The "pride" of concrete
People say that concrete has "pride". Wrong! This "pride" comes from the steel that is inside the concrete in order to withstand forces that alone concrete cannot resist. This so-called "pride" also stems from the fact that when we design concrete structures we consider only half of its ultimate strength because we "fear" its sometime unpredictable behavior! In this sense if we plan to design structures in the way we do as in concrete then if we were using foam-stones they should also have "pride"...!

Steel is an industrialized product
Steel is an industrialized product in the "steel making" (rolling for example) process but also in the subsequent elaboration and treatment process at the steel fabrication factories. This practically gives the advantage that its quality can be checked in every phase on its way before erection in a construction site. In concrete, quality control checks are more complicated. In a construction site during concreting, speciments of concrete can be taken for laboratory quality control checks. Specimens are then tested approximately 30 days after concreting had took place in the construction site in order for concrete to obtain its almost ultimate strength. If laboratory concludes that the quality of concrete is poor then what? Normally the concrete of poor quality has to be broken down (destructed) in the construction site! But during these 30 days required for the quality control checks, one or even two or more floors may be concreted in the construction (for a typical building project). What happens then? Such problems do not exist in steel construction, because if something goes "wrong" there is a feasibility of replacement.

Concrete has no problem in fire
Wrong! Concrete has also problem if exposed in fire in a very "insidious (sneaky)" way because you cannot "see" if fire has effected it (if painted for example). When concrete is exposed to high temperatures, calcification takes place and concrete loses a proportion of its strength without being able to see this. If concrete is calcificated then it becomes like a detrited material and if you hammer it with a adze or a hammer then pieces will be choped off from the main mass of the structural conctere element (a column for example). What if an earthquake hits the structure and the owner rely just on the look of the face of concrete if it has passed a fire event? Contrarily when steel is exposed to high temperatures, it loses proportion of its strength and is visibly deformed. These deformations are visible to the naked eye and directly identifiable so the owner acts accordingly.

Consistency of plans and implementation in construction
In concrete structures, it is relatively easy of "aberrations" to happen between design plans and implementation in construction, because for the concreting, form-work is always required. So it is relatively easy to happen mistakes and more or less concrete can be poured to slabs or beams or walls or columns etc in the case of a faulty installed form-work. In steel structures such problems are almost absent because the potential of mistakes is minimized due to the fact that the steel structure is "cut and sewn" to the fabrication steel factory and errected to the construction site as it was analyzed and designed in the construction plans.