ASTM D4932-89(2000)e1

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e1
Designation: D 4932 – 89 (Reapproved 2000)
Standard Test Method for
Fastener Rupture and Tear Resistance of Roofing and
Waterproofing Sheets, Roll Roofing, and Shingles
This standard is issued under the fixed designation D4932; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Editorially switched from English dominant to SI dominant.
1. Scope 4.2 Laboratory data will not permit prediction of field
performance,particularlylong-termperformance,andifalltest
1.1 This test method covers the determination of the force
conditions are not the same, data may not be comparable.
needed to pull a fastener through any type of roofing or
waterproofing ply sheet, roll roofing, or shingle, or to cause
5. Apparatus
fastener failure under specified laboratory conditions.
5.1 Testing Machine— Universal or tensile testing machine
1.2 The values stated in SI units are to be regarded as the
with automatic load recording equipment, capable of cross-
standard. The values in parentheses are for information only.
head movement at a constant rate of 25.4 mm/min (1.00
1.3 This standard does not purport to address all of the
in./min).
safety concerns, if any, associated with its use. It is the
5.2 Grips—Self-aligning grips or clamps for holding the
responsibility of the user of this standard to establish appro-
free end of the test specimen and the nailer holding jig without
priate safety and health practices and determine the applica-
slippage during the test.
bility of regulatory limitations prior to use.
5.3 Nailer Holding Jig—100-mm (4-in.) length of cold-
2. Referenced Documents formed carbon steel, rectangular structural tubing with outside
nominal dimensions of 102 by 51 mm (4 by 2 in.) and 4.8-mm
2.1 ASTM Standards:
( ⁄16-in.) wall thickness, fabricated as shown in Fig. 1.
D 226 Specification for Asphalt-Saturated Organic Felt
5.4 Wood Nailers, 33 by 89−13,+1 by 102 mm (1.5 by
Used in Roofing and Waterproofing
3.5−0.5,+0.05 by 4 in.) (nominal 2 by 4 in. lumber cut to 4
3. Summary of Test Method
in. length is appropriate). Thirty nailers are required per
sample.
3.1 The force perpendicular to the fastener shank to tear the
sheet or to cause fastener failure is measured with the fastener
NOTE 1—The wood nailers must hold the fastener securely and remain
head seated and not seated (tear).
secure in the nailer holding jig during the test. The 89-mm (3.5-in.)
3.2 The force parallel to the fastener shank to rupture the dimension is critical for the nailer to be secure in the jig; the other
dimensions are not critical and may be varied so long as the nailer works.
sheet or to cause fastener failure is measured with the head
If preferred, the operator may use continuous lengths of nailer stock up to
seated (rupture, head pull-through).
1 m (40 in.) long for multiple specimens as opposed to cutting separate
nailers for each specimen.
4. Significance and Use
4.1 Test values for the resistance of specific ply sheets, roll
6. Sampling and Test Specimens
roofing,orshinglestoselectedfastenerpull-throughmayassist
6.1 Cut 15 MD specimens, 175 by 100 mm (7 by 4 in.), in
in the determination of appropriate fastener spacing. The
themachinedirection(MD)andanother15XMDspecimensin
relative behavior of different fasteners and fasteners with and
the cross-machine direction (XMD) from a representative
without caps may be evaluated.
portion of the sheet to be tested. If no particular sheet is
specified, useType 1 asphalt-saturated organic felt conforming
to the requirements prescribed in Specification D226.
This test method is under the jurisdiction of ASTM Committee D08 on
6.2 Thirty fasteners of the type to be tested are required. If
Roofing, Waterproofing, and Bituminous Material and is the direct responsibility of
no particular fastener is specified, use galvanized roofing nails
Subcommittee D08.20 on Roofing Membrane Systems.
with a 38-mm (1 ⁄2 in.) long 3.6-mm (0.1205-in.) diameter
Current edition approved March 31, 1989. Published May 1989.
Annual Book of ASTM Standards, Vol 04.04. straight shank and a 9.5-mm ( ⁄8-in.) diameter head.
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D 4932
alongsideofthenailer.Foreachspecimenthefastenershouldbecentered
with respect to the nailer width and sample width. See Fig. 3.
8.1.1 In ten of the MD specimens and ten of the XMD
specimens, seat the heads of the nails firmly, but without
crushing the sheet.
8.1.2 In the remaining five MD and five XMD specimens,
set the heads of the fasteners with a 1-mm (0.04-in.) gap
between the top of the sheet and the underside of the fastener
head or cap.
NOTE 3—A 1-mm (0.04-in.) thick feeler gage aids in establishing the
gap.
8.2 Measure the shank tear resistance on five of the ten MD
specimens with seated fasteners and all five with unseated
fasteners;similarlymeasuretheshanktearresistanceonfiveof
the ten XMD specimens with seated fasteners and all five with
unseated fasteners, as follows:
8.2.1 Clamp the tongue on the narrow side of the nailer
holding jig in the lower grip of the testing machine, and slide
the nailer into the jig so that the sheet specimens are on the
same side of the jig as the slot, and the long end of the
specimen is on top.
8.2.2 Set the grips of the testing machine 152 65mm(6 6
⁄4 in.) apart.
8.2.3 P
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