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SJS SYSTEM Guide Specification

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***SJS-SEISMIC JOINT SYSTEM by EMSEAL GUIDE SPECIFICATION***

Application: For Watertight, Sound Dampened, Traffic Bearing, Seismic and Large-Gap Parking Deck, Stadium, Sports Facility and Floor Expansion Joints

Basis of Design:                SJS - SEISMIC JOINT SYSTEM by EMSEAL

USA & INTERNATIONAL:  EMSEAL JOINT SYSTEMS, LTD, 23 Bridle Lane, Suite 3, Westborough, MA 01581-2603, Toll Free: 800-526-8365 or PH: 508-836-0280, FX: 508-836-0281, www.emseal.com.

CANADA:  EMSEAL CORPORATION, 120 Carrier Drive, Toronto, Ontario, Canada, M9W 5R1 Toll Free: 800-526-8365 or PH: 416-740-2090, FX: 416-740-0233, www.emseal.com.

Basis of Design: SJS - SEISMIC JOINT SYSTEM by EMSEAL for watertight, sound dampened, seismic and large-gap parking deck, stadium, and floor expansion joints.  Typical locations include, but are not limited to the following: applications for high-movement and seismic structural joints from 4 to 18 inches (150-450 mm).

Expansion joint system shall be comprised of the following components: silicone-and-impregnated-foam hybrid, heavy-duty extruded aluminum center spline, interlocking spline connectors and heavy duty cover plates. Hybrid seal shall be silicone pre-coated, preformed, precompressed, self-expanding, sealant system. Expanding foam shall be made of cellular foam infused with a hydrophobic, modified-acrylic dispersion. Wax or wax compounds not permitted. 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.  All terminations at ends of joints as well as all changes in plane and direction to be executed using fabricated assemblies that preserve continuity of seal.  Transitions between SJS and any other of Manufacturer’s joint systems in the vertical plane to be executed according to Manufacturer’s details and to be warranted as watertight.

Attachment to the substrates to be achieved without the use of any metal or mechanical anchors, fasteners, or embeds.  Hybrid seals to be installed into manufacturer's standard field-applied, 100% solids, aggregate-free, epoxy adhesive.  The system is to be installed slightly recessed from the surface such that when the field-injected silicone sealant bands are executed the system will be essentially flush with the substrate surface. Watertightness to be achieved without the use of gutters, vapor barriers, bladders, or other devices suspended beneath or within the system or structure in any way. 

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 centering.  SJS SYSTEM 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.  System to have been tested, with reports available on request, according to Finite Element Analysis (FEA) conducted by an independent third party laboratory.  FEA to include simulation of 4000lb vehicle skidding across the joint system to a stop with resulting safety factor calculations of key components no less than: coverplate-5, coverplate screws-11, spline pins-10, spline-7.

Cover plates to be of metal as designated by the designer for each location.  Plates to have coarse, shot-blasted finish resulting in wet and dry static coefficient of friction not less than 0.9 when tested according to ASTM C 1028 and with independent laboratory test report for supporting documentation.

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 installation.   Bids must include for presence of paid-for manufacturer’s field technician to be present during initial preparation inspection and material installation. 

Material shall be capable of movements not less than +50%, -50% (100% total) of nominal material size.

All substitute candidates’ impregnated foam components to be certified in writing to be free in composition of any waxes or asphalts, wax compounds or asphalt compounds.  All substitute candidates 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 will 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).

***END OF GUIDE SPECIFICATION***

SJS SYSTEM GuideSpec (.doc)

Member:

Sealant Waterproofing and Restoration Institute

Construction Specifications Canada

Expansion joints and precompressed joint sealants by EMSEAL

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