The contract documents show the finished result. The contractor decides how to get there and is responsible for that choice, including site safety.
Example: the drawings show a scoreboard high on a gym wall. They do not say how to lift it. The installer decides between a lift and scaffold and prices that choice.
The drawings will not show your means and methods, so your estimate must add them. Think through access, hoisting, sequence and protection of finished work. Visit the site or attend the pre-bid meeting if you can.