1. The Chairman, National Highways Authority of India, G-5 & G-6,
Sector-10 Dwarka New Delhi-110045.
2. The Director General (Works), Central Public Works Department,
Nirman Bawan New Delhi-110001.
3. The Director General (Border Roads) Seema sadak Bhavan, Ring
Road. Delhi Cantt New Delhi-110010.
4. All Chief Engineers of States / Union Territories / Public Works
Department / Road Construction Department / Highway Departments
(Dealing with National Highways and other Centrally sponsored
schemes)
Subject : Empanelment of manufacturing firms / authorized suppliers of
bearings for bridges on National Highways and other centrally
sponsored schemes
Sir,
Ministry vide circluar No. RW/NH-34057/1/2002-S&R (B) dated
23.06.2005 empanelled some Manufacturers of Elastomeric bearings Pot / Pot
cum-PTFE bearings and Rocker & Roller bearings as Suppliers of bearings.
The validity of the empanelmenats prescribed initially as up to 30.06.2008
which was extended in stages upto 15.05.2009.
2. For renewal of the empanelment of the firms mentioned in the aforestated
Ministry's letter dated 23.06.2005 and empanelment of new firms,
applications were invited by this Ministry from the interested firms hrough its
website and leading newspaper of the country in July - 2008.
The applications and details submitted by various interested firms have
been examined in the Ministry. Accordingly empanelment of the manufacturing
firms / authorized suppliers of bridge bearings for bridges on National Highways
and other roads under
centrally sponsored schemes have been done.The details
of number of firms is as under:-
(i) For Elastomeric bearings -14 firms as per the details
given vide Annexure - l
(ii) For Pot / Pot cum - PTFE bearings -12 firms as per the
details given vide Annexure - ll
(iii) For Rocker & Roller bearings - 8 firms as per the details
vide Annexure - III
4. The empanelment is subject to the following conditions to be strictly
adhered to / followed by the empanelled firms as well as the
Departments / Agencies (user Agencies) procuring the bearings -:
4.1 General
4.1.1 The empanelled firms are required to keep proper record of all documents
pertaining to be procurement of raw materials such as steel, cast / forge
steel, PTFE, neoprene etc.
4.1.2 The empanelled firms shall promptly intimate to the Ministry any supply
made by them to the any User Agency
indicating type and number of the
bearing, location of the bridge, whether new construction or
rehabilitation / repairs existing bridge and the name of User Agency etc.
4.1.3 The empanelled firms are required to have in-house capacity for designing
the bearings based on the data
regarding the forces movementS rotation
etc.supplied by the clients.
4.1. 4 The Engineer-in-charge the Executive agencies : States / UT PWDs,
NHAI, BRO etc. who are concerned with the acceptance of the bearings
shall ensure that all the test for the materials and finished bearings
(randomly selected
as per prescribed procedure) are carried out in their
presence through an independent reputed testing laboratory.
4.1. 5 Strict enforcement of the codal stipulations regarding the process and
acceptance control tests as per IRC-83
(Part-l & Part-ll) and Ministry's
specification for Road and Bridge works (4th revision) shall be ensured by
the empanelled firms as well as the User Agencies while accepting the
supply of bearings. To achieve this objective the user agencies should
ensure that the Engineer-in-charger concerned with the task of acceptance of bearings
is adequately rained so as to make him fully conversant with
the relevant IRC codes and specifications.
4.2 Elastomeric Bearings
4.2.1 Neoprene WRT, Bayprene 110, Sky prene B -5 and Denka S -40 V grade
are to be used as raw elastomer for the manufacture of the elastomeric
bearings and no other chloroprene should be accepted as equivalent of
neoprene
WRT.
4.2,2 The empanelled firms for elastomeric bearings shall either import
chloroprene directly, or will purchase the material
from an authorized
agent of the foreign manufacture A proper record of the quantity of the
materiail
mported / purchased as well as the details regarding the bearings
manufactured year wise shall be maintained by the empanelled firm and
on demand the record will be made available to the user agency (ies) for
inspection All the representatives of the States / Union Territory PWDs
concerned with the acceptance of elastomeric bearings will demand
the above record along with supporting documents from the
empanelled firm chosen for supply, so to ensure that only imported
chloroprene has been used as raw elastomer in the manufacture of
the elastomeric bearings.
4.2.3 It shall be clearly specified in the bid documents that the supplier of
elastomeric bearings shall provide. with their quotations the details of the
break up of quoted rates including the prevailing price of imported raw
elastomer used by them for the manufacture of elastomeric bearings, to
arrive at the quoted rate of the finished bearings per cubic centimeter.
4.2.4 Not with standing the provision of clause 918.3.2 of IRC 83 (part-H), it is
hereby specified that for every lot of less than 24 bearings, an extra
bearing shall be manufactured and, out of the lot, one bearing will be
selected at random for carrying out material tests. This bearing shall be
excluded from the accepted lot for the purpose of payment.
4.2.5 Polymer identification test as per clause 915.1.5 of IRC 83 (part 11)- 1987
is mandatory. The manufacturer shall get the test done through a
recognized laboratory having the facility of Infrared Spectrophotometry
and the spectra shall be comparable to a reference sample of
polychloroprene. The test shall be carried out on the core of the
elastomeric bearings i.e on the material to be obtained by removing the
three layers.
4.2.6 The periodical test for ozone resistance of the elastomer shall be got done
by the supplier in accordance with
clause 915.2.3 of the code IRC83 (part-II). A record of test results for the bearings (for both in house and that of outside agencies) shall be systematically maintained by the Manufacturer
and it-shall be produced to the accepting authority, on demand.
4.3 Pot cum PTFE Bearings
The pot being the most important component of the Pot cum PTFE
bearing, the user agency shall ensure that
proper casting facilities for
castinq of the pot are available with the selected supplier in his casting
unit.
4.4. The following undertaking shall be taken from Suppliers of Elastomeric
and Pot / pot-cum PTFE bearing.
(a) "We undertake to use ------------(Name of Chloroprene)------------ in the
manufacturing of the bearings and that the same shall be imported by us
directly from ------------(name of Manufacturer)-------------- I purchased from-------
(Name of Agent)-------------- who is the authorized Indian agent of
M/s--------------(Name of the Man ufactu rer)-----
(b) "We hereby guarantee against defective materials manufactured,
workmanship as well as certify quality assurance
at every step of
manufacturing of ---------- (Nos.). Elastomeric bearings that may be
supplied by us as per this office and which shall be installed at the --------------------(Name of the Bridge)---------- fora period of 15 years, under normal loading, normal traffic and routine maintenance. We also stand guarantee
for free repair and replacement. (including the cost of placing the new
bearings in position) in part or fuiI. lf any defect is found, in the bearings
or
part there of within the period 36 months from the date of supply or 24
months from the date of installation,
whichever is earlier, except for
defects arising out of theft, pilferage, floods, earthquake or any other
natural
calamity etc. over which we have no control."
(c) "We also give an undertaking that the entire manufacturing and testing
process shall be open to inspection by the agents of the State / UT PWDs / NHAI or their authorized representatives and that all possible help
shall be
extended in conducting the relevant tests required as per IRC: 83
(Part-II)-1987 and other instructions issued by
the Ministry of Road
Transport & Highways from time to time."
5. A report on the performance of bearings supplied, (particularly with
reference to any adverse behaviour like
bulging, flattening, splitting etc. for the
neoprene bearings) may be maintained and sent to the Ministry from time to
time, and a consolidated yearly report to be furnished by 30th April every year.
6. The user agencies are requested to inform the Ministry regularly about the
failure of bearings along with the name
of manufacturers.
7. This empanelment of manufacturing firms I authorized suppliers of
bearings for bridges on National Highways and other centrally sponsored
schemes will be valid up to 22nd July 2012 or until further order of the Ministry,
whichever is earlier.
8. This circular supersedes the previous circular no. RW/NH-34057/1/2008
-S&R (B) dated 17.04.2009. The contents
of this letter may be brought to the
notice of all the officers of your Department dealing with bridge works on
National Highways and other Centrally sponsored schemes.
