1. Rationale
The present language in 5.1.2 refers to heavy-duty lath with wire stiffeners. These terms are confusing and misleading in terms of determining what heavy duty lath is and what it is not. The weight of welded wire laths in C 933 ranges from 1.14 lb/yd2 to 1.95 lb/yd2 for both regular and what is termed in 5.1.2 as heavy duty laths. In C1063 two minimum weight thresholds are established, one that has a minimum weight of 1.14 lb/yd2 and the second group with a minimum weight of 1.95 lb/yd2. There is no differentiation between heavy duty or light duty or any other duty. Therefore, it is proposed to remove the term heavy-duty in this section and refer to heavier wires that may be introduced. Secondly, the reference to stiffened continuously and wire stiffeners is misleading in that since the wire are circular, there is no substantial increase in stiffness of the wire lath. Therefore, it is proposed that the words stiffened or stiffener be removed so that there is no misconception or confusion in regard to the stiffness of the lath. Proposed Language: 5.1.2 Heavier wires may be placed continuously and parallel to the long dimensions of the lath at intervals of not more than 6 inches (152 mm). Wires used for this purpose shall range from 15 gauge (0.072 m) to 11 gauge (0.1205 m). The nominal weight per square yard shall range from 1.14 to 1.95 lb/yd2 (0.68 to 1.058 kg/m2) Existing Language: 5.1.2Heavy-duty lath shall be stiffened continuously and parallel to the long dimensions of the lath at intervals of not more than 6 in. (1.52mm). Wire stiffeners used for this purpose shall range from 15-guage (0.072 in) to 11-guage (0.1205 in). The weight per square yard shall range from 1.14 to 1.95 lb/yd2 (0.1618 to 1.058kg/m2) for the heavy-duty lath.
Keywords
lath; metal plaster base; plaster; self-furring lath; stucco; wire lath; Gypsum products--lath (specifications); Gypsum products--specifications; Metal lath; Steel wire lath; Welded steel wire--specifications;
Citing ASTM Standards
[Back to Top]
