Anchor bolts are used to anchor wood plates to the top of a masonry wall. Roof trusses will be secured to the plate. What is the minimum depth the anchor bolts must be imbedded into concrete tie beam?

Anchor bolts are used to anchor wood plates to the top of a masonry wall. Roof trusses will be secured to the plate. What is the minimum depth the anchor bolts must be imbedded into concrete tie beam?