Architectural Flashing Supply
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Complex custom architectural metalwork · Lesson 3 of 4

Complex custom architectural metalwork: methods and worked application

A ten-step method for custom work, four worked examples (a cap checked against AFS's limits, a fascia that is too wide, and a 60 ft aluminum run), shop drawings, samples and mockups, and how the sign of a bend shows which way a fold turns.

You will be able to: Run a custom job through a ten-step documented method, recording assumptions, units and inspection points, and build the job packet.

11 min · 12 slides · 7 questions

All lessons in this module
Slide 1 of 12

The method in one picture

The ten steps: capture intent, field-verify, split into pieces and joints, choose metal and finish, plan movement, issue drawing and samples, fabricate, inspect, install, record.

Two gates stop a job before metal is cut: AFS's limits check, and an accepted mockup.

The ordering is the course's own, from what the specs ask for; it is not a code procedure.

The ten-step method with its two gatesA vertical flow of ten numbered steps and two decision diamonds. 1 capture the intent, 2 field-verify sizes, 3 split into pieces and joints, then the gate: within AFS limits? If no, return to step 3. 4 choose metal, gauge and finish, 5 plan movement, 6 shop drawing and samples, then the gate: mockup accepted? If no, return to step 4. 7 fabricate, 8 inspect to the drawing, 9 install and protect, 10 record and hand over.Ten steps, two gatesCapture the intent1Field-verify sizes2Split pieces, joints3WithinAFS limits?NoYesMetal, gauge, finish4Plan movement5Drawing and samples6Mockupaccepted?NoYesFabricate7Inspect to drawing8Install and protect9Record and hand over10Two gates stop a job before metalis cut: limits and mockup.

A vertical flow of ten numbered steps and two decision diamonds. 1 capture the intent, 2 field-verify sizes, 3 split into pieces and joints, then the gate: within AFS limits? If no, return to step 3. 4 choose metal, gauge and finish, 5 plan movement, 6 shop drawing and samples, then the gate: mockup accepted? If no, return to step 4. 7 fabricate, 8 inspect to the drawing, 9 install and protect, 10 record and hand over.

1
Capture the design intent from the specification and drawings
2
Field-verify the dimensions before shop fabrication
3
Split the job into pieces, joints and corners
4
Choose metal, thickness and finish
5
Plan movement joints and fixed points
6
Issue the shop drawing and samples
7
Fabricate to the approved drawing
8
Inspect against the drawing and the mockup
9
Install and protect the work
10
Record the checks and hand over
Two gates stop a custom job before metal is cut: the limits check and the mockup. The ordering is this course's own, arranged from what the specs ask for.

Sources

Videos for this lesson

What this video shows: A soldered lap seam for copper, recommended when the sheet is too thick for a flat lock seam or the shape prevents one. Copper only; it is not a statement of what AFS makes. This is another organization's method, not an AFS or UH requirement.

Video: Lap Seam, Soldered by Copper Development Association, on YouTube. Chosen from the video's published description.

Glossary

Hem allowance
The flat width a hem uses in the blank. In AFS's Blank Width an open hem is 2 x its fold length plus its gap, a smashed hem is 2 x its fold length; AFS's own code calls it a quoting simplification, not a bend-deduction calculation.
Pieces per run
How many lengths a run needs. Without a splice lap, the run divided by the piece length rounded up; AFS's maximum piece is 126 in.
Signed interior angle
The FlashDraft bend angle: its size is the included angle between the two legs (180 straight, 90 a right angle, 0 folded flat back) and its sign is the handedness of the fold.
Splice lap
The overlap where two lengths of a run join; each piece after the first gives up the lap to the joint in the piece-count formula.
Shop review
AFS's status for a profile it confirms before fabrication; the customer sees "AFS confirms this profile before fabrication."