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How does Preload work in ForneyVault?

ForneyVault includes an Auto Preload feature that calculates and adjusts preload automatically based on specimen data and prior test results.                                Preload is used to ensure the specimen is fully seated and the machine is applying load under controlled conditions before the test is measured.

How to use Preload

  1. At the machine, navigate to the Compression section
  2. Ensure the Preload checkbox is enabled

  3. Leave Auto Preload enabled for all tests where available

 

How Auto Preload is calculated

First specimen in a set

For specimens younger than 28 days:

  • Expected strength = 55% of 28-day design strength
  • Preload = 50% of expected strength

Example:

  • 28-day strength = 4,000 psi
  • Expected strength = 2,200 psi
  • Preload = 1,100 psi

Second specimen in the set

  • Preload = 50% of the actual strength of the first tested specimen

Third specimen and beyond

  • Preload = 50% of the average strength of previously tested specimens in the set

This allows preload to adjust to actual material performance during testing.

 

Summary

Preload determines when the test begins and when data is recorded.

Using Auto Preload ensures:

  • Proper specimen seating
  • Controlled loading at the start of the test
  • Consistent and repeatable results across all specimen types

 

Need Help?

If you have any questions or need assistance, our team is here to help.

Visit the support page to:

  • Submit a support request

  • Access additional resources

  • Get help from our team

ForneyVault Support