Architectural Flashing Supply
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Major commercial project coordination · Lesson 2 of 4

Major commercial project coordination: materials, standards and design constraints

What a flashing section asks for, one owner's lengths, joint spacing and wind forces, how ES-1 proves an edge system, what AFS's folder can make, Drexel's published coping limits and the roof-to-wall interface.

You will be able to: Read a flashing section and the roof-edge standard chain, and list the owner, manufacturer and AFS limits that bind a fabricated scope, saying whose each value is.

14 min · 12 slides · 11 questions

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Slide 1 of 12

What a flashing section typically asks for

OGS asks for shop drawings with plans, elevations, sections and attachment details, expansion-joint locations, material, thickness and finish for each location, forming details, and the layout of fasteners, cleats and clips.

Shop-assembled and field-assembled work must be distinguished.

Expansion joint details show the direction of expansion and contraction from fixed points.

Sources

Glossary

Expansion joint
A joint that lets exposed flashing and trim move as the metal expands and contracts with temperature; OGS forms them of intermeshing hooked flanges at least 1 inch deep.
ES-1
The ANSI/SPRI/FM 4435/ES-1 test standard for low-slope perimeter edge metal such as copings and fascia, excluding gutters.
GT-1
The ANSI/SPRI GT-1 test standard for gutter systems, separate from ES-1 which excludes gutters.
Edge system
The perimeter edge metal of a low-slope roof, which SPRI lists as coping, fascia and gutter.
Girth
The total flat width of a formed piece, hems included. AFS's folder makes a girth up to 48 inches off a 48 inch sheet.