High Cubes Are the Smart Choice. Spoiler. Why? Keep reading... Going through the City of Houston permitting process for a container bar gave us a front-row seat to how quickly the “simple” idea of using a shipping container can get complicated. Containers are efficient, modular, and cost-effective — but once you’re navigating IECC energy performance , IBC interior height rules , and ComCheck , you realize how tight the margins actually are. We got ours approved — but it took