Glass

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Types and Durability

Description

Glass (Curtain Walling)

 Expected Lifespan

(Years)

 Adjustment Factors
General
Heat soaked thermally toughened laminated glass to BS 952: Part 1 and BS EN 572 *

For acceptance criteria refer to ASTM C1172 and ANSI Z97.1 CPSC Standard 16 CFR 1201

 35+ 1st stage adjustment factor:

In industrial areas (heavy polluted): -15% of no. of years

In urban areas: -10% of no. of years

In suburban areas: no adjustment

2nd stage adjustment factor:

Within 20m from express way: -20% of no. of years

Within 20m from major arterial road: -10% of no. of years

Within 20m from light traffic road: – 5% of no. of years

Test certificate from approved local testing authority : +15% of no. of years
Heat soaked thermally toughened/thermally toughened body-tintedglass to BS 952: Part 1 and BS EN 572 *

For acceptance criteria refer to ASTM C1048 and more stringent requirements

 35+
Heat soaked thermally toughened reflective/thermally toughened opaque glass to BS 952: Part 1 and BS EN 572 *

For acceptance criteria refer to ASTM C1048

 35+
Laminated glass to BS 952: Part 1 and BS EN 572 **

For acceptance criteria refer to ASTM C1172 and ANSI Z97.1 CPSC Standard 16 CFR 1201

 35+
Thermally toughened glass to BS 952: Part 1 and BS EN 572*

For acceptance criteria refer to ASTM C1048

 35
Heat strengthened glass to BS 952: Part 1 and BS EN 572 **

For acceptance criteria refer to ASTM C1048

 35
Annealed glass to BS 952: Part 1 and BS EN 572

For acceptance criteria refer to ASTM C1036

 35
Glass not to BS 952: Part 1 and /or BS EN 572 < 35

Combination of adjustment factors (1st stage and 2nd stage) should be added to obtain the durability values. Refer to durability calculator.

Notes:

Local test:

* Test certificate from approved local testing authority with certification for impact, fragmentation, and surface compression measurement and boil test according to SS 341:2001.
** Test certificate from approved local testing authority with certification for impact and boil test according to SS 341:2001.

Insulating infill panels are available which consist of thermally toughened glass with a backing of insulating material, which is either adhered to the glass or retained in a box behind the glass. Unless gasket glazing to drained and ventilated systems, particular care must be taken to protect the PVB interlayer against water ingress. Prolonged contact with water can cause the interlayer to swell and ultimately lead to delamination.

Sealant used as glazing material must be compatible e.g. acid silicone must not be used with laminated glass.

All of the above types of glass except annealed glass are considered safety glass, and therefore shall comply with SS 341:2001 for legibly marked with the following:

  1. The name or registered trademark of the manufacturer or supplier
  2. The number of Singapore Standard, SS 341
  3. A letter or other code to indicate plant of manufacture or supply
  4. Grade A or B to indicate the grade of the material subject to impact test as seen in the table below.
  5. A number to indicate nominal thickness for standard glazing material in mm, or a number to indicate the minimum thickness for non-standard glazing material to the nearest tenth of a milimetre.
  6. A letter or word or combination thereof to indicate the type of glazing material used in the product.
Grade Drop height 200 mm nominal Drop height 300 mm to 1500 mm nominal Drop height greater than 1500 mm or by a center punch
A No requirement No breakage or breaks safely Breaks safely or deforms
B No breakage or breaks safely No breakage or breaks safely No requirement