Skywalks at Hilton Hotel, Logan International Airport
sealed with SEISMIC
COLORSEAL by EMSEAL.
A pedestrian sky-bridge
connects central parking with the Logan Hilton hotel. At each end
of the skybridge are structural expansion joints to absorb the expansion
and contraction of the sky-bridge as well as any possible sesismic
between the curtain-wall mullions of the sky-bridge and the precast
concrete panels of both the garage and the hotel facade required a joint
system that promised
continuity of seal through all the direction changes and featured
the practical ability to be installed where there is obstructed access
at inside corners.
In addition, the material must
be watertight, look good, thermally insulate, block sound, resist
air-pressure differentials, and must do all of this
while moving through extreme seasonal temperature cycles.
Specified for this project was a non-watertight "strip seal".
Invasive anchors would not only violate the mullion integrity, but made
it impossible to install this type of system into the inside-corners.
In addition it would have been impossible to make the rubber seals
continuous in all the direction changes. Finally, strip seals
R-value at joints as the aluminum rails and screws are a thermal
rubber has little insulation value.
Aesthetics: The appearance of the seal
making the intersection between the curtainwall and the masonry is critical to the
architect and owner.
Selection of Gray from the standard
26-COLORS makes the seal
appear an integral part of the skywalk curtainwall system
COLORSEAL by EMSEAL uniquely handles all of the challenges posed by this application.
High wind resistance--Curtainwall systems are required to be tested
to meet the ASTM performance tests E-293, E-331, and E-330.
Sealants generally are not. To us it makes sense that the
expansion joint sealant that will connect the curtainwall to the
building should be independently certified to meet the same criteria.
Consequently, we have tested SEISMIC COLORSEAL to meet or substantially
exceed these same standards.
Multiple changes in plane and direction are readily handled
through field mitering and splicing. Using joining silicone supplied from the same batch
used to manufacture the coating ensures
seal throughout the expansion joint run.
Thermal Insulation: Because skywalks
are suspended, expansion joints are particularly susceptible to allowing thermal loss.
SEISMIC COLORSEAL has an R-value of 2.15 per inch of depth giving this application
an R-rating of more than 8.5 at the joints.
COLORSEAL is one of the hugely versatile
family of cutting edge composite sealing technologies available from EMSEAL
EMSEAL JOINT SYSTEMS LTD. 25 Bridle Lane, Westborough, MA 01581 EMSEAL LLC. 120 Carrier Drive, Toronto, ON M9W 5R1