How did the completion of the transcontinental railroad affect companies that made products?

Companies could ship goods cheaply.

Explanation:

On May 10, 1869, construction of the Transcontinental Railroad was completed (although the connection between the coasts was actually completed the following year). This established a transport network that would become central to the US economy, as this revolutionized transportation to the companies that manufactured products because these companies could transport their products at a lower price and with greater speed.

if you are talking about current time the answer is no

if you are talking about when the colonies were developing the answer is yes

the tallest building in the western hemisphere and the sixth tallest building in the world