Concrete blocks are used for Frame Tents when staking is not an option. Concrete blocks are NOT able to be used with a Pole Tent. 700 lb. concrete blocks are used for all Frame Tents with the exception of 10’x10’ and 10’x20’ Frame Tents which require 350 lb. concrete blocks instead. Number of concrete blocks are determined by the size of the tent. Concrete blocks must be doubled when sidewalls are added.