Why is it important to keep threads clean when installing anchor bolts?

Keeping threads clean when installing anchor bolts is crucial because contaminants on the threads can lead to bonding issues with grout. When grout is used to secure the anchor bolts, it must adhere properly to both the bolt and the surrounding substrate. If debris, dirt, or rust is present on the threads, it can hinder this bonding process, resulting in reduced strength and stability of the anchor. A clean surface allows for optimal contact between the grout and the anchor bolt, ensuring that the loads are transferred effectively and the anchor functions as intended. Proper installation and the longevity of structural connections depend significantly on this clean interface.