There are many different ways in which people carry things. This is reflected in the diversity of Indus symbols related to porters.
For image credits, please see below.
Image Credits:
Indus Script Signs with Numbers: Sign List of the Indus Script: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.
Indus Script Signs without Numbers: Lynn Fawcett, 2017 - 2018.