What does Juliet plan to do with the rope ladder in Act 3 Scene 2 of Romeo and Juliet?

In Act III, Scene 2, Juliet originally asks her Nurse to obtain "a cord" so that Romeo may climb this rope and enter her chambers in order to consummate their marriage; however, after she learns the tragic events involving Tybalt and Romeo, Juliet considers using the rope to commit suicide.

In this play of contrasts--life/death, love/hate, light/dark images--this scene from Act II certainly develops these motifs. For, as Juliet awaits the return of the Nurse...

In Act III, Scene 2, Juliet originally asks her Nurse to obtain "a cord" so that Romeo may climb this rope and enter her chambers in order to consummate their marriage; however, after she learns the tragic events involving Tybalt and Romeo, Juliet considers using the rope to commit suicide.

In this play of contrasts--life/death, love/hate, light/dark images--this scene from Act II certainly develops these motifs. For, as Juliet awaits the return of the Nurse she anticipates the "gentle night...black-browed night" that will provide Romeo the cover that he needs to climb the rope to her chambers where they will consummate their marriage, and by doing so, prevent their parents from having the marriage annulled. 

However, before the safety of night, the Nurse arrives with the tragic news of the death of Tybalt, Juliet's cousin, at the hands of Romeo, her husband. Having heard this disturbing report, Juliet addresses the now useless rope and tells it that she, too, is now useless. Whereas she hoped to lose her virginity and perhaps become a mother and bring forth new life, now she will die a virgin. And, she decides that she will use the rope to end her life:

Come, cords.—Come, Nurse. I’ll to my wedding bed.
And death, not Romeo, take my maidenhead! (3.2.137-138)

Hearing her despair, the Nurse tries to comfort Juliet; therefore, she tells Juliet that she knows where Romeo is hiding, and will go to Friar Laurence's cell and bring him to comfort Juliet. This cheers Juliet, who tells the Nurse,

Oh, find him! Give this ring to my true knight,
And bid him come to take his last farewell. (3.2.143-144)