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There are two main types of structure: shell structures and frame structures. Shell structures are made from sheet material, while frame structures are made from pieces called members. Horizontal members are known as beams, vertical members as columns or pillars. The two main forces that act on members are tensile forces and compression forces. Members that are in tension are called ties, while members that are under compression are called struts. Frame structures can be made in many shapes, but the triangle is the strongest and triangulation is therefore a common approach to designing structures.
A condor, poised to attack enemies, protects the nation under its wings. Blue symbolizes independence from Spain. Yellow recalls the Federation of Greater Colombia. Red stands for courage. Effective date: 7 November 1900.
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