[Code of Federal Regulations]
[Title 16, Volume 2]
[Revised as of January 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 16CFR1203.15]

[Page 220-221]
 
                     TITLE 16--COMMERCIAL PRACTICES
 
             CHAPTER II--CONSUMER PRODUCT SAFETY COMMISSION
 
PART 1203--SAFETY STANDARD FOR BICYCLE HELMETS--Table of Contents
 
                         Subpart A--The Standard
 
Sec.  1203.15  Positional stability test (roll-off resistance).

    (a) Test equipment.
    (1) Headforms. The test headforms shall comply with the dimensions 
of the full chin ISO reference headforms sizes A, E, J, M, and O.
    (2) Test fixture. The headform shall be secured in a test fixture 
with the headform's vertical axis pointing downward and 45 degrees to 
the direction of gravity (see Figure 7 of this part). The test fixture 
shall permit rotation of the headform about its vertical axis and 
include means to lock the headform in the face up and face down 
positions.
    (3) Dynamic impact apparatus. A dynamic impact apparatus shall be 
used to apply a shock load to a helmet secured to the test headform. The 
dynamic impact apparatus shall allow a 4-kg (8.8-lb) drop weight to 
slide in a guided free fall to impact a rigid stop anvil (see Figure 7 
of this part). The entire mass of the dynamic impact assembly, including 
the drop weight, shall be no more than 5 kg (11 lb).
    (4) Strap or cable. A hook and flexible strap or cable shall be used 
to connect the dynamic impact apparatus to the helmet. The strap or 
cable shall be of a material having an elongation of no more than 5 mm 
(0.20 in.) per 300 mm (11.8 in.) when loaded with a 22-kg (48.5 lb) 
weight in a free hanging position.
    (b) Test procedure.

[[Page 221]]

    (1) Orient the headform so that its face is down, and lock it in 
that orientation.
    (2) Place the helmet on the appropriate size full chin headform in 
accordance with the HPI and fasten the retention system in accordance 
with the manufacturer's instructions. Adjust the straps to remove any 
slack.
    (3) Suspend the dynamic impact system from the helmet by positioning 
the flexible strap over the helmet along the midsagittal plane and 
attaching the hook over the edge of the helmet as shown in Figure 7 of 
this part.
    (4) Raise the drop weight to a height of 0.6 m (2 ft) from the stop 
anvil and release it, so that it impacts the stop anvil.
    (5) The test shall be repeated with the headform's face pointing 
upwards, so that the helmet is pulled from front to rear.