ASTM C1244-93(2000)
(Test Method)Standard Test Method for Concrete Sewer Manholes by the Negative Air Pressure (Vacuum) Test Prior to Backfill
Standard Test Method for Concrete Sewer Manholes by the Negative Air Pressure (Vacuum) Test Prior to Backfill
SCOPE
1.1 This test method covers procedures for testing precast concrete manhole sections when using the vacuum test method to demonstrate the integrity of the installed materials and the construction procedures. This test method is used for testing concrete manhole sections utilizing mortar, mastic, or gasketed joints.
1.2 This test method is intended to be used as a preliminary test to enable the installer to demonstrate the condition of the concrete manholes prior to backfill.
1.3 This standard does not purport to address all of the safety problems, 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.
1.4 This test method is the companion to metric Test Method C 1244M; therefore, no SI equivalents are shown in this test method.
Note 1—Vacuum test criteria presented in this test method are similar to those in general use. The test and criteria have been widely and successfully used in testing manholes.
Note 2—It should be understood that no correlation has been found between vacuum (air) and hydrostatic tests.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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Designation: C 1244 – 93 (Reapproved 2000)
Standard Test Method for
Concrete Sewer Manholes by the Negative Air Pressure
(Vacuum) Test
This standard is issued under the fixed designation C 1244; 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.
TABLE 1 Minimum Test Times for Various Manhole Diameters in
1. Scope
Seconds
1.1 This test method covers procedures for testing precast
Diameter, in.
concrete manhole sections when using the vacuum test method
Depth (ft)
30 33 36 42 48 54 60 66 72
to demonstrate the integrity of the installed materials and the
Time, in seconds
construction procedures. This test method is used for testing
concrete manhole sections utilizing mortar, mastic, or gasketed 8 11 12 141720 23 26 29 33
10 14 15 18 21 25 29 33 36 41
joints.
12 17 18 21 25 30 35 39 43 49
1.2 This test method is intended to be used as a preliminary
14 20 21 25 30 35 41 46 51 57
test to enable the installer to demonstrate the condition of the 16 22 24 39 34 40 46 52 58 67
18 25 27 32 38 45 52 59 65 73
concrete manholes prior to backfill. It may also be used to test
20 28 30 35 42 50 53 65 72 81
manholes after backfilling; however, testing should be corre-
22 31 33 39 46 55 64 72 79 89
24 33 36 42 51 59 64 78 87 97
lated with the connector supplier.
26 36 39 46 55 64 75 85 94 105
1.3 This standard does not purport to address all of the
28 39 42 49 59 69 81 91 101 113
safety problems, if any, associated with its use. It is the
30 42 45 53 63 74 87 98 108 121
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Summary of Practice
1.4 This test method is the companion to metric Test
4.1 All lift holes and any pipes entering the manhole are to
Method C 1244M; therefore, no SI equivalents are shown in
be plugged. A vacuum will be drawn and the vacuum drop over
this test method.
a specified time period is used to determine the acceptability of
NOTE 1—Vacuum test criteria presented in this test method are similar
the manhole.
to those in general use. The test and criteria have been widely and
successfully used in testing manholes. 5. Significance and Use
NOTE 2—It should be understood that no correlation has been found
5.1 This is not a routine test. The values recorded are
between vacuum (air) and hydrostatic tests.
applicable only to the manhole being tested and at the time of
testing.
2. Referenced Documents
2.1 ASTM Standards:
6. Preparation of the Manhole
C 822 Terminology Relating to Concrete Pipe and Related
6.1 All lift holes shall be plugged.
Products
6.2 All pipes entering the manhole shall be temporarily
C 924 Practice for Testing Concrete Pipe Sewer Lines by
plugged, taking care to securely brace the pipes and plugs to
Low-Pressure Air Test Method
prevent them from being drawn into the manhole.
C 969 Practice for Infiltration and Exfiltration Acceptance
Testing of Installed Precast Concrete Pipe Sewer Lines
7. Procedure
7.1 The test head shall be placed at the top of the manhole
3. Terminology
in accordance with the manufacturer’s recommendations.
3.1 For definitions of terms relating to manholes, see
7.2 A vacuum of 10 in. of mercury shall be drawn on the
Terminology C 822.
manhole, the valve on the vacuum line of the test head closed,
and the vacuum pump shut off. The time shall be measured for
This practice is under the jurisdiction of ASTM Committee C13 on Concrete
the vacuum to drop to 9 in. of mercury.
Pipe and is the direct responsibility of Subcommittee C13.06 on Manholes and
7.3 The manhole shall pass if the time for the vacuum
Specials.
reading to drop from 10 in. of mercury to 9 in. of mercury
Current edition approved Aug. 15, 1993. Published October 1993.
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