Architectural Flashing Supply
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Writing Section 07 62 00 · Lesson 4 of 4

Writing Section 07 62 00: defects, verification and case study

Four defect patterns taken from real public sections, a published counterflashing case, the chain of checks from shop drawings to closeout, how to word acceptance of oil canning, and the fall protection that stays in force.

You will be able to: Find and correct typical defects in a flashing section (conflicts, repeats, floating references and pointers with no details), work a published coordination case, and set the checks that verify the work.

11 min · 12 slides · 7 questions

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Slide 1 of 12

A section that disagrees with itself

Gelfand 2.02.A says that in no case shall sheet metal be less than 20 gauge.

Gelfand 2.02.C.1 asks for galvanized sheet stock at 24 gauge minimum, and scuppers at 22 gauge.

A higher gauge number is a thinner sheet, so 24 gauge cannot meet a rule of nothing thinner than 20 gauge.

AFS's register lists 20 ga galvanized steel at 0.0396 in and 24 ga at 0.0276 in.

Sources

Glossary

Floating reference
A reference to a standard or manual with no edition year, such as "current edition", so the reader cannot tell which document is meant.
Counterflashing
Metal that laps down over the top of a base flashing to shed water. In a published case, authors would not treat a reglet receiver as counterflashing because it did not lap over the base flashing.
Oil canning
The Metal Construction Association's term for visible waviness in the flat areas of metal roofing and metal wall panels. MCA says no one can assure its total prevention.
Mockup
A built sample of typical conditions, checked and accepted before the work proceeds. The University of Houston asks for a mockup of typical sheet metal flashing conditions.