**************************************************************************
Before any work under this section is begun, defects such as rough or
scaling concrete, low spots, high spots, and uneven surfaces shall have
been corrected, and damaged portions of concrete slabs shall have been
repaired. Floor shall be in a level plane with a maximum variation of 3 mm
1/8 inch every 3 m, 10 feet, except where indicated as sloped. Cracks and
irregularities shall be patched with a portland cement underlayment with a
liquid latex binder.
3.2
INSTALLATION OF CONDUCTIVE VINYL TILE
Conductive vinyl tile flooring shall be installed with conductive adhesive
in accordance with the approved manufacturer's installation instructions.
Tile lines and joints shall be kept square, symmetrical, tight, and even.
Tile at the perimeter of the area to be finished shall vary as necessary to
maintain full-size tiles in the field, but no perimeter tile shall be less
than one-half the field tile size, except where irregular shaped rooms make
it impossible. Tile shall be cut, fitted, and scribed to walls,
partitions, and projections after field flooring has been applied. A
grounding strap shall be installed.
3.3
INSTALLATION OF WALL BASE
3.3.1
Topset Cove Base
Topset cove base shall be installed in a manner recommended by the
manufacturer of the base.
3.3.2
Self-Coving
The conductive vinyl flooring shall be coved [100] [150] mm [4] [6] inch up
all walls, columns and pilasters. The coving shall be terminated at the
top against a cove cap. A cove stick shall be placed at the floor-wall
junction to support the coving at the bend. Metal corners, where
indicated, shall be installed at outside and inside corners.
3.4
CLEANING AND PROTECTING
The flooring shall be cleaned in accordance with the manufacturer's
recommendations. Flooring shall be protected by a covering of heavy-duty
building paper before foot traffic is permitted. Boardwalks shall be
placed over flooring in areas where subsequent building operations might
damage the floor. Tiles that become loose, broken, or curled prior to
acceptance, or tiles that do not conform to resistance requirements of UL
779 shall be removed and replaced.
3.5
TESTING
**************************************************************************
NOTE: For explosive and ammunition facilities,
delete this paragraph.
**************************************************************************
Between 4 and 30 days after flooring installation is completed, and prior
to its use, the flooring shall be tested in accordance with the test
methods and electrode construction of NFPA 99. The resistance average
shall be less than 1,000,000 ohms and more than 25,000 ohms. The
measurements shall be made between five or more points of contact on the
SECTION 09660
Page 7
Previous Page
