11.14.04.12

.12 Lighting.

A. General Lamp and Reflector Inspection. This includes all original equipment, exterior lighting plus whatever lights are authorized. School vehicles have special marking and lighting to assure their identity. Refer to diagrams of front and rear views (Figures 27 and 29).

Procedures: Reject Vehicle If:
(1) Visual Check of Lamp Function: Turn on the night driving lights and visually check the following: (Check (a) and (b) with ignition switch on, engine should not be running.)  (a) A bulb or sealed beam unit fails to light.
 (b) Turn signals do not properly indicate right or left when so switched.
 (a) Actuate turn signal lever to right and left, and observe function of turn signal lights (1962 or newer motor vehicles shall be so equipped. Turn signals shall emit white or amber light to the front and red or amber to the rear).  (c) Turn signals do not self-cancel if so equipped (if, because of age of the vehicle, parts are not available, this defect may be certified.)
 (b) Place vehicle in all forward gears and check back-up lamps (if vehicle is so equipped).  (d) Back-up lamp system functions when the vehicle is in any forward gear, or back-up lamp system fails to function when vehicle is in reverse.
 (c) If vehicle is so equipped, actuate the following and observe lamps:
   (i) Hazard warning lamps (1968 or newer motor vehicles shall be so equipped);
   (ii) Brake system warning lamps (if equipped);
   (iii) Indicator lamps for: hazard warning lamps, turn signals, high beam headlamps and school vehicle flashing warning lamps;
   (iv) Stop lamps (1968 or newer motor vehicles shall have two red or amber stop lamps; all others one);
   (v) Headlamps—upper and lower beam: Headlamps shall emit white light.
 (e) A lamp shows color contrary to law (red or blue light to the front; white light to the rear, except license plate lamps and back-up lamps when vehicle is in reverse.
 (f) A lamp fails to light proper filament when switched.
 (g) A required or authorized lamp, lens, or reflector is obscured by any object or shielded by a nontransparent material.
 (h) A lamp or reflector is not mounted to properly direct or reflect light.
 (i) A lamp assembly or reflector is loose or improperly mounted.
 (j) A tail lamp has a cracked or broken lens which emits a white light to the rear.
(2) Observe function of:
 (a) Tail lamps (red, two on 1972 or newer models; all others one).
 (b) Parking lamps (white or amber to the front; red to the rear). In addition, every bus, truck, or truck tractor 80 inches or more in overall width shall be equipped as required in A(2)(c), (d), (e), and (f).
 (c) Side marker lamps, one amber front and one red rear on each side. Vehicles over 30 feet in overall length one amber centrally located with respect to length of the vehicle.
 (k) A lamp, lens, or reflector is not an approved type.
 (l) Equipped with any unauthorized emergency or warning lamps.
 (m) A school vehicle manufactured after December 31, 1972, and the alternating flashing warning lamps are not equipped with shields or hoods.
 (n) Headlamp output is less than 5,000 candlepower on high beam or less than 3,500 candlepower on low beam.
 (o) Indicator lamps (if equipped) fail to function.
 (d) Reflectors: one amber front and one red rear on each side. Vehicles over 30 feet in overall length, one amber centrally located with respect to length of the vehicle. 1972 or newer models shall be equipped with at least two red reflectors on the rear. All other models shall have one. Reflectors may be combined with other lamps.  (p) Dash lamps do not illuminate fuel gauge, oil pressure gauge, alternator gauge, temperature gauge, speedometer, odometer, air pressure, or vacuum gauge.
 (q) Any required lamp is missing.
 (e) Clearance lamps: two amber front and two red rear to indicate overall width of the vehicle. One on each side of the vertical centerline of the vehicle at the same height and as near the top of the vehicle as possible. If the vehicle is equipped with three red identification lamps on the top rear, the rear clearance lamps may be mounted at the top or bottom of the vehicle.
 (f) Identification lamps: three amber front and three red rear grouped in a horizontal row with lamp centers spaced not less than 6 inches or more than 12 inches apart and mounted on a permanent structure of the vehicle as close as possible to vertical centerline of the vehicle. Required on front of all 1972 or newer trucks and buses and all truck tractors. Rear of all trucks and buses. If the cab of the vehicle is not more than 42 inches at the front roof line, a single identification lamp mounted at the center of the cab is acceptable.
 (g) License plate lamp or lamps—White.
 (h) Emergency/Warning Lamp when permitted or required. School vehicles manufactured before January 1985 shall be equipped with two front and two rear alternately flashing red warning lamps unless approved otherwise. School vehicles manufactured after December 1984 shall be equipped with two front and two rear alternately flashing amber warning lamps in addition to the two front and two rear alternately flashing red warning lamps. After January 1, 1994, all school vehicles shall be equipped with two front and two rear alternately flashing red and amber warning lamps. On school vehicles manufactured after December 31, 1972, the warning lamps shall be equipped with shields or hoods.
 (i) Red and Blue: Law enforcement vehicles; Red and/or White: Fire department, rescue vehicles, ambulances, State vehicles used for hazardous material spills; Amber: Service, maintenance, tow-trucks, escort, and slow moving farm vehicles.
 (j) Dash Lamps.
 (k) All interior lamps (school vehicle only):
   (i) Interior lamps to illuminate aisle;
   (ii) Stepwell lamp;
   (iii) Red identification lamp for emergency door (if equipped);
   (iv) Indicator lamp or signal for operation of flashing warning lamps;
  (v) Indicator lamps to monitor warning, turn signal, and hazard lamps.

Figure 24—TRUCK TRACTOR LIGHTING REQUIREMENTS.

Figure 25—SINGLE UNIT TRUCK LIGHTING REQUIREMENTS.

Figure 26—COMMERCIAL BUS LIGHTING REQUIREMENTS.

Figure 27—TYPE I SCHOOL VEHICLE LIGHTING REQUIREMENTS.

(3) Preparation for Headlamp Aim Inspection. Preparation for headlamp and aim inspection is to be done by owner of vehicle before inspection. Frame leveling and wheel alignment inspection is done before inspection. Frame leveling and wheel alignment inspection is done at the station. Any one of the items listed below can affect the inspection results and may cause rejection of the vehicle. To prevent this and reduce inspection time, the owner should have the first three items completed before inspection.

Procedures: Reject Vehicle If:
(a) Remove excessive ice and mud from under fenders.
(b) Inflate tires to recommended pressures.
(c) Be sure that lenses are clean; check for burned out bulbs and proper beam switching.
(d) Check for faulty wheel alignment or improper tracking of the rear axle.

B. Headlamp.

(1) High Beam. Vehicle shall be equipped with either the dual headlighting system consisting of four 5 1/4-inch diameter units, two of which shall be No. 1 and two of which shall be No. 2; or four 6 1/2 x 4 1/2 inch rectangular units, two of which shall be No. 1A and two of which shall be No. 2A; four 5.93 x 3.64-inch rectangular-type F units, two of which shall be LF units and two of which shall be UF units; or a single headlighting system consisting of two 7-inch units; or two 8 x 5 inch rectangular units; or an approved bulb and reflector-type system. All units bearing the marking No. 2 shall be inspected and aimed on low beam. All units bearing the marking No. 1 or no number shall be inspected and aimed on high beam. Headlamp inspection and aiming by the photoelectric-optical method, not applicable to school vehicles, requires a level area sufficient for the vehicle and test equipment. The test equipment shall be accurately calibrated to the floor and accurately aligned to the vehicle. Additional lighting information is contained in E, F, and G (limits are in inches at 25 feet). Labeling requirements for sealed beam headlamps manufactured on or after July 1, 1979: 5 3/4 inch type 1-1C1, type 2-2C1; 6 1/2 inch by 4 1/2 inch type 1A-1A1, type 2A-2A1; 7 inch type 2-2D1; 8 inch by 5 inch type 2B-2B1; type F 5.93 inch by 3.64 inch—low beam—LF, high beam—UF. Type F units require a special aimer adapter and must be aimed in accordance with the manufacturers' recommended procedures. Bulb and reflector-type headlamps currently approved contain a 9004 Sylvania bulb in a normal reflector unit or an H-4 bulb in a sealed reflector unit. Sealed reflector units contain a glass bubble which encases the bulb when in place which can be detected by removing the bulb and determining if the bubble exists.

Agency Note: Labeling requirements for sealed beam headlamps manufactured on or after July 1, 1979: 5 3/4 inches Type 1—1C1, Type 2—2C1; 6 1/2 inches by 4 1/4 inches Type 1A—1A1, Type 2A—2A1; 7 inches Type 2—2D1; 8 inches by 5 inches Type 2B—2B1

Figure 28.

Figure 29—TYPE 1-SCHOOL VEHICLE HEADLAMP CONFIGURATIONS.

Procedures: Reject Vehicle If:
 (a) High Beam (Type 1):
   (i) With the vehicle in the inspection area and test equipment properly calibrated and aligned to the vehicle, switch headlamps to high beam and observe hot spot.
Center is:
 (a) Horizontally:
   (i) More than 4 inches right, or
   (ii) More than 4 inches left of the vertical centerline;
   (ii) When properly aimed, the center (hot spot) of the high intensity zone is set on the vertical and horizontal centerlines of the lamp.  (b) Vertically:
   (i) More than 4 inches above, or
   (ii) More than 4 inches below the horizontal centerline.

(2) Low Beam. Inspect the low beam headlamp in the same method as indicated for high beam. Always inspect the following sealed beam units on low beam only: 5 3/4 inch diameter or 6 1/2 x 4 1/4 inch rectangular marked type 2 or 2A and 7 inch diameter or 8 x 5 inch rectangular marked type 2 or 2B.

Procedures: Reject Vehicle If:
(a) Low Beam (Type 2):
 (i) Under same procedure as high beam aim inspection, switch headlamps on low beam and observe either the center of the high intensity zone or the left and top edges of the zone.
 (ii) When properly aimed: Edges of high intensity zone—Top edge centered on horizontal centerline, left centered on vertical centerline.
 (iii) Center of high intensity zone. Adjust hot spot to 15 inches horizontally and 11 inches vertically.
(a) Beam pattern:
 (i) Left edge is horizontally more than 4 inches right or left of the vertical centerline; or
 (ii) Top edge is vertically more than 4 inches above or below the horizontal centerline;
(b) Hot spot is:
 (i) Horizontally less than 11 inches or more than 19 inches; or
 (ii) Vertically less than 7 inches or more than 15 inches.

C. Headlamp—Applicable School Vehicles Only.

(1) To compensate for the various conditions of loading encountered during inspection, the frame or body floor shall be made level before checking. This will provide a standard condition for inspecting all vehicles and may be accomplished by using a combination of blocks under the rear wheels or a lifting device (jack) or both for the front end. A spirit level may be laid along the frame side member.

Procedures: Reject Vehicle If:
(a) Headlamp Aim:
(b) High Beam: Attach mechanical aimer to headlamp unit according to instructions. Take readings.
High Beam:
 (a) Horizontal aim is more than:
   (i) 4 inches to the left; or
   (ii) 4 inches to the right.
 (b) Vertical Aim is:
   (i) more than 4 inches up; or
   (ii) more than 4 inches down.
(c) Low Beam: Attach mechanical aimer to headlamp unit according to instructions. Take readings. Low Beam:
 (a) Horizontal aim is more than:
   (i) 4 inches to the left; or
   (ii) 4 inches to the right.
 (b) Vertical aim is:
   (i) more than 4 inches up; or
   (ii) more than 4 inches down.

(2) Place vehicle in a darkened location of sufficient size for the vehicle and an additional 25 feet from lamps to screen. Level the vehicle frame as described in §C(1). The vehicle shall be located accurately in front of the screen. An approved marked screen and adequate test area are required.

Procedures: Reject Vehicle If:
High Beam: With vehicle properly located, switch headlamps to high beam and observe center of high intensity zone on the screen. Center is:
 (a) Horizontally:
   (i) More than 4 inches right; or
   (ii) More than 4 inches left of vertical centerline.
 (b) Vertically:
   (i) More than 4 inches above; or
   (ii) More than 4 inches below the horizontal centerline.

Figure 30—AIMING SCREEN BEAM PATTERN-HIGH BEAM.

(3) Inspect the low beam headlamp in the same method indicated as for high beam. Always inspect the following sealed beam units on low beam only: 5 3/4 inch diameter or 6 1/2 x 4 1/4 inch rectangular units marked type 2 or 2A and 7 inch diameter or 8 x 5 inch rectangular units marked type 2 or 2B.

Procedures: Reject Vehicle If:
Low Beam: With vehicle properly located, switch headlamps to low beam and observe left and top edges of high intensity zone on the screen.  (a) Left edge is horizontally:
   (i) More than 4 inches left; or
   (ii) More than 4 inches right of vertical centerline.
 (b) Top edge is vertically:
   (i) More than 4 inches above; or
   (ii) More than 4 inches below the horizontal centerline.

Figure 31— AIMING SCREEN BEAM PATTERN-LOW BEAM.

D. Fog Lamp and Auxiliary Driving Lamps. If a vehicle is equipped with either fog lamps or auxiliary driving lamps they shall be properly aimed. Fog lamps shall be mounted on the front of the vehicle at a height not more than 30 inches or less than 12 inches above the level surface on which a vehicle stands. Only two fog lamps are allowed by law. Auxiliary driving lamps shall be mounted on the front of the vehicle at a height not more than 42 inches or less than 16 inches above the level surface on which the vehicle stands. Only two auxiliary driving lamps are allowed by law. The mounting heights of auxiliary driving lamps do not apply to emergency vehicles.

Procedures: Reject Vehicle If:
(1) Auxiliary Driving or Fog Lamp Aim Inspection:
 (a) Under the same procedure as for headlamp inspection switch on the lamps and observe the location of the high intensity zone or hot spot on the screen.
 (b) Symmetrical Beam: When properly aimed, the center of the high intensity zone is set 4 inches below the horizontal centerline of the lamp and centered on the vertical centerline.
 (c) Asymmetrical Beam: When properly aimed, the center of the high intensity zone is set 7 inches below a horizontal centerline of the lamp and centered on the vertical centerline.
 (d) Measure height of auxiliary driving or fog lamp.
(1) Symmetrical:
 (a) Center of high intensity zone is more than:
   (i) Horizontally: 4 inches left, or 4 inches right of the vertical centerline; or
   (ii) Vertically: Less than 4 inches below the horizontal centerline.
(2) Asymmetrical Beam: Same as low beam headlamps:
 (a) Center of high intensity zone is more than:
   (i) Horizontally: 4 inches left, or 4 inches right of the vertical centerline; or
   (ii) Vertically: Less than 7 inches below the horizontal centerline.
(3) Fog lamps or auxiliary driving lamps are mounted higher or lower than allowed.
(4) Vehicle is equipped with more than two fog lamps.
(5) Vehicle is equipped with more than two auxiliary driving lamps.

E. Definitions.

(1) "Asymmetrical beam" (nonsymmetrical) means a beam in which both sides are not symmetrical with respect to the median vertical plane of the beam. All lower beams are asymmetrical.

(2) "Back-up lamp" means a lamp used to provide illumination behind the vehicle, and to provide an indicator when the vehicle is in reverse gear.

(3) "Clearance lamp" means (on trucks and buses 80 inches or more wide) a lamp which shows to the front or rear of a vehicle, mounted on the permanent structure of the vehicle as near as practicable to the upper left and right extreme edges to indicate overall width and height of the vehicle.

(4) "Cornering lamp" means a steadily burning lamp used when the turn signal system is operating to supplement the headlamps by providing additional road illumination in the direction of the turn.

(5) "Driving lamp" means the auxiliary lamp or lamps that may be used to supplement the upper beam of the regular headlamps.

(6) "Emergency warning lamp" means a lamp which provides a flashing light to identify an authorized vehicle on an emergency mission. The emergency signal may be an oscillating lamp, a rotating beacon, or pairs of alternately or simultaneously flashing lamps.

(7) "Fog lamps" means a lamp which may be used with the lower beam headlights to provide illumination under condition of rain, snow, dust, or fog.

(8) "Hazard warning lamp" means a turn signal lamp which flashes simultaneously to warn of the presence of a vehicular hazard.

(9) Headlamps.

(a) Five and 3/4 Inch Round Sealed Beam Unit.

(i) "Type 1 sealed beam unit" means a sealed beam unit 5 3/4 inches in diameter having a single filament and providing only an upper beam distribution of light. This unit is identified by a number 1 on the lens and is aimed on the upper beam.

(ii) "Type 2 sealed beam unit" means a sealed beam unit 5 3/4 inches in diameter having two filaments, one filament providing the lower beam and one filament providing fill-in light for the upper beam. This unit is identified by a 2 on the lens and is aimed on the lower beam.

(b) "Seven Inch Round Sealed Beam Unit" means a sealed beam unit 7 inches in diameter providing an upper and lower beam. This unit is identified by a number 2 on the lens and is aimed on the lower beam. If there is no identifying number on lens, it means a sealed beam unit 7 inches in diameter providing an upper and lower beam. It is aimed on the upper beam.

(c) "Eight Inch by 5 Inch Rectangular Sealed Beam Unit" means a sealed beam unit providing an upper and lower beam. This unit is identified by a number 2B on the lens and is aimed on the lower beam.

(d) Six 1/2 by 4 1/2 Inch Rectangular Sealed Beam Unit.

(i) Type 1A—means a sealed beam unit having a single filament and providing only an upper beam distribution of light. The unit is identified by a number 1A on the lens and is aimed on the upper beam.

(ii) Type 2A—means a sealed beam unit having two filaments, one filament providing fill-in light for the upper beam. This unit is identified by a number 2A on the lens and is aimed on the lower beam.

(e) "Bulb and reflector headlamps" means a lamp assembly providing an upper and lower beam light by means of a replaceable bulb. These lamps are aimed on lower beam. They shall be capable of producing at least 5,000 candlepower output on upper beam and 3,500 candlepower output on lower beam, and must be capable of being aimed.

(f) 5.93 x 3.64 Inch Rectangular Sealed Beam Unit.

(i) Type LF—sealed beam unit having a single beam filament and providing only a lower beam distribution of light. The unit is identified by the designation LF on the lens. A special aimer adapter is required for aiming, and aiming must be accomplished in accordance with the manufacturer's recommended procedures.

(ii) Type UF—sealed beam unit having a single beam filament and providing only a upper beam distribution of light. The unit is identified by the designation UF on the lens. A special aimer adapter is required for aiming, and aiming (if applicable) must be accomplished in accordance with the manufacturer's recommended procedures.

(10) "Headlamp lower beam" means a distribution of light so directed as to avoid glare in the eyes of oncoming drivers while providing illumination ahead of the vehicle and intended for use in congested areas and on highways when meeting other vehicles within a distance of 500 feet.

(11) "Headlamp upper beam" means a distribution of light intended primarily for distant illumination and for use on the open highway when not meeting other vehicles.

(12) "Identification lamps" (on trucks and buses 80 inches or more wide) means lamps used in groups of three, in a horizontal row, which show to the front or rear or both, having lamp centers spaced not less than 6 or more than 12 inches apart, mounted on the permanent structure as near as practicable to the vertical centerline and the top of the vehicle, to identify certain types of vehicles.

(13) "Indicator lamp" means a lamp visible to the operator of a vehicle that indicates:

(a) Appropriate electrical circuits are in operation;

(b) Malfunction of vehicle performance; and

(c) Requirement for remedial action by the operator of the vehicle.

(14) "Lane changer" means a device, usually incorporated in the turn signal switch which will actuate the turn signal lamps when held by the driver. It is intended for momentary use for signaling a lane change. When released by the operator, it will return to neutral and de-activate the signal lamp.

(15) "License plate lamp" means a lamp used to illuminate the license plate on the rear of a vehicle.

(16) "Operating units or switches" means devices by which the functioning lamps are controlled.

(17) "Parking lamp" means lamps used to designate the front of a parked vehicle.

(18) "Passing lamp" means an auxiliary lamp or lamps that may be used to supplement the low beam of a standard headlamp system. It is not intended for winding roads or congested city areas.

(19) "Reflective devices" means a device used on vehicles to give an indication to an approaching driver by reflected light from the headlamps of approaching vehicles.

(20) "SAE Lighting Identification Code" means a series of standardized markings for lighting devices which a manufacturer or a supplier may use to mark his product to indicate the SAE lighting standard or standards to which the device is designed to conform. The code is not intended to limit the manufacturer or supplier in applying other markings to the devices.

(21) "Sealed beam headlamp assembly" means a major lighting device used to provide general illumination ahead of the vehicle. It consists of the following:

(a) One or more sealed beam units (bulb assembly);

(b) Means for mounting securely to the vehicle;

(c) Means to permit required aim adjustment.

(22) "Sealed beam unit" means an integral and hermetically sealed optical assembly with the name "Sealed Beam" molded in the lens.

(23) "Side marker lamp" means a lamp on the left and right sides, beamed to the side, and intended to indicate vehicle length. They are located near the front and rear on each side and, for vehicles over 30 feet in length, are also located at the midpoint (intermediate side marker).

(24) "Stop lamp" means a lamp giving a steady warning light to the rear of a vehicle, to indicate the intention of the operator of the vehicle to reduce speed or stop.

(25) "Symmetrical beam" means one in which both sides are symmetrical with respect to the median vertical plane of the beam. Lamps having symmetrical beam are:

(a) Five 3/4 inch diameter type I;

(b) Five 3/4 inch diameter type 2 (upper beam filament);

(c) Six 1/2 by 4 1/4 inch type 1A;

(d) Six 1/2 by 4 1/4 inch type 2A (upper beam filament);

(e) Eight by five inch type 2B (upper beam filament);

(f) All 7 inch diameter units (upper beam filament).

(26) "Tail lamp" means a lamp used to designate the rear of a vehicle.

(27) "Turn signal lamp" means a lamp which provides a flashing warning light to indicate the intended direction of the turn.

F. SAE Identification Code (J759C SAE Handbook).

(1) The following list is an identifying code for lights and signaling devices:

 Device SAE Identification
Code Designation
(a) Reflex Reflectors:
 (i) Class A A
 (ii) Class B (used before 1969 only) B
(b) Motorcycle and motor driven cycle turn signal lamps D
(c) Side turn signal lamps—vehicles 30 ft. (9.1m) or more in length E
(d) Side turn signal lamps—vehicles less than 30 ft. (9.1m) in length E2
(e) Fog lamps F
(f) Sealed beam headlamps (marking applies to housing or unit) H
(g) Turn signal lamps—Class A I
(h) Turn signal lamps—Class A spaced less than 4 in. (102mm) from headlamp I2
(i) Turn signal flasher J590e or J5906
(j) Hazard warning signal flasher J945b or J945
(k) Warning lamp alternating flasher J1054
(l) Cornering lamps K
(m) License plate lamps L
(n) Motorcycle and motor driven cycle headlamps—motorcycle type M
(o) Motor cycle and motor driven cycle headlamps—motor driven cycle type N
(p) Spot lamps O
(q) Parking lamps P
(r) Clearance or side marker or identification lamps P1 or P2
(s) Combination clearance and side marker lamps PC
(t) Turn signal operating units Class A Q
(u) Turn signal operating units Class B QB
(v) Vehicular hazard warning signal operating unit QC
(w) Backup lamps R
(x) Stop lamps S
(y) Tail lamps T
(z) Supplemental high mounted stop and turn signal lamps U
(aa) Liquid burning emergency flares V
(bb) Warning lamps for emergency, maintenance and service vehicles W or W1
(cc) Warning lamps for school buses W2
(dd) 360-degree emergency warning lamps W3
(ee) Emergency warning device W4
(ff) Electric emergency lanterns X
(gg) Driving lamps Y
(hh) Auxiliary low beam lamps Z

(2) All equipment for testing headlamps shall comply with the Society of Automotive Engineers Recommended Practice for Headlamp Inspection Equipment.

G. Headlamp Testing Machines.

(1) Headlamp Testing Machine. When a headlamp testing machine is used, it shall give results equivalent to those obtained using a screen. It shall be in good repair and adjustment, and shall be used in accordance with the manufacturer's instructions. A machine using a photoelectric cell or cells to determine aim should also have a visual screen upon which the beam pattern is projected proportionally to its appearance and aim on a screen at 25 feet. The visual screen shall be plainly visible to the operator and have horizontal and vertical reference lines to permit visual appraisal of the lamp beam.

(2) Mechanical Aimer (applicable to school vehicles only). When a mechanical aimer is used, it shall be in good repair and adjustment, and shall be used according to the manufacturer's instruction and shall be calibrated to the slope of the floor on which the vehicle stands.

(3) Screen (applicable to school vehicles only). When a screen is used, it should be 5 feet high x 12 feet wide with a matte white surface well shaded from extraneous light, and properly adjusted to the floor on which the vehicle stands. Provisions may be made for moving the screen so that it can be aligned parallel with the rear axle so that a horizontal line drawn perpendicularly from the centerline of the screen will pass an equal distance midway between the two headlamps. The screen shall be provided with a fixed vertical centerline, two laterally adjustable vertical tapes, and one vertically adjustable horizontal tape.