horizontal load use and the cable retainers 28 36 are thus oriented as shown to best resist deflection caused by that load the resulting structure is able to better resist deflection under its designed load conditions as the tension applied to the cables relative to their associated sub structure stores strain energy in the resulting sub structure accordingly as forces are applied to structure the counter strain stored in the sub structure resists the application of that load the resulting structure can within certain boundaries accept load with reduced strain and thus has an increased load carrying capacity for a given deflection a 50 100 reduction in deflection can result compared to a similar sized existing structure the steel portal frame structures shown in fig2 12 each have their components and sub structures identified with like reference numerals to those used in fig1 however in each structure the cable retainers follow a different path compared to the columns and centre span so as to suit differing load conditions the structure 50 shown in fig2 is designed to resist upward and horizontal load conditions usage the structure 60 shown in fig3 is designed to resist downward and horizontal load conditions usage the structure 70 shown in fig4 is designed to resist upward and horizontal load conditions usage the structure 80 shown in fig5 is designed to resist.