nht74-2.34 | NHTSA

DATE: 02/15/74

FROM: AUTHOR UNAVAILABLE; Richard B. Dyson; NHTSA

TO: Busby Rivkin Sherman Levy and Rehm

TITLE: FMVSS INTERPRETATION

TEXT: This is in reply to your letter of December 13, 1973, asking whether glazing in the rear quarter windows of the Datsun model HLB-210 may, consistently with Motor Vehicle Safety Standard No. 205, be manufactured of AS 3 glazing material. This depends, as you point out, on whether this glazing is used "at levels requisite for driving visibility" under American National Standards Institute Standard ANS Z26.1-1966, incorporated into Standard No. 205. You refer in your letter to section 1017(a) of the California Vehicle Code which states:

Side windows to the rear of the driver and the rear windows not used for vision directly to the rear are not considered areas requisite for driving visibility.

The locations where the use of AS 3 glazing is permitted are set forth on page 12 of ANS Z26. AS 3 glazing may be used, "anywhere in a motor vehicle except in passenger car windshields and in the following locations at levels requisite for driving visibility . . . . (2) Passenger automobiles and taxicabs. Glazing of all windows including rear window, all interior partitions, and all apertures created for window purpose. (emphasis added)

The only exclusion from the broad prohibition against the use of AS3 glazing in passenger cars is "at levels not requisite for driving visibility." We do not agree with the California Code provision. We consider the word "levels" in Standard 205 to mean vertical heights in relation to the driver's eyes. We, therefore, cannot concur in the application of the "levels requisite for driving visibility" concept as it appears in Standard No. 205 to complete windows or other glazing areas of passenger cars.

With respect to the Datsun model in question, there is no evidence in your letter that the windows in question are not at a level requisite for driving visibility. In fact, they appear to include levels of a driver's normal eye point.

The NHTSA presently hopes to publish a revised notice of proposed rulemaking regarding direct fields of view in the fall of 1974. Previous proposals regarding this subject were withdrawn by notice published March 7, 1973 (38 FR 6194).

Yours truly,

ATTACH.

December 13, 1973

Guy Hunter -- Motor Vehicle Programs, National Highway Traffic Safety Administration Dear Mr. Hunter:

This will confirm our conversation of December 7, 1973 relative to the specification of "levels requisite for driver vision" in the ANSI Standard referenced in Federal Motor Vehicle Safety Standard No. 205.

Specifically, we would like your assurance that the guidance provided in the enclosed California Highway Patrol Regulations is in agreement with your interpretation of the Federal Motor Vehicle Safety Standard requirements. As marked, the California regulations permit the use of AS-3 glass in side windows to the rear of the driver (rear quarter windows).

Further, we would appreciate any indication from you regarding the timing of the proposed rule making on "direct fields of view", which we presume would establish precise future requirements for the location and light transmittance of motor vehicle glazing.

Our interest in this matter arises from the newly introduced model Datsun HLB-210 of our client, Nissan Motor Company. This vehicle has a small fixed pane of AS-3 glazing in what would otherwise be a solid rear quarter panel. I am enclosing a picture of this vehicle.

Respectfully submitted,

BUSBY RIVKIN SHERMAN LEVY and REHM;

George C. Nield -- Engineering Advisor

Enclosures

STATE OF CALIFORNIA

DEPARTMENT OF CALIFORNIA HIGHWAY PATROL P. O. Box 898 Sacramento 95804

ORDER ADOPTING, AMENDING, OR REPEALING REGULATIONS OF THE DEPARTMENT OF THE CALIFORNIA HIGHWAY PATROL

After proceedings had in accordance with the provisions of the Administrative Procedure Act (Gov. Code, Title 2, Div. 3, Part 1, Chapter 4.5) and pursuant to the authority vested by Section 2402 of the Vehicle Code, and to implement, interpret or make specific Sections 2402.5, 26106 and 26704 of the Vehicle Code, the Department of the California Highway Patrol hereby adopts, amends, or repeals regulations in Chapter 2, Title 13, California Administrative Code as follows:

(1) Repeals Article 7 of Subchapter 4

(2) Adopts Article 7 of Subchapter 4 to read:

Article 7. Safety Glazing Material

1010. Scope of Regulations. This article shall apply to safety glazing material governed by Sections 535, 26701, 26703, 26704, and 26705 of the Vehicle Code and required to be approved before sale or use.

1011. Definitions. The following definitions shall apply wherever the terms are used in this article:

(a) Safety Glazing Material. Safety glazing material is any glazing material so constructed, treated, or combined with other materials as to reduce, in comparison with ordinary sheet, plate, or float glass, the likelihood of injury to persons by glazing material whether it may be broken or unbroken.

(b) Areas Requisite for Driving Visibility. "Areas requisite for driving visibility" are glazed areas at levels established in Section 1017 of this code for the windshield, the windows and in Section 1017 of this code for the windshield, the windows and wind deflectors to the right and left of the driver, and the rear window, except for rear windows on vehicles equipped with left- and right-hand mirrors.

(d) Camper. A camper is a structure designed to be mounted upon a motor vehicle and to provide facilities for human habitation or camping purposes.

(e) ANSI Standard. An ANSI Standard is a standard issued by the American National Standards Institute, formerly referred to as ASA, American Standards Association, and USASI, United States of America Standards Institute.

(f) Approved Laboratory. An approved laboratory is a laboratory which has facilities and equipment for testing glazing material to ANSI Standards and has been approved by the department in accordance with the provisions of Sections 850 through 859 of this code.

1012. Application for Approval. Requests for approval or reapproval of safety glazing material shall be submitted on forms provided by the department, shall be accompanied by the items specified in following subsections (a) or (b), and (c) and (d), and shall be sent to the following address:

California Highway Patrol Engineering Section P. O. Box 898 Sacramento, California 95804

(a) Test Reports. Test reports shall be those issued by a laboratory approved by the department in accordance with Sections 350 through 859 of the code. Reports shall show compliance with Section 1015 of the code and shall contain at least the following information:

(1) Thickness of samples tested

(2) Color, shade, or tint of samples tested

(3) Size and spacing of conductor, size of bus bar, and spacing from periphery of glass, when electrical conductors are used

(4) A reproduction of the identification markings used on the material required by Section 1014 of this code

(5) Detailed results of each test required by ANSI Standard Z26.1-1966 (6) Date of test completion.

(b) Comparison Reports. Comparison reports shall include the following items:

(1) Copy of original test report for previously approved glazing material

(2) Written statement from the original manufacturer of the material authorizing its use by the applicant under a new identification marking

(3) Addendum to the original test report stating that "The new material is identical in every respect to the original material tested with the exception of the marks of identification. The old marks of identification are and the new marks of identification are ." This statement shall be signed by a representative of the approved laboratory.

(c) Identification Markings. One actual size reproduction of the identification markings used on the glazing material shall be reproduced in black on white paper and submitted with the application.

(d) Samples of Material. Samples of material shall be furnished as follows:

(1) One 2-inch or larger square sample of each color, tint, or shade of plastic glazing material bearing the required identification markings

(2) One 4-inch square sample of any glass containing an electrical conductor and bearing the required identification markings.

1013. Approval of Safety Glazing Material. Safety glazing material shall be approved as follows:

(a) Certificates of Approval. Certificates of approval for glazing material issued between January 1 and June 30, inclusive, shall expire on July 1, five years after the date of the test report. Certificates issued between July 1 and December 31, inclusive, shall expire on January 1, five years after the date of the test report. Certificates issued for a limited term of less than five years shall expire on the date shown on the certificate.

(b) Approval by Comparison. Certificates of approval for glazing material approved on the basis of a comparison report shall have the same expiration date as the certificate for (Illegible Words) glazing material.

(d) Noncurrent Safety Glazing Material. Noncurrent glazing material for which the certificate has expired may continue to be used on the motor vehicle or camper on which it was installed at the time of expiration and may be transferred between vehicles or campers. Stock on hand in California may continue to be sold for two years after the expiration date of the certificate. Replonishment of stock with material for which the certificate has expired is prohibited.

1014. Identification Markings. Each piece of safety glazing material shall be permanently marked so as to be visible and legible when installed on a vehicle or camper.

(a) Name and Model Designation. Markings shall include the following information:

(1) The manufacturer's name, initials, lettered trademark, or United States Department of Transportation (DOT) assigned code number, which shall be clearly different from those of other manufacturers

(2) The letter "M" followed by the manufacturer's model number for each different type, thickness, color tint, shade, or construction of the material

(3) The letters "AS" followed by the item number in the ANSI Standard with which the material complies, such as ASI or AS2.

(b) Recommended Format. Glazing material submitted for approval on or after September 1, 1970, should have the markings required by subsection (a) arranged so that the manufacturer's name, initials, lettered trademark, or DOT code number and the model number appear in succession on a single line below the trade symbol with no other markings except the "AS" designation on the same line. The following examples illustrate acceptable format:

(Graphics omitted)

(c) Shaded Areas. Shaded areas of less than 70 percent light transmittance which adjoin areas of 70 percent or more light transmittance shall be marked "AVS1" or "AIllegibleS2" at the dividing line. The arrow shall indicate which portion of the material complies with the item number shown.

(d) Size of Markings. The markings required in subsections (a) and (c) shall be in letters and numbers at least 0.070 inch in height. Additional markings may be of any height, shall be immediately above the required markings, and may be changed without notification to the department provided no change is made in the glazing material.

1015. Applicable Safety Glazing Material Standards. Safety glazing material shall meet Federal Motor Vehicle Safety Standard No. 205 and requirements of ANSI Standard Z26.1-1966.

1016. Electrical Conductors. Heating elements used for doing fogging and deicing, and wire and printed conductors used for other purposes manufactured in safety glazing material are acceptable for use in areas requisite for driving visibility in accordance with the following guidelines:

(a) Wire and Printed Conductors in Material Marked AS1. Heated wire conductors in material marked AS1 should not exceed 0.001 inch in diameter, should not be spaced closer than 0.040 inch or further apart than 0.150 inch, and the bus bar which connects the ends should be within 0.5 inch of the periphery of the daylight opening. The diameter of conductors used for other purposes should not exceed 0.010 inch for wire or 0.020 inch in width for printed types. Only one such conductor should be placed within 2 inches of and generally parallel to the periphery of the daylight opening; and not more than two should be centered vertically in the glazing material and spaced not more than 2 inches apart.

(b) Wire Conductors in Material Marked AS2. Wire conductors in material marked ASE should either meet A31 requirements in preceding subsection (a), or they should not exceed 0.0015 inch in diameter nor be spaced closer than 0.080 inch. The bus bar connecting the ends of the conductors should be within 0.5 inch of the periphery of the daylight opening.

(c) Printed Conductors on Material Marked AS2. Printed conductors on glazing material marked AS2 should not be more than 0.040 inch in width nor spaced closer than 0.900 inch. The bus bar connecting the ends of the conductors should be within 0.5 inch of the periphery of the daylight opening.

1017 Determination of Areas Regisite for Driving Visibility. The following methods for determining the levels of glazed areas requisite for driving visibility are recommended and considered acceptable until such time as a Federal Motor Vehicle Safety Standard defining the levels becomes effective:

(a) Levels. The established levels requisite for driving visibility include all levels below a horizontal plane 28 inches above the undepressed driver's seat for passenger cars, and 30 1/2 inches for other motor vehicles, except as specified in following subsections (b), (c), and (d). Measurements are made from a point 5.0 inches ahead of the bottom of the backrest and directly behind the center of the steering wheel, with the driver's seat in the rearmost and lowest position and the vehicle on a level surface. Areas requisite for driving visibility include all glazed areas below this plane and all of the glazed area of windows capable of being lowered. Side windows to the rear of the driver and the rear windows not used for vision directly to the rear are not considered areas requisite for driving visibility.

(b) Special Vehicles. Corresponding eye heights, based upon an average seat depression of 3.3 inches for passenger cars and 2.0 inches for other vehicles, apply to specially designed vehicles or vehicles designed for a standing driver.

(c) Curved Windshields. In order to accommodate manufacturing procedures for curved windshields, it is permissible for shaded windshield glazing material to have less than 70 percent luminous transmittance over areas extending inward from each corner post for a distance not exceeding 10 percent of the windshield width. These areas of reduced luminous transmittance should not extend more than 1.5 inches below the level requisite for driving visibility. The curved windshield exceptions should not apply to motor vehicles manufactured after September 1, 1972.

(d) Motorcycles. The established levels requisite for driving visibility for motorcycles include all planes between a horizontal plane 15 inches above the lowest portion of the seat when the seat is depressed by the operator and a horizontal plane 31 inches above the undepressed seat.

1018. Locations of Safety Glazing Material. Safety glazing material shall be used in accordance with the "AS" number marked on the material as follows:

(a) AS1. Laminated safety glass marked AS1 is required to be used in the windshield of every motor vehicle except a motorcycle and is acceptable for use anywhere in motor vehicles and campers.

(b) AS2 and AS3. Laminated or tempered safety glass marked AS2 is acceptable for use anywhere in a motor vehicle except in the windshield, and anywhere in a camper. Material marked AS3 has less than 70 percent light transmittance and is acceptable only in areas not requisite for driving visibility.

(c) AS2-26 and AS3-26. Laminated safety glass marked AS2-26 is acceptable for use anywhere in a motor vehicle except the windshield, and anywhere in a camper. Material marked AS3-26 has less than 70 percent light transmittance and is acceptable only in areas not requisite for driving visibility.

(d) AS4 and AS5. Rigid plastic safety glazing material marked AS4 is acceptable for use in interior partitions, auxiliary wind deflectors, folding doors, standee windows in buses, flexible curtains, readily removable windows, openings in roofs, rear windows of soft tops, rear doors of taxicabs, and windows of campers. Material marked AS5 has less than 70 percent light transmittance and is acceptable only in areas not requisite for driving visibility.

(e) AS6 and AS7. Flexible plastic safety glazing material marked AS6 is acceptable for use in the rear windows of soft tops, windshields for motorcycles, flexible curtains, and readily removable windows. Material marked AS7 has less than 70 percent light transmittance and is acceptable only in areas not requisite for driving visibility.

(f) AS8 and AS9. Wire glass marked AS8 is acceptable for use in folding doors, standee and rearmost windows in buses, and windows to the rear of the driver in trucks and truck tractors. Material marked AS9 has less than 70 percent light transmittance and is acceptable only in areas not requisite for driving visibility.

(g) AS10 and AS11. Laminated safety glazing material marked AS10 or AS11 is for use only in armored cars for which permits have been issued under Section 21713 of the Vehicle Code. Bullet-resistant glass marked AS10 is required in the windshields and is acceptable for use anywhere in the vehicle. Bullet-resistant glass marked AS11 is acceptable for use anywhere in the vehicle except the windshield.

(h) Shaded Material. The dividing line in the "AVS1" or "AVS2" markings on shaded glazing material shall be located so that the darker side of the dividing line is outside the areas requisite for driving visibility.

This order shall take effect on September 1, 1970, as provided in Section 11422(d) of the Government Code.

Dated: July 22, 1970

DEPARTMENT OF THE CALIFORNIA HIGHWAY PATROL; A. E. SHAFFER, Captain -- Acting Commander Safety Services Division

Interpretation ID: nht74-2.34