Cuando se amarran las barras de refuerzo que están colocadas en los muros para que no se muevan las barras horizontales, el amarre que se usa normalmente es el _____.

a. amarre de resorte
b. amarre cuadrado

c. amarre envolvente y cua-
drado

d. amarre envolvente y de
resorte


Answer: D

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