CFTs constitute a composite column that offers the best of both worlds- a pillar strong enough to withstand compression and supple enough to resist flexing; the outer steel tube provides the feistiness, while the inner concrete core provides ensuing tensile strength. This harmonious arrangement makes CFTs an ideal choice for use in behaviorally unpredictable conditions such as earthquakes.
In the 1970s, Japan stepped up to meet the demand for a dependable structure that could weather both seismic and windy conditions. As a result, CFTs -columns that have since been utilized in various settings such as office structures, railway crossings, and parking facilities- were born.
When compared to its counterparts, CFTs have an array of advantages, leading the way with its remarkable strength-to-weight ratio, remarkable resilience to compression and tension, and budget-friendly cost. Furthermore, CFTs simplify fabrication and installation procedures, not to mention its superior fire rating.
Though CFTs can be beneficial in certain circumstances, there are some drawbacks to using them in certain applications. These columns are more susceptible to corrosion compared to other types, as well as more difficult for people to find given their relative scarcity. Moreover, most building codes won’t accept CFTs as a viable option in the way other kinds of columns are.
Whilst CFTs may have some drawbacks, the weight of evidence indicates that there are a considerable number of perks which make them a viable option across many projects.