Expansion Joints and Pre-Compressed Sealants
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Sections 07 90 00 / 07 95 00
SJS--SEISMIC JOINT SYSTEM by EMSEAL
Preformed, Pre-Compressed, Self-Expanding, Seismic Joint
Watertight, Traffic Durable, Primary Seal for Seismic and
Large-Gap Horizontal Joints
PART 1 – GENERAL
1.01 Work Included
The work shall consist of furnishing and installing
waterproof expansion joints in accordance with the details
shown on the plans and the requirements of the
specifications. Expansion joint shall be comprised of a
sealing assembly made up of two horizontal joints made of
silicone-coated, precompressed foam pre-assembled in
parallel adjacent to a heavy-duty extruded aluminum spline.
The spline shall act as a receptor for attaching a
surface-mounted traffic plate.
Division 3 - Cast-in-Place Concrete
Division 7 - Thermal & Moisture Protection
Division 7 - Sealants, Caulking and Waterproofing
General – Submit the following according
to Division 1 Specification Section.
Standard Submittal Package – Submit
typical expansion joint drawing(s) indicating pertinent
dimensions, general construction, expansion joint opening
dimensions and product information.
Alloys where used:
Plates: Aluminum 6061-T6 alloy
meeting ASTM B221-95a
Plates: Stainless Steel Grade 304
meeting ASTM A240 and A666
Sample of material is required at time of
All products must be certified by independent laboratory
test report to be free in composition of any waxes or wax
compounds using FTIR and DSC testing.
All products shall be certified in writing to be: a)
capable of withstanding 150°F (65°C) for 3 hours while
compressed down to the minimum of movement capability
dimension of the basis of design product (-50% of nominal
material size) without evidence of any bleeding of
impregnation medium from the material; and b) that the same
material after the heat stability test and after first being
cooled to room temperature will subsequently self-expand to
the maximum of movement capability dimension of the
basis-of-design product (+50% of nominal material size)
within 24 hours at room temperature 68°F (20°C).
An FEA Report by a certified engineer must be submitted
providing engineering information stating lateral and
non-linear displacement and safety factors on key system
components under conditions simulating a 4000 lb vehicle
skidding across the joint system inducing an 800 lb
tangential load. Product must demonstrate FEA Safety
Factors: Traffic Plate – 5; Screws – 11; Spline Pins - 10;
Center Spline – 7.
All products must be certified by independent laboratory
test report to be tested to meet or exceed ASTM C1028 the
standard method for determining Static Coefficient of
All foam/spline/hangar-bar components shall be
pre-assembled at the factory. No field assembly of component
foam-to centering spline shall be allowed. No field assembly
of metal-to-metal or plastic or rubber spline components
shall be permitted.
Finished systems shall have factory pre-cured, elastomeric
silicone bellows disposed on the upward facing surface of
the flanking foam as the primary source of water proofing.
Sealers, sealants, or saturants infused into the upper areas
of the foam matrixes for the intented purpose of performing
or contributing to performance as a an elastomeric
waterproofing layer in lieu of a silicone bellows layer
shall NOT be permitted.
A silicone sealant band must be installed between the
substrates and outer pre-cured silicone bellows throughout
the length of the assembly as well as at the interface of
factory preassembled units.
1.03 Product Delivery, Storage and Handling
Deliver products to site in Manufacturer’s original,
intact, labeled containers. Handle and protect as necessary
to prevent damage or deterioration during shipment, handling
and storage. Store in accordance with manufacturer’s
All joints shall be designed to meet the
specified performance criteria of the project as
manufactured by: (USA & International) EMSEAL JOINT SYSTEMS,
LTD 25 Bridle Lane, Westborough, MA 01581-2603, Toll Free:
800-526-8365. (Canada) EMSEAL, LLC 120 Carrier Drive,
Toronto, Ontario, Canada M9W 5R1 Toll Free: 800-526-8365.
Alternate manufacturers must demonstrate
that their products meet or exceed the design criteria and
must submit certified performance test reports performed by
nationally recognized independent laboratories as called for
in section 1.02 Submittals. Submittal of alternates must be
made three weeks prior to bid opening to allow proper
1.05 Quality Assurance
The General Contractor will conduct a
pre-construction meeting with all parties and trades
involved in the treatment of work at and around expansion
joints including, but not limited to, concrete, mechanical,
electrical, HVAC, landscaping, masonry, curtain wall,
waterproofing, fire-stopping, caulking, flooring and other
finish trade subcontractors. All superintendents and foremen
with responsibility for oversight and setting of the joint
gap must attend this meeting. The General Contractor is
responsible to coordinate and schedule all trades and ensure
that all subcontractors understand their responsibilities in
relation to expansion joints and that their work cannot
impede anticipated structural movement at the expansion
joints, or compromise the achievement of watertighness or
life safety at expansion joints in any way.
Warranty – Manufacturer’s standard
warranty shall apply.
LEED Building Performance Requirements:
The VOC of the silicone must not exceed 50 grams/liter.
PART 2 – PRODUCT
Provide traffic durable, watertight,
sound dampened, seismic, large-gap, and high-movement
expansion joint by EMSEAL JOINT SYSTEMS. Typical locations
include, but are not limited to the following: applications
over occupied space, stadiums, floors, and parking decks.
System shall perform waterproofing, traffic bearing and
movement-accommodation functions as the result of a single
installation and without the addition of gutters, vapor
barriers, bladders, or other devices suspended beneath or
within the system in any way.
Provide SJS as manufactured by EMSEAL
JOINT SYSTEMS LTD and as indicated on drawings for
horizontal expansion joint locations.
Sealant system shall be comprised of the following
components: 1.) cellular foam infused with a hydrophobic,
modified-acrylic dispersion, 2.) pre-coated with a
watertight silicone outer coating, 3.) heavy-duty extruded
aluminum center spline, 4.) interlocking spline connectors
and heavy duty cover plates, 5.) field-applied epoxy
adhesive primer, 6.) field-injected silicone sealant bands.
Material shall be capable of movements of +50%, -50%
(100% total) of nominal material size. Standard sizes from
4" (100 mm) and greater. Depth of seal as recommended by
Silicone coating to be highway-grade, low-modulus,
jet-fuel resistant silicone applied to the impregnated foam
sealant at a width greater than maximum allowable joint
extension and which when cured and compressed will form a
SJS to be installed directly over a
leveling-bed of elastomeric nosing material to be supplied
by manufacturer. Elastomeric nosing material to have an
aggregate of fine, washed sand not to exceed 30 mesh and
chopped strand fiberglass AND aggregate to resin ratio not
to exceed 2:1 by weight.
SJS to be installed into manufacturer’s
standard field-applied epoxy adhesive.
The foam seal is to be installed slightly
recessed from the surface such that when the field-applied
injection band of silicone is installed between the
substrates and the foam-and-silicone-bellows, the system
will be essentially flush with the substrate surface.
Tool-steel, connector pins shall be
located in center spline for end to end connections. Heavy
duty cover plate to be held in place by stainless-steel,
self-tapping screws installed into the continuous anchor
channel of the heavy-duty extruded spline. No mechanical
self-centering bars, springs, or sliding ball components
shall be employed in maintaining coverplate attachment and
Select the sealant system model
appropriate to the movement and design requirements at each
joint location that meet the project specification or as
defined by the structural engineer of record.
Manufacturer’s Checklist must be
completed by expansion joint subcontractor and returned to
manufacturer at time of ordering material.
SJS by EMSEAL must be supplied
pre-assembled and precompressed to less than the joint size,
packaged in shrink-wrapped lengths (sticks).
Directional changes and terminations into
vertical plane surfaces (walls, parapets, ends of decks,
etc) as well as to transition the material through curbs,
treads and risers or other in-slab plane changes to be
provided by factory-manufactured single units or through
field fabrication in strict accordance with published
PART 3 – EXECUTION
Preparation of the Work Area
The contractor shall provide properly
formed and prepared expansion joint openings constructed
to the exact dimensions and elevations shown on
manufacturer’s standard system drawings or as shown on
the contract drawings. Deviations from these dimensions
will not be allowed without the written consent of the
engineer of record.
The contractor shall clean the joint
opening of all contaminants immediately prior to
installation of expansion joint system. Repair spalled,
irregular or unsound joint surfaces using accepted
industry practices for repair of the substrates in
question. Remove protruding roughness to ensure joint
sides are smooth. Ensure that there is sufficient depth
to receive the full depth of the size of the SJS being
installed. Refer to Manufacturers Installation Guide for
detailed step-by-step instructions.
No drilling, or screwing, or
fasteners of any type are permitted to anchor the system
into the substrate.
System to be installed by qualified
sub-contractors only according to detailed published
installation procedures and/or in accordance with
job-specific installation instructions of manufacturer’s
field technician. Bids must include for presence of
paid-for manufacturer’s field technician to be present
during initial preparation, inspection, and material
3.02 Clean and Protect
Protect the system and its components
during construction. Subsequent damage to the expansion
joint system will be repaired at the general contractor’s
expense. After work is complete, clean exposed surfaces with
a suitable cleaner that will not harm or attack the finish.
END OF SECTION