How and Why Laminated Glass Solutions Meet Expanding Hurricane Code Requirements
With hurricane-prone states adopting new building codes laminated glass with its many benefits takes on an increasingly critical role.
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Protection Zones − Large Missle Requirement |
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Level of protection |
Wind Rating (mph) |
Basic Protection |
Enhanced Protection |
Zone 1 |
110-119 |
C |
D |
Zone 2 |
120-129 (> 1 mile from coast) |
C |
D |
Zone 3 |
120 to 129 ( < mile) 130 to 139 |
D |
E |
Zone 4 |
> 140 |
D |
E |
Source: ASTM E 1996-06 |
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Missile Type and Speed for Basic and Enhanced Protection |
||
Missile Level |
Missile Type |
Missile Speed |
A |
2 gm steel ball |
130 ft/sec |
B |
2 lb. 2 x 4
|
50 ft/sec |
C |
4.5 lb. 2 x 4 |
40 ft/sec |
D |
9 lb. 2 x 4 |
50 ft/sec |
E |
9 lb. 2 x 4 |
80 ft/sec |
Source: ASTM E 1996-06 |
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In 2003, the ASTM E1996 Standard Specification for Performance of Exterior Windows, Curtain Walls, Doors, and Storm Shutters Impacted by Windborne Debris in Hurricanes was finalized. The specification created protection zones and additional missile types for users.
Specifiers seeking specific test requirements in the ASTM standards, must first identify the applicable wind rating for the site. This information is found in the American Society of Civil Engineering standard ASCE 7-98. Once the wind rating has been identified, the ASTM E1996 standard specifies the basic or enhanced protection requirements. In addition, the standard identifies the missile type and speed required for testing.
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Originally published in Architectural Record.
Originally published in December 2006
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