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Integrated master capstone · Lesson 4 of 4

Integrated master capstone: defects, verification and case study

Why the roof edge gets attention, how to diagnose a defect by load path, a constructed case with no invented measurements, and the closeout and warranty documents that keep the evidence.

You will be able to: Diagnose a plausible edge-metal defect by load path, choose corrective options, and document evidence through closeout and warranty review.

11 min · 12 slides · 8 questions

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Slide 1 of 12

Why the roof edge gets attention

SPRI's presentation cites an FM Global study of built-up roof losses in which 59% occurred because the roof perimeter failed (FM Global Approved Product News No. 2, 2005).

SPRI's own conclusion is that edge metal failure is a leading cause of roof failures. SPRI is a single-ply roofing industry body, so read that as its view.

The study covered built-up roofs only, and it is from 2005.

Sources

Glossary

Warranty tracking log
The log the contractor keeps for each warranty review in UFGS 01 78 00: date identified, description, affected system, responsible party, corrective action, status and date resolved.
Warranty management plan
The plan UFGS 01 78 00 requires, containing the actions and documents needed so the owner receives every warranty it is entitled to.
Pre-warranty conference
The meeting before contract completion where UFGS 01 78 00 has the contractor and the Contracting Officer agree how warranty defects will be reported and answered.
Delta E
The color-change measure UFGS 07 60 00's example finish warranty uses: fading of more than 5 Delta E units, tested under ASTM D2244, counts as deterioration.
Dissimilar metals
Two different metals in contact. UFGS 07 60 00 allows aluminum direct contact only with stainless steel, zinc or zinc coating and has other metals painted where they meet it.