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Safe SKP Safe glass packs

Safe SKP

SKP SAFE - group of insulating glass units involving the insulating glass units produced using safe glass.

Safe glass is laminated, tempered or reinforced glass.

When making design of windows and outside doors, the following should be taken into consideration:

  • purpose of use of the building premises and intensity of activity of their users, i.e. number of persons who can access glazing in critical areas and their activity;
  • resistance of glass against strokes and way of breakage;
  • measurement of glass in critical areas.

Glass safety is described by classes of glass resistance to strokes and type of breakage.

Glass properties and classes defining glass properties in accordance with LST EN 12600:

Glass property

Glass class

Remarks

Resistance to stroke 3, 2, 1 3 class glass - lowest resistance to strokes,
1 class - highest resistance to strokes.
Type of glass breakage A Glass breaks up into multiple different-sized sharp-edged pieces.
 This feature of glass breakage is typical of the ordinary glass
hardener thermally and chemically.
B Glass can crack or break, but glass pieces remain stuck to the film.
 This feature of glass breakage is typical of laminated glass covered
with films and wire grid.
C Glass breaks into multiple small pieces which are relatively harmless.
This feature of glass breakage is typical of thermally hardened glass.

The use of safety glass in Lithuania is regulated by Technical Regulations for Construction STR 2.05.20:2006 “Windows and outside doors”.

The following standards are used for classification of safety glass:

  • LST EN 12600:2003. Construction glass. Pendulum test. Method and classification of shock test for sheet glass. This standard defines resistance of glass against strokes and type of breakage. Classification is applied for laminated and tempered glass (see Table 1.1 and 1.2).
  • LST EN 356:2002. Construction glass. Protective window glass. Test of resistance against hand-stroke and classification. Glass classified according to this standard show the level of safety against break-in or fall. Only laminated glass is classified as safe according to this standard (see Table 2.1 and 2.2).

Glass classification according to EN 12600 Standard

Marking of laminated glass according to the classification by standard LST EN 12600:2003.

PVB laminated
glass code

PVB  film thickness, mm

Glass thickness,
mm

Class according to
EN 12600

33.1 0.38 6.4 2(B)2
44,1 0.38 8,4 2(B)2
55,1 0.38 10,4 1(B)1
33,2 0.76 6,8 1(B)1
44,2 0.76 8,8 1(B)1
44,4 1.52 9,5 1(B)1
44,6 2.28 10,3 1(B)1
55,2 0,76 10,8 1(B)1
66,2 0,76 12,8 1(B)1
88,2 0,76 16,8 1(B)1

Marking of tempered glass in accordance with the classification of standard LST EN 12600:2003.

Thickness of tempered
glass

Class according to
EN 12600

4 mm 1(C)2
6 mm 1(C)2
8 mm 1(C)2
10 mm 1(C)1
12 mm 1(C)1

Glass classification according to EN 356 standard

Marking of safety glass according to the classification by standard LST EN 356:2002.

PVB laminated
 glass code

Thickness,
(mm)

Weight
(kg/m²)

Class according to
EN 356

Height,
(mm)

Number of throws*

33.1 6.4 16 -    
33,2 6,8 16 P1A 1500 3
44,1 8,4 21 -    
44,2 8,8 21 P2A 3000 3
33,4 7,5 17 P4A 9000 3
44,4 9,5 22 P4A 9000 3
44,6 10,3 22 P5A 9000 3x3
66,6 13,5 32 P5A 9000 3x3

*Test with steel ball of 4.1 kg.

Data based on technical information of glass suppliers.

Marking of safety glass according to EN 356 Resistance against hand stroke (axe test).

Class according to
EN 356

Resistant to axe strokes

Thickness,
(mm)

Weight,
(kg/m²)

P6B 30-50 15 -:18 33 -: 42
P7B 51-70 ~ 23 ~ 53
P8B >70 28 -: 50 63 -:11