Showing posts with label National Highway Traffic Safety Administration (NHTSA). Show all posts
Showing posts with label National Highway Traffic Safety Administration (NHTSA). Show all posts

January 24, 2014

Legal analysis: Confusion over electric bike regulations


Published July 29, 2013 in Bicycle Retailer and Industry News
Republished with permission

by Steven W Hansen

After reading two articles in BRAIN’s June 15, 2013 issue (“Speedy e-bikes trouble industry” and “NYC e-bike crackdown exposes legal morass”) as well as a follow up letter to the editor in the July 1, 2013 edition, I was compelled to respond to some apparent misunderstanding by some as to what the “laws and regulations” are with respect to electric bikes and how they do and don’t work together.

First of all there is quite a bit of confusion regarding terminology. I am going to use the phrase “electric bikes” to cover all “bicycles” (not stand on scooters without a seat) which have an “electric motor” to (help) propel them. The industry has evolved into “low speed” electric bikes and “high speed” electric bikes and various configurations which require no pedaling (or may not even have pedals) to the various “pedal assist” varieties, in which the motor wont help you unless you help it. But I digress.

Before 2003 there was really very little in the way of laws or regulations dealing with electric bikes. California passed a few laws in 1998 dealing with what at the time was a new phenomenon and those laws still exist today (more on that later). But the main event that started the ball rolling was when the bicycle industry was able to get Congress to pass a law amending the Consumer Product Safety Commission’s (CPSC) definition of a “bicycle” to include “low speed electric bicycles” which is defined as a “two- or three-wheeled vehicle with fully operable pedals and an electric motor of less than 750 watts (1 h.p.), whose maximum speed on a paved level surface, when powered solely by such a motor while ridden by an operator who weighs 170 pounds, is less than 20 mph.

This did help clarify the CPSC’s jurisdiction. Before 2003 there was a legitimate question if CPSC had “regulatory” authority over all electric bikes (as “consumer products”, its generally mandated scope of authority) or if it overlapped the Dept. of Transportation (DOT) and its sub agency the National Highway Transportation Safety Administration (NHTSA). NHTSA defined (and regulated) “motor vehicles” (and still does today) as a “vehicle driven or drawn by mechanical power and manufactured primarily for use on the public streets, roads, and highways…”

From the 2003 change in the regulations it was clear that the CPSC only wanted to carve out a small(er) part of the “electric bike” market to similarly regulate as “bicycles” (no new regulations were adopted to deal with the manufacture of electric bikes, just the definition).

Unfortunately this still left NHTSA holding the bag sort of speak on what to do with all the “other” electric “devices” not regulated under CPSC’s new 2003 “carve out”. Before 2005 NHTSA had taken a somewhat ad hoc approach to requests for clarifications from electric or “motorized” bicycle manufacturers (and others) as to whether specific devices were “motor vehicles” or not. But after the CPSC acted in 2003 NHTSA then began a “notice of draft interpretation and request for comments” (aka “rulemaking” without intervention by Congress) in 2005 to help clarify when certain two and three wheeled motorized devices would be deemed “vehicles” and regulated by NHTSA and when they would not be. The problem of course is that one agency can only determine the scope of its own regulatory authority, not that of another agency. NHTSA placed great emphasis on the 20 mph limit that CPSC focused on. They also differentiated a ‘‘Motor-driven cycle’’ previously defined as “motorcycle” “with a motor that produces 5-brake horsepower or less.’’ NHTSA adopted the 20 mph limit as a more decisive factor as opposed to previous rulings as it concluded “that the maximum speed of a vehicle with on-road capabilities is largely determinative of whether the vehicle was manufactured to operate on a public road, in normal moving traffic, and therefore a ‘‘motor vehicle.’’

Unfortunately the method to determine that speed was much more involved than the CPSC’s method and could yield slightly different results. Also the “draft interpretation” remained vague for two and three-wheeled vehicles with a speed capability of 20 mph or greater. Those vehicles would be excluded from the definition of ‘‘motor vehicle’’ if they were manufactured primarily for off-road use. To determine that question NHTSA would again revert to the case by case approach of looking at the physical features of the vehicle to see if was intended for on or off road use. Again NHTSA does not regulate any off road vehicles like off road motorcycles for instance. Those all fall under CPSC jurisdiction (by default, if it’s a “consumer product”), yet there are no CPSC regulations specifically for such electrically powered devices (if they don’t meet the CPSC definition of a “low speed electric bicycle”). Finally, the NHTSA 2005 “draft interpretation” is still in “draft” stage and is no more binding that any opinion letter from NHTSA. It is not a regulation like CPSC’s electric bike definition and from discussing the matter with the NHTSA legal department there is nothing indicating that will change any time soon.

The electric bike manufacturers and distributors are for the most part satisfied with the way the laws are currently written (or at least interpreted) at the federal level. However some would like to see better and more clear regulation of the over 20 mph category as they apparently are trying to do in the EU with “fast or speed pedelecs.”

The trickier issue of course was raised once again in the article “NYC e-bike crackdown exposes legal morass” which brings to light what many fail to realize about the federal regulations. First none of the electric bikes that fall within the regulations (under 20 mph) have any specific regulations directed at electric bikes other than simply defining what is and to some extent what is not an electric bike (neither NHTSA or CPSC have regulations covering the motors or throttle devices, for example).

Over the years states have basically borrowed NHTSA’s definition of a motor vehicle along with all the regulations governing their manufacture and have incorporated those into their state laws. States have similarly regulated bicycles utilizing the 1973 CPSC bicycle standard as a basis. But with electric bicycles the process seemed to happen in reverse. Electric bicycles popped up and states, caught by surprise, felt they needed to deal with them on their roads and sidewalks, as CPSC and NHTSA failed to timely regulate their manufacture. Some of these laws unfortunately also had to define what the state felt an electric bike was and was not and in some cases this can conflict with federal law.

The other problem is that these federal regulations only affect the manufacture and first sale of these devices, not where, when, how, who and under what other conditions (age limits, licenses, insurance, registration etc.) they can be operated. The federal law has no “preemptive effect” over such state laws. These issues have always traditionally been regulated by state laws and in some cases even county and city laws. This is also true for cars, trucks and traditional non-powered bikes. CPSC mandates how bicycles must be tested and sold and what standards bicycle helmets must meet in their testing and construction but it does not mandate that riders must use the helmets while riding bicycles. That is left up to states or cities to regulate. The same was true for bicycle headlights and tail lights. CPSC does not require them on bikes but most state laws do if riding on road at night. This issue was hotly contested in a serious injury case some years back.

I approached the electric bike industry in 1995-2000 with a two pronged approach; Try to develop some voluntary standards for electric bikes that could be adopted by NHTSA or CPSC (much like they adopted the ASTM bicycle helmet standard) and then try to use model “use” legislation at the state level incorporating the ASTM standards and classifications. The proposal drew interest but was not acted upon by enough influential companies at the time. This legislative approach was somewhat followed by Google with it driverless car legislation passed in California and Nevada recently. Segway also tried a similar approach to pave the way for sales of its totally new type of device.

But the electric bike industry is following the traditional, difficult and time consuming approach. Let consumers buy the products and once a critical mass of the devises is in use there will be legislative “fixes” to accommodate the safe use of mainstream devices. The problem of course is that this is a car centric country, where drivers don’t like bikes of any kind on “their” roads, and many state legislators don’t really like Washington DC’s approach to anything. This was clear in the comments from states to NHTSA’s proposed regulation in 2005. Hopefully this method will work as it may be too late for the “pave the way with legislation first” method. The EU also tried to get a regulatory framework in place before the market was flooded with various devices and in some respects it worked as the EU market is much larger than the US market right now for electric bikes. There are other reasons as well.

Another issue to keep in mind are what some refer to as “fast” electric bicycles, which can travel over 20 mph solely on motor power. The fact that these “fast” electric bikes can travel over 20 mph solely on motor power takes them outside the scope of the CPSC definition of a “low speed electric bicycle”. Some sellers of these “fast” electric bikes claim that these bikes are designed for “off road” use. However, this may be a way to get around the CPSC and NHTSA regulations (and possibly some state laws), since some of these bikes appear to be designed for road use, as opposed to “off road” use (using the NHTSA interpretations). These “fast” e-bikes are causing debates in some states, notably in New York as noted in the article “NYC e-bike crackdown exposes legal morass”.

As pointed out above, the CPSC’s definition of an electric bike centers around a 20 mph limit, with the caveat that this 20 mph must not be exceeded if the electric bike is solely powered by its motor. Accordingly, this definition permits an electric bike which is powered by its rider (with the possible assistance of a motor, making the electric bike what some call a “pedelec”) to travel faster than 20 mph. The distinction is key to a correct interpretation of the CPSC’s definition.

Lastly, on a related topic altogether, some people appear to be confused about where the regulations fit in to the overall scheme of things in terms of liability. If a rider is injured by or on an electric bike, compliance with a regulation or standard (mandatory or otherwise) is not going to be of much help other than possibly being persuasive. (read more on that here). However failure to comply with a regulation (that is applicable) really can create an uphill battle in court. But again the facts of each specific case will be vastly different and drawing conclusions from specific cases will be difficult.

In the meantime it will be interesting to see what develops out of New York and if there is a state or city wide solution. As most in the industry know trying to lobby government officials to your point of view is a tricky business and fraught with pitfalls.

Steven W. Hansen an attorney who defends product manufacturers, distributors and retailers in product liability lawsuits and provides consultation on all matters related to the manufacture and distribution of consumer products. For further questions visit www.swhlaw.com or send an e mail to: legal.inquiry@swhlaw.com

The information in this column is subject to change and may not be applicable in your state. It is intended as a thought provoking discussion of general legal principles and does not constitute legal advice. Any opinions expressed herein are solely those of the author.



Law Offices of Steven W. Hansen | www.swhlaw.com | 562 866 6228 © Copyright 1996-2013 Conditions of Use

June 19, 2012

Helmet Use Among U.S. Motorcyclists Who Died in Crashes 2008–2010



This is an interesting and quite detailed study regarding the use of motorcycle helmets. It would be interesting to see how much of this data is transmutable to bicycle helmet use or non use and related injuries. The CDC (Centers for Disease Control; cdc.gov) analysed fatal crash data from 2008 to 2010, where a total of 14,283 motorcyclists were killed in crashes, among whom 6,057 (42 percent) were not wearing a helmet. In the 20 states with a universal helmet law (like California), 739 (12 percent) fatally injured motorcyclists were not wearing a helmet, compared with 4,814 motorcyclists (64 percent) in the 27 states with partial helmet laws and 504 (79 percent) motorcyclists in the three states without a helmet law. As of April 2012, 19 states and the District of Columbia had universal helmet laws, 28 states had partial helmet laws, and three states had no helmet law. The full report is available here in pdf

Law Offices of Steven W. Hansen | www.swhlaw.com | 562 866 6228 © Copyright 1996-2008 Conditions of Use

December 23, 2008

Federal Motor Vehicle Safety Standard No. 218 (Motorcycle helmets)

[Code of Federal Regulations]
[Title 49, Volume 5, Parts 400 to 999]
[Revised as of October 1, 1997]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR571.218]
[Page 581-596]

TITLE 49--TRANSPORTATION

CHAPTER V--NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION

PART 571--FEDERAL MOTOR VEHICLE SAFETY STANDARDS6--Table of Contents

Subpart B--Federal Motor Vehicle Safety Standards

Sec. 571.218 Standard No. 218; Motorcycle helmets.

S1. Scope. This standard establishes minimum performance

requirements for helmets designed for use by motorcyclists and other

motor vehicle users.

S2. Purpose. The purpose of this standard is to reduce deaths and

injuries to motorcyclists and other motor vehicle users resulting from

head impacts.

S3. Application. This standard applies to all helmets designed for

use by motorcyclists and other motor vehicle users.

S4. Definitions.

Basic plane means a plane through the centers of the right and left

external ear openings and the lower edge of the eye sockets (Figure 1)

of a reference headform (Figure 2) or test headform.

Helmet positioning index means the distance in inches, as specified

by the manufacturer, from the lowest point of the brow opening at the

lateral midpoint of the helmet to the basic plane of a reference

headform, when the helmet is firmly and properly positioned on the

reference headform.

Midsagittal plane means a longitudinal plane through the apex of a

reference headform or test headform that is perpendicular to the basic

plane (Figure 3).

Reference headform means a measuring device contoured to the

dimensions of one of the three headforms described in Table 2 and

Figures 5 through 8 with surface markings indicating the locations of

the basic, mid-sagittal, and reference planes, and the centers of the

external ear openings.

Reference plane means a plane above and parallel to the basic plane

on a reference headform or test headform (Figure 2) at the distance

indicated in Table 2.

Retention system means the complete assembly by which the helmet is

retained in position on the head during use.

Test headform means a test device contoured to the dimensions of one

of the three headforms described in Table 2 and Figures 5 through 8 with

surface markings indicating the locations of the basic, mid-sagittal,

and reference planes.

S5. Requirements. Each helmet shall meet the requirements of S5.1,

S5.2, and S5.3 when subjected to any conditioning procedure specified in

S6.4, and tested in accordance with S7.1, S7.2, and S7.3.

S5.1 Impact attenuation. When an impact attenuation test is

conducted in accordance with S7.1, all of the following requirements

shall be met:

(a) Peak accelerations shall not exceed 400g;

(b) Accelerations in excess of 200g shall not exceed a cumulative

duration of 2.0 milliseconds; and

(c) Accelerations in excess of 150g shall not exceed a cumulative

duration of 4.0 milliseconds.

S5.2 Penetration. When a penetration test is conducted in

accordance with S7.2, the striker shall not contact the surface of the

test headform.

S5.3 Retention system.

S5.3.1 When tested in accordance with S7.3:

(a) The retention system or its components shall attain the loads

specified without separation; and

(b) The adjustable portion of the retention system test device shall

not move more than 1 inch (2.5 cm) measured between preliminary and test

load positions.

S5.3.2 Where the retention system consists of components which can

be independently fastened without securing the complete assembly, each

such component shall independently meet the requirements of S5.3.1.

S5.4 Configuration. Each helmet shall have a protective surface of

continuous contour at all points on or above the test line described in

S6.2.3. The helmet shall provide peripheral vision clearance of at least

105 deg. to each side of the mid-sagittal plane, when the helmet is

adjusted as specified in S6.3. The vertex of these angles, shown in

Figure 3, shall be at the point on the anterior surface of the reference

headform at the intersection of the mid-sagittal and basic planes. The

brow opening of the helmet shall be at least 1 inch (2.5 cm) above all

points in the basic plane that are within the angles of peripheral

vision (see Figure 3).

S5.5 Projections. A helmet shall not have any rigid projections

inside its shell. Rigid projections outside any

helmet's shell shall be limited to those required for operation of

essential accessories, and shall not protrude more than 0.20 inch (5mm).

S5.6 Labeling.

S5.6.1 Each helmet shall be labeled permanently and legibly, in a

manner such that the label(s) can be read easily without removing

padding or any other permanent part, with the following:

(a) Manufacturer's name or identification.

(b) Precise model designation.

(c) Size.

(d) Month and year of manufacture. This may be spelled out (for

example, June 1988), or expressed in numerals (for example, 6/88).

(e) The symbol DOT, constituting the manufacturer's certification

that the helmet conforms to the applicable Federal motor vehicle safety

standards. This symbol shall appear on the outer surface, in a color

that contrasts with the background, in letters at least \3/8\ inch (1

cm) high, centered laterally with the horizontal centerline of the

symbol located a minimum of 1\1/8\ inches (2.9 cm) and a maximum of 1\3/

8\ inches (3.5 cm) from the bottom edge of the posterior portion of the

helmet.

(f) Instructions to the purchaser as follows:

(1) ``Shell and liner constructed of (identify type(s) of

materials).

(2) ``Helmet can be seriously damaged by some common substances

without damage being visible to the user. Apply only the following:

(Recommended cleaning agents, paints, adhesives, etc., as appropriate).

(3) ``Make no modifications. Fasten helmet securely. If helmet

experiences a severe blow, return it to the manufacturer for inspection,

or destory it and replace it.''

(4) Any additional relevant safety information should be applied at

the time of purchase by means of an attached tag, brochure, or other

suitable means.

S5.7 Helmet positioning index. Each manufacturer of helmets shall

establish a positioning index for each helmet he manufactures. This

index shall be furnished immediately to any person who requests the

information, with respect to a helmet identified by manufacturer, model

designation, and size.

S6. Preliminary test procedures. Before subjecting a helmet to the

testing sequence specified in S7., prepare it according to the

procedures in S6.1, S6.2, and S6.3.

S6.1 Selection of appropriate headform.

S6.1.1 A helmet with a manufacturer's designated discrete size or

size range which does not exceed 6\3/4\ (European size: 54) is tested on

the small headform. A helmet with a manufacturer's designated discrete

size or size range which exceeds 6\3/4\, but does not exceed 7\1/2\

(European size: 60) is tested on the medium headform. A helmet with a

manufacturer's designated discrete size or size range which exceeds 7\1/

2\ is tested on the large headform.

S6.1.2 A helmet with a manufacturer's designated size range which

includes sizes falling into two or all three size ranges described in

S6.1.1 is tested on each headform specified for each size range.

S6.2 Reference marking.

S6.2.1 Use a reference headform that is firmly seated with the basic

and reference planes horizontal. Place the complete helmet to be tested

on the appropriate reference headform, as specified in S6.1.1 and

S6.1.2.

S6.2.2 Apply a 10-pound (4.5 kg) static verticle load through the

helmet's apex. Center the helmet laterally and seat it firmly on the

reference headform according to its helmet positioning index.

S6.2.3 Maintaining the load and position described in S6.2.2, draw a

line (hereinafter referred to as ``test line'') on the outer surface of

the helmet coinciding with portions of the intersection of that service

with the following planes, as shown in Figure 2:

(a) A plane 1 inch (2.5 cm) above and parallel to the reference

plane in the anterior portion of the reference headform;

(b) A vertical transverse plane 2.5 inches (6.4 cm) behind the point

on the anterior surface of the reference headform at the intersection of

the mid-sagittal and reference planes;

(c) The reference plane of the reference headform;

(d) A vertical transverse plane 2.5 inches (6.4. cm) behind the

center of the external ear opening in a side view; and

(e) A plane 1 inch (2.5 cm) below and parallel to the reference

plane in the posterior portion of the reference headform.

S6.3 Helmet positioning.

S6.3.1 Before each test, fix the helmet on a test headform in the

position that conforms to its helmet positioning index. Secure the

helmet so that it does not shift position before impact or before

application of force during testing.

S6.3.2 In testing as specified in S7.1 and S7.2, place the retention

system in a position such that it does not interfere with free fall,

impact or penetration.

S6.4 Conditioning.

S6.4.1 Immediately before conducting the testing sequence specified

in S7, condition each test helmet in accordance with any one of the

following procedures:

(a) Ambient conditions. Expose to a temperature of

70 deg.F(21 deg.C) and a relative humidity of 50 percent for 12 hours.

(b) Low temperature. Expose to a temperature of 14 deg.F(-10 deg.C)

for 12 hours.

(c) High temperature. Expose to a temperature of 122 deg.F(50 deg.C)

for 12 hours.

(d) Water immersion. Immerse in water at a temperature of

77 deg.F(25 deg.C) for 12 hours.

S6.4.2 If during testing, as specified in S7.1.3 and S7.2.3, a

helmet is returned to the conditioning environment before the time out

of that environment exceeds 4 minutes, the helmet is kept in the

environment for a minimum of 3 minutes before resumption of testing with

that helmet. If the time out of the environment exceeds 4 minutes, the

helmet is returned to the environment for a minimum of 3 minutes for

each minute or portion of a minute that the helmet remained out of the

environment in excess of 4 minutes or for a maximum of 12 hours,

whichever is less, before the resumption of testing with that helmet.

S7. Test conditions.

S7.1 Impact attenuation test.

S7.1.1 Impact attenuation is measured by determining acceleration

imparted to an instrumented test headform on which a complete helmet is

mounted as specified in S6.3, when it is dropped in guided free fall

upon a fixed hemispherical anvil and a fixed flat steel anvil.

S7.1.2 Each helmet is impacted at four sites with two successive

identical impacts at each site. Two of these sites are impacted upon a

flat steel anvil and two upon a hemispherical steel anvil as specified

in S7.1.10 and S7.1.11. The impact sites are at any point on the area

above the test line described in paragraph S6.2.3, and separated by a

distance not less than one-sixth of the maximum circumference of the

helmet in the test area.

S7.1.3 Impact testing at each of the four sites, as specified in

S7.1.2, shall start at two minutes, and be completed by four minutes,

after removal of the helmet from the conditioning environment.

S7.1.4 (a) The guided free fall drop height for the helmet and test

headform combination onto the hemispherical anvil shall be such that the

minimum impact speed is 17.1 feet/second (5.2 m/sec). The minimum drop

height is 54.5 inches (138.4 cm). The drop height is adjusted upward

from the minimum to the extent necessary to compensate for friction

losses.

(b) The guided free fall drop height for the helmet and test

headform combination onto the flat anvil shall be such that the minimum

impact speed is 19.7 ft./sec (6.0 m/sec). The minimum drop height is 72

inches (182.9 cm). The drop height is adjusted upward from the minimum

to the extent necessary to compensate for friction losses.

S7.1.5 Test headforms for impact attenuation testing are constructed

of magnesium alloy (K-1A), and exhibit no resonant frequencies below

2,000 Hz.

S7.1.6 The monorail drop test system is used for impact attenuation

testing.

S7.1.7 The weight of the drop assembly, as specified in Table 1, is

the combined weight of the test headform and the supporting assembly for

the drop test. The weight of the supporting assembly is not less than

2.0 lbs. and not more than 2.4 lbs. (0.9 to 1.1 kg). The supporting

assembly weight for the monorail system is the drop assembly weight

minus the combined weight of the test headform, the headform's

clamp down ring, and its tie down screws.

S7.1.8 The center of gravity of the test headform is located at the

center of the mounting ball on the supporting assembly and lies within a

cone with its axis vertical and forming a 10 deg. included angle with

the vertex at the point of impact. The center of gravity of the drop

assembly lies within the rectangular volume bounded by x = -0.25 inch

(-0.64 cm), x = 0.85 inch (2.16 cm), y = 0.25 inch (0.64 cm), and y =

-0.25 inch (-0.64 cm) with the origin located at the center of gravity

of the test headform. The rectangular volume has no boundary along the

z-axis. The x-y-z axes are mutually perpendicular and have positive or

negative designations in accordance with the right-hand rule (See Figure

5). The origin of the coordinate axes also is located at the center of

the mounting ball on the supporting assembly (See Figures 6, 7, and 8).

The x-y-z axes of the test headform assembly on a monorail drop test

equipment are oriented as follows: From the origin, the x-axis is

horizontal with its positive direction going toward and passing through

the vertical centerline of the monorail. The positive z-axis is

downward. The y-axis also is horizontal and its direction can be decided

by the z- and x-axes, using the right-hand rule.

S7.1.9 The acceleration transducer is mounted at the center of

gravity of the test headform with the sensitive axis aligned to within

5 deg. of vertical when the test headform assembly is in the impact

position. The acceleration data channel complies with SAE Recommended

Practice J211 JUN 80, Instrumentation for Impact Tests, requirements for

channel class 1,000.

S7.1.10 The flat anvil is constructed of steel with a 5-inch (12.7

cm) minimum diameter impact face, and the hemispherical anvil is

constructed of steel with a 1.9 inch (4.8 cm) radius impact face.

S7.1.11 The rigid mount for both of the anvils consists of a solid

mass of at least 300 pounds (136.1 kg), the outer surface of which

consists of a steel plate with minimum thickness of 1 inch (2.5 cm) and

minimum surface area of 1 ft \2\ (929 cm \2\ ).

S7.1.12 The drop system restricts side movement during the impact

attenuation test so that the sum of the areas bounded by the

acceleration-time response curves for both the x- and y-axes (horizontal

axes) is less than five percent of the area bounded by the acceleration-

time response curve for the vertical axis.

S7.2 Penetration test.

S7.2.1 The penetration test is conducted by dropping the penetration

test striker in guided free fall, with its axis aligned vertically, onto

the outer surface of the complete helmet, when mounted as specified in

S6.3, at any point above the test line, described in S6.2.3, except on a

fastener or other rigid projection.

S7.2.2 Two penetration blows are applied at least 3 inches (7.6 cm)

apart, and at least 3 inches (7.6 cm) from the centers of any impacts

applied during the impact attenuation test.

S7.2.3 The application of the two penetration blows, specified in

S7.2.2, starts at two minutes and is completed by four minutes, after

removal of the helmet from the conditioning environment.

S7.2.4 The height of the guided free fall is 118.1 inches (3 m), as

measured from the striker point to the impact point on the outer surface

of the test helmet.

S7.2.5 The contactable surface of the penetration test headform is

constructed of a metal or metallic alloy having a Brinell hardness

number no greater than 55, which will permit ready detection should

contact by the striker occur. The surface is refinished if necessary

before each penetration test blow to permit detection of contact by the

striker.

S7.2.6 The weight of the penetration striker is 6 pounds, 10 ounces

(3 kg).

S7.2.7 The point of the striker has an included angle of 60 deg., a

cone height of 1.5 inches (3.8 cm), a tip radius of 0.02 inch (standard

0.5 millimeter radius) and a minimum hardness of 60 Rockwell, C-scale.

S7.2.8 The rigid mount for the penetration test headform is as

described in S7.1.11.

S7.3 Retention system test.

S7.3.1 The retention system test is conducted by applying a static

tensile load to the retention assembly of a complete helmet, which is mounted,

as described in S6.3, on a stationary test headform as shown in Figure

4, and by measuring the movement of the adjustable portion of the

retention system test device under tension.

S7.3.2 The retention system test device consists of both an

adjustable loading mechanism by which a static tensile load is applied

to the helmet retention assembly and a means for holding the test

headform and helmet stationary. The retention assembly is fastened

around two freely moving rollers, both of which have a 0.5 inch (1.3 cm)

diameter and a 3-inch (7.6 cm) center-to-center separation, and which

are mounted on the adjustable portion of the tensile loading device

(Figure 4). The helmet is fixed on the test headform as necessary to

ensure that it does not move during the application of the test loads to

the retention assembly.

S7.3.3 A 50-pound (22.7 kg) preliminary test load is applied to the

retention assembly, normal to the basic plane of the test headform and

symmetrical with respect to the center of the retention assembly for 30

seconds, and the maximum distance from the extremity of the adjustable

portion of the retention system test device to the apex of the helmet is

measured.

S7.3.4 An additional 250-pound (113.4 kg) test load is applied to

the retention assembly, in the same manner and at the same location as

described in S7.3.3, for 120 seconds, and the maximum distance from the

extremity of the adjustable portion of the retention system test device

to the apex of the helmet is measured.

Appendix to Sec. 571.218

Table 1--Weights for Impact Attenuation Test Drop Assembly

------------------------------------------------------------------------

Test headform size Weight \1\--1b(kg)

------------------------------------------------------------------------

Small................................... 7.8 (3.5 kg).

Medium.................................. 11.0 (5.0 kg).

Large................................... 13.4 (6.1 kg).

------------------------------------------------------------------------

\1\ Combined weight of instrumented test headform and supporting

assembly for drop test.

[GRAPHIC OMITTED]

Law Offices of Steven W. Hansen | www.swhlaw.com | 562 866 6228
© Copyright 1996-2008 Conditions of Use