Exploring the High-Performance Benefits of Laminated Glass

Versatile Building Material Provides Multiple Advantages
This course is no longer active
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Advertorial course provided by Solutia Inc. and Viracon
Indoor Environmental Quality Category

Daylight & Views

Intent Provide for the building occupants a connection between indoor spaces and the outdoors through the introduction of sunlight and views into the regularly occupied areas of the building.
Requirements

Credit 8.1 (1 point):Achieve a minimum Daylight Facor of 2 percent (excluding all direct sunlight penetration) in 75 percent of the space occupied for critical visual tasks, not including copy rooms, storage areas, mechanical plant rooms, laundry, and other low occupancy support areas.

Credit 8.2 (1 point): Direct line of sight to vision glazing from 90 percent of all regularly occupied spaces, not including copy rooms, storage areas, mechanical, laundry, and other low occupancy support areas.

Laminated Glass
Contributions
Used o achieve daylighting, laminated glass can be used with tinted, colored or patterned PVB laminates to reduce the need for artifical light, diffuse and disperse natural light and increase occupant productivity. The laminate also helps lower cooling costs and, by blocking more than 99 percent of harmful UV rays, prevents damage and deterioration to interior furnishings.
Materials and Resources Category

Typical Standards for Windborne Debris Impact Tests

Large Missile Impact Test

(for windows, doors, skylights, glazing and shutters between grade and 9m (30ft.) above grade)

Three identical test specimens.
Missile is 5 x 10 cm timber weighing 4kg (2in. x 4in.) timber weighing 9lbs.
Two impact points at 15m/sec (50ft./sec.): one at center, one and one within 15.2cm (6in.) of a corner.

All three speciments must survive impacts without penetration before proceeding to cyclic pressure loading.

Small Missile Impact Test

(for windows, doors, skylights, glazing and shutters above 9m (30ft.) above grade)

Three identical test specimens.
Missile is steal sphere weighing 2 gm (0.07 oz.).
30 small missile impacts at 40 m/sec (130 ft./sec):10 at center, 10 at near long edge, 10 near corner.

All three specimens must survive impacts without penetration before proceeding to cyclic pressure loading.

Cyclic Pressure

(applied to all three specimens following large or small missile impact tests; duration of each cycle is 1-3 seconds; all inward-acting pressure cycles are applied first, followed by outward-acting cycles)

Inward-Acting
Pressure
Outward-Acting
Pressure
Range
Cycles
Range
Cycles
0.2Pmax-0.5Pmax
3,500
0.3Pmax-1.0pmax
50
0.0Pmax-0.6Pmax
300
0.5Pmax-0.8Pmax
1,050
0.5Pmax-0.8Pmax
600
0.0Pmax-0.6Pmax
50
0.3Pmax-1.0Pmax
100
0.2Pmax-0.5Pmax
3,350
Pmax is design wind pressure (inward and outward) from the building code, based on an unbreached building envelope.
Pass/Fail Criteria All three specimens must survive the impacts as outlined for a specific standard. If no tear or crack longer then 12.7 cm (5in.), or no opening through which a 7.6 cm (3in.) sphere can pass, has formed in any of the three specimens upon completion of the pressure sycles, they are deemed to have passed the test. See specific test method, code protocol or specification for individual pass/fail criteria.
Materials and Resources Category

 

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Originally published in Architectural Record.
Originally published in March 2006

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