ASTM C645-00
(Specification)Standard Specification for Nonstructural Steel Framing Members
Standard Specification for Nonstructural Steel Framing Members
SCOPE
1.1 This specification covers nonstructural steel framing members in interior construction assemblies.
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI (metric) values given in parentheses are for information purposes only.
1.3 The following safety hazards caveat pertains only to the test method portion, Sections 9 and 10, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 645 – 00
Standard Specification for
Nonstructural Steel Framing Members
This standard is issued under the fixed designation C 645; 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 * cross furring members of grid suspension systems or other
items manufactured in accordance with this specification.
1.1 This specification covers nonstructural steel framing
3.2.2 nonstructural wall stud, n—a member in a steel
members in interior construction assemblies.
framed wall system which is limited to a lateral (transverse)
1.2 The values stated in inch-pound units are to be regarded
load of not more than 10 lb/ft (480 Pa), a superimposed
as the standard. The SI (metric) values given in parentheses are
vertical load, exclusive of sheathing materials, of not more than
provided for information purposes only.
100 lbf/ft (1460 N/m), or a superimposed vertical load of not
1.3 The following safety hazards caveat pertains only to the
more than 200 lbs (890 N).
test methods portion, Sections 9 and 10, of this specification:
This standard does not purport to address all of the safety
4. Materials and Manufacture
concerns, if any, associated with its use. It is the responsibility
4.1 Members shall be manufactured from steel that meets
of the user of this standard to establish appropriate safety and
the mechanical requirements of the AISI Specification for the
health practices and determine the applicability of regulatory
Design of Cold-Formed Steel Structural Members (1996 Edi-
limitations prior to use.
tion).
2. Referenced Documents 4.2 Members shall have a protective coating conforming to
Specification A 653/A 653M–G40 minimum or shall have a
2.1 ASTM Standards:
protective coating with an equivalent corrosion resistance.
A 653/A 653M Specification for Zinc-Coated (Galvanized)
4.3 Members shall be manufactured from steel having a
or Zinc-Iron Alloy-Coated (Galvanized) by the Hot-
minimum thickness, individual measurement of 0.0179 in.
Dipped Process
(0.455 mm) before application of protective coating.
C 11 Terminology Relating to Gypsum and Related Build-
ing Materials and Systems
5. Dimensions and Permissible Variations
C 1002 Specification for Steel Drill Screws for the Appli-
3 5.1 Studs and rigid furring channels shall have a configu-
cation of Gypsum Board or Metal Plaster Bases
ration and steel thickness such that the system in which they
2.2 AISI Standard:
are used will carry the design transverse loads without exceed-
Specification for the Design of Cold-Formed Steel Struc-
4 ing either the allowable stress of the steel or the allowable
tural Members
design deflection. Main beams and cross furring of grid
3. Terminology suspension systems shall be limited to a deflection of L/240.
The manufacturer shall supply sufficient data for calculating
3.1 Definitions—Definitions shall be in accordance with
design performance.
Terminology C 11.
3.2 Definitions of Terms Specific to This Standard:
NOTE 1—Allowable deflection varies depending on the cladding used
3.2.1 members, n—in screw application of gypsum board,
and architectural requirements. Detailed requirements shall be specified in
application specifications.
studs, runners (track), hat furring channels, main beams and
5.1.1 Members, except main beams of grid suspension
1 systems, shall be sufficiently rigid to permit penetration of the
This specification is under the jurisdiction of ASTM Committee C-11 on
Gypsum and Related Building Materials and Systems and is the direct responsibility screw.
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
5.1.2 Minimum width of face to which gypsum board is
Related Products.
screw-attached shall be not less than 1 ⁄4 in. (32 mm).
Current edition approved Jan. 10, 2000. Published March 2000. Originally
5.1.3 Minimum lip dimension shall be ⁄16 in. (5 mm). See
published as C 645 – 70. Last previous edition C 645 – 99.
Annual Book of ASTM Standards, Vol 01.06.
Appendix X1, Fig. X1.1.
Annual Book of ASTM Standards, Vol 04.01.
5.2 Members shall be manufactured within the limits as
Available from the American Iron and Steel Institute, 1000 16th St. N.W.,
shown in Table 1 and Fig. 1.
Washington, DC 20036.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C645–00
TABLE 1 Manufacturing Tolerances
to determine compliance with this specification. The degree of
Drywall Studs, Drywall Track, performance of this test method with service performance has
A
Dimension Item Checked
in. (mm) in. (mm)
not been determined.
A length + ⁄8 (3.18) + 1 (25.40)
10.2 Apparatus shall satisfy the following:
1 1
− ⁄4 (6.35) − ⁄4 (6.35)
10.2.1 Electric Drill, capable of 2500 r/min (free spindle
B
1 1
B web width + ⁄32 (0.79) + ⁄8 (3.18)
1 speed), supplied with a screw driving bit to fit the screw used
− ⁄32 (0.79) − 0 (0)
C flare + ⁄16 (1.59) + 0 (0)
in the test.
1 3
overbend − ⁄16 (1.59) − ⁄16 (4.76)
10.2.2 Stop Watch, capable of being read to the nearest 0.1
D hole center + ⁄8 (3.18) NA
s.
width − ⁄8 (3.18)
E hole center + ⁄4 (6.35) NA
10.3 Materials shall satisfy the following:
length − ⁄4 (6.35)
10.3.1 Wallboard—Specification C 36, Type X, ⁄8 in. (16
1 1
F crown + ⁄8 (3.18) + ⁄8 (3.18)
1 1
mm) thick.
− ⁄8 (3.18) − ⁄8 (3.18)
1 1
G camber ⁄32 per ft (0.79) ⁄32per ft (0.79)
10.3.2 Screws—Specification C 1002, Type S, 1 in. (25.4
1 1
⁄2 max (12.7) ⁄2 max (12.7)
mm) long.
1 1
H bow ⁄32per ft (0.79) ⁄32per ft (0.79)
1 1
⁄2 max (12.7) ⁄2 max (12.7) 10.3.3 Kraft Paper—0.010 in. (0.254 mm) thick.
1 1
I twist ⁄32 per ft (0.79) ⁄32per ft (0.79)
10.4 Sampling—One member shall be selected from each
1 1
⁄2 max (12.7) ⁄2 max (12.7)
bundle or package but not more than ten from any one
A
All measurements shall be taken not less than 1 ft (305 mm) from the end.
shipment for testing.
B
Outside dimension for stud; inside for track.
10.5 Specimen Preparation:
10.5.1 Each member to be tested shall be cut into test
5.3 Rigid Furring Channels—Minimum depth shall be ⁄8
specimens not less than 18 in. (460 mm) long.
in. (22 mm). Minimum width of furring attachment flanges (see
10.5.2 For each test, one piece of wallboard, 6 in. (12.7 mm)
Fig. 2) shall be ⁄2 in. (12.7 mm).
square, shall be cut from not less than 12 in. (305 mm) from the
5.4 Grid suspension systems include main beams and cross
edge or end of the wallboard.
furring members which mechanically interlock to form a
10.5.3 For each test, four pieces of kraft paper, 2 in. (51
modular supporting network. Length tolerance for grid suspen-
mm) square shall be cut.
sion members shall be 6 ⁄16 in. (1.59 mm).
10.6 Procedure—Assemble the member, gypsum board and
5.5 Runners (track) shall be formed in a U-shaped configu-
kraft paper on a rigid, flat surface. (See Fig. 3 for studs, Fig. 2
ration, having web depth compatible with those of the studs of
for furring channels.) Drive the screw, using the electric drill
the same nominal size. The runners (track) shall be designed
while applying a force (dead weight and applied force) of 25
such that when the studs are placed in both the top and bottom
lbf (112.2 N). Drive the screw to slightly below the surface of
runners (track), they are held by friction. Minimum height of
the gypsum board. Note if the screw has spun out and the
flanges shall be 1 in. (25 mm).
length of time it takes to pull the head of the screw below the
surface.
6. Edges
10.7 Number of Tests and Retests:
6.1 Members shall be manufactured in such a fashion as to
10.7.1 Five specimens of members shall be tested.
minimize burrs and sharp edges.
10.7.2 If more than one test specimen fails to meet the
requirements, two more test specimens shall be chosen for
7. Cutouts
retesting.
7.1 Cutouts shall not reduce the performance of the mem-
10.8 Report—Report shall indicate all specimens meeting
bers in the gypsum board construction assembly below the
the requirements of this specification if the time read from the
specified performance requirements.
stop watch is less than the time specified in Section 9, and the
screw did not spin out; or shall indicate all failing if the time
8. Sectional Prope
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