Energy Glass Added Security

Additional Makeups — Hurricane and Tornado Impact

Hurricane and Tornado Impact Resistant

SAF-GLAS products consist of a variety of laminates that have passed large missile impact and cyclic wind pressure tests .Laminated glass is a multifunctional glazing material that can readily be used in several applications ranging from Residential to Commercial installations.

Scope Of Testing — Large Missile Impact Test

  • Consists of three 2"x 4" timbers weighing 9lbs. each and impacting at a speed of 50ft. per sec.
  • Two impacts per specimen, one at the center and one within 6" (152mm) of a corner.
  • All three specimens must pass, one substitute is permitted.

SBCCI SSTD 12

LARGE MISSLE IMPACT TEST: Height and grade up to and including 30.0 feet.

  • Impact Option 1: Three identical test specimens, each specimen is impacted twice. One at the center and one within 6" (152mm) of a corner.
  • Impact Option 2: Six test specimens, each impacted once. Three specimens at center, three specimens impacted within 6" (152 mm) of a corner.
  • Options 1 and 2 consists of a 2" x 4" Timber.
  • Weight and speed of the 2" x 4" Timber specific to wind speed:
    90 < wind speed = 100 4lb. (2kg) missile impacting at a speed of 40 ft. (12m)/sec
    100 < wind speed = 1108 4lb. (4kg) missile impacting at a speed of 40 ft. (12m)/sec
    Wind speed = 110 9 lb. (4kg) missile impacting at a speed of 50 ft. (12m)/sec
  • Impact Option 3-pendulum impact apparatus. Refer to test standard for impact criteria.
  • To past test no penetration is allowed in which a 3" (76 mm) diameter sphere can pass. (Impact Options 1-3)
  • The cyclic pressure loading test is not required when at one ply of the impact glass product does not beak during missile impact test and the material is designed to withstand the design wind pressure. (Impact Options 1-3)

SMALL MISSLE IMPACT TEST: Height above 30 feet (9m).

  • Three identical test specimens.
  • Test is conducted with steel balls each weighing 2 grams and impacting at a speed between 130 ft. per sec. and 132 ft. per sec.
  • Test consist of thirty small missile impacts: 110 at the center, 10 at the center/long dimension side, 10 at the corner
  • The specimen passes the impact test if/when no penetrations are created in which a 3" (76 mm) diameter sphere can pass through.
  • All three specimens must pass prior to proceeding to the cyclical pressure loading test.

NOTE: The cyclic pressure loading test is not required when at least one ply of the impacted glass make-up does not fracture during missile impact test and the ply is designed to withstand the design wind pressure.

CYCLIC WIND PRESSURE LOADING

SFBC and SBCCI

Test specimens passing the large and small missile impact test criteria move on to the cyclic wind pressure test.

Inward Acting Pressure Outward Acting Pressure
Range Number of Cycles
0.2 Pmax to 0.5 Pmax 3,500
0.0 Pmax to 0.6 Pmax 300
0.5 Pmax to 0.8 Pmax 600
0.3 Pmax to 1.0 Pmax 100
Range Number of Cycles
0.3 Pmax to 1.0 Pmax 50
0.5 Pmax to 0.8 Pmax 1,050
0.0 Pmax to 0.6 Pmax 50
0.2 Pmax to 0.5 Pmax 3,350

Pmax: Denotes the maximum design load allowed in accordance with ASCE 7-88. "Minimum Design Loads for Buildings and Other Structures."

Pass/Fail Criteria

SFBC - Dade County Addition: A particular system of construction shall be deemed to comply with this recommended practice if three test specimens reject the missile impacts without penetration and resist the cyclic pressure loading with no cracks forming which are longer than 5" and 1/16" wide through which air can pass.

SBCCI SSTD 12: The test specimens shall resist the missile impacts prescribed and resist the cyclical pressure loading with no cracks forming longer that 5" through which air can pass or with no opening through which a 3" diameter sphere can pass.