The Hercules Airseal Vault

  • 64 cross rib structural supports
  • 12 counter cross ribbing supports
  • High-density water-resistant polypropylene
  • A consistent .250 wall thickness
  • A 180 degree reinforced channeled edge 
  • Nesting and stacking capabilities for convenient storage
  • A 100-year warranty
  • Able to be used in double-depth burials

The Strength Test:

Customer submitted one (1) sample for testing.  The sample arrived at CRT on 02/05/2007 via customer delivery.  Visual inspection was performed on 02/05/2007 and no product defects or shipping discrepancies were noted.  Sample submitted to identify compressive strength.  Testing to be performed per customer requirements and signed CRT quotation dated 01/24/2007.  The following additional information is provided: 

    CRT Order Entry Log Date: 01/29/2007
    Sample Description:  Hercules Vault

    Specification:  Customer Requirements:  Minimum 5000 lbs for 5 minutes

    TEST PROCEDURE:  The chamber was placed in a test frame.  A customer supplied base was used for bottom
    support.  Eight (8) 50-lb bags of 3/8-5/8 smooth river rock were placed on top of the vault to distribute load.  A
    6"x6" H-beam was placed on top of the rock bags to apply the load.  Load was applied using a 20-ton hydraulic
    jack and monitored using a Sensotek load cell.  The required load was held for 5 minutes and then incrementally
    increased until failure.

Load Obtained Time Ultimate Load
2270 kg 5 minutes 4040 kg (8900 lbs)

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