Exhibit_2_-_Crypts-101-Buried-Testing.pdf
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- Attached to
- Master Agreement AZ|CTR079530
- Contract number
- CTR079530
- Issued by
- Arizona
About this file
This document is a presentation titled "Buried Testing Crypts 101" developed by the National Cemetery Administration, specifically by Andrew J. Walters, PE, a Specialist in Cemetery Development & Improvement Service. The presentation provides comprehensive guidelines and best practices for conducting on-site buried testing of concrete crypts, which are burial structures used in veteran cemeteries. The document is intended for a wide range of attendees including NCA staff, cemetery administrators, inspection teams, contractors, subcontractors, and design representatives.
The presentation details critical procedures for testing buried crypts, including preparation, installation, loading, and inspection protocols. Key guidelines include placing test crypts on 6-inch drainrock, using pea gravel in gaps, backfilling in specific lift layers with precise compaction requirements, and careful loading with heavy equipment. The document emphasizes avoiding potential structural damage by preventing improper loading, excavation, or material placement near crypts. After testing, the presentation recommends discussing items such as crypt condition, signage, temporary fencing, crack assessment, repairs, lid numbering, and potential issues with grass installation and road construction near crypt fields. The overarching goal is to ensure the structural integrity and long-term performance of pre-placed concrete crypts in national veterans' cemeteries.
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On-site Buried Testing Crypts
June 24, 2021
Andrew J. Walters, PE Specialist, Cemetery Development & Improvement Service (41A2) National Cemetery Administration
Crypts 101 slides to date:
1. Overall
2. Inspection & Protection
3. On-site Buried Testing
4. Wall Repair
Buried Testing Crypts 101 Suggested Attendee List for witnessing on site NCA Crypt Specialist or his/her representative.
Cemetery Staff and Admin Staff.
Inspection Team (RE, COR or hired Inspectors) Contractor self-performing crypt install.
Specialized subcontractor hired for crypt install.
Subcontractors for Earthwork, Roads, Sod, Dust Control, etc.
Concrete Precast Plant representative for test load decision.
Design AE representative.
NCA District Engineers, SOs, PMs, COs, State Grants rep.
Local Press. Normal for Tribal Veteran Cemeteries.
Interested Veterans.
National Cemetery Administration
Pic of Maximum Load on two-wheel axle over crypts. EVER!
Hauls 2-1/2 yards of fill = 12,000-lbs axle weight.
In buried testing, get a wheel on all wall edges and over lids.
Testing failure is catastrophic per later slides.
Test crypts arriving on-site.
Two Perimeter Quads minimum.
Place test crypts on 6” drainrock. Configurations later slides.
Install pea gravel in 1” or 2” gaps. Never sand in gaps.
Backfill in lifts around test crypts to 95% std Proctor.
Backfill over lids in two 12” lifts to 85% std Proctor.
Do not use bucket for compaction EVER.
“Banging” bucket compaction over lid will collapse walls.
National Cemetery AdministrationYES
NO
On ground orange paint the location of buried test crypts.
Load with 2-wheel simulated 12,000-lb+ axle. (544K is 28,463 lbs.)
Or use Cemetery’s dumper. Run a wheel over every crypt wall.
Uncover lids ONLY, lift lid, test inside-shelf, remove shelf with tool.
Test failure from wheel load is catastrophic wall collapse!
Wall failure (below) caused by lateral load soil pressure.
Has never happened during 100+ buried crypt testings.
If happens, find out why, correct and redo buried test.
Hairline crack
Inspect walls & floor and for cement film over drainholes.
Cracks are caused by handling or bumpy truck ride.
Check 30” clear above casket rests.
Go over Items for Discussion. Then buried testing is DONE!
Casket rest
30” Clear inside walls
When DONE, leave testing site to avoid witnessing potential wall collapse from excavation of clayey soil sticking to walls or excavator error. If wall collapse seen, confidence is lost!
Just expose lids & lift. Do NOT dig up crypts during testing.
Use PPE to witness buried load testing.
Test Crypts Layout option Simplistic (and acceptable):
Test Crypts Layout option Comprehensive.
National Cemetery Administration
PERIMETER
QUAD
INTERIOR
QUAD
A typical rescue in saturated soils.
For wet-weather crypt buried testing with saturated soils, use drainrock for ALL backfill and approach roads.
Buried Testing Crypts 101
National Cemetery Administration
Keep fingers
AWAY!!!
Drainrock
Keep away from buried testing or risk wall collapse:
Keep away tall piles of material from crypts.
Piles over 6-ft same as wheel load over 12,000-lbs axle.
Items for Discussion after lids lifted:
PPC – PrePlaced Crypts
Protect PPC fields by install of signage & temp fencing for keeping heavy vehicles and tall piles 10-yards away.
Cracks in concrete crypts. Aesthetic or structural integrity.
Repairs of concrete crypts. Send pics to Crypt Specialist.
Extra lids, shelves, lifting devices to be left with Cemetery.
Use all 4 lid anchors to lift lids & paint #s. Shelf check.
Painting crypt lid #s. Paint inside-wall #s high. Verification.
Grass install uses heavy trucks, especially for “watering-in.”
Probe to verify fill depth over lids. Affects headstone setting.
Issues of road building adjacent to newly set PPC fields.
END
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File details come from the government source that posted it. Updated .