SCHÖCK – ISOKORB®
MASTER SPECIFICATION
30 November 2012
Section 05 12 19
STRUCTURAL STEEL INSULATED CONNECTIONS
SECTION 05 12 19 – STRUCTURAL STEEL INSULATED CONNECTIONS
PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
SUMMARY
A.
Section Includes:
1.
B.
a.
Exterior structural steel framing to interior structural steel framing.
b.
Exterior structural steel framing to interior cast-in-place concrete floors.
Related Sections:
1.
2.
1.3
Engineered factory fabricated thermally-broken structural assemblies for connecting:
Division 03 Section Cast-in-Place Concrete for placing connection anchors in concrete,
formwork preparation, adjacent reinforcing, and placing concrete.
Division 05 Section Structural Steel Framing for placing connection anchors, and welding
and erection of adjacent steel framing.
ACTION SUBMITTALS
A.
Product Data: For each type of product indicated. Indicate foam insulation is free of HCFCs,
CFCs, HFCs and halogenated cell gases.
B.
LEED Submittals: Product Data for Credit MR 4: For products having recycled content,
documentation indicating percentages by weight of postconsumer and preconsumer recycled
content. Include statement indicating cost for each product having recycled content as follows:
1.
C.
Complete “Section 018113.44.MR4 – LEED Product Information Form Materials and
Resources Credit 4.1 + 4.2 Recycled Content Products”.
Shop Drawings: Submit Shop Drawings simultaneously with those specified in Division 1.
Include assembly locations, plans, elevations, dimensions, shapes and sections, support
conditions, and types of reinforcement, including special reinforcement. Detail fabrication and
installation of structural thermal break assemblies.
1.
2.
3.
Reinforcing Steel: Comply with ACI 315 - Details and Detailing of Concrete
Reinforcement.
Indicate welded connections by AWS standard symbols. Show size, length, and type of
each weld.
Detail connections.
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SCHÖCK – ISOKORB®
MASTER SPECIFICATION
30 November 2012
4.
5.
6.
7.
Section 05 12 19
STRUCTURAL STEEL INSULATED CONNECTIONS
Indicate locations, tolerances, and details of anchorage devices to be embedded in or
attached to structure or other construction.
Indicate location of each thermal break assembly unit by same identification mark placed
on assembly unit.
Indicate relationship of assemblies to adjacent materials.
Indicate locations and details of special supports or cambering.
D.
Sample Assemblies: For each structural steel thermal break assembly. Illustrate materials,
workmanship and method of joining subsequently placed materials.
E.
Delegated-Design Submittal: For structural thermal break assemblies indicated to comply with
performance requirements and design criteria, including analysis data signed and sealed by the
qualified professional engineer responsible for their preparation.
1.4
INFORMATIONAL SUBMITTALS
A.
Qualification Data: For manufacturer, installer, inspection agency and professional engineer.
B.
Material Certificates: For the following, from manufacturer:
1.
2.
3.
4.
5.
6.
Reinforcing materials.
Structural-steel components.
Bearing pads.
Thermal barrier materials.
Insulation.
Anchors.
C.
Material Test Reports: For reinforcing steel and structural steel, certified copies of mill test
report of materials analysis.
D.
Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified
testing agency, for the following, indicating compliance with performance requirements.
1.
2.
3.
E.
1.5
Each type of structural thermal break assembly.
Studs, nuts, and washers including mechanical properties and chemical analysis.
Tension performance of reinforcing bars and associated welds.
Field quality-control [and special inspection] reports.
QUALITY ASSURANCE
A.
Manufacturer Qualifications: A firm that assumes responsibility for engineering structural
thermal break assemblies to comply with the performance requirements. Responsibility
includes preparation of Shop Drawings and comprehensive engineering analysis by a qualified
professional engineer.
1.
B.
Products of This Section: Manufactured to ISO 9001 certification requirements.
Installer Qualifications: A qualified installer trained by manufacturer to install structural thermal
break assemblies of the types indicated, and with minimum five years documented experience
in steel erecting/concrete reinforcing installing similar to the Work indicated.
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SCHÖCK – ISOKORB®
MASTER SPECIFICATION
30 November 2012
Section 05 12 19
STRUCTURAL STEEL INSULATED CONNECTIONS
C.
Inspection Agency Qualifications: An independent agency, acceptable to authorities having
jurisdiction, qualified according to ASTM C 1077 and ASTM E 329 for testing indicated.
D.
Design Standards: Comply with the following specifications and documents, as applicable to
types of structural thermal break assemblies indicated, unless modified by requirements in the
Contract Documents.
1.
Concrete Construction:
a.
b.
c.
d.
2.
ACI 301 - Specifications for Structural Concrete.
ACI 117 - Specifications for Tolerances for Concrete Construction and Materials.
ACI 318 - Building Code Requirements for Structural Concrete.
CRSI - Manual of Standard Practice.
Steel Construction:
a.
b.
c.
d.
AISC 303 - Code of Standard Practice for Steel Buildings and Bridges.
AISC 341 and AISC 341s1 - Seismic Provisions for Structural Steel Buildings
Including Supplement No. 1.
AISC 360 - Specifications for Structural Steel Buildings.
Specification for Structural Joints Using ASTM A 325 or A 490 Bolts by Research
Council on Structural Connections (RCSC).
E.
Mockups: Fabricate full-sized mockups of structural concrete/steel thermal break assemblies
before production, to [verify selections made under sample submittals and to demonstrate
aesthetic effects and to set quality standards for materials and execution.
F.
Preinstallation Conference: Conduct conference at Project site.
1.
Before fabricating assemblies, review special inspection and inspecting agency
procedures for quality control, anchorage device installation tolerances, steel
reinforcement installation, structural steel framing installation, minimum requirements for
concrete mixes and compressive strengths and examine procedures for ensuring quality
of materials. Require representatives of each entity directly concerned with the work to
attend, including the following:
a.
b.
c.
d.
1.6
Contractor's superintendent.
Independent testing agency responsible for quality control.
Structural thermal break assembly manufacturer.
Structural-steel framing and concrete subcontractor.
DELIVERY, STORAGE, AND HANDLING
A.
Store assemblies with adequate support and protect units to prevent contact with soil, to
prevent staining, and to prevent displacement or physical damage.
1.
B.
Place stored units so identification marks are clearly visible, and units can be inspected.
Handle and transport units in a position consistent with their shape and design in order to avoid
excessive stresses that would cause displacement or physical damage. Protect exposed ends
of reinforcement to prevent injury; provide continuous wood bar across ends, or suitably sized
plastic caps.
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SCHÖCK – ISOKORB®
MASTER SPECIFICATION
30 November 2012
1.7
Section 05 12 19
STRUCTURAL STEEL INSULATED CONNECTIONS
COORDINATION
A.
Coordinate work with installation of connections to supporting structural components.
B.
Furnish anchorage items to be embedded in, or attached to, other construction before starting
that Work. Provide locations, setting diagrams, templates, instructions, and directions, as
required, for installation.
C.
Coordinate selection of shop primers to structural steel assemblies with selection of topcoats or
fire protective coatings to be applied over them. Comply with paint and coating manufacturers'
recommendations to ensure that shop primers and topcoats are compatible with one another.
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
Manufacturer: Subject to compliance with requirements, provide Isokorb products by:
1.
Schöck Bauteile GmbH, Vimbucher Str. 2, 76534 Baden-Baden (Germany); tel. 001 49
7223 967 0; www.schoeck.com; export@schoeck.com.
Distributor: Schöck USA Inc. 500 Fifth Avenue, #4810, New York, NY 10110
Tel.: 855 572 4625
Email: info@schock-us.com
www.schock-us.com
B.
2.2
Substitutions: Not permitted.
MATERIALS, GENERAL
A.
LEED Requirements:
1.
2.3
Recycled Content of Steel Products: Postconsumer recycled content plus one-half of
pre-consumer recycled content not less than 25.
STRUCTURAL THERMAL BREAK ASSEMBLIES
A.
General: Provide steel-to-steel or steel-to-concrete thermal break assemblies, engineered,
tested and sized to suit structure as indicated.
B.
Reinforcing Bars:
1.
2.
C.
Plain Billet Steel Bars: ASTM A 615/A 615M, 60 ksi yield strength, deformed, weldable.
Stainless-Steel Bars: ASTM A 955/A 955M, 60 ksi yield strength, Type 316Ti, deformed,
weldable.
Pressure Bearing Pads: High-strength micro-steel fibre-reinforced concrete with Kronolith
insulating aggregate, designed to restrain reinforcement ends within thermal break assembly,
and within formed high-density polyethylene outer covering.
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SCHÖCK – ISOKORB®
MASTER SPECIFICATION
30 November 2012
Section 05 12 19
STRUCTURAL STEEL INSULATED CONNECTIONS
D.
Expanded-Polystyrene Foam Insulation: Manufacturer’s standard high density foam with
graphite; Neopor by BASF; minimum thermal conductivity of 0.018 Btu/ft. x h x deg F (0.031
W/m x K); with maximum flame-spread and smoke-developed indexes of 25 and 450,
respectively, per ASTM E 84; and free of HCFCs, CFCs, HFCs and halogenated cell gases
during manufacturing and when installed.
E.
Thermal Barrier Materials: Cementitious board, gypsum board, and mineral wool safing
insulation complying with requirements of applicable code for protective cover to foam insulation
within assembly per ASTM E84, and, for field installation at top and bottom of assembly.
F.
Insulated Assembly Top and Bottom Caps: Manufacturer’s standard high density extruded
polyethylene designed to suit assembly profile and house manufacturer’s thermal barrier board,
and with intumescent strips applied each side of top cap. Cap assembly to comply with
requirements of applicable code for protective cover to foam insulation within assembly.
G.
Steel to Steel Connection:
1.
2.
Stainless-Steel Plate: ASTM A 666, Type 316Ti, of grade suitable for application as, high
strength, pressure and shear bearing devices.
Stainless-Steel Rods and Nuts:
a.
3.
Studs: ASTM F 593, Alloy 316Ti, high strength, rods, threaded, pressure and
shear bearing devices.
b.
Lubricate threaded parts of with an anti-seize thread lubricant during assembly.
c.
Nuts and Washers: Hex nuts, ASTM F 594 (ASTM F 836M); and flat washers;
Alloy [Group 1 (A1)] [Group 2 (A4)].
Dimensions:
a.
b.
c.
H.
Product: Schöck Isokorb® S-line:
1.
2.4
Length: 7 inches (180 mm).
Width: 3-1¼ inches (80 mm).
Height: 2-1¼ inches (60 mm).
ISOKORB type S22, modular assembly for cantilever steel beams resisting normal force
and shear force. Moments to be transmitted by combining several modules
WELDING ELECTODES
A.
2.5
Comply with AWS standards.
PERFORMANCE REQUIREMENTS
A.
Delegated Design: Design structural thermal break assemblies, including comprehensive
engineering analysis by a qualified professional engineer, using performance requirements and
design criteria indicated.
B.
Structural Performance - Exterior steel to interior steel framing or exterior steel to interior castin-place concrete floor assembly: Provide structural thermal break assemblies and connections
capable of withstanding the following design loads :
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SCHÖCK – ISOKORB®
MASTER SPECIFICATION
30 November 2012
1.
Provide assembly connections capable of withstanding the design loads indicated: and
and the following:
a.
b.
c.
2.
2.6
Design Moment: [____] lbf-ft.
Shear Force: [____] lbf.
Axial Load: [____] lbf.
Design assemblies and connections to maintain clearances at openings, to allow for
fabrication and construction tolerances, accommodate live-load deflection, shrinkage and
creep of primary building structure and other building movements. Maintain structural
concrete deflections within limits of ACI 318 (ACI 318M) and AISC 360.
a.
3.
Section 05 12 19
STRUCTURAL STEEL INSULATED CONNECTIONS
Thermal Movements: Allow for in-plane thermal movements resulting from annual
ambient temperature changes of minus [30] to plus [120] deg F.
Durability: Design structural thermal break assemblies to achieve exposure classes and
minimum concrete compressive strengths as specified in Division 03 Section Cast-inPlace Concrete.
FABRICATION
A.
General: Comply with Manual of Standard Practice by CRSI.
B.
Welding: Comply with applicable AWS D1.1/D1.1M and AWS D1.4 for welding, welding
electrodes, appearance, quality of welds, and methods used in correcting welding work.
1.
2.
C.
Weld studs according to AWS D1.1/D1.1M and AWS C5.4, "Recommended Practices for
Stud Welding."
Remove, re-weld, or repair incomplete and defective welds.
Reinforcement: Comply with recommendations in referenced design standards for fabricating,
placing, and supporting reinforcement, and Manual of Standard Practice by CRSI.
1.
2.
3.
Reinforcing Type: Tension and Shear reinforcing bars each comprising stainless steel
reinforcing bars within insulated part of assembly end-welded to plain steel bars.
Accurately position, support, and secure reinforcement against displacement during
concrete-placement and consolidation operations. Completely conceal support devices
to prevent exposure on finished surfaces.
Place reinforcement to maintain at least 3/4-inch (19 mm) minimum coverage. Increase
cover requirements according to referenced design standards when units are exposed to
corrosive environment or severe exposure conditions, but not less than 1-1/2 inches (38
mm). Arrange, space, and securely tie bars and bar supports to hold reinforcement in
position while placing concrete. Direct wire tie ends away from finished, exposed
concrete surfaces.
D.
Reinforce structural thermal break assemblies to resist handling, transportation, and erection
stresses.
E.
Protect strand ends and anchorages with manufacturer recommended removable protective
coatings or coverings to avoid corrosion.
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SCHÖCK – ISOKORB®
MASTER SPECIFICATION
30 November 2012
Section 05 12 19
STRUCTURAL STEEL INSULATED CONNECTIONS
F.
Discard and replace structural thermal break assembly units that do not comply with
requirements, including structural, manufacturing tolerance, and appearance, unless repairs
meet Architect's approval.
G.
Size assemblies to accommodate required thicknesses of integrated thermal barrier materials.
2.7
FABRICATION TOLERANCES
A.
Fabricate structural break assemblies straight and true to size and shape and to applicable
requirements of ACI 117.
PART 3 - EXECUTION
3.1
EXAMINATION
A.
Examine supporting structural frame or foundation and conditions for compliance with
requirements for installation tolerances, true and level bearing surfaces, and other conditions
affecting performance of the Work.
B.
Proceed with installation only after unsatisfactory conditions have been corrected.
C.
Do not install precast concrete units until supporting, cast-in-place, building structural framing
has attained minimum allowable design compressive strength or until supporting steel or other
structure is complete.
3.2
PREPARATION
A.
3.3
Clean reinforcement of loose rust and mill scale, earth, ice, and other foreign materials that
would reduce bond to concrete, immediately prior to placing of concrete.
INSTALLATION
A.
Install structural thermal break assemblies level, plumb, and square within specified allowable
tolerances. Provide temporary structural supports, and bracing as required to maintain position,
stability, and alignment of units until permanent connection or support.
B.
Accurately position, support, and secure reinforcement against displacement, and in
accordance with Manual of Standard Practice by CRSI. Locate and support reinforcement with
bar supports to maintain minimum concrete cover,
C.
Field cutting of components is not permitted without approval of the Architect.
D.
Field welding of components is not permitted.
E.
At bolted connections, use lock washers, or other approved means to prevent loosening of nuts
after final adjustment.
1.
Where slotted connections are used, verify bolt position and tightness. For sliding
connections, properly secure bolt but allow bolt to move within connection slot. For
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SCHÖCK – ISOKORB®
MASTER SPECIFICATION
30 November 2012
Section 05 12 19
STRUCTURAL STEEL INSULATED CONNECTIONS
friction connections, apply specified bolt torque and check 25 percent of bolts at random
by calibrated torque wrench.
F.
3.4
Install thermal barrier materials according to manufacturer's written instructions and to comply
with requirements for layer thicknesses, jointing methods and anchorage methods applicable to
requirements of applicable code.
INSTALLATION TOLERANCES
A.
3.5
Maximum Variation from Plumb and Level of Structural Thermal Break Assemblies: 1/8 inch (3
mm).
FIELD QUALITY CONTROL
A.
Inspections: Owner will engage a qualified testing and inspecting agency to perform field
inspections and prepare reports.
B.
Provide inspector and Architect access to installed assemblies to facilitate inspection of
reinforcement. Provide notification of commencement and duration of shop fabrication in
sufficient time to allow inspection.
C.
Inspections:
1.
2.
Steel reinforcement placement.
Studs.
D.
Inspector will report findings promptly and in writing to Contractor and Architect.
E.
Repair or remove and replace work where tests and inspections indicate that it does not comply
with specified requirements.
F.
Prepare inspection reports.
G.
Manufacturer's Field Service:
1.
2.
3.
4.
3.6
Engage a factory-authorized representative to inspect structural thermal break
assemblies at commencement, during and at completion of installation.
Remove and replace assemblies where inspections indicate that they do not comply with
specified requirements.
Additional inspections, at Contractor's expense, are performed to determine compliance
of replaced or additional work with specified requirements.
Prepare inspection reports.
CLEANING
A.
Clean reinforcement of loose rust and mill scale, earth, ice, and other foreign materials that
would reduce bond to concrete.
END OF SECTION 05 12 19
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