Structure (also known as clearspan) tents have become quite popular in recent years. They were first developed in Europe and used the metric system of measurement so you will sometimes see M (for meters) when reviewing our different size of tents. Upright legs are staked to the surface and aluminum overhead beams are connected to the uprights, the shell will resemble a building. Fabric is then run through channels in the beams to create the tent top.
Structure tents can be built into almost unlimited lengths so they are capable of housing very large events. Because of the materials involved, they have a higher rental rate than the other two types of tents. The engineering of structures makes them the most weather resistant of all tents so they should be a consideration if your tent is going to be up for a long period of time or if your area is prone to winds.