shelf angle design-abaa...2017/05/03 · learning objectives 1. understand what is needed for...
TRANSCRIPT
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Air Barrier and shelf angle design,
detailing, and lessons learned
Corey S Zussman, AIA, NCARB, ALA, REWC, RWC, RRO,
CDT, CQM, LEED® AP BD+C
Pepper Construction Company
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Air Barrier Association of America (ABAA) is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.
This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.
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Air Barrier and shelf angle design, detailing, and lessons learned
Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.
This course is registered with AIACES for continuing professional education. As such, it does not include content that may be
deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of
handling, using, distributing, or dealing in any material or product._______________________________________
Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
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Course Description
There are many different ways to design and install a shelf angle. The design of the shelf angle should be integrated with the air barrier continuity in the early stages of the building design. The team must collaborate with the structural engineer and design a system that
will work with the exterior sheathing, CMU, or other substrates, and the air barrier installation. Detailing the shelf angle with an understanding of the installation as a whole, making sure that the air barrier system has continuity, constructability, and good detailing
practices will facilitate a successful installation.
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Learning Objectives
1. Understand what is needed for proper detailing for an air barrier installation and shelf angle design.
2. Review several different types of shelf angle designs and what the pitfalls are with Each shelf angle type.
3. Identify and understand how the shelf angle could be installed to accommodate the Air barrier detailing and prevent constructability issues before construction.
4. Learn how to review the shelf angle in preconstruction to make the installation of the air barrier constructible and continuous on the elevation.
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Air Barrier and shelf angle design, detailing, and lessons learned :
Preplanning & Design ConsiderationsBuilding Envelope MeetingPre-Installation MeetingMock-ups/ Virtual Mock-upConstruction Concerns, QA/QC & Lessons Learned
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Go through the process to fully understand the complexities
Quality plan
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PRE-PLANNING & Design Considerations:Type of system being installedWhen is the system installed?What trade will be installing?What trade will be making final location / attachment?Adjustability of systemLocation of sheathing, insulation, and Air/Vapor
Barrier(AVB)?Type of AVB is to be installedContinuation of AVB system at wall and openingsFloor control or expansion joint locations
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Design Considerations:
Type of system
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Type of system installed?Dovetail type system set in the edge of slab
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Type of system installed?Hanging type system from the structural steel
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Type of system installed?Edge of Slab – Angle Direct
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Type of system installed?Edge of Slab – Knife Connections
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Type of system installed?Structural steel support – one way adjustment
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Type of system installed?Structural steel support – Welded only
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Type of system installed?Two way adjustment – Wrong Plane
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Type of system installed?Direct to CMU – No Adjustment / Potential Damage
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Type of system installed?No Adjustment - Shims
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Type of system installed?One Way Adjustment & Closed Head
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Type of system installed?One Way Adjustment & Closed Head
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Type of system installed?Double Angle
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Design Considerations:
When is the system installed and what trade is involved
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When is the system installed?
Timing of installation of components:During the concrete pourDuring the structural steel installationDuring the masonry installation
Weather (will affect the type of AVB system):Cold weatherWarm weather
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What trade is involved?
What trade installs the angle/system:Concrete ContractorSteel ContractorMason Contractor
Trade will be making final location / attachment:Steel ContractorMason ContractorSteel & Mason Contractor
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Design Considerations:
Adjustability of the system
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IS THE SYSTEM ADJUSTABLE?
System adjustability:Up / DownIn / Out
What systems do not allow for adjustment?
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Design Considerations:
Location of sheathing, insulation, and Air/Vapor Barrier(AVB)?
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LOCATION OF CONNECTIONS…
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LOCATION OF CONNECTIONS…
+ components are designed toaccommodate sheathing,
insulation and work space
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LOCATION OF SHEATHING…
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LOCATION OF SHEATHING…
+ Room to work- Must seal all steel
edges and bolts
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LOCATION OF SHEATHING…
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LOCATION OF SHEATHING…+ Room to work…if
components aredesigned toaccommodate
+ Do not need to sealextra components
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LOCATION OF SHEATHING…
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LOCATION OF SHEATHING…
+ Room to work- Must seal all steel
edges
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LOCATION OF SHEATHING…
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LOCATION OF SHEATHING…
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LOCATION OF SHEATHING…
+ Do not need to sealextra components
- No Room to work
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BEST LOCATION OF SHEATHING &
SHELF ANGLE DESIGN…
+ Room to work when componentsare designed to accommodate
+ Do not need to seal extracomponents
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Design Considerations:
Type of AVB to be installed…does it make sense?
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Membranes require bridging…it can
typically only span 1/8” to ¼” maximum…
Review with the manufacturer
installation instructions
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Product Shrinks with UV and Pulls
away at all of these connections
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Design Considerations:
Continuation of AVB system at wall and openings
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1 Piece or 2 Pieces?
(or More)
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Design Considerations:
Floor control or expansion joint location
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Are we installing on a CFMF and sheathing…does the CFMF go floor
to floor or fly by?
If floor to floor installation, we will need an expansion joint detail
at each floor level (typically on the bottom)
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Design Considerations:
Building Envelope Meeting
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The team must be open to
understanding the requirements, sometimes new,
for the exact product that is
being installed orbeing installed adjacent too…
No preconceived ideas
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Who is needed at a Building Envelope Meeting?
• ArchitectDesign
• General Contractor• General Contractor Quality
Contractor
• Concrete• CFMF / Sheathing (if used)• Masonry• Air Barrier• Exterior Skin Contractor (Metal Panel, EIFS, Etc.)• Curtainwall / Window• Roofing• Wood Blocking / General Trades
Trades
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Review the job specific details
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Design Considerations:
Pre-Installation Meeting
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The air barrier is one of the mostimportant items on any building –The installation and processmust reflect the importance
expectations
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ExpectationsSpecificationsDrawingsBuilding Envelope Meeting MinutesSubcontractor Scope of WorkSubmittalsTesting CriteriaMinimum time allotted 2-3 hours
Who/What is needed for a Pre-installation Meeting?
• Architect• Field observer
Design
• General Contractor• General Contractor Quality• Sub Contractor – FOREMAN A MUST• Manufacturer(s)
Contractor
• Owner• Testing Agency
Owner
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This is our chance to discuss the Quality
expectations by the team to the installers & office…
identifying lessons learned prior to the start of
installation will help assure a better overall product.
Quality Assurance
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Contractor’s Lessons learned
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ReviewScope
VerifyAir Barrier Materials
(even othertrades)
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Trade Sequencing
before?Air Barrier Installation
Trade Sequencing
after?
Discuss Sequencing and Potential Conflicts
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Review Compatibility
of all products
Discuss timing of material
installation
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Review Testing Requirements
Have Testing company
discuss their successes and
procedures
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A successful preinstallation meeting will produce:
Clear understanding of the Construction Documents and expectationsMock-Up description (Destructive) with building envelope tradesFirst Work in-place review guidelinesJob site review and verification (QC) procedures
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Design Considerations:
Mock-Ups
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PurposeSize/Configuration
SequenceConstructability
InspectionsVisual or
DestructiveProduce a
construction checklist
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Design Considerations:
Construction Concerns, QA/QC, and Lessons Learned
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Are we planning on using steel as part of
the air barrier system?
We need to discuss who will seal the steel at 8’-0”o.c. or similar
to create a continuous membrane.
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Reviewclearances
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Type of system installed?Construction tolerance - Alignment
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If we plan on installing
membrane on the underside,
Have a discussion on what will be
required, what materials are
best, and long term solutions.
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Its about Teamwork…
Stress open discussions
Don’t let this happen on your
project…
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Problems/ concerns might initially appear
very large in the beginning of the conversation…
At the end of the meeting, the concerns are
typically small and manageable
It’s all about perspective, openness to
conversation, and mutual problem
solving…
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How do we prevent risk
How do we get everyone on the
same page What is the next step
What is our best defense
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Corey S Zussman, AIA, NCARB, ALA, REWC, RWC, RRO, CDT, CQM,
LEED® AP BD+CDirector of Quality Assurance
Pepper Construction411 Lake Zurich Road
Barrington, Illinois [email protected]
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ThankYou!