800
800
229
229
B
C
F
G
B
B
229
A
C
D
800
C
D
E
E
H
229
880
C
D
D
E
E
860
860
860
860
LONG.-GUIDE BEARING ASSEMBLY LGB
TRANS.-GUIDE BEARING ASSEMBLY TGB
FREE - BEARING ASSEMBLY FB
FIXED - BEARING TGB
(SCALE 1:7.5)
(SCALE 1:7.5)
(SCALE 1:7.5)
(SCALE 1:7.5)
3
35
20
ELEVATION
85
(SCALE 1:7.5)
70
50
53 34
40
680
PTFE SHEET 5 MM
THICK, DIMPLED OR
MODULAR, PASTED IN
2 MM DEEP RECESS
50
LEGEND
ELEVATION
ELEVATION
STAINLESS STEEL PLATE
40x3x780 WELD 2mm
(SCALE 1:7.5)
DUST SEAL
POLY TETERA FLUORO ETHYLENE (PTFE)
40
SURFACE HARDENED TO
300 BHN MINIMUM
(SCALE 1:7.5)
ELEVATION
(SCALE 1:7.5)
195
NOTE:
550
STAINLESS STEEL PLATE
ELASTOMERIC PAD
35x3x590, WELD 2 MM
880
606
STAINLESS STEEL PLATE
6 MM THICK, WELD 3 MM
ALL ROUND
(NOT TO BE PROVIDED IN
FREE BEARING)
5
SURFACE HARDENED TO
300 BHN MINIMUM
50
380
(SCALE 1:7.5)
600
50
PISTON
VIEW FROM BOTTOM
PART F: TOP PLATE FOR TRANSVERSE GUIDE
VIEW FROM TOP
PART E: POT FOR BEARINGS
(SCALE 1:7.5)
700
50
10
(SCALE 1:7.5)
700
50
800
175
50
700
800
800
ANCHOR BOLT
VIEW FROM BOTTOM
PART G: TOP PLATE FOR
FREE BEARING
(SCALE 1:5)
(SCALE 1:7.5)
175
PISTON
50
DIA.
VIEW FROM BOTTOM
PART H: PISTON FOR FIXED
BEARING
50
DETAIL Y
(SCALE 1:5)
(SCALE 1:5)
AutoCAD FILE NO.: B-10410
The concrete in bed block shall be of min M40 GRADE.
4.
Bearings shall be provided before concreting of deck slab is taken up.
5.
Bearings shall be protected during concreting or providing holding down bolts
operations. Any mortar or foreign material contaminating the bearing shall be
completely removed.
6.
Manufacture & finishing of bearings shall be as per para 927.2 & 927.3 of IRC 83
Part III
7.
Manufacturing tolerances shall be as per para 927.1 of IRC 83 Part III
8.
Acceptance of bearing shall be as per para 928 of IRC 83 Part III.
9.
Material to be used for pot, piston and top plate including all guides, lugs etc shall
be of cast steel to IS 1030:1989 grade 340-570W.
BOTTOM LONG. BEAM
DRAWN BY: M/S Abhinav Associates
DESIGNED BY:
CHECKED BY: V. K. PANDEY (SSE)
VIVEK KUMAR (XEN/NCR/B&S/RDSO)
12. PTFE sheet shall be pure poly tetra fluoro ethylene, and shall be 4.5 mm thick,
having either dimples (hot pressed or moulded) or modules as per IRC 83 Part III.
These shall be pasted in recess 2.5 MM deep in the bearing and the peel strength of
glue to be used shall not be less than 4 N/MM.
16. After the girders are properly leveled/ aligned and bearings tied to the girder using
Class 8.8 bolts, transportation clamps shall be opened and all expansion type
bearing shall be set properly as per ambient temperature. Thereafter holes in
substructure already provided (shall be drilled at this stage if not already provided),
shall be filled with holding down bolts and quickly grouted.
OF SYMMETRY
FIXED BEARING
11. For welding stainless steel sheet, M1 electrode type with stainless steel core wire as
per IRS: M-28-2012 shall be used.
17. Anchor bolts shall be provided in holes (max. dia 40 MM) made in pier top/
pedestals.
LONG. GUIDE BEARING
18. Anchor bolts and nuts shall be hot dip galvanized 100 micron thick, as per IS:
4759.
R.
D.
S.
O.
ROAD OVER BRIDGE
BOW STRING STEEL GIRDER
DIRECTION OF TRAFFIC
54m CLEAR SPAN
56000
TRANS. GUIDE BEARING
FREE BEARING
ARRANGEMENT OF POT PTFE BEARINGS
(SCALE 1:200)
(PAPER SIZE A1)
(SCALE 1:7.5)
CALCULATION REGISTER NO. DD/2014/21
3.
15. All bearings shall be sent by manufacturer duly set. Marked with center line of
bearing along the girder and across it, along with the shipping mark of the bearing
and fitted with transportation clamps. It is prohibited to open transportation clamps
before final assembly of the bearing on the girder without the presence of bearing
manufacturer representative.
R209
DETAIL X
BOTTOM CROSS BEAM
175
32
MIN EMBEDDED LENGTH 330
50
ROUND WASHER FOR 32 DIA. BOLT
ISOMETRIC THREAD
SURFACE ROUGHENED BY
KNURLING TOOL OR CHISELLING
WELD 2 MM ALL ROUND
50
175
175
800
90
175
NUT
OF BOTTOM LONG. BEAM
OF BOTTOM LONG. BEAM
12000
600
600
175
SURFACE HARDENED
TO 300 BHN MINIMUM
175
(SCALE 1:7.5)
CURVE
AFTER 15 MM
ELEVATION
15
419
CURVE
AFTER 40 MM
15
DETAIL Y
40
SURFACE HARDENED TO
300 BHN MINIMUM
40
(SCALE 1:7.5)
50
35
580
VIEW FROM BOTTOM
PART B: PISTON FOR
FREE/SLIDING BEARINGS
R209
88
3
50
600
The design is in accordance with IRC- 83 (PART-III)-2002.
14. All non-working surfaces shall be given protective coating comprising of 2 coats
of epoxy primer enriched with metallic zinc, one intermediate coat of high build
epoxy paint reinforced with mio (micaceous iron oxide) & one coat of high
performance epoxy finish paint as per para 39.2.2 of IRS B1.
R5
3
2.
13. Material to be used for wiper seal and dust seal shall be of microcellular
polychloroprene rubber or polythene foam & it's adhesion to metal shall be with
polychloroprene rubber based adhesive dunlop S-758, dendrite PC-65 or any other
equivalent brands.
(SCALE 1:7.5)
419
ELEVATION
50
800
(SCALE 1:7.5)
50
700
420
VIEW FROM TOP
PART D: ELASTOMER
PAD FOR BEARINGS
800
700
All dimensions are in MM.
10. All the flame cut, sawn or planed edges of the plates should be machined. All
sheared corners shall be rounded off with 2 MM radius.
50
3
50
5
VIEW FROM BOTTOM
PART A: TOP PLATE FOR LONG. GUIDE
50
34 53
195
5
STAINLESS STEEL PLATE
33x3x790 WELD 2 mm
1.
195
DETAIL Y
5
5
500
ELEVATION
36
10
419
175
420
40
45
175
10
HIGH STRENGTH BOLT
195
DUST SEAL 10x15 ALLROUND
PISTON WALL
(SCALE 1:7.5)
800
650
4
175
(SCALE 1:7.5)
420
STAINLESS STEEL PLATE
6 MM THK, WELD 3 MM
ALL ROUND
SURFACE HARDENED TO
300 BHN MINIMUM
VIEW FROM TOP
PART C: BRASS RINGS
FOR RETAINING
ELASTOMER IN POT
VIEW FROM TOP
PISTON BASE
175
420
600
53 34
380
500
3
SYMBOL
HARDENED SURFACE 300 BHN MINIMUM
(SCALE 1:7.5)
860
5
10
50
50
606
50
880
53
420
30
(SCALE 1:7.5)
STAINLESS STEEL
PLATE 35x3x590,
WELD 2 MM
590
600
ELEVATION
60
10
STAINLESS STEEL PLATE
40x3x690, WELD 2mm
53
34 53
800
DETAIL X
700
50
50
85
10
3
35
380
5
53
880
780
419
STAINLESS STEEL PLATE
6 MM THICK, WELD 3mm
2+2
X-SECTIONAL VIEW ACROSS LONGITUDINAL AXIS OF GIRDER (CENTER LINE OF THE GIRDER COINCIDES WITH CENTER LINE OF BEARING SHOWN)
SCRUTINIZED & CHECKED BY:
SRIJAN TRIPATHI (DBS /SB-I)
APPROVED BY:
A. K. DADARYA (EDBS)
DETAILS OF PTFE POT BEARING
PROVISIONAL
RDSO/B - 10410/9
"THIS DRAWING IS THE PROPERTY OF RESEARCH DESIGN AND STANDARD ORGANIZATION ( MINISTRY
OF RAILWAY ), LUCKNOW-226011, INDIA, AND SHALL NOT BE USED, COPIED OR REPRODUCED IN PART
OR WHOLE, WITHOUT PRIOR CONSENT IN WRITING."