TENSION STRUCTURES

The basic types of tension structures are cable domes, mast supported, arch supported, riadial tent and saddle roofs. The distinction between roof and wall is indistinct. Tension structures can economically span large distances without internal obstructions without the need for any mechanical systems. Architecturally, theses structures are more pleasing since there are many different and dynamic shapes that can be built. The main drawback of tension structures is that feasibally a computer must be used since the shape is governed by complex differential equations.

STRUCTURAL PRINCIPALS

Tension structures consists of cables and fabric in tension. The cables carry the gravity loads while stability and resistance to wind uplift is provided by the weight of the roof deck system. The most common type, the cable dome, consists of a center tension ring surronded by a number of hoop rings which are also in tension, these are surrounded at the perimeter by a compression ring.