138. This Contractor
shall furnish and install for the opening in the proscenium wall at the plus
twenty-eight feet two inch (28'2") level, steel curtain as shown on the
drawings. This curtain shall be built in
accordance with the specifications for the Protective Fire Curtain, which shall
apply to this curtain as hereinafter noted.
139. The curtain
shall have a rigid frame work of not less than six (6") inch channels and
the entire thickness of the curtain shall not be les than seven (7")
inches. The auditorium face of the
curtain shall be covered with number sixteen (#16) steel plates. These plates shall be bent to form shown on
the drawings and reinforced with hanging iron and spacers. All joint shall be neatly butted and backed
with splice plates. Between the
horizontal joint of the face plates, there shall be seven inch by one-eighth
inch (7" x 1/8") stiffening plates extending the full width of the
curtain.
140. The bottom of the curtain shall have a
yielding pad covered with asbestos cloth.
The back of the curtain shall be covered with vitro-asbestos boards of
not less than one (1") inch think.
These boards shall be butt-jointed and seams filled with asbestos cement
and covered with asbestos tape.
141. The sides of the
curtain shall run in and be guided throughout its travel by smoke pockets and
rigid steel guides. The smoke pockets
shall be not less than a ten (10") inch channel and a fourteen inch by
one-quarter inch (14" x 1/4") steel plate. The guides shall be built integral with the
smoke pockets and shall be not less than a three inch by two and one-half by
one-quarter inch (3" x 2-1/2" x 1/4") angle. On the plate of the smoke pocket, there shall
be an angle smoke stop, extending from the floor to a height of four
(4'0") feet above the arch. The
smoke pocket shall be bolted to wall anchors.
These wall anchors shall be furnished and installed by OTHERS.
142. The curtains
shall be hung on six (6) one-half (1/2") inch steel cables attached to the
counterweights by three-quarter (3/4") inch turnbuckles. There shall be two (2) counterweights. The counterweight frames and track shall be
of similar construction as shown on the drawings and for the Protective Fire
Curtain. For the cables there shall be a
sixteen (16") inch diameter machine turned curtain block and for each
counterweight there shall be a twenty-four (24") inch diameter head
block. All mounted on overhead channels
as specified for the Protective Fire Curtain.
143. This curtain
shall be operated electrically by an electric hoist, with emergency control and
checking as specified for the Protective Fire Curtain.
144. This Contractor
shall furnish the push buttons, limit switches, control panel and the motor but
all other electrical work shall be by OTHERS.
145. This Contractor
shall furnish and install the sheet metal guards around the bottom of the
counterweight tracks and at the plus forty foot six inch (40'6") level
shall furnish and install sheet metal guards eight (8'0") feet high
between the hangers and completely enclosing all the moving parts of the
installation.
146. This Contractor
shall give all the steel work one (1) coat of shop paint but all other painting
and decorating of the installation shall be done by OTHERS.