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The following guide specification is
presented in an easy-to-copy-and-paste format. In addition, if you prefer, you may download this guide specification in .doc or .pdf formats: DSM 3-Part Spec (.doc) DSM 3-Part Spec (.pdf) |
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SPECIFICATION Sections 07 90 00 / 07 95 00 DSM by EMSEAL Preformed, Pre-Compressed, Self-Expanding, Sealant System with Silicone Pre-Coated Surface Watertight, Traffic Durable, Primary Seal for Horizontal Joints ***Note to Specifier: With its introduction in 2006 the DSM SYSTEM supersedes its predecessors, 20H SYSTEM and DSH SYSTEM, in most applications. The DSM SYSTEM builds on a track record of over 30 years of sealing horizontal plane joints with impregnated foam sealants and is an evolution of EMSEAL’s earlier technologies. The DSM SYSTEM features greater movement capability, dual sealing, a fuel resistant silicone bellows coating, greater movement capability, better low temperature flexibility, and improved high temperature stability. It achieves these improvements through EMSEAL’s new cellular-acrylic impregnation technology and is free of any asphalt compounds. Additionally, the DSM SYSTEM is totally free of wax or wax compounds. Consequently the suitability of the DSM SYSTEM is extended geographically as well as to applications such as in metal-angles, and top-decks previously not recommended for joint-face-adhered systems. ***PART 1 – GENERAL
Standard Submittal Package – Submit
typical expansion joint drawing(s) indicating pertinent
dimensions, general construction, expansion joint
opening dimensions and product information.
Sample of material is required at
time of submittal.
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 (-25% 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 (+30% of nominal material size) within 24 hours
at room temperature 68°F (20°C). 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 installation
instructions. Basis of Design 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. www.emseal.com
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 evaluation
time. 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 General Provide traffic durable, watertight,
expansion joint by EMSEAL Joint Systems for expansion
joints and isolation joints in decks. Typical
locations include, but are not limited to the following:
applications for joints over occupied space,
below-grade, stair tower perimeters, elevator
perimeters, stadium tread and risers, parking deck
joints, treatment plant perimeters and covers, ice-floor
perimeter joints, and structural expansion joints.
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 DSM as manufactured by EMSEAL
JOINT SYSTEMS LTD and as indicated on drawings for
horizontal-plane expansion joint locations.
Sealant system shall be comprised of
three components: 1) cellular polyurethane foam
impregnated with hydrophobic 100% acrylic, water-based
emulsion, factory coated with highway-grade, fuel
resistant silicone; 2) field-applied epoxy adhesive
primer, 3) field-injected silicone sealant bands.
Material shall be capable as of
movements of +30%, -25% (55% total) of nominal material
size. Standard sizes from 1/2" (12mm) to 4" (150mm).
Depth of seal as recommended by manufacturer.
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 bellows.
DSM to be installed into
manufacturer’s standard field-applied epoxy adhesive.
DSM 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.
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. Fabrication DSM by EMSEAL must be supplied
precompressed to less than the joint size, packaged in
shrink-wrapped lengths (sticks).
Directional changes and terminations
into horizontal plane surfaces to be provided by
factory-manufactured universal-90-degree single units
containing minimum 12-inch long leg and 6-inch long leg
or custom leg on each side of the direction change or
through field fabrication in strict accordance with
installation instructions. PART 3 – EXECUTION Installation 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 DSM 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
sealant 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.
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 |
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Meet online now:
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Expansion joints and precompressed joint sealants by EMSEAL
1-800-526-8365 -- 508-836-0280 --
techinfo@emseal.com
-- Fax: 508-836-0281 Last Modified: February 09, 2012
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