ASTM F1952-09

Standard Specification for Helmets Used for Downhill Mountain Bicycle Racing

ABSTRACT
This specification covers performance requirements for helmets used by downhill mountain bicycle riders. Studies have shown higher risk to the head and face for this sport as compared to recreational street riding; hence, this specification requires greater impact protection and provides performance criteria for chin bars on full-face helmets, but does not require full-face helmets. Retention system tests shall be performed before impact testing. The helmet can be impacted anywhere on or above the test line with the curbstone anvil in any horizontal orientation. The ambient test helmet shall be subjected to the chin bar impact test.
SCOPE
1.1 This specification covers performance requirements for helmets used by downhill mountain bicycle riders. Studies have shown higher risk to the head and face for this sport as compared to recreational street riding; hence, this specification requires greater impact protection and provides performance criteria for chin bars on full-face helmets, but does not require full-face helmets. This specification recognizes the desirability of lightweight construction and ventilation; however, it is a performance specification and is not intended to restrict design.
1.2 All testing and requirements of this specification shall be in accordance with Test Methods F 1446, except where noted herein.
1.3 Partial utilization of this standard is prohibited. Any statement of compliance with this specification must be a certification that the product meets all of the requirements of this specification in its entirety. A product that fails to meet any one of the requirements of this specification is considered to have failed this standard, and should not be sold with any indication that it meets parts of this standard.
1.4 Headgear designed to comply with this and other standards may proclaim uses as certified by the manufacturer.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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: 31-Dec-2008
• ICS: 13.340.20 - Head protective equipment
• Technical Committee: F08 - Sports Equipment, Playing Surfaces, and Facilities
• Drafting Committee: F08.53 - Headgear and Helmets

Relations

• Replaces: ASTM F1952-00 - Standard Specification for Helmets Used for Downhill Mountain Bicycle Racing
• Effective Date: 01-Jan-2009
• Replaced By: ASTM F1952-10 - Standard Specification for Helmets Used for Downhill Mountain Bicycle Racing
• Effective Date: 01-Aug-2010
• Referred By: ASTM F3175-16 - Standard Guide for Training and Equipping Search and Rescue Personnel Operating on Mountain Bikes (Mountain Bike SAR Endorsement)
• Effective Date: 01-Jan-2009

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: F1952 – 09
Standard Specification for
1
Helmets Used for Downhill Mountain Bicycle Racing
This standard is issued under the fixed designation F1952; 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.
1. Scope F1446 Test Methods for Equipment and Procedures Used in
Evaluating the Performance Characteristics of Protective
1.1 This specification covers performance requirements for
Headgear
helmets used by downhill mountain bicycle riders. Studies
have shown higher risk to the head and face for this sport as
3. Labels and Warnings
compared to recreational street riding; hence, this specification
3.1 Shall meet the requirements of Test Methods F1446.
requires greater impact protection and provides performance
3.2 Shall have the words “For downhill mountain bicycle
criteria for chin bars on full-face helmets, but does not require
racing.”
full-face helmets. This specification recognizes the desirability
of lightweight construction and ventilation; however, it is a
4. Marking the Test Line
performancespecificationandisnotintendedtorestrictdesign.
4.1 The test line is shown in Fig. 1 and shall be marked in
1.2 All testing and requirements of this specification shall
accordance with Test Methods F1446.
beinaccordancewithTestMethodsF1446,exceptwherenoted
herein.
5. Conditioning and Number of Samples
1.3 Partial utilization of this standard is prohibited. Any
5.1 Shall be in accordance with Test Methods F1446.
statement of compliance with this specification must be a
certification that the product meets all of the requirements of
6. Retention System Testing
this specification in its entirety. A product that fails to meet any
6.1 Retention system tests shall be performed before impact
one of the requirements of this specification is considered to
testing.
have failed this standard, and should not be sold with any
6.2 The ambient helmet shall be subjected to the positional
indication that it meets parts of this standard.
stability (roll-off) test in accordance with Test Methods F1446
1.4 Headgear designed to comply with this and other
using a 4-kg drop mass from a height of 0.6 m.
standards may proclaim uses as certified by the manufacturer.
6.3 The hot, cold, and wet helmets shall be subjected to the
1.5 The values stated in SI units are to be regarded as
dynamic strength retention test in accordance with Test Meth-
standard. No other units of measurement are included in this
ods F1446 using a 4-kg drop mass from a height of 0.6 m.
standard.
6.4 The retention system shall remain intact without elon-
1.6 This standard does not purport to address all of the
gating more than 30 mm.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
7. Impact Sites and Projections
priate safety and health practices and determine the applica-
7.1 Impact sites are described in Test Methods F1446.
bility of regulatory limitations prior to use.
7.2 Projections—Any unfaired projection extending more
than 7 mm from the helmet’s outer surface shall break away or
2. Referenced Documents
collapse when impacted with forces equivalent to those pro-
2
2.1 ASTM Standards:
duced by applicable impact-attenuation tests described in
Section 9.
1
This specification is under the jurisdiction ofASTM Committee F08 on Sports 7.2.1 There shall be no fixture on the helmet’s inner surface
Equipment and Facilities and is the direct responsibility of Subcommittee F08.53 on
projecting more than 2 mm into the helmet interior except
Headgear and Helmets.
occipital stabilizers and foam fit pads.
Current edition approved Jan. 1, 2009. Published February 2009. Originally
approved in 1999. Last previous edition approved in 2000 as F1952 – 00. DOI:
8. Impacting Schedule
10.1520/F1952-09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
8.1 All impacting shall be performed in accordance with
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Test Methods F1446.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F1952 – 09
HEADFORM DIMENSION
SIZE X L/2 Y R S T U
A 24.0 88.0 89.7 47.5 23.0 142.0 84.0
E 26.0 94.5 96.0 49.0 24.0 151.0 88.0
J 27.5 101.0 102.5 50.5 25.0 160.0 92.0
M 29.0 106.0 107.0 52.0 27.0 166.0 96.0
O 30.0 108.5 110.0 53.0 27.0 170.0 97.0
FIG. 1 Marking the Test Line
8.2 Helmetsshallbeim
...

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.
An American National Standard
Designation:F1952–00 Designation: F 1952 – 09
Standard Specification for
1
Helmets Used for Downhill Mountain Bicycle Racing
This standard is issued under the fixed designation F 1952; 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.
1. Scope
1.1 This specification covers performance requirements for helmets used by downhill mountain bicycle riders. Studies have
shown higher risk to the head and face for this sport as compared to recreational street riding; hence, this specification requires
greater impact protection and provides performance criteria for chin bars on full-face helmets, but does not require full-face
helmets. This specification recognizes the desirability of lightweight construction and ventilation; however, it is a performance
specification and is not intended to restrict design.
1.2 All testing and requirements of this specification shall be in accordance with Test Methods F1466F 1446, except where
noted herein.
1.3 Partial utilization of this standard is prohibited. Any statement of compliance with this specification must be a certification
that the product meets all of the requirements of this specification in its entirety. A product that fails to meet any one of the
requirements of this specification is considered to have failed this standard, and should not be sold with any indication that it meets
parts of this standard.
1.4 Headgear designed to comply with this and other standards may proclaim uses as certified by the manufacturer.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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.
2. Referenced Documents
2
2.1 ASTM Standards:
F 1446 TestMethodsforEquipmentandProceduresUsedinEvaluatingthePerformanceCharacteristicsofProtectiveHeadgear
2.2 Other Standards:
1995 Standard For Protective HeadgearFor Use with Motorcycles and Other Automotive Vehicles Section C4. Chin Bar Test
3. Labels and Warnings
3.1 Shall meet the requirements of Test Methods F 1446.
3.2 Shall have the words “For downhill mountain bicycle racing.”
4. Marking the Test Line
4.1 The test line is shown in Fig. 1 and shall be marked in accordance with Test Methods F 1446.
5. Conditioning and Number of Samples
5.1 Shall be in accordance with Test Methods F 1446.
6. Retention System Testing
6.1 Retention system tests shall be performed before impact testing.
6.2 The ambient helmet shall be subjected to the positional stability (roll-off) test in accordance withTest Methods F 1446using
a 4-kg drop mass from a height of 0.6 m.
6.3The retention system shall remain intact, and the helmet must remain on the headform.
1
This specification is under the jurisdiction of ASTM Committee F08 on Sports Equipment and Facilities and is the direct responsibility of Subcommittee F08.53 on
Headgear and Helmets.
Current edition approved June 10, 2000. Published August 2000. Originally issued as F1952–99. Last previous edition F1952–99.
Current edition approved Jan. 1, 2009. Published February 2009. Originally approved in 1999. Last previous edition approved in 2000 as F 1952 – 00.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F1952–09
HEADFORM DIMENSION
SIZE X L/2 Y R S T U
A 24.0 88.0 89.7 47.5 23.0 142.0 84.0
E 26.0 94.5 96.0 49.0 24.0 151.0 88.0
J 27.5 101.0 102.5 50.5 25.0 160.0 92.0
M 29.0 106.0 107.0 52.0 27.0 166.0 96.0
O 30.0 108.5 110.0 53.0 27.0 170.0 97.0
FIG. 1 Marking the Test Line
6.4The hot, cold, and wet helmets shall be subjected to the dynamic strength retention test in accordance with Test Methods
F1446
6.3 The hot, cold, and wet helmets shall be subjected to the dynamic strength retention test in accordan
...