Question

When fastening a heavy item to brick, what is the most important step?

Answer 1

The most important step when fastening a heavy item to brick is to make sure that the brick is anchored to the main structure.

You can't just nail or glue something to bare brick, since attaching heavy objects to brick is more difficult than mounting on wood or drywall.

Since insufficient or small anchors may break and damage both the wall and any mounted objects, it is imperative that the correct anchors are used for heavy objects

Answer 2

the answer would be: Make sure the brick is anchored to the main structure
Heavy items have the most risk to destroy the very foundation on the bricks that we already built. To prevent his, we need to make sure the main structure of our brick building is really solid so the upper part of the structure would not crumble when we put the item.