Question

A bulk storage structure can be termed as shallow bin, if plane of rupture of stored material

• A. Meets opposite side of structure before it touches grain surface
• B. Doesn't exist
• C. Meets grain surface before it strikes opposite sides
• D. Runs along bottom of the structure

Hint:

Plane of rupture hits top surface first $\implies$ Shallow bin.
Plane of rupture hits opposite wall first $\implies$ Deep bin.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The geometric and structural distinction between a shallow bin and a deep bin depends on where the failure plane of rupture terminates.
Key Formula or Approach:
\[ \text{Shallow Bin Criterion: } h \le b \tan\left(45^\circ + \frac{\phi}{2}\right) \]

Step 2: Detailed Explanation:
According to Ketchum's definition in grain storage design:
- A bin is termed a shallow bin if the plane of rupture of the stored material starts at the bottom edge and meets the free grain surface before it intercepts the opposite wall.
- A bin is classified as a deep bin (silo) if the plane of rupture strikes the opposite vertical wall before reaching the top free grain surface.

Step 3: Final Answer:
Thus, a structure is a shallow bin if the plane of rupture meets the grain surface before it strikes opposite sides, matching option (C).