A. Lath and Plaster:
1. Wood Lath:
a. Maximum stud or furring spacing, sixteen inches (16") on center.
b. Lath, No. 1, five-sixteenths inch (5/16") thick.
c. Space lath one-fourth inch (1/4") to three-eighths inch (3/8") apart; break joints every seventh lath; nail at each bearing.
2. Expanded Metal Lath:
a. Painted or galvanized lath.
b. Minimum weights, maximum spacing of supports as follows:
Use
|
Pounds per yd.
|
Stud spacing - in.
|
Use
|
Pounds per yd.
|
Stud spacing - in.
|
Walls: | ||
All dwellings | 2.5 | 16 |
1 story dwellings | x 3.4 | 20 |
x 4.0 | 24 | |
xx 3.0 | 24 | |
Joist Spacing - in. | ||
Ceilings: | x 2.75 | 16 |
3.4 | 16 | |
xx 3.4 | 24 | |
3. Insulating Fiberboard Lath:
a. Minimum thickness, one-half inch (1/2").
b. Lath size, eighteen inches (18") by forty eight inches (48"). Lath of twenty four inches (24") by forty eight inches (48") may be used provided all joints at right angles to the framing members are covered with continuous strips of metal lath and ends of lath are nailed to solid bearing (framing members) at approximately four inches (4") on center including intermediate supports.
c. Maximum stud or joist spacing, sixteen inches (16") on center.
d. Apply in accordance with manufacturer's directions.
4. Gypsum Lath:
a. Minimum thickness, three-eighths inch (3/8").
b. Size, sixteen inches (16") by forty eight inches (48").
c. Maximum stud or joist spacing, sixteen inches (16") on center.
d. Apply in accordance with manufacturer's directions.
5. Lathing:
a. Heads of openings: Install lath so vertical joints of first course of lath above head will not occur on jamb studs.
b. Corner beads: Galvanized metal for all external corners.
c. Corner and joint reinforcing: Metal lath two and one-half inch (21/2") lap on each surface.
d. Over solid wood surfaces: Install metal lath on strips or use furring nails. Lap metal lath on adjoining lath surfaces.
6. Plaster:
a. Mix all plaster (lime and prepared) according to manufacturer's recommendations.
b. Quick lime, slake thoroughly.
c. Minimum thickness, one-half inch (1/2") over lath base. Finish all ceilings level and walls and corners plumb and straight.
7. Drying Periods: Allow sufficient time for plaster to dry thoroughly before application of trim.
B. Ceramic Tile:
1. Materials.
2. Grade: To be at least standard grade.
3. Installation:
a. Stud covering: Fifteen (15) pound asphalt saturated felt applied shingle style (unless metal lath is paper-backed).
b. Metal lath: See subsection A2 of this Section.
c. Scratch coat: Portland cement plaster, minimum five- eighths inch (5/8") thick, integrally waterproofed. Scratch thoroughly. Allow to dry before installing tile.
C. Shower Walls:
1. Materials: Dense and water repellant. Plaster not acceptable.
2. Installation:
a. Install in accordance with manufacturer's instructions.
b. Minimum height, not below shower head.
c. Caulk and protect joints at corners, bathtub, top edges of wainscot and at intersections of wainscot and other materials. Use moldings designed for the purpose or other materials satisfactory to the Building Official.
D. Dry Wall Finish:
1. Minimum Thickness:
Actual Inches | |||
Type of wall finish
|
Spacing of studs or furring strips
| ||
16
|
20
|
24
| |
Wood boards | 3/8 | 1/2 | 1/2 |
Plywood | 1/4 | 3/8 | 3/8 |
Gypsum board | 3/8 | 1/2 | 1/2 |
Fiber board | 1/2 | 3/4 | 3/4 |
2. Other types of boards, including compressed dense composition board less than one-half inch (1/2") thick, may be used when acceptable to the Building Official. Maximum stud spacing, sixteen inches (16") on center.
E. Heater Room Interior Finish:
1. Materials: One hour fire-resistive construction. See NBFU- Building Code-55.
2. Installation: Apply over all combustible materials, including ceiling area, within four feet (4') of heating unit and flue pipe. (Ord. 0-71-12, 3-11-71)