400 Seventh St., S.W. Washington, DC 20590

In Reply Refer To: 

HSSD/WZ­242 

Mr. Chris Goode 

Vice President of Sales

Bone Safety Signs

2151 Northwest Parkway, SE ­ Suite 100 

Marietta, GA 30067 

Dear Mr. Goode: 

Thank you for your correspondence requesting the Federal Highway Administration (FHWA)

acceptance of your company’s SZ­412­2S Portable Sign Stand with 48 x 48 inch, 0.080 inch 

thick solid aluminum signs for use in work zones on the National Highway System (NHS). Accompanying your letter was the FHWA Office of Safety Design form you completed and a 

DVD compilation of relevant crash tests. You requested that we find this sign stand acceptable 

for use on the NHS under the provisions of the National Cooperative Highway Research 

Program (NCHRP) Report 350 “Recommended Procedures for the Safety Performance

Evaluation of Highway Features.” 

This letter is the acknowledgement of the FHWA’s acceptance of your request. The results of

the testing met the FHWA requirements, and therefore, the device detailed in the enclosed 

drawing is acceptable for use on the NHS under the range of conditions tested, when proposed 

by a State.

A PDF version of your completed form has been modified by the addition of the FHWA

acceptance letter number and the date of our review. The form, of which a copy is enclosed for

reference, will be posted to our Web site in the near future.  Please note that future submissions

must include an electronic copy of the form that may be edited, plus a hard copy signed by the 

engineer from the crash test laboratory.

Thank you for working with us as we institute this new review and acceptance process.

Sincerely yours,

John R. Baxter, P.E.

Director, Office of Safety Design 

Office of Safety 

Enclosures

February 26, 2007
Pa2e1

Contact Info

Signature

Telephone#

EmailAddress

Check One:

Q

D

Signature

Telephone #

Email Address

Kevwords:

III

Device Name

Detailed Desc.

Of Device,

Materials, sizes,

Fasteners,

Substrates

Foundation,

Aux. Features

Ballast, etc.

.-------.--

Attachment 1

FEDERAL IDGHWAY ADMINISTRATION Letter Number

OFFICE OF SAFETY DESIGN ; I/IZ-2lf'l.

Category 2 Work Zone Device AcceptanceLetter Date (

II

Petitioner I Developer Name and Address:

Bone Safety Signs

c/o Chris Goode

2151 Northwest Parkway SE, Ste 100

Marietta, GA 30067

fUlL

770-333-1635

chris@bonesafetv.com

Laboratory I Engineer Name and Address

Karco Engineering LLC

9270 Holly Road

Adelanto, CA 92301

I hereby certify that the testing that supports this Acceptance Letter was conducted in

accordance with NCHRP Report 350 guidelines, that the device(s) tested is/are

accurately described on this form, and that the test results indicate that the device

meets all applicable NCHRP Report 350 evaluation criteria.

I have evaluated the requested modifications to these devices previously found

acceptable by the FHW A in Acceptance Letter WZ--, and hereby certify that. in

my opinion, the modifications do not adversely affect the crash performance of the

devices. I also certify that these devices are accurately described on this form.

---~

770-333-1635

chris@bonesafety.com

licable: (See Page 3)

ea.

Attached in Karco Report

- u- u.. u.
Pae:e2

I

"'" iJI!

Alternative

Attachment 1

FEDERAL IllGHW AY ADMINISTRATION Letter Number

OFFICE OF SAFETY DESIGN W~ z'f2

Category 2 Work Zone Device Acceptance Letter Date: - .

Mandatory Attachments

Attachment # 1: Test data summ a e(s)

Attach. #la Test # 3-71

Attach. #lb Test #

Attach. #lc Test #

Attach. #ld Test #

Attachment # 1: Description and discussion of modification(s)to

crash tested and/or acceDteddevice.

Date:

Attachment # 2: PDF drawin (s) of device(s)

Attach. #2a Drawing Title: Manufacturer's

Drawing#:Fiqure 1

Drawing Title:

Drawing #:

Drawing Title:

Drawing #:

Drawing Title:

Drawing #:

Drawing Title:

Drawing #:

Drawing Title:

Drawing #:

Drawing Title:

Drawing #:

Drawin of I Test Article

Attach. #2b

Attach. #2c

. Attach. #2d

Attach. #2e

Attach. #2f

Attach. #2
Attachment 1

FEDERALmGHW AY ADMINISTRATION LetterNumber

OFFICEOFSAFETYDESIGN ~z.- 2l.f'2

Category 2 Work Zone Device Acceptance Letter Date..

'2..-

Please select from the following Keywords for "Type of Device":

Longitudinal Channelizing Barricade

Curb (Curb channelizersystem with or without road tubes or other channelizers)

Drum

H-Footprint Sign Stand

X-Footprint Sign Stand

Trailer Mounted Signs (Does not include arrow boards or variable message signs or other

Category 4 trailer mounted devices.)

Automated Flagger Device (not trailer mounted)

Tripod Sign Stand

Type I Barricade

Type II Barricade

Type III Barricade

Vertical Panel

Intrusion Detector

Ballast (Action relates to ballast on one or more devices)

Channelizer (Individual units unlike cones,road tubes, or drums)

Please select from the following Keywords for "Sign Substrate":

Roll-up I Fabric (with fiberglassspreaders- aluminumor steel spreaders are not allowed.)

Plywood

Aluminum - Solid

Aluminum - Laminate

Corrugated Plastic

Extruded Plastic

Waffleboard Plastic

Wood I Lumber

Please select from the following Keywords for "Height of Sign":

The distance to the lowest point on the sign is:

Low

Mid-A

Mid-B

Mid-C

Tall

Oversized

12 to 18 inches above the pavement

20 to 24 inches above the pavement

25 to 36 inches above the pavement

37 to 59 inches above the pavement

60 to 71 inches above the pavement

72 inches and taller
Attachment 1

Paee 4 FEDERAL IDGHW AY ADMINISTRATION Letter Number

OFFICE OF SAFETY DESIGN ;- VVz.-~ 2-

Category 2 Work Zone Device Acceptance Letter Date'

L 1-

Please note the following standard provisionsthat apply to FHWA letters of acceptance:

. Our acceptance is limited to the crashworthinesscharacteristics of the devices and does not

cover their structural features, or conformity with the Manual on Uniform Traffic Control

Devices.

. Any changesthat may adversely influence the crashworthinessof the device will require a

new acceptance letter.

. Should the FHWA discover that the qualificationtesting was flawed, that in-service

performance reveals unacceptable safety problems, or that the device being marketed is

significantly different from the version that was crash tested, it reserves the right to modify

or revoke its acceptance.

. You will be expected to supply potential users with sufficient information on design and

installation requirementsto ensure proper performance.

. You will be expected to certify to potential usersthat the hardware furnished has

essentially the same chemistry, mechanical properties, and geometry as that submitted for

acceptance, and that they will meet the crashworthinessrequirements of FHWA and

NCHRP Report 350.

. To prevent misunderstandingby others, this letter of acceptance shall not be reproduced

except in full. This letter, and the test documentationupon which this letter is based, is

public information. All such letters and documentationmay be reviewed at our office upon

request.

. If the subject of this letter is a patented device it is considered "proprietary." The use of

proprietary work zone traffic control devicesin Federal-aid projects is generally of a

temporary nature. They are selected by the contractorfor use as needed and removed upon

completion of the project. Undersuch conditionsthey can be presumed to meet

requirement "a" given below for the use of proprietary products on Federal-aid projects.

On the other hand, if proprietary devices are specified by a highway agency for use on

Federal-aid projectsthey: (a) mustbe supplied through competitive bidding with equally

suitable unpatented items; (b) the highway agency must certify that they are essential for

synchronization with existing highway facilities or that no equally suitable alternative

exists or; (c) they must be used for research or for a distinctive type of construction on

relatively short sections of road for experimentalpurposes. Our regulations concerning

proprietary products are contained in Title 23, Code of Federal Regulations, Section

635.411, a copy of which is enClosed.

. This Acceptance Letter shall not be construed as authorization or consent by the Federal

Highway Administration to use, manufacture, or sell any patented device for which the

applicant is not the patent holder. The Acceptance Letter is limited to the crashworthiness

characteristics of the candidate device, and the FHWA is neither prepared nor required to

become involved in issues concerningpatent law. Patent issues, if any, are to be resolved

by the applicant.

- - - ---- - -- - -- - --- - -.
DATA SHEET NO. 3

SUMMARY OF RESULTS FOR TEST NO. 3-71

GENERAL INFORMATION OCCUPANT RISK 

TEST AGENCY KARCO ENGINEERING FLAIL SPACE VELOCITY (m/sec) 

TEST NO. 3-71 X-DIRECTION 

DATE 12/15/2005 Y-DIRECTION 

TEST ARTICLE THIV (optional) 

TYPE Bone Safety 412 2S Spring Loaded 4X4 Sign Stand RIDEDOWN ACCELERATION (g’s) 

INSTILLATION LENGTH (m) X-DIRECTION 

SIZE AND/OR DIMENSION OF KEY ELEMENTS Y-DIRECTION 

SOIL TYPE AND CONDITION CONCRETE PHD (optional)

TEST VEHICLE 820C ASI (optional) 

TYPE PRODUCTION TEST ARTICLE DEFLECTIONS (m) 

DESIGNATION 3-71 DYNAMIC 

MODEL GEO METRO PERMANENT 

MASS (CURB) 804 (1772 lbs) VEHICLE DAMAGE

MASS (TEST INERTIAL) 820 (1808 lbs) EXTERIOR 

DUMMY(s) MASS 75 Kg (165 Ibs) VDS 

GROSS STATIC WEIGHT 897 (1978 lbs) CDC 

IMPACT CONDITIONS INTERIOR 

SPEED (km/h) 103.6(64.39 mph)/ 103.8(64.48 mph) OCDI 

ANGLE (Deg.) 90 / 0 

IMPACT SEVERITY (kJ) 340 POST IMPACT VEHICULAR BEHAVIOR 

EXIT CONDITIONS MAXIMUM ROLL ANGLE (Deg.) 

SPEED (km/h) 98.35 (61.11 mph) MAXIMUM PITCH ANGLE (Deg.) 

ANGLE (Deg.) 90 / 0 MAXIMUM YAW ANGLE (Deg.) 

10 
tx' <-

@~

.

.

~ THESE .100" WALL ALUMINUM TELESCOPING

/" TUBESWOULDBE REPLACEDWITH.065 WALL

STEEL TELESCOPINGTUBES.

FIGURE 1: MANUFACTURER'S DRAWING OF TEST ARTICLE

E -1 TR-P25129-01-NC
Specifications for the SZ-412-2S: 

Folded Dimensions: 

 HEIGHT 47.25” 

 WEIGHT 31 LBS. (37 LBS. w/mast and brackets) 

 AREA 7” x 11.25” x 47.25” 

 STORAGE 2.15 cubic feet 

Deployed: 

 HEIGHT W/ Flags 108” 

 TOP OF SIGN 82” 

 BOTTOM OF SIGN 14” 

Foot Print: 

 FRONT 38.5” 

 SIDE 89” 

Springs: 

 Cylinder, Close Wound, Oil Tempered, Class II, Round 

Frame: 

 UV stabilized powder coated tubular steel frame with nut and bolt construction, 

mast made of annodized thick wall aluminum or a thin wall 0.065 and 0.083 tubular steel 

with the same tensile and elongation characteristics, which is a two piece, two position 

mast. 

Brackets: 

 The steel frame has an adjusting knob along with a 5/8” opening to accept 0.10” 

aluminum to plywood; top mounted 3 position flag bracket.