But when you see "ACI 355.4-19 compliant" on a box of adhesive anchors, you know something important: This little chemical glue stick has been tortured with 2.5 million hammer blows of force, and it is ready for the real world.
If you have ever looked up at a glass curtain wall skyscraper or walked through a parking garage, you have trusted your safety to a small, often overlooked piece of hardware: a mechanical anchor. But not just any anchor. The one holding that heavy façade or life-safety railing is likely governed by a specific, rigorous standard— ACI 355.4-19 . What is it exactly? In the dry language of codes, ACI 355.4-19 is the American Concrete Institute’s approved standard for "Qualification of Post-Installed Adhesive Anchors in Concrete under Fatigue and Sustained Loading." aci 355.4-19 pdf
If you are designing a connection subject to wind or traffic vibration, do not spec ACI 355.2. Insist on ACI 355.4-19 . Your building will thank you in 20 years. But when you see "ACI 355
But in practical terms? It is the "extreme endurance test" for chemical anchors. The one holding that heavy façade or life-safety