Are carriage bolts allowed in deck construction?

Carriage bolts are allowed for the majority of uses if they are of the appropriate size and coating, and have carriage bolt washers under the head of the bolt.    However, we cannot accept them when they are the only support method for a structural member unless approved by an engineer. 

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1. Are carriage bolts allowed in deck construction?
2. Final inspection floor covering requirements?
3. What is the current permit review time?
4. Are inspections currently being performed on site?