Here is a building core plan for showing the exit routes. In architecture, a core is a vertical space used for circulation and services. Evacuation plans are an essential part of building construction and architecture, working as a guide map for safe exit in case of a calamity or hazardous situation. Building Codes in all countries require the contractors or building developers to submit a well-defined evacuation plan. Learn more details from this plan, or try to make yours with ease.