Tom Moore, PE Principal at Pinnacle Engineering, Inc SIPA ... · SIP BASICS: DETAILS ⚫ SIP screws...
Transcript of Tom Moore, PE Principal at Pinnacle Engineering, Inc SIPA ... · SIP BASICS: DETAILS ⚫ SIP screws...
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SIPs: An Engineer’s Perspective
Tom Moore, PE
Principal at Pinnacle Engineering, Inc
SIPA Board of Directors, Chair of Education Committee, on Technical Committee
Wood & SIP Committee of ASTM
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SIP BASICS: WHAT ARE SIPS?
• SIP = Structural Insulated Panel
• Composite structural panel
• Rigid foam core - EPS, XPS, or polyurethane
• Structural facings - usually 7/16” OSB
• Structural adhesive
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Rigid Foam Insulation
Structural Facings
Structural Adhesive
Optional Electrical Chase
WHAT ARE SIPS?
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Insulated metal wall panels
TYPES OF SIPS?
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Also available with cementitious skins – cement board, MgO board
Resistant to fire, mold, mildew
TYPES OF SIPS?
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SIP BASICS: DETAILS
Panel joints are designed to
reduce thermal bridging
where structurally possible
and sealed to reduce air
infiltration
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SIP BASICS: DETAILS
⚫ SIP screws go through the panels, into structure
⚫ Wood screw point for wood
⚫ Light drill point for metal/light gauge
⚫ Heavy drill point for steel/iron up to ¼”thick
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SIP BASICS: DETAILS
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SIP BASICS: DETAILS
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• A structural engineer with knowledge of SIP applications should be a part of the design process for any SIP structures
• Prevent the overdesign of the structural system, reduce costs, and meet code minimums
• Consult manufacturer code report and load charts for engineering information (www.sips.org)
ENGINEERING METHODS
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SIP ENGINEER vs. EOR
ENGINEERING METHODS
StructureMagazineFeb 2013
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ENGINEERING METHODS
• Sample manufacturer load chart from code report
• Loads are calculated per Chapter 16 of the IBC
• 2x4 studs @ 16”oc = 1600plf at 8’-0” tall
• 2x6 studs @ 16”oc = 2600plf up to 12’ tall
• 4.5” SIP = 3600plf at 8’-0” tall
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• Load charts vary by spline type and load type
• This is a block spline and surface spline chart
• Other spline types include I-joist, LVL, and 2x lumber
• 2x10 rafters @ 24”oc max span = 14’-8” for 35psf (#2SYP)
• 10.25” SIP max span for 35psf = 15’-0” (superimposed)
ENGINEERING METHODS
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ENGINEERING METHODS
Shear wall components
• OSB skins nailed to lumber at edges and splines at interior joints – similar to typical wood stud shear wall
• Standard SIP shear wall = 380plf
• Wood stud shear wall = 260plf
• 380plf with 4”oc edge nailing
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• Shear wall strap diagrams
• Hold down anchors at the ends of shear walls
• Shear plate anchor bolts must resist shear load
ENGINEERING METHODS
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ENGINEERING METHODS
• Shear wall values are available to cover all seismic design categories
• Diaphragm values for wind design for SIP roof panels should be available from the manufacturer
• Like all shear walls and diaphragms, chord forces are critical. Straps can help transfer these forces across joints in the edge lumber
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ENGINEERING METHODS
• Openings with heavy loads may require structural header
• Some openings possible with SIP acting as header; consult engineer or manufacturer
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• SIP Screws connect panels to each other and to supporting structure – resisting loads through tension and shear
ENGINEERING METHODS
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SIP STANDARDS
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SIP STANDARDS
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SIP STANDARDS
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SIP STANDARDS
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SHOP DRAWINGS
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SHOP DRAWINGS
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SHOP DRAWINGS
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SHOP DRAWINGS
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SHOP DRAWINGS
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SHOP DRAWINGS
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SHOP DRAWINGS
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Beyond combining SIPs with wood framing, other structural systems can be combined with SIPs to increase heights and spans in a building:
▪ Metal framing
▪ Structural steel
▪ Pre-engineered buildings
▪ Timber framing
▪ Glu-Lams
STRUCTURAL SIP HYBRIDS
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Hybrid systems: SIPs with metal framing
Buffalo University Day Care
Buffalo, New York
Kideney Architects
STRUCTURAL SIP HYBRIDS
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Hybrid systems: bar joists and structural steel with SIPs
STRUCTURAL SIP HYBRIDS
Silvis Middle School, East Moline, IL
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Hybrid systems: bar joists and structural steel with SIPs
STRUCTURAL SIP HYBRIDS
Silvis Middle School, East Moline, IL
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Pre-engineered building with SIPs
STRUCTURAL SIP HYBRIDS
SIPs manufacturing plant, Cottonwood, MN
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SIPs and timber framing
STRUCTURAL SIP HYBRIDS
Darien Nature Center, Darien, CT
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SIPs and timber framing
STRUCTURAL SIP HYBRIDS
Washington Fruit & Produce Corporate Office, Yakima, WA
10” SIPs roof panels covering 14,900 square feet of conditioned space, achieving R-values
that qualified for tax incentives as an Energy Qualified Cool Roof
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SIPs with Glu-Lams
STRUCTURAL SIP HYBRIDS
Silverwood Park Visitor Center, Minneapolis, MN
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Specification for SIPs available at www.sips.org
CONSTRUCTION METHODS AND
SPECIFICATIONS
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Specifications for SIPs (available at www.sips.org)
CONSTRUCTION METHODS AND
SPECIFICATIONS
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Coventry Senior Living, Mahtomedi, MN
COMMERCIAL APPLICATIONS
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Finn Hill Junior High School, Kirkland, WA
COMMERCIAL APPLICATIONS
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Finn Hill Junior High School, Kirkland, WA
COMMERCIAL APPLICATIONS
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COMMERCIAL APPLICATIONS
Aeon Alliance Expansion, Minneapolis, MN
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COMMERCIAL APPLICATIONS
Aeon Alliance Expansion, Minneapolis, MN
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COMMERCIAL APPLICATIONS
Bend Parks and Recreation, Bend, OR
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COMMERCIAL APPLICATIONS
Bend Parks and Recreation, Bend, OR