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NCARB PDD Exam - Topic 2 Question 18 Discussion

For which of the following reasons is sheet piling used? (Check the three that apply)
D) An excessive slope on the sides of the excavation would be required. and E) The soil surrounding an excavation site will not support itself during or after the digging. and F) The excavation adjoins a property line and the adjacent property cannot be disturbed.
A) A grade beam needs support.
B) Raked shoring should be created.
C) A pile cap needs support.

NCARB PDD Exam - Topic 2 Question 18 Discussion

Actual exam question for NCARB's PDD exam
Question #: 18
Topic #: 2
[All PDD Questions]

For which of the following reasons is sheet piling used? (Check the three that apply)

Show Suggested Answer Hide Answer
Suggested Answer: D, E, F

Sheet piling is a type of earth retention system used in excavations to prevent soil collapse. Reasons include:

D . When the natural soil slope is too steep to remain stable, sheet piling acts as a vertical barrier.

E . When soil cannot support itself during excavation, sheet piles provide lateral support.

F . When excavation is adjacent to a property line or existing structure and adjacent soil must not be disturbed.

Options A (grade beam support), B (raked shoring), and C (pile cap support) are not typical or primary uses of sheet piling.


NCARB ARE 5.0 Review Manual, Site Design and Construction chapter

Geotechnical engineering and excavation support best practices

by Lucy at Jul 21, 2026, 11:03 PM

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Francisca
1 day ago
Yeah, E is a must if the soil is unstable!
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Roosevelt
6 days ago
I disagree, I don't see how D applies here.
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Felice
11 days ago
Wait, are we really using sheet piling for raked shoring?
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Lorriane
17 days ago
I think A and C are also valid.
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Merissa
22 days ago
Definitely E and F for sure!
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Jonell
27 days ago
I vaguely recall that sheet piling can also help with adjacent properties, so option F might be correct too, but I need to double-check my notes.
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Noel
1 month ago
I practiced a similar question where we discussed the importance of preventing soil collapse, so I feel confident about option E.
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Kimberely
1 month ago
I think options E and F are definitely reasons for using sheet piling, but I'm a bit unsure about the others.
upvoted 0 times
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Olga
1 month ago
I remember studying that sheet piling is often used to support excavations, but I'm not sure which options specifically apply here.
upvoted 0 times
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