Normally Excavators are used for digging earth. But sometimes the operators use the bucket to lift materials .
Typically no. It's a matter of safety. The object being carried can spill out of the bucket and injure someone. For heavy loads you use a forklift and the objects should be securely held on a pallet. For odd shaped objects a sling may be used but it must be inspected for nicks and tears prior to every use.