ngp section 18

7/27/2019 NGP Section 18

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Storm and cyclone resistance glass has beendesigned and tested to reduce the devastating

eects o extreme winds and ying debris that

impact upon people and buildings. Ordinary

glass & window rames can ail under these

extreme wind pressures and airborne projectiles.

It must be noted that this glass may still break

upon impact, but will prevent penetration o an

object into the building. The glass should be an

integral part o the raming system designed to

prevent the rame and glass rom blowing in orout when impacted.

Security glazing can be broadly defned as

products and systems designed to protect

people and property. Security glazing in the

case o criminal actions should be considered

as just one component in the overall security

system. Factors aecting which level o security

glazing to choose include police response time,

protection o people, protection o goods andthe availability o other orms o security such

as alarms and electronic surveillance.

stormandsecurity

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cyclone/storm resistantglass

A range o products are now available that have been tested

to withstand extreme wind pressures and penetration o

objects when subjected to impact rom objects. i.e., 4kg, 50mm

x 100mm timber piece on its end, traveling at 15metres per

second. These products use either conventional or specially

ormulated interlayers.

It must be noted that this glass may still break upon impact,

but will prevent penetration o the object. The glass should be

an integral part o the raming system designed to prevent the

rame and glass rom blowing in or out when impacted.

stormguard

Grade A laminated saety glass specically designed or

buildings in Australia or the South Pacic cyclone prone regions

described by both AS/NZS1170.2 or wherever buildings require

protection rom strong winds and airborne debris. Available in

thicknesses o 12.28mm 13.88mm laminated. This glass needs

to be incorporated into a window rame capable o retaining

the glass in positive and negative wind cycles.

stormshield

Incorporating a specially ormulated polyacrylic laminate,

StormShield is a Grade A saety glass designed to resist

penetration rom fying debris and excessive wind speeds.

Available in a thicknesses 7.88, 9.88, 11.88 and 13.88mm. The

glass should be an integral part o the raming system designed

to prevent the rame and glass rom blowing in or out when

impacted.


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storm shutters

The cost associated with cyclone resistant glass may initially

deter the building owner. Thereore, an option could be to use

storm shutters. However, the use o storm shutters presents

some new problems. First o all the area o the glazing may be

too large or dicult or xing o shutters (i.e. large commercial

building) and may secondly detract rom the appearance o thebuilding. Thirdly, storm protection is reliant on people deploying

the shutters in time. A cyclone may be easier to track and

predict rather than a one o storm which may catch people by

surprise, not giving them enough time to deploy shutters. Last

o all, shutters must be periodically maintained to ensure they

work when the time is needed. Cyclone resistant glass has the

benets o being ready at any time and not drastically altering

the appearance o the building.

SGP laminated glass

DuPont SentryGlas Plus (SGP) interlayer is the latest in a

long line o products oered by DuPont or use in laminated

saety glass. In response to architectural and transportation

industry demands or tougher window systems with glass on

both the inner and outer suraces, DuPont has introduced SGP

ionoplast interlayer. In properly designed window systems, this

technology has passed demanding hurricane protection codes in

Southern Florida. It also oers improved ballistic protection or

thinner constructions than are now possible with conventional

laminated glass. SGP oers ve times the tear strength and 100

times the rigidity o conventional PVB laminated glass interlayer.

features and applications

SGP laminates oer extended unctionality versus laminates

with traditional interlayers and makes them very suitable or

the applications where the ollowing eatures are required:

0 Stronger laminates, particularly when bending stress state

is dominant

In 2-sided/1-sided support conditions

In point-support congurations

In high aspect ratio (>1.5) plates with 4-side support;

0 Lower defection;

0 High tear strength;

0 High stiness;

0 Low creep;

0 Impact and structural perormance over a wide

temperature range;

0 Superior post-glass breakage properties;

0 Improved edge stability over standard PVBs;

0 High Clarity;

0 Low optical distortion (in some cases SGP can eliminate the

need to use toughened or heat strengthened glass).

interlayers and thicknesses

Available in clear only 1.52mm and 2.28mm ionoplast

interlayer thicknesses. For colours, a body tinted glass must be

incorporated in the make-up. SGP cannot be laminated with

conventional PVB interlayer.

sizes

0 Maximum SGP interlayer size 3000mm x 1800mm.

edge stability anddelamination

SGP laminates are displaying excellent weathering perormance.

Ater more than 7 years o natural weathering in Florida, USA

no deects were observed in the laminated glass samples and

along the edges. Tests with neutral cure structural silicone

sealants have also revealed excellent perormance. This providesthe opportunity to use exposed edge laminated glass with less

concern o edge delamination.

30.56mm Cyclone resistant laminated Make-up 10mm Azuria toughened/2.28mm SGP/10mm clear toughened/2.28mm SGP/6mm EnergyAdvantage low-E (#4) toughened. Fletcher Construction American Samoa.Glazed by National Glass. Architect Lively Architects.


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table 18a: bullet resistance (AS2343 1997)

Measured velocity within 2.5 metres Minimum range Number

Classifcation Calibre Ammunition o target (metres per second) (metres) o strikes

G0 9mm Parrabellum Mk22 7.4 gram bullet 405 +/ 15 3 3

G1 357 Magnum 10.2 gram semi jacket sot point 450 +/ 15 3 3

G2 .44 Magnum 15.6 gram semi jacket sot point 480 +/ 15 3 3

R1 5.56mm M193 5.56mm 3.6 gram FMJ 980 +/ 15 10 3

R2 7.62mm NATO 9.3 gram FMJ 850 +/ 15 10 3

S0 12 Gauge (Full choke) 70mm case 32 gram SG shot 400 +/ 20 3 2

S1 12 Gauge (Full choke) 70mm case 28.5 gram solid slug 450 +/ 20 3 2

Note 1 Shot centres 100mm apart, orming a square or equilateral triangle, centred on the target panel.

Note 2 Special class shall be specied by the manuacturer and allows or oblique shots or elements that are not 420mm square etc.

G= resistant to hand gun attack.

R= resistant to rife attack.

S= resistant to shotgun attack.

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basic attack resistance

Laminated glass is available using a 1.52mm interlayer to

make a 6.52mm and 11.52mm laminated glass. These products

are ideal or situations where the noise generated by the

attack alerts neighbours or occupants. The thicker interlayer is

designed to signicantly increase the amount o time and eortrequired by the intruder to gain access through the glazing. This

serves to dissuade and thwart would be intruders or burglars.

security glazing systems

intruder resistantglazing systems

As covered by AS3555 Building elements Testing and rating

or intruder resistance, specic types o orced entry resistant

glazing systems have been developed to withstand physicalattack with common hand tools, axes, sledges and power tools

etc.

These systems utilise a multi-laminated glass which can include

polycarbonate and polymer sheets with PVB interlayers. These

products are supplied as a complete rame and glass unit.

The standard AS3555 evaluates the maximum size opening

allowed ater a number o minutes and by a level o attack.

This standard does not cover bullet resistant attack, but can be

manuactured to do so.

bullet resistantglazing systems

These systems consist o a complete rame and glass bullet

resistant unit. A multi-laminated glass which can include

polycarbonate and polymer sheets with PVB interlayers is

laminated together to various thicknesses according to the levelo protection required as per the seven classication levels in

AS2343 Bullet resistant panels and elements(reer Table 18a).

In common applications thicknesses vary rom 1965mm.

Bullet resistant glazing systems can also be manuactured to

meet AS3555 Building elements Testing and rating or intruder

resistance.

bomb and blast resistantglass

Bomb blast generates energy in all directions, not just at the

intended target. In many cases, people and buildings that are

not targeted suer injury and damage respectively. In act with

a small device, even buildings several hundred metres away

rom the targeted building suer glass breakage.

To resist the blast eect o a bomb, the complete window

assembly must withstand two specic assaults. Firstly the

blast wave, which expands in all directions rom the bomb as

it detonates and secondly the ragments rom the bomb case

or container, which may include nails, bolts, screws and other

pieces o metal.


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Laminated one way mirror Subject side view from outside ofmens restroom, lighting maximised to prevent see through.

Laminated one way mirror Observation side showing view out frominside of mens restroom looking out into the hotel bar and gaming area.

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privacy glass

Patterned glass may be an option in toilets and bathrooms.

However in act, they just obscure the object in view and

thereore are not the ideal orm o privacy glass. Tinted glass

and specialist products such as SuperGrey are very dark

in appearance and oer varying degrees o privacy duringdaylight. However, like all glass including refective glass, at

night time, when levels o illumination inside are much higher

than outside, the opposite will occur where an unobscured

view in will be oered. Indeed, the best solution may lie in

choosing a glass to suit your other intended glazing needs in

combination with a blind or curtain.

See also Venetian Mirror page 47, Security Laminated One Way Mirror

and Switchable Glass below.

security laminated one waymirror glass

National Glass stocks 6.38mm SS8 Grey laminated glass or

one way mirror applications. This glass is ideal or surveillance,

security and where discreet observation is required. A successul

application requires a brightly lit subject side and a darker

observation side with the correct use o lighting. Please reer to

the ollowing glazing guidelines when ordering:

0 Not suited or windows or outside applications;

0 Glaze the more refective surace to the subject side;

0 Lighting must be maximised on the subject side to a ratio

o 7:1 (see Diagram 18.1);

0 This lighting must not shine directly on the glass;0 Lighting in the observers room must be kept away rom the

glazing. Any windows, doorways etc in the observers room

that may emit light, must be prevented rom doing so;

0 Walls, foors and urnishings on observation side to be dark

and subdued colours;

diagram 18.1:one way mirror (6.38 SS8)

switchable glass

Windows normally allow you to see as well as to be seen.

However, sometimes it may be desirable to be shielded rom

prying eyes. Switchable glass oers you this privacy at the fick

o a switch. The unique technology allows it to be switched

rom an ordinary looking clear glass to a translucent glass,ensuring optimal vision control. All it takes is a simple electrical

switch, like turning the lights on.

features and applications

0 Glass that allows any transition between clear and opaque

in milliseconds with the fick o an electrical switch;

0 Improvement in user comort and privacy;

0 Protection o interior urniture and other valuable items

rom UV damage;

0 Saety and security;

0 Architectural windows, skylights, interior partitions etc.

observation side

Lighting minimised

Lighting maximisedto a ratio of 7:1

subject side

ngp section 18

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