Construction scheduling and trade interfaces · Lesson 2 of 4

Construction scheduling and trade interfaces: materials, standards and design constraints

Specifications that name hand-offs, submittal review time, the pressure edge metal shares with roofing, layering order, and the AFS piece sizes and delivery rules a site calendar has to respect.

You will be able to: Identify where sequence, ownership and timing rules come from, and which specification, submittal, layering and AFS delivery constraints govern a flashing hand-off.

13 min · 12 slides · 10 questions

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Slide 1 of 12

Where the rules live

A flashing hand-off is governed by several kinds of document.

The contract’s specification sections say who coordinates what. A manufacturer’s instructions control its own product. OSHA sets safety rules. Building Science Corporation sheets are guidance, not code.

For profiles and details, see the current NRCA roofing manual and the SMACNA architectural sheet metal manual.

Sources

Section 07 60 00 Flashing and Sheet Metal, master specification (revised 01-01-21) - U.S. Department of Veterans Affairs, published by the Whole Building Design Guide (NIBS)
Common Flashing Details for All Climates, BSC Information Sheet 303 - Building Science Corporation, for the U.S. Department of Energy Building America program
Insight 067: Stuck on You (J. W. Lstiburek, April 2013) - Building Science Corporation

Glossary

Shop drawing: A drawing prepared by or for the contractor to show how multiple systems and interdisciplinary work will be integrated and coordinated, as a Veterans Affairs master specification defines it.
Product data: Catalog cuts, schedules, diagrams, performance charts, instructions and brochures that describe the size, appearance and other characteristics of a material or system.
Reglet: A slot in concrete or masonry that receives the upper edge of a flashing. A Veterans Affairs specification has the upper edge inserted into the reglet and held with lead wedges, then the joint filled with sealant.
Receiver: The part of a two-piece counterflashing that is set into or onto the wall; the counterflashing piece is inserted into it, as a Veterans Affairs specification describes the system.
Drainage plane: The layer of a wall that sheds water down and out. Flashings are needed wherever it ends or is interrupted, and the layers are lapped so the upper one sheds over the lower.
Wind uplift zone: A band of design pressure in a table of forces. In one Veterans Affairs table each zone lists a perimeter uplift, a corner uplift and an outward force, in pounds-force per square foot.