Kot Engenharia

High-strength bolts: design and installation

Introduction ABNT NBR 8800:2024 (Design of steel structures and composite steel and concrete structures for buildings) defines ASTM A325 and ISO class 8.8 bolts as high-strength bolts, and ASTM A490 and ISO 10.9 bolts as higher-strength bolts. As such, these bolts are commonly used in main connections of […]