¿Cuál de las siguientes es una afirmación correcta con respecto a los pies?

a. Se colocan en posición horizontal debajo de la carga.
b. Alrededor del 10 % del peso de la carga debería aportar la tracción de la línea que se necesita.
c. Deben ser tan anchos como la carga.
d. Deben ser de 15 a 20 pies (4,5 a 6,1 metros) de largo y colocarse longitudinalmente debajo de la carga.


d. Deben ser de 15 a 20 pies (4,5 a 6,1 metros) de largo y colocarse longitudinalmente debajo de la carga.

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