November 19, 2019 

 1200 New Jersey Ave., SE

Washington, D.C. 20590 

In Reply Refer To: 

HSST-1 / WZ-361 

Mr. Craig Mr. Schulz 

Pexco, LLC 

3110 70th Ave East 

Tacoma, WA 98424 

Dear Mr. Schulz: 

This letter is in response to your May 11 , 2018 request for the Federal Highway Administration 

(FHWA) to review a roadside safety device, hardware, or system for eligibility for 

reimbursement under the Federal-aid highway program. This FHW A letter of eligibility is 

assigned FHW A control number WZ-361 and is valid until a subsequent letter is issued by 

FI;-IWA that expressly references this device. · 

' 

Decision ' 

The following devices are eligible within the length-of-need, with details provided in the form 

which is attached as an integral part of this letter: 

• Interstate Grade Curb 

Scope of this Letter 

To be found eligible for Federal-ai,d funding, new roadside safety devices should meet the crash 

test and evaluation criteria contained in the American Association of State Highway and 

Transportation Officials'(AASHTO) Manual for Assessing Safety Hardware (MASH). 

However, the FHWA, the Department of Transportation, and the United States Government do 

not regulate the manufacture of roadside safety devices. Eligibility for reimbursement under the 

Federal-aid highway program. does not establish approval, certification or endorsement of the 

device for any particular purpose or use. 

This letter is not a determination by the FHWA, the Department of Transportation, or the United 

States Government that a vehicle crash involving the device will result in any particular 

outcome, nor is it a guarantee of the in-service performance of this device. Proper 

manufacturing, installation, and maintenance are required in order for this device to function as 

tested. ' 

This finding of eligibility is limited to the crashworthiness of the system and does not cover other 

structural features, nor conformity with the Manual on Uniform Traffic Control Devices. 
2 

Eligibility for Reimbursement 

Based solely on a review of crash test results and certifications submitted by the manufacturer, 

and the crash test laborator)l, FHW A agrees that the device described herein meets the crash test 

and evaluation criteria of the American Association of State Highway and Transportation 

Officials' Manual for Assessing Safety Hardware (MASH). Therefore, the device is eligible for 

reimbursement under the Federal-aid highway program if installed under the range ohested 

conditions. 

Name of system: Interstate Grade Curb 

Type of system: Work Zone 

Test Level: MASH Test Level 3 

Testing conducted by: Texas A & M Transportation Institute 

Date of request: May 11 , 2018 

FHW A concurs with the recommendation of the accredited crash testing laboratory as stated 

within the attached form. 

Full Description of the Eligible Device 

The device and supporting documentation, including reports of the crash tests or other testing 

done, videos of any crash testing, and/or drawings of the device, are described in the attached 

form. 

Notice 

This eligibility letter is issued for the subject device as tested. Modifications made to the device 

are not covered by this letter. Any modifications to this device should be submitted to the user 

(i.e. state DOT) as per their requirements. 

You are expected to supply potential users with sufficient information on design, installation and 

maintenance requirements to ensure proper performance. 

You are expected to certify to potential users that the hardware furnished has the same chemistry, 

mechanical properties, and geometry as that submitted for review, and that it will meet the test 

and evaluation criteria of AASHTO's MASH. 

Issuance of this letter does not convey property rights of any sort or any exclusive privilege. This 

letter is based on the premise that information and reports submitted by you are accurate and 

correct. We reserve the right to modify or revoke this letter if: ( 1) there are any inaccuracies in 

the information submitted in support of your request for this letter, (2) the qualification testing 

was flawed, (3) in-service performance or other information reveals safety problems, (4) the 

system is significantly different from the version that was crash tested, or (5) any other 

information indicates that the letter was issued in error or otherwise does not reflect full and 

complete information about the crash worthiness of the system. 
3 

Standard Provisions 

• To prevent misunderstanding by others, this letter of eligibility designated as FHWA 

control number WZ-361 shall not be reproduced except in full. This letter and the test 

documentation upon which it is based are public information. All such letters and 

documentation may be reviewed upon request. 

• This letter shall not be construed as authorization or consent by the FHW A to use, 

manufacture, or sell any patented system for which the applicant is not the patent holder. 

• This FHW A eligibility letter is not an expression of any Agency view, position, or 

determination of validity, scope, or ownership of any intellectual property rights to a 

specific device or design. Further, this letter does not impute any distribution or licensing 

rights to the requester. This FHW A eligibility letter determination is made based solely 

on the crash-testing information ~ubmitted by the requester. The FHW A reserves the 

right to review and revoke an earlier eligibility determination after receipt of subsequent 

information related to crash testing. 

Sincerely, 

Michael Griffith 

Director, Office of Safety Technologies 

Office of Safety 

Enclosures 
Version 10.0 (05/16) 

Page 1 of 3 

Request for Federal Aid Reimbursement Eligibility 

of Highway Safety Hardware 

Date of Request: 

Name: 

May 11, 2018 

Craig Schulz 

I (e New (' Resubmission 

... 

...

...

QI

.E 

..c 

::, 

Ill 

Company: Pexco,LLC 

Address: 3110 70th Ave East 

Tacoma, WA 98424 

Country: USA 

- To : Michael S. Griffith, Director 

FHWA, Office of Safety Technologies 

I request the following devices be considered eligible for reimbursement under the Federal-aid 

highway program. 

Device & Testing Criterion - Enter from right to left starting with Test Level Fl 

System Type Submission Type Device Name/ Variant Testing Criterion Test 

Level 

'WZ': Crash Worthy Work 

Zone Traffic Control Devices 

(e Physical Crash Testing 

(' Engineering Analysis 

Interstate Grade Curb 

AASHTO MASH TL3 

By submitting this request for review and evaluation by the Federal Highway Administration, I certify 

that the product(s) was (were) tested in conformity with the AASHTO Manual for Assessing Safety 

Hardware and that the evaluation results meet the appropriate evaluation criteria in the MASH. 

Individual or Organization responsible for the product: 

Contact Name: Craig Schulz Same as Submitter IZJ 

Company Name: Pexco,LLC Same as Submitter IZJ 

Address: 3110 70th Ave East 1--- -- \,\II\ f"\nA"""IJI Same as Submitter IZJ 

Country: USA Same as Submitter IZJ 

Enter below all disclosures of financial interests as required by the FHWA ' Federal-Aid Reimbursement 

Eligibility Process for Safety Hardware Devices' document. 

Pexco, LLC is a manufacturer of plastic roadway devices used both in the work-zone and also in permanent 

applications around the world. The Interstate Grade (IG) Curb System was developed by the engineering 

department of Pexco, it is a design owned by Pexco with no patents issued or applied for. 

Pexco sponsored testing of the IG Curb to MASH TL3 at Texas A&M Transportation Institute (TTI) an 

independent, accredited ISO 17025 testing laboratory and facility. The IG Curb was previously tested at TTI in 

2002 and was issued WZ-193 and a later amendment, under NCHRP 350 test procedures. This product has since 

provided years of safe applications and use around the world. The full scale crash testing was completed by TTI 

in accordance with MASH 3-90 and 3-91, with both the 11 00C and 2270P vehicles in the Fall of 2016. 
Version 10.0 (05/16) 

Page 2 of 3 

PRODUCT DESCRIPTION 

(e New Hardware or (' Modification to 

• Significant Modification Existing Hardware 

The Interstate Grade Curb System is a 38" long x 8" wide by 2.0" high thermoplastic molded plastic longitudinal 

channelizing device. The Interstate Grade Curb is intended to be used as a continuous application developed 

for high speed applications were a continuous conceived barrier to entry is wanted. The Interstate curb system 

is designed to nest under the previous curb, with the use of a end cap to finish a run. The Interstate Grade Curb 

is designed to be used with the FG300 Flexible Channelizing Tubular Markers to enhance the delineation of the 

system creating a picket fence look when deployed in the field. 

CRASH TESTING 

By signature below, the Engineer affiliated with the testing laboratory, agrees in support of this submission that 

all of the critical and relevant crash tests for this device listed above were conducted to meet the MASH test 

criteria. The Engineer has determined that no other crash tests are necessary to determine the device meets 

the MASH criteria. 

Engineer Name: Dusty Arrington

Digitally signed by Dusty Arrington 

ON: cn=Dusty Amngton, o=TeKas A&M Transportat10n Institute, ou=Roadside Engineer Signature: Dusty Arrington sarety and Physical Security D1v1s10n, email=d•arrington@tti.tamu.edu, t =US

Date: 2018.05.10 13:10:56 -05'00' 

Address : 2427 Earl Rudder Freeway, College Station, TX Same as Submitter O

Country: USA Same as Submitter O

A briet description of each crash test and its result: 

Required Test 

Number 

Narrative 

Description 

Evaluation 

Results 

3-90 & 3-91 

3-90 involves the use of 11 00C small car 

3-91 involves the use of 2270P light truck 

Both vehicles impacted the longitudinal 

channelizer at a nominal speed of 62 mi/h 

at the critical angles (CIA) between 0-25 

degrees as determined to maximize the risk 

of rollover and/or excessive vehicle 

deceleration. 36" Flexible delineator posts 

were installed in the system and subjected 

to all testing, there was no loss of 

delineators in testing. 

PASS 

Full Scale Crash Testing was done in compliance with MASH by the following accredited crash test 

laboratory (cite the laboratory's accreditation status as noted in the crash test reports.): 
. h Digitally signed by Craig Schulz 

Submitter Signature*: (ra1g Sc u I z Date,2018.04.2610,37A8 

-07'00' 

Version 10.0 (05/16) 

Page 3 of 3 

Laboratory Name: Texas A & M Transportation Institute 

Laboratory Signature: Darrell L. Kuhn Digitally signed by Darrell L. Kuhn 

Date: 2018.05.11 10:42:45 -05'00' -

Address : 3135 TAMU, College Station, TX 77843 Same as Submitter D 

Country: USA Same as Submitter D 

Accreditation Certificate ISO 17025 

Number and Dates of current A2LA Laboratory Testing Certificate #2821.01 

Accreditation period : Accreditation Valid Through April 30, 2019 

Submit Form 

ATTACHMENTS 

Attach to this form: 

1) Additional disclosures of related financial interest as indicated above. 

2) A copy of the full test report, video, and a Test Data Summary Sheet for each test conducted in 

support of this request. 

3) A drawing or drawings of the device(s) that conform to the Task Force-13 Drawing Specifications 

[Hardware Guide Drawing Standards]. For proprietary products, a single isometric line drawing is 

usually acceptable to illustrate the product, with detailed specifications, intended use, and contact 

information provided on the reverse. Additional drawings (not in TF-13 format) showing details that 

are relevant to understanding the dimensions and performance of the device should also be submitted 

to facilitate our review. 

FHWA Official Business Only: 

Eligibility Letter 

Number Date Key Words 
-, 

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z 

0 

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Test No. 690900-DTC19-5: Test No. 690900-DTC19-6: Test No. 690900-DTC19-7: Test No. 690900-DTC19-8: N 

N At 25 De2rees At 15 De2rees At 0 De2ree Lane Chan2in2 Maneuver 

General Information 

Test Agency ........................ Texas A&M Transportation Institute (TTI) 

Test Standard Test No ........ MASH Test 3-90 

TTI Test No ........ ................ 690900-DTC19-5 through 8 

Test Date ............................ 2016-10-06 

Test Article 

Type ................................... Channelizer 

Name .......................... ........ Interstate Grade Curb System 

Installation Length .... ........... 126 ft-8 inches and 31 ft-8 inches 

Material or Key Elements .... 50 sections of FG300 Curb with 4 coil 

anchors with FG336 Model EFX Post and 

two 3-inch x 9-inch AR1000 Wraps 

Soil Type and Condition ...... Concrete Surface, Dry 

Test Vehicle 

Type/Designation ................ 11 00C 

Make and Model ....... .. ..... .. . 2006 Kia Rio 

Impact Conditions 

Speed 

Angle 

Kinetic Energy 

mi/h 

15, 0 degrees 

Plus lane change 

Occupant Risk Values ............. Data not recorded 

Post-Impact Trajectory .... .... ... . N .A 

Vehicle Stability 

Vehicle Snagging ... .......... ......No 

Vehicle Pocketing ... ................ No 

Vehicle Roll. .... ....................... No 

Vehicle Damage 

VDS ...................... ............ .. .... 12FD0 

CDC ........................................ 12FDEW0 

Max. Exterior Deformation ...... None 

Damage to vehicle after 

Test Nos. 690900-DTC19-5 through 8. 

Curb .. ...... .... ... ..................... 2472 lb 

N Test Inertial. ... ...... ............... 2420 lb 0 Driver ........ .. ........................ 220 lb --.J 

I Gross Static ........... .... ......... 2640 lb 

0 

N 

OCDI ...................................... LF0000000 

Maximum Occupant 

Compartment Deformation .. None 

Figure 6.11. Summary of Results for MASH Test 3-90 on Interstate Grade Curb System. v-, 

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Test No. 690900-DTC19-1: Test No. 690900-DTC19-2: Test No. 690900-DTC19-3: 

At 25 De2rees At 15 De2rees At 0 De2ree O'I 

General Information 

Test Agency ........................ Texas A&M Transportation Institute (TTI) 

Test Standard Test No . ....... MASH Test 3-90 

TTI Test No . ........... ........ .... 690900-DTC19-1 through 4 

Test Date .. ....................... .. . 2016-10-06 

Test Article 

Type ............. ... ................ .. . Channelizer 

Name ... ....... .... ........ .... ... ..... Interstate Grade Curb System 

Installation Length .... ........... 126 ft-8 inches and 31 ft-8 inches 

Material or Key Elements ... . 50 sections of FG300 Curb with 4 coil 

anchors with FG336 Model EFX Post and 

two 3-inch x 9-inch AR1000 Wraps 

Soil Type and Condition .. .... Concrete Surface, Dry 

Test Vehicle 

Type/Designation ................ 2270P 

Make and Model ................. 2011 Dodge RAM 1500 

Curb ................................. ... 4954 lb 

Test Inertial .. .. ..................... 5018 lb N Driver .................... .............. 220 lb 

Gross Static .. ....... .. ............. 5238 lb 

0 

-..J 

I 

0 

Impact Conditions 

Speed .......... ....... .... ... .. ......... . .62 mi/h 

Angle ............. ........................ 25, 15, 0 degrees 

Plus lane change 

Kinetic Energy ........................ . 

Occupant Risk Values ............. Data not recorded 

Post-Impact Trajectory 

Stopping Distance ........ ........ .. N.A. 

Vehicle Stability 

Vehicle Snagging .. .. ..... .......... No 

Vehicle Pocketing .. .. ............... No 

Vehicle Roll .. ..... .... ........... ... ... No 

Vehicle Damage 

VDS ....................................... 12FD0 

CDC ........................................ 12FDEW0 

Max. Exterior Deformation ...... None 

OCDI .......... .. ..... .. ... ... ........ ..... LF0000000 

Maximum Occupant 

Compartment Deformation .. None 

Test No. 690900-DTC19-4: 

Lane Chanttin2 Maneuver 

Damage to vehicle after 

Test Nos. 690900-DTC19-1 through 4. 

N Figure 5.11. Summary of Results for MASH Test 3-91 on the Interstate Grade Curb System. 

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ENG_ll£ERING MANAGER DATE 

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Figure 2.1. Details of the Interstate Grade Curb System with 36-inch Tall Model EFX Post.