What is Required for UL752 Ballistic Testing?

What is required for UL 752 Ballistic Testing?
The official UL 752 testing procedure requires three (3) identical samples tested to the same level including Parts 1, 2, and 3 if applicable. The general sample size is 12 x 12 inches. For assemblies and special circumstances, the sample size may vary. Keep in mind that Close Focus Research can test to any custom plan including the number of test samples.

UL 752 Levels 1 through 3 and supplementary shotgun:

• UL 752 Part 1 = 3 samples (3 shots within a 4 inch triangle)
• UL 752 Part 2 = 3 samples (2 shots within 1.25 to 1.75 inches)
• UL 752 Part 3 = 3 samples (1 unsupported edge shot)

Note: For Parts 2 and 3 only, spalling of bullet-resisting material from the protected side of the sample is acceptable under these conditions. Bullet-resisting materials that are to be used in a fully-supported manner need not be subjected to the Part 3 unsupported edge shot test.

UL 752 Levels 4 and 5 and supplementary shotgun:

• UL 752 Part 1 = 3 samples (1 center shot)
• UL 752 Part 2 = 3 samples (1 unsupported edge shot)

Note: For Part 2 only, spalling of bullet-resisting material from the protected side of the sample is acceptable under this condition. Bullet-resisting materials that are to be used in a fully-supported manner need not be subjected to the Part 2 unsupported edge shot test.

UL 752 Levels 6 through 8:

• UL 752 Part 1 = 3 samples (5 shots within a 4.5 inch square)

UL 752 Levels 9 and 10:

• UL 752 Part 1 = 3 samples (1 center shot)

Example 1:
For an official UL 752 Level 3 (.44 Magnum 240 grain SWC), the plan would be as follows:

• UL 752 Level 3 Part 1 = 3 samples (3 shots within a 4 inch triangle)
• UL 752 Level 3 Part 2 = 3 samples (2 shots within 1.25 to 1.75 inches)
• UL 752 Level 3 Part 3 = 3 samples (Unsupported edge shot)

Note: For Parts 2 and 3 only, spalling of bullet-resisting material from the protected side of the sample is acceptable under these conditions. Bullet-resisting materials that are to be used in a fully-supported manner need not be subjected to the Part 3 unsupported edge shot test.

Example 2:
For an official UL 752 Level 8 (.30 cal. 7.62 NATO 150 grain FMJ), the plan would be as follows:

• UL 752 Level 8 = 3 samples (5 shots within a 4.5 inch square)

For more information about the requirements of the UL 752 standards, see the following page: Underwriters Laboratory UL 752 Ballistic Standards

Example of Test Samples
The following images are UL 752 Door Assembly samples. If you submit a Door Assembly, then the frame system must also be tested as shown below.