrough to the structuralframe. Such systems areused for canopies,northlights and large multi-pitched roofs such as atria

SELF SUPPORTED

This system can bridge a 6mgap, extend to any length, andsupport the self-weight of thesystem and stress caused bywind and snow loads.

These loads are transmitteddirectly to the structural framewithout the need for additionalsteel or timber supports.

Such systems are used forhipped antern and sky lights,rectangular, pyramid, octagonalor multi-faceted features.

TYPES OF PATENT


8/33

3/18/12

There are twobasic types of

glazing bars.Traditional bars:The load bearingstalk projectsto the outsideand theglazing/infillingis retained bywings or caps.

TYPES OF PATENT


9/33

3/18/12

Inverted bars: The load bearing stalk or boxsection projects to the inside and theglazing/infilling is retained by caps. Thermal

breaks can be incorporated in these bars.


10/33

3/18/12

Two edge systems:The glazing/infilling is

fully supported byglazing bars onlongitudinal edges only,at regular centres. Anytransverse edges ofpanes/sheets are

stepped and flashed

TYPES OF PATENT

Patent glazing is described in BS 5516by the number of edges on which theglazing/infilling is supported:


11/33

3/18/12

Four edgesystems:Theglazing/infilling is fullysupported byglazing bars on

longitudinal andtransverse edges permittinggreater flexibility inbar spacing. Where

used in roofing, fouredgesystems must providefor drainage of waterfrom transverseglazing bars

TYPES OF PATENT


12/33

3/18/12

FIXING DETAILSFixing to timber is directly through the channels atthe topof the glazing bars with two

No. 10 x 1.5 inch bright zinc plated wood screwsand a sliding shoe with wood screws at the bottomend.Fixing to metal is with M8 Single Hole Fixing Shoespositively fixed at the top andsliding at the bottom end.

Dissimilarmetals shouldbe isolated toavoid bi-metalliccorrosion

DETAILS


13/33

3/18/12

TYPICAL SECTIONTHROUGH PATENT

GLAZING SYSTEMIXING TO

STRUCTURALTIMBER RAILS

DETAILS


14/33

3/18/12

TYPICAL GLAZINGINFILL PANNELS

Vertical glazing can be fixed to

any supporting structure capable ofwithstanding the loads imposed.

Here a open area of verticalglazing has had added infill panelsof clear toughened safety glass

with bespoke stainless steel planartype fixings and brackets.

Extra steelwork matching theexisting structure was added toreduce the require glass panel

sizes.

DETAILS


15/33

3/18/12

DETALS OF TYPES OF GLAZINGBARS

Patent glazing is a form of securelyfixing glass panels using an aluminummetal extruded section, which isprofiled to a variety of sections andincluded neoprene gaskets andseals for a watertight fitting.The type of bar most suited for eachapplication depends on such things aslocation, effective span, glazingmaterial to be used etc.After extrusion sections are treatedwith a polyester powder coated finishwhich is available in a wide range ofBS or RAL colours.

DETAILS


16/33

3/18/12 DETAILS

TYPES OF SECTIONSOF BARS


17/33

3/18/12


18/33

3/18/12


19/33

3/18/12 DETAL OF SKY

FOLLY FARM STOWEY


20/33

3/18/12

FOLLY FARM, STOWEY

Contractor:Ken Biggs Contractors Ltd.

Architect:Apg Architects

System Used:Universal Architectural Aluminum Systems

CASE

Folly farm,Stowey,Pensford,

Bristol, United Kingdom

Description:Patent glazed roof withelectrically operated vents


21/33

3/18/12

The Aluminium Patent Glazing systemcombines the great inherent strength ofaluminium glazing bars with aninnovative variable pitch facility to allowany shape or configuration of roofglazing to be easily achieved.

The system is used as glazed canopies,roof lights and covered walkways

CASE


22/33

3/18/12

GLAZE TYPES:

Polycarbonate, PVC-U and acrylic arethe most commonly used plastics forpatent glazing.

Laminated glass:

toughened glass: Wired safety Glass:

MARKET


23/33

3/18/12

1.VIRTUALLY UNBREAKABLEThe structured sheet is economical and light in weight,yet is 10 times stonger than acrylic and 200 times

stronger than glass!

2.EASILY FABRICATED ON SITEthis Highly flexible polycarbonate multiwall sheet can beeasily cold formed and will not crack or splinter whenfabricated.

3.ANTI-DRIP/ANTI-FOG COATINGThis high tech discovery ensures that greenhousecondensation is carried away from the roofing so thatdroplets will not damage your nursery stock. Specialspecification and color can be custom-made.

Specification

1) Thickness4mm, 6mm, 8mm, 10mm(twin-wall),12mm,14mm,16mm(triple-wall)

2)WIDTH standard width is 2,100mm

3)LENGTH standard lenght is 5800mm &11800mm

4)COLOUR Clear, blue, green,opal,brown ect.

POLYCARBONATE

CORRUGATED PVC


24/33

3/18/12

CORRUGATED PVCSHEETS

FEATURES: Weatherableand durable

UV protection*Wide range of profilesLightweight and easy tohandleLow maintenance

Chemical resistanceExcellent fire performanceTHICKNESS: 0.8mm-3mmCOST:2m * 1 m 200rs

ACRYLIC FEATURES:

Ease of fabricationHigh optical clarity

Good scratch resistanceExcellent thermoforming

capabilitiesOutstanding weather ability

THICKNESS:2mm-10mm

COST:25rs/ft-70 rs/ft

SAMPLES


25/33

3/18/12

It is important not to confuse WiredSafety Glass with Wired Glass. The

former has thicker wire.

Wired Glass has been used since theend of the 19th century for overhead

glazing as the wires hold togetherany broken pieces of glassproviding a simillar, but not asefficient function as the PVBinterlayer on Laminated Glass.

Wired Safety Glass provides fireresistance, though care must betaken to ensure a suitable glazingsystem is also utilised to provide theWIRED SAFETY GLASS


26/33


3/18/12 aminated Glass

Laminated glass is a typeof safety glass that holdstogether when shattered.

In the event of breaking, it is heldin place by an interlayer,typically of polyvinylbutyral (PVB), between its two ormore layers of glass.

Standard Prices: For3 layered Glass ( 36-40 mm )COST: 2000 RS /sq.ft.


27/33

3/18/12 oughened Glass

Toughened or temperedglass is a type of safety

glass processed bycontrolled thermal or chemicaltreatments to increase itsstrength compared with normalglass.

Tempering creates balancedinternal stresses which causethe glass, when broken, tocrumble into small granular

chunks instead of splinteringinto jagged shards.

Standard Prices: (19 mm thick)

Rs. 700 per sq. ft.

SAFETY: it is important to ensure you specify the


28/33

3/18/12

SAFETY: it is important to ensure you specify thecorrect glass type in relation to the overall height of the

glazing above the floor level. The followingrecommendations apply:

Glazing Heightabove floor level

Suitable types for SingleGlazing

Suitable types forDouble Glazing

Upto 5 Metres Toughened, laminated orWired Glass

The inner pane must beToughened or Laminated.

The upper pane should beToughened in eitherinstance.

5 to 13 Metres Toughened glass not morethan 6mm thickand panes not larger than

3sq/m.Laminated or Wired Glass

The inner pane must beToughened or Laminated.The upper pane should

Toughened in eitherinstance.

Above 13 metres Laminated or wired glass The lower pane must beLaminated

1 ENERGY EFFICIENCY- Buildings with 15-20% roof light area are more


29/33

3/18/12 Energy and environment

1.ENERGY EFFICIENCY- Buildings with 15-20% roof light area are moreenergy efficient. Will cut energy use during day as natural daylight is receivedfrom the roof area .

2.SOLAR RADIATION-The inside of the building can heat up duringdaylight hours due to the sun. This is termed as solar heat gain. To reduce thiseffect, solar control glass can be adopted to reflect heat and reduce glare fromthe suns rays. This lessens the burden on air-conditioning systems thusreducing CO2 emissions

3.CONDENSATION-Elimination of condensation on patent glazing isimprobable, but its occurrence can be minimised by selection of appropriateglazing bars and glazing/infilling materials.-condensation will form above internal relative humidity figures of 30% onsingle glazing panes and 55% on standard double glazed units.

4.FIRE RESISTANCE-Traditional aluminium patent glazing systemshave negligible fire resistance.

5.STRUCTURAL CONSIDERATION- It is a cladding productnot intended to withstand loads imposed


30/33

3/18/12

The glazing must be tested so that it meetsthe acceptable standards of air leakageregulations. The current requirement for air-leakage is

7m3/hr per m2.Particular attention must be made to the

junctions and abutments with the building, asmore often, these are the most likely airleakage routes due to poor workmanshiprather than the system itself.Conducting tests is expected to be theresponsibility of the Main Contractor.Specifications for the same must be given.

Air leakageAir leakage can be defined as:The uncontrolled movement of air into and out of a building which is not

for the specific and planned purposeof exhausting stale air or bringing infresh airAir leakage should never beconsidered as acceptable naturalventilation because it cannot becontrolled or filtered, and will notprovide adequate or evenly-distributedventilation.

As well as the direct energy penalty imposedby air leakage, other associated problemsinclude: -

- Occupier discomfort because of

drafts.- Degradation of the building

fabric due tointerstitial condensation.

- Poor indoor air quality due to theingress of

fumes, dust, etc.- Inability to achieve required

pressureconditions in controlled

environments.- Difficulties in balancing air

handling systems.- Noise transfer through leakage

paths.

Heat loss


31/33

3/18/12

Heat loss

The glass predominantly determines thermalperformance of an installation, however the framemay conduct heat and bridge this insulation.

Unless the frame is thermally improved,condensation may occur as well as heat loss.

Double-glazed units are most effective intackling this heat loss phenomenon.

The maximum insulating efficiency of a standard

IGU (insulated glass unit) is determined by thethickness of the space containing the gas or vacuum.

Too little space between the panes of glass results inconductiveheat loss.

Too wide a gap results in convection current losses.

Typically, most sealed units achieve maximum insulatingvalues using a gas space of between 5/8 to 3/4 (16

19 mm).

A product known as Vacuum


32/33

3/18/12

A more practical alternative is toreplace air in the space with a heavygas that is more viscous thanoxygen and nitrogen, which reduceconvective heat transfer.These gases are used because theyare chemically inert, commerciallyavailable because of theirwidespread application in industryand have a higher density compared

to air.They have high costs; Argon is

A product known as VacuumInsulated Glass (VIG), orevacuated glazing, can be usedto drastically reduce heat lossdue

to convection and conduction. These VIG units have most ofthe air removed from thespace between the panes,

leaving a nearly-complete vacuum.


33/33

3/18/12

hutchins and green-Raven

architectural glazing

standard patent glazing co. Ltd.

londsdale

INDIAN MANUFASTURERS FOREIGN MANUFACTURERS:

Saint-goblinSC group

AIS glass

sahi Glass

bhatia glass

Patent Glazing.. Grp Presentation

Documents

Transcript of Patent Glazing.. Grp Presentation