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Legs
— classic legs are supports that are in contact with the ground only at certain points. There are usually four legs. One of the advantages of such supports is that they are easier to adjust to an uneven surface: three legs will contact the ground anyway, and an additional stand can be provided for the fourth. On the other hand, for the same weight of the structure, the legs have a smaller contact area than the arches and exert a higher pressure; because of this, on soft ground, the structure may sag, and on a delicate surface (for example, fragile paving slabs), the likelihood of damage to this coating increases. In addition, such supports are somewhat inferior to arcs in terms of strength and reliability.