ASTM C1063-03

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Designation: C 1063 – 03
Standard Specification for
Installation of Lathing and Furring to Receive Interior and
Exterior Portland Cement-Based Plaster
This standard is issued under the fixed designation C 1063; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope C 847 Specification for Metal Lath
C 926 Specification for Application of Portland Cement-
1.1 This specification covers the minimum requirements for
Based Plaster
lathing and furring for the application of exterior and interior
C 933 Specification for Welded Wire Lath
portland cement-based plaster as in Specification C 926.
C 954 Specification for Steel Drill Screws for the Applica-
1.2 Where a fire resistance rating is required for plastered
tion of Gypsum Panel Products or Metal Plastic Bases to
assembliesandconstructions,detailsofconstructionshallbein
Steel Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84
accordance with reports of fire tests of assemblies that have
mm) in Thickness
met the requirements of the fire rating imposed.
C 1002 Specification for Steel Drill Screws for the Appli-
1.3 Where a specific degree of sound control is required for
cation of Gypsum Panel Products or Metal Plaster Bases
plastered assemblies and constructions, details of construction
C 1032 Specification for Woven Wire Plaster Base
shallbeinaccordancewithofficialreportsoftestsconductedin
D 1784 Specification for Rigid Poly(Vinyl Chloride) (PVC)
recognized testing laboratories in accordance with the appli-
Compounds and Chlorinated Poly(Vinyl Chloride)
cable requirements of Test Method E 90.
(CPVC) Compounds
1.4 The values stated in inch-pound units are to be regarded
D 4216 Specification for Rigid Poly(Vinyl Chloride) (PVC)
as the standard.The SI (metric) values given in parentheses are
and Related Plastic Building Products Compounds
approximate and are provided for information purposes only.
E 90 Test Method for Laboratory Measurement of
2. Referenced Documents Airborne-Sound Transmission Loss of Building Partitions
2.1 ASTM Standards:
3. Terminology
A 526/A 526M Specification for Steel Sheet, Zinc-Coated
3.1 Definitions—For definitions relating to Ceilings and
(Galvanized) by the Hot-Dip Process, Commercial Qual-
2 Walls, see Terminology C 11.
ity
3.2 Definitions of Terms Specific to This Standard:
A 641/A 641M Specification for Zinc-Coated (Galvanized)
3 3.2.1 hangers—wires or steel rods or straps used to support
Carbon Steel Wire
main runners for suspended ceilings beneath floor or roof
B 69 Specification for Rolled Zinc
constructions.
B 221 Specification for Aluminum-Alloy Extruded Bars,
3.2.2 inserts—devices embedded in concrete structural
Rods, Wire, Profiles, and Tubes
members to provide a loop or opening for attachment of
C 11 Terminology Relating to Gypsum and Related Build-
hangers.
ing Materials and Systems
3.2.3 saddle tie—see Figs. 1 and 2.
C 841 Specification for Installation of Interior Lathing and
3.2.4 self-furring—a metal plaster base manufactured with
Furring
evenly-spaced indentations that hold the body of the lath
approximately ⁄4 in. (6.4 mm) away from solid surfaces to
This specification is under the jurisdiction of ASTM Committee C11 on
which it is applied.
Gypsum and Related Building Materials and Systems and is the direct responsibility
3.2.5 framing member, n—studs, joist, runners (track),
of Subcommittee C11.03 on Specifications for Application of Gypsum and Other
bridging, bracing, and related accessories manufactured or
Products in Assemblies.
Current edition approved June 10, 2003. Published August 2003. Originally
supplied in wood or light gage steel.
approved in 1986. Last previous edition approved in 1999 as C 1063 – 99.
Discontinued; see 1994 Annual Book of ASTM Standards, Vol 01.06.
Annual Book of ASTM Standards, Vol 01.06.
4 7
Annual Book of ASTM Standards, Vol 02.04. Annual Book of ASTM Standards, Vol 08.01.
5 8
Annual Book of ASTM Standards, Vol 02.02. Annual Book of ASTM Standards, Vol 08.02.
6 9
Annual Book of ASTM Standards, Vol 04.01. Annual Book of ASTM Standards, Vol 04.06.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C 1063 – 03
and to secure attachment of the accessory to the underlying
surface.Accessories shall be designed to receive application of
the specified plaster thickness.
6.2.2 Accessories shall be fabricated from ZincAlloy (99 %
pure zinc), galvanized (zinc coated) steel, rigid PVC or CPVC
plastic, or anodized aluminum alloy. See Specification B 221.
(See Table 1 for minimum allowable thicknesses).
NOTE 1—The selection of an appropriate type of material for accesso-
ries shall be determined by applicable surrounding climatic and environ-
mental conditions specific to the project location, such as salt air,
industrial pollution, high moisture, or humidity.
6.2.3 Steel—Specification A 526 and shall have a G60
coating.
6.2.4 PVC Plastic—Specification D 1784 or D 4216.
FIG. 1 Saddle Tie
6.2.5 Zinc Alloy—Specification B 69, 99 % pure zinc.
6.2.6 Thickness of base material shall be as shown in Table
1.
2 2
6.2.7 Cornerite—1.75 lb/yd (0.059 kg/m ), galvanized ex-
2 2
panded metal lath, galvanized, 1.7 lb/yd (0.057 kg/m ) galva-
nized woven or welded wire fabric of 0.0410 in. (1.04 mm)
wire. When shaped for angle reinforcing, it shall have out-
standing flanges (legs) of not less than 2 in. (51 mm).
6.3 Channels—Shall be cold-formed from steel with mini-
mum 33 000 psi (228 MPa) yield strength and 0.0538 in. (1.37
mm) minimum bare steel thickness. Channel shall have a
protective coating conforming to Specification A 653–G60, or
have a protective coating with an equivalent corrosion resis-
tance for exterior applications, or shall be coated with a rust
inhibitive paint, for interior applications, and shall have the
FIG. 2 Saddle Tie
following minimum weights in pounds per 1000 linear feet
(kg/m).
4. Delivery of Materials
Sizes, in. (mm) Weight, lb/1000 ft (kg/m) Flange Width, in. (mm)
3 1
⁄4 (19) 277 (0.412) ⁄2 (13)
4.1 All materials shall be delivered in the original packages,
1 1
1 ⁄2 (38) 414 (0.616) ⁄2 (13)
containers, or bundles bearing the brand-name and manufac-
2 (51) 506 (0.753) ⁄2 (13)
1 1
2 ⁄2 (64) 597 (0.888) ⁄2 (13)
turer’s (or supplier’s) identification.
NOTE 2—Channels used in areas subject to corrosive action of salt air
5. Storage of Materials
shall be hot-dipped galvanized, G60 coating.
5.1 All materials shall be kept dry. Materials shall be
6.3.1 External Corner Reinforcement—Expanded lath,
stacked off the ground, supported on a level platform, and
welded wire, or woven wire mesh bent to approximately 90°
protected from the weather and surface contamination.
used to reinforce portland cement stucco at external corners.
5.2 Materials shall be neatly stacked with care taken to
This accessory shall be fully embedded in the stucco.
avoid damage to edges, ends, or surfaces.
6.3.2 Foundation Weep Screed—Accessory used to termi-
5.3 Paper backed metal plaster bases shall be handled
nate portland cement based stucco at the bottom of exterior
carefully in delivery, storage, and erection to prevent punctur-
walls. This accessory shall have a sloped, solid, or perforated,
ing or removal of paper.
ground or screed flange to facilitate the removal of moisture
from the wall cavity and a vertical attachment flange not less
6. Materials
than 3 ⁄2 in. (89 mm) long.
6.1 Metal Plaster Bases:
6.4 Wire—As specified in Specification A 641 with a Class
6.1.1 Expanded Metal Lath—Specification C 847, galva- I zinc coated (galvanized), soft temper steel. Wire diameters
nized.
6.1.2 Wire Laths:
TABLE 1 Minimum Thickness of Accessories
6.1.2.1 Welded Wire Lath—Specification C 933.
Base Material, in. (mm)
6.1.2.2 Woven Wire Lath—Specification C 1032.
Accessory
Steel Zinc Alloy P.V.C.
6.1.2.3 Paper Backed Plaster Bases—Specification C 847.
6.2 Accessories: Corner Beads 0.0172 (0.44) 0.0207 (0.53) 0.035 (0.89)
Casing Beads 0.0172 (0.44) 0.0207 (0.53) 0.035 (0.89)
6.2.1 General—All accessories shall have perforated or
Weep Screeds 0.0172 (0.44) 0.0207 (0.53) 0.050 (1.27)
expanded flanges or clips shaped to permit complete embed-
Control Joints 0.0172 (0.44) 0.018 (0.46) 0.050 (1.27)
ment in the plaster, to provide means for accurate alignment,
C 1063 – 03
(uncoated)specifiedhereincorrespondwithUnitedStatesSteel 6.7.1.1 Nails for attaching metal plaster bases to solid
Wire Gage numbers as follows: substrates shall be not less than ⁄4 in. (19 mm) long.
Wire Gage Diameter (in.) 6.7.2 Screws for attaching metal plaster base shall be
(US Steel Wire Gage) mm
fabricated in accordance with either Specification C 954 or
No. 20 0.0348 .88
C 1002 and shall have a ⁄16 in. (11.1 mm) diameter pan wafer
No. 19 0.0410 1.04
No. 18 0.0475 1.21 head and a 0.120 in. (3.0 mm) diameter shank. Screws used for
No. 17 0.0540 1.37
attachment to metal framing members shall be self-drilling and
No. 16 0.0625 1.59
self-tapping. Screws used for attachment to wood framing
No. 14 0.0800 2.03
No. 13 0.0915 2.32 members shall be sharp-point.
No. 12 0.1055 2.68
No. 11 0.1205 3.06
7. Installation
No. 10 0.1350 3.43
No. 9 0.1483 3.77
7.1 Workmanship—Metal furring and lathing shall be
No. 8 0.1620 4.12
erected so that the finished plaster surfaces are true to line
6.5 Rod and Strap Hangers—Mild steel, zinc or cadmium
(allowable tolerance of ⁄4 in. [6.4 mm] in 10 ft [3.05 m]),
plated, or protected with a rust-inhibiting paint.
level, plumb, square, or curved as required to receive the
6.6 Clips—Form from steel wire, Specification A 641 zinc-
specified plaster thickness.
coated (galvanized), Specification A 641 or steel sheet, Speci-
7.2 Hangers and Inserts:
fication A 526, depending on use and manufacturer’s require-
7.2.1 Hangers shall be of ample length and shall conform to
ments.
the requirements of Table 2 both as to size and maximum area
6.7 Fasteners:
to be supported, except as modified in this section.
6.7.1 Nails—For attaching metal plaster bases to wood 7.2.2 When 1 by ⁄16-in. (25 by 4.8-mm) flat inserts and
7 7
supports,0.1205-in.11gage(3.06-mm)diameter, ⁄16-in.(11.1- hangers are used, ⁄16-in. (11.1-mm) diameter holes shall be
mm) head, barbed, galvanized roofing nails or galvanized provided on the center line at the lower end of the insert and
common nails. upper end of the hanger to permit the attachment of the hanger
1–10
TABLE 2 Allowable Support or Hanger Wire Spacing ft-in. (mm) and Cold-Rolled Channel Main Runner Spans, ft-in. (mm)
2 2
NOTE—1 in. = 25.4 mm; 1 ft = 0.093 m
Uniform Load = 12 psf (0.479 kPa)
Member Size, in. Member Weight,
9,10
Span Condition Member Spacing, in. (mm)
(mm) lb/1000 ft (kg/m)
24 (610) 36 (914) 48 (1220) 60 (1520) 72 (1830)
Allowable Hanger Wire or Support Spacing, ft-in. (mm)
1 ⁄2 414 Single 3-6 (1070) 3-1 (940) 2-9 (840) 2-9 (790) 2-5 (740)
(38.1) (0.615) 2 or More 4-11 (1500) 4-2 (1270) 3-7 (1090) 3-2 (970) 2-11 (890)
2 506 Single 3-9 (1140) 3-3 (990) 3-0 (910) 2-9 (840) 2-8 (810)
(50.8) (0.753) 2 or More 5-2 (1570) 4-6 (1370) 4-1 (1240) 3-10 (1170) 3-7 (1090)
2 ⁄2 597 Single 3-11 (1190) 3-5 (1040) 3-2 (970) 2-11 (890) 2-9 (840)
(63.5) (0.888) 2 or More 5-5 (1650) 4-9 (1450) 4-4 (1320) 4.0 (1220) 3-10 (1170)
Uniform Load = 15 psf (0.287 kPa)
Member Size, in. Member Weight,
9,10
Span Condition Member Spacing, in. (mm)
(mm) lb/1000 ft (kg/m)
24 (610) 36 (914) 48 (1220) 60 (1520) 72 (1830)
1 ⁄2 414 Single 3-3 (990) 2-10 (860) 2-7 (790) 2-4 (710) 2-2 (660)
(38.1) (0.616) 2 or More 4-6 (1370) 3-8 (1120) 3-2 (970) 2-10 (860) 2-7 (790)
2 506 Single 3-6 (1070) 3-1 (940) 2-10 (880) 2-7 (790) 2-5 (740)
(50.8) (0.753) 2 or More 4-10 (1470) 4-3 (1300) 3-10 (1170) 3-6 (1070) 3-3 (990)
2 ⁄2 597 Single 3-8 (1120) 3-3 (990) 2-11 (890) 2-9 (840) 2-7 (790)
(63.5) (0.888) 2 or More 5-0 (1520) 4-5 (1350) 4-0 (1220) 3.9 (1140) 3-6 (1070)
Allowable Spans Notes:
Bare metal thickness of cold-rolled main runners shall be not less than 0.0538 in. (1.367 mm).
Inside corner radii shall not be greater than ⁄8 in. (3.19 mm).
Spans based on upper flange of main runners laterally unbraced.
Maximum deflection limited to 1/360 of the span length.
Steel yield stress, Fy, shall be not less than 33 000 psi (228 MPa).
Uniform load 12 psf (dry density) shall be used for portland cement plaster ceilings with plaster thicknesses up to ⁄8 in. (22 mm) and 15 psf shall be used for ceil-
7 1
ings with plaster thicknesses over ⁄8 in. (22 mm) and not more than 1- ⁄4 in. (32 mm).
“2 or More” spans refers to two or more continuous, equal spans.
For the “2 or More” span condition, listed spans represent the center-to-center distance between adjacent supports.
These tables are designed for dead loads. Specific conditions such as exterior installations in high wind areas require additional engineering.
Where uplift resistance is required for suspended ceilings to resist negative forces, the architect or engineer of record shall select the method to be used.
C 1063 – 03
to the insert. The edge of the holes in both the inserts and the
hangers shall be not less than ⁄8 in. (9.5 mm) from the ends.
7.2.3 In concrete, hangers shall be attached to inserts
embedded in the concrete or to other attachment devices
designed for this purpose and able to develop full strength of
the hanger.
7.2.4 Flat,steelhangersshallbeboltedto1by ⁄16-in.(25by
4.8-mm) inserts with ⁄8-in. (9.5-mm) diameter round-head
stove bolts. (See Fig. 3.)
7.2.5 The nuts of the bolts shall be drawn up tight.
NOTE 3—Hangersrequiredtowithstandupwardwindpressuresshallbe
of a type to resist compression. Struts of formed channels shall be
permitted.
7.3 Installation of Hangers for Suspended Ceilings Under
Wood Constructions—Hangers shall be attached to supports by
any of the following methods:
7.3.1 A hole shall be drilled through the wood member not
less than 3 in. (76 mm) above the bottom with the upper end of
thewirehangerpassedthroughtheholeandtwistedthreetimes
around itself. See Fig. 4.
7.3.2 Three 12d nails shall be driven, on a downward slant,
into the sides of the wood member with not less than 1 ⁄4 in.
(31.8 mm) penetration and not less than 5 in. (127 mm) from
the bottom edges, and not more than 36 in. (914 mm) on the
center with the upper end of the wire hanger wrapped around
the nails and twisted three times around itself. See Fig. 5.
7.3.3 A loop shall be formed in the upper end of the wire
hanger and secured to the wood member by four 1 ⁄2-in.
FIG. 4 Hanger Attached to Support Through a Drilled Hole
(38.1-mm), not less than 9 gage, 0.1483-in. (3.77-mm) diam-
eter wire staples driven horizontally or on a downward slant
into the sides of the wood members, three near the upper end
of the loop and the fourth to fasten the loose end. See Fig. 6.
7.3.4 Where supports for flooring are thicker than 1 ⁄2 in.
(38.1 mm) and are spaced more than 4 ft (1.2 m) on center, 1 ⁄2
in. (38.1-mm) No. 1/0 (0.3065 in.) (7.78 mm) eye screws, or
equivalent, spaced not more than 3 ft (0.9 m) on centers shall
be screwed into the flooring supports with the upper end of the
wire hanger inserted through the eye screws and twisted three
times around itself.
7.3.5 Two holes shall be drilled in the upper end of the flat
hangers and nailed to the sides of the wood members with 12d
nails driven through the holes and clinched. Nails shall be not
less than 3 in. (76 mm) above the bottom edge of the framing
member. See Fig. 7.
7.4 Attachment of Hangers to Main Runners:
7.4.1 Wire hangers shall be saddle-tied to the runners. See
Fig. 1.
7.4.2 Smooth or threaded rod hangers shall be fastened to
the runners with special attachments appropriate to the design.
7.4.3 The lower ends of flat hangers shall be bolted to the
main runners, or bent tightly around the runners and carried up
and above the runners and bolt to the main part of the hanger.
Bolts shall be ⁄8-in. (9.5-mm) diameter, round-head stove
bolts. See Fig. 3.
FIG. 3 Flat Hanger Attached to Main Runner Using Round-Head
Stove Bolt 7.5 Installation of Main Runners:
C 1063 – 03
FIG. 5 Hanger Attached to Support Using Nails
FIG. 6 Hanger Attached to Support Using Staples
7.5.1 Minimum sizes and maximum spans and spacings of
main runners for the various spans between hangers or other
7.6.1 Minimum size and maximum spans and spacings of
supports shall be in accordance with the requirements of Table
various types of cross furring for various spans between main
2.
runners and supports shall conform to the requirements of
7.5.2 A clearance of not less than 1 in. (25 mm) shall be
Table 2.
maintained between the ends of the main runners and the
7.6.2 Cross furring shall be saddle-tied to main runners with
abutting masonry or the concrete walls, partitions, and col-
0.0625-in. 16 gage (1.59-mm) galvanized wire, or a double
umns. Where special conditions require that main runners let
strand of 0.0475-in. 18 gage (1.21-mm) galvanized wire or
into abutting masonry or concrete construction, within such
with special galvanized clips, or equivalent attachments. (See
constructions maintain a clearance of not less than 1 in. (25
Fig. 2.)
mm) from the ends and not less than ⁄4 in. (6.4 mm) from the
7.6.3 Where cross furring members are spliced, the ends
tops and si
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