Add-on child restraint system means any portable child restraint system.
Backless child restraint system means a child restraint system, other than a belt-positioning seat, that consists of a seating platform that does not extend up to provide a cushion for the child's back or head and has a structural element designed to restrain forward motion of the child's torso in a forward impact.
Belt-positioning seat means a child restraint system that positions a child on a vehicle seat to improve the fit of a vehicle Type 2 belt system on the child and that lacks any component, such as a belt system or a structural element, designed to restrain forward movement of the child's torso in a forward impact.
Booster seat means either a backless child restraint system or a belt-positioning seat.
Built-in child restraint system means a child restraint system that is designed to be an integral part of and permanently installed in a motor vehicle.
Car bed means a child restraint system designed to restrain or position a child in the supine or prone position on a continuous flat surface.
Child restraint anchorage system is defined in S3 of FMVSS No. 225 (§ 571.225 ).
Child restraint system means any device, except Type 1 or Type 2 seat belts, designed for use in a motor vehicle or aircraft to restrain, seat, or position children who weigh 36 kilograms (kg) (80 lb) or less.
Contactable surface means any child restraint system surface (other than that of a belt, belt buckle, or belt adjustment hardware) that may contact any part of the head or torso of the appropriate test dummy, specified in S7, when a child restraint system is tested in accordance with S6.1.
Factory-installed built-in child restraint system means a built-in child restraint system that has been or will be permanently installed in a motor vehicle before that vehicle is certified as a completed or altered vehicle in accordance with part 567 of this chapter.
Harness means a combination pelvic and upper torso child restraint system that consists primarily of flexible material, such as straps, webbing or similar material, and that does not include a rigid seating structure for the child.
Rear-facing child restraint system means a child restraint system, except a car bed, that positions a child to face in the direction opposite to the normal direction of travel of the motor vehicle.
Representative aircraft passenger seat means either a Federal Aviation Administration approved production aircraft passenger seat or a simulated aircraft passenger seat conforming to Figure 6.
School bus child restraint system means an add-on child restraint system (including a harness) manufactured and sold only for use on school bus seats, that has a label conforming with S5.3.1(b).
Seat orientation reference line or SORL means the horizontal line through Point Z as illustrated in Figure 1A-1 and 1A-2.
Specific vehicle shell means the actual vehicle model part into which the built-in child restraint system is or is intended to be fabricated, including the complete surroundings of the built-in system. If the built-in child restraint system is or is intended to be fabricated as part of any seat other than a front seat, these surroundings include the back of the seat in front, the interior rear side door panels and trim, the floor pan, adjacent pillars (e.g., the B and C pillars), and the ceiling. If the built-in system is or is intended to be fabricated as part of the front seat, these surroundings include the dashboard, the steering mechanism and its associated trim hardware, any levers and knobs installed on the floor or on a console, the interior front side door panels and trim, the front seat, the floor pan, the A pillars and the ceiling.
Tether anchorage is defined in S3 of FMVSS No. 225 (§ 571.225 ).
Tether hook is defined in S3 of FMVSS No. 225 (§ 571.225 ).
Tether strap is defined in S3 of FMVSS No. 225 (§ 571.225 ).
Torso means the portion of the body of a seated anthropomorphic test dummy, excluding the thighs, that lies between the top of the child restraint system seating surface and the top of the shoulders of the test dummy.
Table 1 to S5(f)-Average Weight of Child Represented by Various Test Dummies
Test dummy (specified in S7 of this standard) | Average weight of child represented by test dummy (pounds) |
CRABI 12-month-old infant dummy ( 49 CFR Part 572, Subpart R) | 22 |
Hybrid III 3-year-old dummy ( 49 CFR Part 572, Subpart P) | 31 |
Hybrid III 6-year-old dummy (49 CFR Part 572, Subpart N) | 45 |
Hybrid III 6-year-old weighted dummy ( 49 CFR part 572 Subpart S) | 62 |
Hybrid II 6-year-old dummy ( 49, CFR Part 572, Subpart I) | 45 |
Table 2 to S5.1.3.1(a)-Add-On Child Restraints That Can Be Used Forward-Facing
When this type of child restraint system | Is tested in accordance with- | These excursion limits apply | Explanatory note: in the test specified in 2nd column, the excursion requirement must be met when the child restraint system is attached to the test seat assembly in the manner described below, subject to certain conditions |
Harnesses and restraints designed for use by children with physical disabilities | S6.1.2(a)(1)(i)(A) | Head 813 mm; Knee 915 mm | Attached with lap and shoulder belt; in addition, if a tether is provided, it is attached. |
School bus child restraint systems | S6.1.2(a)(1)(i)(A) | Head 813 mm; Knee 915 mm | Attached with seat back mount, or seat back and seat pan mounts. |
Booster seats | S6.1.2(a)(1)(ii) | Head 813 mm; Knee 915 mm | Attached with lap and shoulder belt; no tether is attached. |
Child restraint systems other than harnesses, restraints designed for use by children with physical disabilities, school bus child restraint systems, and booster seats | S6.1.2(a)(1)(i)(B) | Head 813 mm; Knee 915 mm | Attached with a lap belt; without a tether attached. Attached with a lap and shoulder belt; without a tether attached. Attached to lower anchorages of child restraint anchorage system; without a tether attached. |
Child restraint systems other than harnesses, restraints designed for use by children with physical disabilities, school bus child restraint systems | S6.1.2(a)(1)(i)(A), S6.1.2(a)(1)(i)(C) | Head 720 mm; Knee 915 mm | Attached with a lap belt, with a tether attached. Attached with a lap and shoulder belt, with a tether attached. Attached to lower anchorages of child restraint anchorage system, with a tether attached. |
Child restraint systems equipped with a fixed or movable surface described in S5.2.2.2 that has belts that are not an integral part of that fixed or movable surface | S6.1.2(a)(2) | Head 813 mm; Knee 915 mm | Attached with lap belt or lap and shoulder belt or lower anchorages of child restraint anchorage system; no tether is attached. |
Table 3 to S5.2.1.1(a)
Weight1 | Height2(mm) |
Not more than 18 kg | 500 |
More than 18 kg | 560 |
1 When a child restraint system is recommended under S5.5 for use by children of the above weights.
2 The height of the portion of the system seat back providing head restraint shall not be less than the above.
Table 4 for S5.3.2 Means of Installation for Child Restraint Systems
Type of add-on child restraint system | Type 1 seat belt assembly plus a tether anchorage, if needed | Type 1 seat belt assembly | Type 2 seat belt assembly plus a tether anchorage, if needed | Type 2 seat belt assembly | Lower anchorages of the child restraint anchorage system plus a tether, if needed | Lower anchorages of the child restraint anchorage system | Seat back mount, or, seat back mount, and, seat pan mount |
School bus child restraint systems | X | ||||||
Harnesses | X | ||||||
Car beds | X | X | |||||
Rear-facing restraints | X | X | X | ||||
Booster seats | X | ||||||
All other child restraint systems | X | X | X | X | X | X |
Table 5 to S5.5.2(l)(3)(i)(B)-Maximum Child Weight Limit for Lower Anchor Use for Forward-Facing Child Restraint System-Rounding
CW = 65 - child restraint system weight (pounds) | Child weight limit "*" (pounds) |
20 [LESS THAN] CW [LESS THAN EQUAL TO] 25 | 25 |
25 [LESS THAN] CW [LESS THAN EQUAL TO] 30 | 30 |
30 [LESS THAN] CW [LESS THAN EQUAL TO] 35 | 35 |
35 [LESS THAN] CW [LESS THAN EQUAL TO] 40 | 40 |
40 [LESS THAN] CW [LESS THAN EQUAL TO] 45 | 45 |
45 [LESS THAN] CW [LESS THAN EQUAL TO] 50 | 50 |
50 [LESS THAN] CW [LESS THAN EQUAL TO] 55 | 55 |
55 [LESS THAN] CW [LESS THAN EQUAL TO] 60 | 60 |
Table 6 to S5.5.2(l)(3)(i)(C)-Maximum Child Weight Limit for Lower Anchor Use for Rear-Facing Child Restraint System-Rounding
CW = 60 - child restraint system weight (pounds) | Child weight limit "*" (pounds) |
15 [LESS THAN] CW [LESS THAN EQUAL TO] 20 | 20 |
20 [LESS THAN] CW [LESS THAN EQUAL TO] 25 | 25 |
25 [LESS THAN] CW [LESS THAN EQUAL TO] 30 | 30 |
30 [LESS THAN] CW [LESS THAN EQUAL TO] 35 | 35 |
35 [LESS THAN] CW [LESS THAN EQUAL TO] 40 | 40 |
40 [LESS THAN] CW [LESS THAN EQUAL TO] 45 | 45 |
45 [LESS THAN] CW [LESS THAN EQUAL TO] 50 | 50 |
50 [LESS THAN] CW [LESS THAN EQUAL TO] 55 | 55 |
"WARNING! This restraint must only be used on school bus seats. Entire seat directly behind must be unoccupied or have restrained occupants." (The instruction's reference to a "restrained occupant" refers to an occupant restrained by any user-appropriate vehicle restraint or child restraint system (e.g., lap belt, lap and shoulder belt, booster seat or other child restraint system.)
The test conditions described in S6.1.1 apply to the dynamic systems test. The test procedure for the dynamic systems test is specified in S6.1.2. The test dummy specified in S7 is placed in the test specimen (child restraint system), clothed as described in S9 and positioned according to S10.
Figure 1A-1 to § 571.213b -Seat Orientation Reference Line and Seat Belt Anchorage Point Locations on the Standard Seat Assembly
Figure 1A-2 to § 571.213b -Seat Orientation Reference Line and Location of the Lower Anchorages of the Child Restraint Anchorate System on the Standard Seat Assembly
Figure 1B-1 to § 571.213b -Location of Shoulder Belt Upper and Lower Guide Loops and Forward Excursion Limits on the Standard Seat Assembly
Figure 1B-2 to § 571.213b -Location of the Child Restraint Anchorages and Forward Excursion Limits on the Standard Seat Assembly
Figure 1C to § 571.213b -Rear-Facing Child Restraint Forward and Upper Head Excursion Limits
Figure 2 to § 571.213b
Figure 3 to § 571.213b
Figure 4 to § 571.213b -Buckle Release Test
Figure 5 [Reserved]
Figure 6 to § 571.213b -Simulated Aircraft Passenger Seat
Figure 7 to § 571.213b -Pre-Impact Buckle Release Force Test Set-up
Figure 8 to § 571.213b -Release Force Application Device-Push Button Release Buckles
Figure 9a to § 571.213b -Registration Form for Child Restraint Systems-Product Identification Number and Purchaser Information Side
Figure 9b to § 571.213b -Registration Form for Child Restraint Systems-Address Side
Figure 10 to § 571.213b -Label on Child Seat Where Child's Head Rests
Figure 11 to § 571.213b -Interface Profile of Tether Hook
Figure 12 to § 571.213b -Label on Harness Component That Attaches to School Bus Seat Back
Figure 13 to § 571.213b -Lap Shield
Figure 14a to § 571.213b -HIII-10C Dummy Neck Angle Setting is SP-16 Degrees
Figure 14b to § 571.213b -HIII-10C Dummy Lumbar Angle Setting is SP-12 Degrees
49 C.F.R. §571.213b