Estimating a load's approximate weight is always an important part of any rigger's checklist and must be done before choosing the rigging system.
Have some fun and estimate the weight of the storage tank and its attached field stand below. To help you in your calculations we have provided Panel 6 of ITI Bookstore's Journeyman Rigger's Reference Card, which details weights of various materials and quick estimation formulas. Answers can be found below.
Journeyman Rigger's Reference Card - Panel 6