Crews talk about pulling a destruct or waiting on destructs, meaning the seam samples cut out for peel and shear testing. The sample is split three ways, with part tested on site, part sent to the lab and part archived. The hole left behind becomes a patch to weld and test.
Heard on the job
CQA marked a destruct at the end of seam 12, cut it and get it to the trailer for the tensiometer.
Also heard as
- destruct sample
- DS
- pull a destruct
Related terms
Destructive test
Testing seam samples cut from installed geomembrane in peel and shear to prove seam strength.
Coupon
Narrow strip cut across a seam sample for peel or shear testing, usually one inch wide.
Patch
Piece of geomembrane extrusion-welded over a hole, defect, destructive sample cut-out or failed seam section.
Tensiometer
Portable tensile tester used on site to pull geomembrane seam coupons in peel and shear.