of less than 25 when tested according to ASTM E 84.]
2.2.1
Flat Steel Sheet
ASTM A 653/A 653M with Z180 G-60 coating, minimum 24 gage, phosphatized.
2.2.2
Plywood
PS-51 for exterior, sound grade hardwood, Type I.
2.2.3
Hardboard
PS-58 for standard type hardboard.
2.2.4
Adhesive for Laminating Steel Sheets to Structural Core
Waterproof type which maintains a permanent bond for the lifetime of the
enclosure.
2.2.5
Floor Finish
**************************************************************************
NOTE: Indicate or specify whether other flooring is
to be provided or higher floor loads are required.
This is most critical when raised floors are
required. Allowances must be made for elevated door
thresholds. Vinyl composition 1 is asbestos-free
and should be specified for all projects.
**************************************************************************
Vinyl-composition tile, ASTM F 1066, Type IV, composition 1, 300 by 300 mm,
3 mm 12 by 12 inches, 1/8 inch, thick.
2.3
FRAMING-JOINING SYSTEM
The panels shall be joined and supported by specially designed members that
clamp the edges of the panels and provide continuous, uniform, and constant
pressure contact against the shielding elements of the panels. The walls
shall be self-supporting from floor to ceiling with no bracing. Deflection
of walls under a static load of 35 kg 75 pounds applied normal to the wall
surface at any point along the framing members shall not exceed 1/250 of
the span between supports. [Ceilings shall be self-supporting from wall to
wall.] [Ceilings shall be supported by adjustable, nonconducting, isolated
hangers from the structural ceiling above.] Ceilings shall be designed to
have a deflection under total weight, including ceiling finish, of not more
than 1/270 of the span. At corner intersections of walls, floor, or
ceiling, provide a one-piece factory prewelded corner section or trihedral
corner framed with brass machined cast corner cap assemblies consisting of
inner and outer parts. The modular enclosure shall be designed for ease of
erection, disassembly, and re-assembly.
2.3.1
Channels
The framing-joining system members shall consist of 3 mm 1/8 inch
zinc-plated steel channels having minimum 16 mm 5/8 inch overlap along each
side of the contacting surface. Screw fasteners shall be spaced at 75 or
100 mm 3 or 4 inch intervals.
SECTION 13093N
Page 11
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