ASTM F1932-98

Standard Test Method for Measuring Sleeping Bag Loft

SCOPE
1.1 This quantitative test method covers the determination of the loft of a sleeping bag under a stanardized 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Nov-1998
• ICS: 97.200.30 - Camping equipment and camp-sites
• Technical Committee: F08 - Sports Equipment, Playing Surfaces, and Facilities
• Drafting Committee: F08.22 - Camping Softgoods

Relations

• Replaced By: ASTM F1932-98(2004) - Standard Test Method for Measuring Sleeping Bag Loft
• Effective Date: 01-May-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation: F 1932 – 98
Standard Test Method for
Measuring Sleeping Bag Loft
This standard is issued under the fixed designation F 1932; 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.
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 4. Apparatus
1.1 This quantitative test method covers the determination 4.1 Gantry, a rigid structure of sufficient height and width to
of the loft of a sleeping bag under a standardized load. span all sleeping bags to be measured is required. A purpose-
1.2 The test method uses a physical height measurement built device of the sort shown in Fig. 1 may be used, or a
applicable in the laboratory. structure as simple as an office desk or workbench can suffice.
1.3 The values stated in either SI units or inch-pound units 4.2 Rule, having 1 mm [ ⁄16 in.] graduations, and long
are to be regarded separately as standard. Within the text, the enough to measure the zero height position.
inch-pound units are shown in brackets. The values stated in 4.3 Disk, having diameter of 30 cm [12 in.]. The weight of
each system are not exact equivalents; therefore, each system the disk plus the rule must equal 50 g [1.8 oz] for a pressure of
shall be used independently of the other. Combining values 6.9 Pa [0.001 psi]. Commercially available foam core dry-
from the two systems may result in nonconformance with the mount board is suitable. A range of 6 1 % in diameter and6
test method. 5 % in weight is tolerable. Mark the center of the disk for
1.4 This standard does not purport to address all of the positioning the rule during the test procedure.
safety concerns, if any, associated with its use. It is the
5. Conditioning
responsibility of the user of this standard to consult and
establish appropriate safety and health practices and deter- 5.1 Remove the sleeping bag from the stuff sack, zip the bag
closed, and shake it for approximately 1 min, (for example, a
mine the applicability of regulatory limitations prior to use.
person shall hold the bag and shake it, turning it periodically
2. Terminology
during the shaking). Lay it flat in an uncompressed state for at
2.1 Definitions: least 24 h prior to testing. A bag which has not been
2.1.1 loft, n—the total thickness of a closed sleeping bag as compressed in the 24 h prior to testing shall be considered to
measured while the bag is lying flat on a surface. be conditioned (for example, bags drawn directly from produc-
2.1.2 sleeping bag, n—a structure made of down, synthetic tion, bags shipped uncompressed, replicate tests).
fiberfill, shell fabrics, or other materials, or combination
6. Procedure
thereof, that is designed for people to use for thermal protec-
tion when sleeping (for example, outdoors, tent, cabin). 6.1 Perform conditioning and testing at ambient tempera-
tures between 10°C and 25°C [55°F and 80°F], and at a relative
3. Significance and Use
humidity not exceeding 70 %.
3.1 In this context this test can be used for specifications, 6.2 Place the conditioned sleeping bag on a large flat surface
design, and quality control. Loft, in and of itself, is not to be and place the gantry on the same surface, spanning the bag. Do
used to predict the thermal properties of a sleeping bag. not excessively shake or refluff the sleeping bag during
placement. Allow the bag to settle for 5 min.
6.3 Place the disk on the center line of
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