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The exercise asks to determine the "out-of-gauge" grade of a cargo, which is loaded onto an **N17AK flat car**.

### Given:
- Cargo dimensions:
  - Length: 13 m
  - Width: 3.18 m
  - Height: 2.65 m
  - Weight: 55 tons (55t)
  
- **N17AK flat car**:
  - Floor height: 1211 mm (1.211 m)
  - Length: 13 m

To determine the **out-of-gauge** grade, we need to compare the dimensions of the cargo, especially its height and width, to the loading gauge limits for the train. The loading gauge is the maximum height, width, and weight that can be safely transported by a rail car without exceeding legal or operational limits. 

Here, the cargo's height is 2.65 m and the flat car's floor is raised 1.211 m above the track. The total height when loaded becomes:

\[
\text{Total height} = 2.65 \, \text{m} + 1.211 \, \text{m} = 3.861 \, \text{m}
\]

The width of the cargo is 3.18 m, which may also be relevant in determining if the cargo is "out-of-gauge."

To finalize the grade, we'd need the **railway's maximum loading gauge** or constraints for the **N17AK flat car**. If these limits are exceeded, the cargo will be classified as "out-of-gauge."

Do you have any specific gauge limits, or should I explain further about out-of-gauge calculations? 

Here are 5 relative questions:
1. What are the specific loading gauge limits for this rail system?
2. How do you calculate the width allowance for rail cars?
3. What is the purpose of determining the out-of-gauge grade?
4. How is the cargo's weight relevant to being out-of-gauge?
5. Are there any adjustments you can make to fit the cargo better?

**Tip:** Always verify the height limit for your cargo based on the rail network you're working with to ensure safety compliance.

A piece of even-weight cargo is 13m in length, 3.18m in width and 2.65m in height and it weighs 55t. Load the goods directly on a N17AK flat car. Determine the out-of-gauge grade of the goods.

This problem involves determining the out-of-gauge grade of a cargo loaded on an N17AK flat car. With dimensions of 13m length, 3.18m width, 2.65m height, and 55t weight, students will learn how to assess whether the cargo exceeds the allowed limits using mathematical measurements and comparison.

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