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NASA's structural standard sets what minimum ultimate design factor for metallic spaceflight structures?

1.4: parts must survive 1.4 times the largest load expected in service.

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  1. 1.4 ✔
  2. 4.0
  3. 10

Why: A design factor multiplies the limit load, the largest expected service load. NASA's table gives an ultimate design factor of 1.4 for metallic structures using either prototype or protoflight verification.

Huh, didn't know that: This standard excludes engines, rotating hardware, solid propellant, ground equipment and facilities.

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My factor of safety for leaving for the airport is 1.4. My spouse's is 4.
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References

Answer: 1.4. A design factor multiplies the limit load, the largest expected service load. NASA's table gives an ultimate design factor of 1.4 for metallic structures using either prototype or protoflight verification.

  1. NASA-STD-5001B w/Change 3, Structural Design and Test Factors for Spaceflight Hardware (Table 1) standards.nasa.gov/sites/default/files/standards/NASA/B-w/CHANGE-3/3/2022-10-24-NASA-STD-5001B-w-Change-3-Approved.pdf
    Minimum Design and Test Factors for Metallic Structures
    Checked 2026-10-11.
  2. NASA-STD-5001B w/Change 3 standards.nasa.gov/sites/default/files/standards/NASA/B-w/CHANGE-3/3/2022-10-24-NASA-STD-5001B-w-Change-3-Approved.pdf
    Limit Load: The maximum anticipated load, or combination of loads that a structure may experience during its design service life
    Checked 2026-10-11.
  3. NASA Standards: NASA-STD-5001 standards.nasa.gov/node/242
    Is Active? ACTIVE
    Checked 2026-10-11.

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