If you are a student or researcher without a budget, UL occasionally offers "Proposed Standard" drafts for public review before a revision is finalized. These are free but are marked "Not for regulatory use." Check the UL Standards public review page quarterly.
To understand the PDF, you must first understand the rating levels. The "new" UL 752 standard maintains a hierarchy of 8 primary levels (Level 1 through Level 8), plus specific ratings for shotgun and handgun threats.
Here is the breakdown of current ratings:
| Level | Threat | Typical Ammunition | Application | | :--- | :--- | :--- | :--- | | Level 1 | Handgun | 9mm FMJ (124 gr) | Retail counters, low-risk convenience stores | | Level 2 | Handgun | .357 Magnum JSP (158 gr) | Banks, credit unions | | Level 3 | Handgun | .44 Magnum (240 gr) | Police substations | | Level 4 | Handgun | .30 Cal Carbine (110 gr) | High-risk commercial | | Level 5 | Rifle | 5.56mm (.223) M193 (55 gr) | School perimeters, data centers | | Level 6 | Rifle | 7.62mm (.308) FMJ (150 gr) | Government buildings | | Level 7 | Rifle | 5.56mm M855 (62 gr) | Military facilities | | Level 8 | Rifle | 7.62mm (.308) AP (Armor Piercing) | Embassies, high-threat intelligence | ul 752 standard pdf new
Note on Shotgun: The standard also includes a specific test for 12-gauge rifled slug and 00 buckshot, which often falls between Level 3 and Level 4 in stopping power.
UL standards are copyrighted documents. Distributing a free PDF of the current standard without a license is a violation of intellectual property law. Furthermore, using an unauthorized copy for a construction project opens you up to liability if the document is outdated or counterfeit.
To get the official new UL 752 standard PDF: If you are a student or researcher without
You cannot assume an installed window is still UL 752 compliant after 10 years. The standard includes requirements for retrofitting and maintenance. Use the PDF to write a quality control plan.
This is the most critical part of the search query. If you are on the internet looking for a free PDF of the UL 752 standard, you need to proceed with caution.
If you have an old version of the PDF, you must upgrade. The newest iterations of UL 752 have introduced three major changes: it is obsolete.
To understand the importance of the "new" PDF, you must know the levels. The current UL 752 standard outlines seven primary levels—not to be confused with the older Roman numeral system. Here is the official breakdown as of the latest revision:
| Level | Weapon Type | Caliber | Grain | Minimum Shots | | :--- | :--- | :--- | :--- | :--- | | Level 1 | Handgun | 9mm Full Metal Jacket (FMJ) | 124 gr | 3 | | Level 2 | Handgun | .357 Magnum JSP | 158 gr | 3 | | Level 3 | Handgun | .44 Magnum SWC | 240 gr | 3 | | Level 4 | Handgun | .30 Caliber Carbine FMJ | 110 gr | 3 | | Level 5 | Rifle | 5.56mm (.223) FMJ | 55 gr | 3 | | Level 6 | Rifle | 7.62mm (.308) FMJ | 150 gr | 3 | | Level 7 | Rifle | 5.56mm (M855 / "Green Tip") | 62 gr | 5 | | Level 8 | Rifle | 7.62mm (AK-47 / M43) | 147 gr | 5 |
Note: The "new" standard explicitly distinguishes between Level 5 (older M193 ball) and Level 7 (steel-core M855). If your PDF does not list Level 7 and Level 8, it is obsolete.