The search for answers continues in the Jan. 15 collapse of a 1,500-ft-long cable-stayed bridge in a mountainous region of central Colombia, killing 10 construction workers and injuring several others.
If structural engineers have their way, building codes will take a historic leap forward in the next few years to allow higher-strength 80-ksi reinforcing steel, instead of 60 ksi, in reinforced concrete shear walls.