TYPICAL PROFILE

NOTE. BOLT MATERIAL 1S
ASTM A36 ROUND BAR

im 26° 1

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STANDARD me 000000
t, 1/4 DIAMETER SHAFT.

hy Hint

AN

STANDARD USS WASHER, Gr 5,

11/4" HEX NUT
CONNECTION BOLT


§63s.an)

these materials must occur in the
United States.

(2) The State has standard contract
provisions that require the use of do:
mestic materials and products, includ
ing stee) materials, to the same or
greater extent as the provisions set
forth in this section.

(3) The Btate elects to Include alter-
nate bid provisions for foreign and do-
mestic steel materials which comply
with the following requirements. Any
procedure for obtaining alternate bids
based on furnishing foreign steel ma.
terlals which Is acceptable to the Divi-
ston Administrator may be used. The
contract provisions must (1) require all
bidders to submit a bid based on fur-
nishing domestic steel materials, and
dD clearly state that the contract will
be awarded to the bidder who submits
the lowest total bid based on furnish-
ing domestic steel materials unless
such total bid exceeds the lowest total
bid based on furnishing foreign steel
materials by more than 25 percent.

(4) When steel materials are used In
a project. the requirements of this sec-
tion do not prevent a minimal use of
foreign steel materials, if the cost of
such materials used does not exceed
one-tenth of one percent (0.1 percent)
of the total contract cost or $2,500,
whichever is greater. For purposes of
this paragraph, the cost is that shown
to be the value of the steel products as
they are delivered to the project.

(cX1) A State may request a waiver
of the provisions of this section If;

() The application of those provi-
sions would be inconsistent with the
public interest; or

(HM) Steel materials/products are not
produced in the United States in suffi-
cient and reasonably available quanti-
tles which are of a satisfactory quality.

(2) A request for waiver, accompa-
nied by supporting Information, must
be submitted in writing to the Region-
al Federal Highway Administrator
(RFHWA) through the FHWA Divi-
sion Administrator. A request must be
submitted sufficiently in advance of
the need for the walver in order to
allew time for proper review and
action on the request. The RFHWA
will have approval authority on the re-
quest.

23 CFR Ch. | (4-1-93 Edition)

(3) Requests for walvers may be
made for specific projects, or for cer-
tain materials or products In specific
geographic areas, or for combinations:
of both, depending on the circum.
stances.

(4) The denial of the request by the
RFHWA may be appealed by the
State to the Federal Highway Admin-
istrator (Administrator), whose action
on the request shall be considered ad-
ministratively final.

(5) A request for a waiver which in-
volves nationwide public interest or
availability issues or more than one
FHWA region may be submitted by
the RFHWA to the Administrator for
action.

(6) A request for waiver and an
appeal from a denial of a request must
Include facts and Justification to sup-
port the granting of the walver. The
FHWA response to a request or appeal
will be In writing and made avaliable
to the public upon request. Any re-
quest for a nationwide walver and
FHWA‘s action on such a request may
be published in the FEDERAL RecisTar
for public comment.

(7) In determining whether the walv-
ers described In paragraph (cX1) of
this section will be granted, the
FHWA will consider all appropriate
factors including, but not limited to,
cost, administrative burden, and delay
that would be Imposed if the provision
were not waived.

(d) Standard State and Federal-ald
contract procedures may be used to
assure compliance with the require-
ments of this section

(23 U.B.C. 318, sec. 10 of Pub. L. 98-229, 98
Btat. 65, sec. of Pub. L. 97-424, 96 Btat.
2136 and 49 CFR 1.48(b))

(48 FR 53104, Nov. 26,
49 FR 18821, May 3, 1984)

as amended at

6635.411 Material or product selection.

(a) Federal funds shall not partici-
pate, directly or indirectly, in payment
for any premium or royalty on any
patented or proprietary material, spec-
ification, or process specifically set
forth in the plans and specifications
for a project, unless:

(1) Buch patented or proprietary
item ts purchased or obtained through

180

Federal Highway Administration, DOT

competitive bidding with equally suita
ble unpatented Items; or

(2) The State highway agency certi-
fles elther that such patented or pro-
prietary Item is essential for synchro-
nization with existing highway facill-
Ules, or that no equally suitable alter-
nate exists; or

(3) Buch patented or proprietary
item is used for research or for a dis-
tinctive type of construction on rela-
tively short sections of road for experi-
mental purposes.

(b) When there is available for pur-
chase more than one nonpatented,
nonproprietary material, semifinished
or finished article or product that will
fulfill the requirements for an Item of
work of @ project and these available
materials or products are Judged to be
of satisfactory quality and equally ac-
ceptable on the basis of engineering
‘analysis and the anticipated prices for
the related item(s) of work are estl-
mated to be approximately the same,
the PS&E for the project shall either
contain or include by reference the
specifications for each such material
or product that Is considered accepta-
ble for incorporation in the work. If
the State highway agency wishes to
substitute some other acceptable ma-
terial or product for the material or
product designated by the successful
bidder or bid as the lowest alternate,
and such substitution reuits in an in-
crease in coats, there will not be Feder-
al-aid participation in any increase in
coats.

(c) A State highway agency may re-
quire a specific material or product
when there are other acceptable mate-
rials and products, when such specific
choice is approved by the Diviaton Ad-
ministrator as being in the pubite in-
terest. When the Division Administra-
tor’s approval is not obtained, the item
will be nonparticipating unless bidding
procedures are used that establish the
unit price of each acceptable alterna-
tive. In this case Federal-afd participa-
tion will be based on the lowest price
so established.

(d) Appendix A sets forth the
FHWA requirements regarding (1) the
specification of alternative types of
culvert pipes, and (2) the number and
types of such alternatives which must

$ 635.417

be set forth in the specifications for
various types of drainage installations.

(e) Reference in specifications and
on plans to single trade name materi-
als will not be approved on Federal-ald
contracts.

8.635.413 Guaranty and warranty clauses.

(a) Except as provided in paragraph
(b) of this section, clauses that require
the contractor to guarantee or war-
rant materials and workmanship or to
otherwise maintain the work for a
specified pertod after its satisfactory
completion by the contractor and its
final acceptance by the State, will not
be approved for use In Federal-aid con-
tracts. Work performed and materials
replaced under such guaranty or war-
ranty clauses after final acceptance of
work are not eligible for Federal par-
ticipation.

(b) Contracts which involve furnish-
ing and/or installing electrical or me-
chanical equipment should generally
include contract clauses that require:

(1) Manufacturer's warranties or
guarantees on all electrical and me-
chanical equipment consistent with
those provided as customary trade
Practice, or

(2) Contractors’ warranties or guar-
antees providing for satisfactory in-
service operation of the mechanical
and electrical equipment and related
components for a period not to exceed
6 months following project accept-
ance.

9.685.417 Convict produced matertala.

(a) Materials produced by convict
labor may only be Incorporated in a
Federal-aid highway construction
project if such materials have been:

(1) Produced by convicts who are on
parole, supervised release, or proba-
tion from a prison or

(2) Produced in a qualified prison fa-
cility and the cumulative annual pro-
duction amount of such materials for
use in Federal-ald highway construc-
tion does not exceed the amount of
such materials produced tn such facili-
ty for use in Federal-aid highway con-
struction during the 12-month period
ending July 1, 1987.

(b) Qualtfied prison facility means
any prison facility in which convicts,

181


NOTE: H2 REBAR IS,
10 BE BENT AT A

3” RaOIUS.
NOTE: ALL BENDING OF SHEAR REBAR IS
b—_ sr — SPECIFIED AT A 2” RADIUS.
I
Dayar sq rir = poe
| T in
151/27 a VO sit
v2 gan a
(#5 BAR)
! f
hr 2
V2 BAR Mi gar
(4 4's, GRADE 40 winmuu) (9 4's, GRADE 40 minum)
REINFORCING STEEL DETAILS
1.1/2" NOM. DIA, PIPE FoR \ 10 io WNLPIG Sarin,
CONNECTION BOLTS.
10° 10"
we 4 [PT pa
a fof
12 ve Ir i T (as
io . oo
fi H2 BARS

TROUGH FOR BOLT
REMOVAL AND INSERTION,

SECTION A-A

GENERAL NOTES

ALL CONCRETE SHALL BE CLASS A, C, OR H, UNLESS
OTHERWISE SPECIFIED.

2. ALL REINFORCING STEEL SHALL BE GRADE 60,
UNLESS OTHERWISE SPECIFIED.

3. CHAMFER END EDGES 3/47


—
9”
es

ALTERNATE WIRE MESH REINFORCING

SCHEME FOR

THE LOW-PROFILE PCB

15 3/4"

Welded Wire Fabric
3x12 - 020 x 020
60 ksi minimum yield strength

NOTE: THIS WIRE FABRIC ALTERNATIVE CAN
BE USED IN PLACE OF Vi, V2 AND H1 BARS
THE H2 BARS SPECIFIED ARE STILL REQUIRED

TROUGH FOR BOLT REMOVAL
AND INSERTION

3/4

SS cr 3 3/4" ]
—
—
SECTION A-A
33/4"
| “Th.
| J
LS

SECTION B-B

Ftp az
ry es a,

SIDE ViEW


@

US Department
of Transportanion

Federal Highway
Administration

40C Seventh St Sw
Wasnington, OC 2553C

May 31, 1996

Refer to: HNG-14

Mr. Don L. Ivey

Research Engineer

Safety Division

Texas Transportation Institute
Texas A&M University System
College Station, Texas 77843-3135

Dear Mr. Ivey:

In your May 21 letter to Mr. Gerald L. Eller you requested the
Federal Highway Administration's (FHWA) acceptance of a Low
Profile Barrier as a National Cooperative Highway Research
Program (NCHRP) Report 350 test level 2 (TL-2) temporary work
zone barrier. In support of this request, you also provided one
copy of the Texas Transportation Institute Research Report
990-4F, "Development of a Low Profile Portable Concrete Barrier,"
dated November 1991.

We have noted that the Low Profile Barrier is included in the
recent AASHTO-AGC-ARTBA Report "A Guide to Standardized Highway
Barrier Hardware" as drawing number SWCO3. It is a precast
reinforced concrete barrier 510 mm high with a base width of

660 mm and a top width of 710 mm. Adjacent 6100-mm long segments
are bolted together with two ASTM A36 steel bolts at each end.
These bolts pass through bulkheads at the end of troughs in each
segment end as shown in the enclosed barrier drawings. We
recommend that the 25-mm diameter drainage hole in each trough be
increased to perhaps 75 mm to minimize freezing problems if the
barrier is used in northern climates. This change could require
modifications to the reinforcing details.

Two tests were reported, 9901F-1 and 9901F-2, which correspond to
the NCHRP Report 350 tests 2-11 and 2-10, respectively. A
summary of the test results are enclosed. Vehicle post-crash
trajectories were acceptable and the occupant impact velocities
and subsequent ride-down accelerations were lower than the
preferred NCHRP Report 350 evaluation criteria limits. We
conclude that the low profile barrier, as defined herein, is
acceptable for use as an NCHRP Report 350 TL-2 temporary barrier
on the National Highway System (NHS) where there are few trucks,
the highest impact speeds are expected to be in the 70 km/h
range, and its use is requested by a State agency.


TABLE 1 SUMMARY OF

Test No.
Vehicle Weight, 1b (kg)
Impact Speed, mph (km/hr)
Impact Angle, degrees
Exit Angle, degrees
Displacement, in (cm)
Occupant Impact Velocity
ft/s (m/s)
Longitudinal
Lateral

Occupant Ridedown Acceleration

g's
Longitudinal
Lateral
Vehicle Damage Classification
TAD
coc

CRASH TEST RESULTS

9901F-1
4500(2043)
44.4(71.4)
26.1
0.0
5.0(12.7)

aT
am
on
Ay
Le

-6.0
-11.4

11FLI
1IFLLK1 &
TILDLW1

7

9901F-2
1800(817)
45.7(73.5)
21.3
71.4
0.0(0.0)

are
om
aon
we
3s

11LD3
1IFLEK2 &
11LDEW3


Since the low profile barrier has been patented, it must be
considered a proprietary device. As such, its use on Federal-aid
highway projects, except exempt, non-NHS projects, is subject to
the conditions stated in Title 23, Code of Federal Regulations,
Section 635.411, a copy of which is enclosed.

We are aware that a sloped concrete end section has been used to
terminate the low profile barrier and that this terminal section
has been crash tested to a limited degree. However, since it has
not been tested to the minimum matrix recommended in the NCHRP
Report 350 for any test level, we do not consider it to be a
crashworthly end treatment at the present time. Pending
notification that the appropriate test series has been run with
acceptable results, we recommend that the low profile barrier be
terminated outside the appropriate clear zone or shielded with a
crashworthy device when it is used on the NHS.

Sincerely yours,

Seppo I. Sillan, Acting Chief
Federal-Aid and Design Division

3 Enclosures

Geometric and Safety Design Group Acceptance Letter No. B-36


TROUGH FOR BOLT

4 wo eaee 1" OIA. ORAINAGE MOLE
REMOVAL AND INSERTION J) (wort oes "matOucH 10
ORANACE SLOT).

COnmECTION BOLT HOLE —P\

42 Bars ——t

wows |
b—»— won C85 ¢

ORANACE SLOT 11 3/8" +/-

]
-
it

NOTE: CONCRETE ON BOTTOM HALF OF PLAN EW
1S REMOVED IN ORDER TO SHow DETARS

PLAN VIEW.
(SYMMETRICAL ABOUT CENTER UNES)

11/27 DIA PIPE FOR AD IN MOVING BARRIER.
(LOCATED 6" FROM EACH EXO OF SEGMENT ).

ViBARS SPACED AT
1270. MAXWUM,

ELEVATION

(SYMMETRICAL ABOUT CENTER LINES)