wide expansion wings, front edge of face flange shaved for intended use,
back slightly arched to provide a spring effect.
2.5.10
Control Joints
Control joints shall be designed for expansion and contraction of plaster
work due to thermal exposure. Control joints shall be fabricated of
[vinyl] [0.55 mm 0.0217 inch thick galvanized steel for interior
applications] [or] [0.76 mm 0.030 inch thick zinc alloy for exterior
applications], with perforated or expanded-metal wings.
2.5.11
Reveal Molding
Reveal moldings shall be fabricated of [aluminum] [vinyl] [galvanized
steel] [or] [zinc]. Reveal molding shall be size and shape as shown.
2.5.12
Raidused Column Trim
Raidused column moldings shall be fabricated of aluminum and shall be shape
and sizes as shown.
2.5.13
Screws
Self-drill steel screws shall conform to ASTM C 1002. Screws shall be
[Type S for use with steel framing] [and] [Type W for use with wood
members].
2.6
METAL LATH
**************************************************************************
NOTE: Where lath is to be used over solid backing,
self-furring crimps will provide 6 mm (1/4 in)
projection from solid backing. Use lath with
backing for stud construction.
**************************************************************************
2.6.1
Expanded Metal Lath
Expanded metal lath shall conform to ASTM C 847. Lath shall be [flat base
lath] [self-furring lath] [flat rib lath] [rib lath], expanded from
cold-rolled carbon sheet steel of commercial quality, coated with
rust-inhibitive paint after fabrication, 1.8 kg per square meter 3.4 pounds
per square yard, [with backing] [without backing].
2.6.2
Welded Wire Lath
Welded wire lath shall conform to ASTM C 933. Lath shall be [flat base]
[self-furring] type, fabricated from not less than 1.6 mm 0.0625 inch
copper-bearing, cold-drawn, galvanized steel wire, [with backing] [without
backing].
2.6.3
Woven Wire Lath
Woven wire lath shall conform to ASTM C 1032. Lath shall be [flat base]
[self-furring] type [with stiffeners] [without stiffeners], [with backing]
[without backing] fabricated from copper-bearing, cold-drawn, galvanized
steel wire not less than 1.40 mm 0.0548 inch thick, with openings not to
exceed 50 x 50 mm 2 x 2 inch welded.
SECTION 09200A
Page 11
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