ASTM F1932/F1932M-98(2011)e1
(Test Method)Standard Test Method for Measuring Sleeping Bag Loft
Standard Test Method for Measuring Sleeping Bag Loft
SIGNIFICANCE AND USE
3.1 In this context, this test method can be used for specifications, design, and quality control. Loft, in and of itself, is not to be used to predict the thermal properties of a sleeping bag.
SCOPE
1.1 This test method covers the determination of the loft of a sleeping bag under a standardized load.
1.2 The test method uses a physical height measurement applicable in the laboratory.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the test method.
1.4 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 consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: F1932/F1932M − 98 (Reapproved 2011) An American National Standard
Standard Test Method for
Measuring Sleeping Bag Loft
This standard is issued under the fixed designation F1932/F1932M; 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 (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Editorially corrected standard designation in December 2013.
INTRODUCTION
The loft (that is, thickness) of a sleeping bag refers to the total thickness of a closed sleeping bag.
It is a physical dimension/measurement used for specifications, design, and quality control. Loft, in
and of itself, is not to be used to predict the thermal properties of a sleeping bag.
1. Scope 3. Significance and Use
3.1 In this context, this test method can be used for
1.1 This test method covers the determination of the loft of
specifications, design, and quality control. Loft, in and of itself,
a sleeping bag under a standardized load.
is not to be used to predict the thermal properties of a sleeping
1.2 The test method uses a physical height measurement
bag.
applicable in the laboratory.
4. Apparatus
1.3 The values stated in either SI units or inch-pound units
4.1 Gantry, a rigid structure of sufficient height and width to
are to be regarded separately as standard. Within the text, the
span all sleeping bags to be measured is required. A purpose-
inch-pound units are shown in brackets. The values stated in
built device of the sort shown in Fig. 1 may be used, or a
each system are not exact equivalents; therefore, each system
structure as simple as an office desk or workbench can suffice.
shall be used independently of the other. Combining values
4.2 Rule, having 1-mm [ ⁄16-in.] graduations, and long
from the two systems may result in nonconformance with the
enough to measure the zero height position.
test method.
4.3 Disk, having diameter of 30 cm [12 in.]. The weight of
1.4 This standard does not purport to address all of the
the disk plus the rule must equal 50 g [1.8 oz] for a pressure of
safety concerns, if any, associated with its use. It is the
6.9 Pa [0.001 psi]. Commercially available foam core dry-
responsibility of the user of this standard to consult and
mount board is suitable. A range of 61 % in diameter and
establish appropriate safety and health practices and deter-
65 % in weight is tolerable. Mark the center of the disk for
mine the applicability of regulatory limitations prior to use.
positioning the rule during the test procedure.
5. Conditioning
2. Terminology
5.1 Remove the sleeping bag from the stuff sack, zip the bag
2.1 Definitions:
closed, and shake it for approximately 1 min, (for example, a
2.1.1 loft, n—the total thickness of a closed sleeping bag as
person shall hold the bag and shake it, turning it periodically
measured while the bag is lying flat on a surface.
during the shaking). Lay it flat in an uncompressed state for at
2.1.2 sleeping bag, n—a structure made of down, synthetic
least 24 h prior to testing. A bag that has not been compressed
fiberfill, shell fabrics, or other materials, or a combination
in the 24 h prior to testing shall be considered to be conditioned
thereof, that is designed for people to use for thermal protec-
(for example, bags drawn directly from production, bags
tion when sleeping (for example, outdoors, tent, cabin).
shipped uncompressed, replicate tests).
6. Procedure
6.1 Perform conditioning and testing at ambient tempera-
This test method is under the jurisdiction of ASTM Committee F08 on Sports
turesbetween10°Cand25°C[55°Fand80°F],andatarelative
Equipment, Playing Surfaces, and Facilities and is the direct responsibility of
Subcommittee F08.22 on Camping Softgoods. humidity not exceeding 70 %.
Current edition approved April 1, 2011. Published June 2011. Originally
6.2 Place the conditioned sleeping bag on a large flat surface
approved in 1998. Last previous edition approved in 2004 as F193
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
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Designation: F1932 − 98 (Reapproved 2011) F1932/F1932M − 98 (ReapprovedAn American201National1) Standard
Standard Test Method for
Measuring Sleeping Bag Loft
This standard is issued under the fixed designation F1932;F1932/F1932M; 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 (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Editorially corrected standard designation in December 2013.
INTRODUCTION
The loft (that is, thickness) of a sleeping bag refers to the total thickness of a closed sleeping bag.
It is a physical dimension/measurement used for specifications, design, and quality control. Loft, in
and of itself, is not to be used to predict the thermal properties of a sleeping bag.
1. Scope
1.1 This test method covers the determination of the loft of a sleeping bag under a standardized load.
1.2 The test method uses a physical height measurement applicable in the laboratory.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the
inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall
be used independently of the other. Combining values from the two systems may result in nonconformance with the test method.
1.4 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 consult and establish appropriate safety and health practices and determine the applicability of
regulatory limitations prior to use.
2. Terminology
2.1 Definitions:
2.1.1 loft, n—the total thickness of a closed sleeping bag as measured while the bag is lying flat on a surface.
2.1.2 sleeping bag, n—a structure made of down, synthetic fiberfill, shell fabrics, or other materials, or a combination thereof,
that is designed for people to use for thermal protection when sleeping (for example, outdoors, tent, cabin).
3. Significance and Use
3.1 In this context, this test method can be used for specifications, design, and quality control. Loft, in and of itself, is not to
be used to predict the thermal properties of a sleeping bag.
4. Apparatus
4.1 Gantry, a rigid structure of sufficient height and width to span all sleeping bags to be measured is required. A purpose-built
device of the sort shown in Fig. 1 may be used, or a structure as simple as an office desk or workbench can suffice.
4.2 Rule, having 1-mm [ ⁄16-in.] graduations, and long enough to measure the zero height position.
4.3 Disk, having diameter of 30 cm [12 in.]. The weight of the disk plus the rule must equal 50 g [1.8 oz] for a pressure of 6.9
Pa [0.001 psi]. Commercially available foam core drymount board is suitable. A range of 61 % in diameter and 65 % in weight
is tolerable. Mark the center of the disk for positioning the rule during the test procedure.
5. Conditioning
5.1 Remove the sleeping bag from the stuff sack, zip the bag closed, and shake it for approximately 1 min, (for example, a
person shall hold the bag and shake it, turning it periodically during the shaking). Lay it flat in an uncompressed state for at least
This test method is under the jurisdiction of ASTM Committee F08 on Sports Equipment Equipment, Playing Surfaces, and Facilities and is the direct responsibility of
Subcommittee F08.22 on Camping Softgoods.
Current edition approved April 1, 2011. Published June 2011. Originally approved in 1998. Last previous edition approved in 2004 as F1932 - 98F1932 – 98 (2004). DOI:
10.1520/F1932-98R11.10.1520/F1932_F1932M-98R11E01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F1932/F1932
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