baily bridge introduction made by self

1. INTRO TO BAILEY BRIDGE

2. • ME VOL - PART III.
• ERPB - SEC 40.
REFERENCES

3. Without doubt the supply of Bailey bridge did
much to shorten the course of World War II, a
view expressed by Montgomery who wrote in
1947:
'Bailey Bridging made an immense contribution towards
ending World War II. As far as my own operations were
concerned, with the eighth Army in Italy and with the 21
Army Group in North West Europe, I could never have
maintained the speed and tempo of forward movement
without large supplies of Bailey Bridging'

4. • TO ACQUAINT THE CLASS WITH
THE VARIOUS PARTS OF BAILEY
BRIDGE
AIM

5. PH 1. GENERAL DESCRIPTION.
PH 2. CHARACTERISTICS.
PH 3. INTRODUCTION TO PARTS.
PREVIEW

6. •Sir Donald Bailey was a civil servant
in the British War Office who
tinkered with model bridges as a
hobby. He presented one such model
to his chiefs, who saw some merit in
the design and then construction
started at a slow rate.
• Sir Donald Bailey designed the Bailey bridge in 1940, specifically to
meet a requirement for a 40-ton capacity bridge. In July 1941
production of the Bailey bridge began, by December 1941 the Bailey
Bridge was with the troops.
•A number of bridges were available by 1944 for D-Day, when
production was ramped up. The US also licensed the design and
started rapid construction for their own use. Bailey was later
knighted for his invention, which continues to be widely produced
and used today.

7. GEN DESCRIPTION
1.SIR DONALD BAILEY ; 1940.
2.QUICK ASSY ; SIMPLE ERECTION.
3.CONSTR SQUENCE.
RECCE AND SETTING OUT.
ROLLER LAYOUT.
CONSTR ON HOME BANK WITH NOSE.
ROLLED OVER TO FAR BANK.
NOSE REMOVED.
JACKED DOWN.
DECKING AND MARKING.

8. ---CONTD
4.ROLLERS.
CONSTR ROLLERS- PLAIN ROLLERS.
LAUNCHING ROLLERS- RR.
5.RESTD SITES
GANTRY.
ROLLING CWT.
SWINGING BAILEY.
6.THROUGH TYPE

9. ---CONTD
7. ONE BAY-10 FT
• PANELS- 2 TO 6 TO 12 TO 18.
• TRANSOMS- 2 OR 4.
• STRINGERS- 5 OR 7.
• CHESSES - 13.
• RIBAND - 2.
• TRANSOM CLAMPS, SWAY BRACES, TIE PLATES, BRACING
FRAMES.
8. GIRDER VS TRUSS.
9. NAMING A BB. ‘X Y’
X- NO OF TRUSSES.
Y- NO OF STOREYS.
EG - SS,DS,TS,DD,TD,DT,TT.

10. ---CONTD
10. LOAD CL.
9,12,18,24,30,40T/W,50T/W,60 T/W,70T/W
DDR, TDR.
11. TYPES. BB, BSB , BPB , BP RAFTS, HYBRID-BROKEN /
CONTINOUS, PIERS.
12. LEADING DIMENSIONS
• C/C INNER TRUSS- 12’ 11”.
• IN TO IN INNER TRUSS - 12’ 4”.
• C/C INNER AND MIDDLE- 18”.
• C/C MIDDLE TO OUTER- 8.5 “.
• RD WAY BETWEEN RIBANDS-10’ 9”.
• BOTTOM OF BASE PLATE TO TOP OF DECK- 28 “.

11. • Single/Single (S/S)
• Double/Single (D/S)
• Triple /Single (T/S)
• Double/Double (D/D)
• Double /Triple (D/T)
• Triple/Double (T/D)
• Triple/Triple (T/T)
S S
Truss Storey
TYPES OF CONSTR

12. ANY QUESTIONS ?

13. CHARACTERISTICS
• Readymade.
• Easy transportation.
• Easy to construct and dismantle.
• No highly skilled labour.
• Man handling.
• Flexible.
• Easy to repair.

14. BAILEY BRIDGE PARTS
1.MAIN BRIDGE AND DECKING MEMBERS.
2.BRACING MEMBERS.
3.END OF BRIDGE MEMBERS.
4.FOOT WALK MEMBERS.
5.ERECTION TOOLS.

15. MAIN BR AND
DECKING MEMBERS

16. MAIN BRIDGE AND DECKING MEMBERS.
1.PANEL.
• SIZE 10 FT X 4 FT 9 INS PIN HOLE TO PIN HOLE
• OVERALL HEIGHT 5 FT 1"
• WEIGHT 570 LBS
• 6 MAN LOAD
• CHORDS- 4”X2” CHANNELS
• VERTICAL AND DIAGONAL 3”X1 ½” I CHANNEL SEC
• DIAGONALS AND VERTICALS - LOAD TFR PTS

17. PANEL
10’
5’1”
WT- 258.6 KG
MEN CARRY :- 6

18. PANEL
FEMALE END
MALE END

19. ..Contd
2.PANEL PIN.
• WEIGHT 6 LBS
• 1 7/8 INS DIA ; 8 ¼ INS LONG
• CUT IN THE PANEL PIN- PARALLEL TO THE GRND
3. TRANSOM.
• WEIGHT 445 LBS
• SIX MAN’S LOAD
• SIZE 18 FT X 10 INS X 41/2 INS
• CLEATS 5 IN NOS FOR THE SEATING OF THE STRINGERS
• HAS TWO SQUARE LUGS FOR THE RAKERS
• TWO LUGS FOR FOOT WALK BEARER
• BOTTOM FLANGE -HOLES FOR SEATING ON THE PANEL DOWELS

20. PANEL PIN
WT- 2.7 KG

21. PANEL PIN
PANEL PIN

22. TRANSOM
18’
10”
WT- 202 KG
MEN CARRY :- 6
RAKER LUG
STRINGER LUG

23. TRANSOM

24. ….CONTD
4. STRINGERS PLAIN AND BUTTON.
> PLAIN 183 LBS AND BUTTON 190 LBS
> CARRIED BY 2 MEN
> BUTTON STRINGER - 12 BUTTONS
> CAN TAKE 13 CHESSES
> CONSTRUCTED OUT OF 4”X1 1/3” RSJ
> SIZE 9’ 11 5/8” X 18 ¾” INS X 4”
> EACH BAY THREE PLAIN AND TWO BUTTON
STRINGERS
> IN EWBB IT HAS FIVE PLAIN AND TWO BUTTON
STRINGERS PER BAY

25. PLAIN STRINGER
9’ 11 5/8”
1’ 8 3/4”
4”
WT- 83 KG
MEN CARRY :- 2

26. PLAIN STRINGER

27. BUTTON STRINGER
9’ 11 5/8”
1’ 8 3/4”
4”
WT- 86 KG
MEN CARRY :- 2

28. BUTTON STRINGER

29. …CONTD
5.CHESSES.
• TIMBER ; SIZE 11 FT 11 INS X 63/4 INS X 2 INS
• CARRIED BY ONE MAN
• EACH BAY HAS 13 CHESSES
• STEEL CHESSES BEING DEVP
6. RIBAND.
• TIMBER ; SIZE 9 FT 11 ½ INS X 6 INS X 6 1/16 INS
• PAINTED BLACK AND WHITE
• KEEPS THE CHESSES HELD TO THE STRINGERS
• INDICATES THE END OF THE ROADWAY.

30. CHESSES
11’11”
8 3/4”
WT- 25.4 KG
MEN CARRY :- 1

31. CHESSES

32. RIBAND
9’ 11 ½”
RIBAND BOLT HOLES
WT- 34 KG
MEN CARRY :- 1

33. RIBAND

34. RIBAND BOLT
8 7/8”
WT- 0.68 KG

35. BRACING MEMBERS

36. BRACING MEMBERS
1.RAKER.
• SIZE 3 FT 5 31/32 INS X 3 INS X 1 ½ INS.
• WEIGHT 18 LBS.
• USED TO BRACE THE TRANSOM TO THE GIRDER / PANELS.
TWO PER TRANSOM .
2. TIE PLATE.
• SIZE 10 INS X 2 ½ INS X 3/8 INS
• HOLE TO HOLE 8 ½ INS
• WEIGHTS 3 LBS.
• USED TO BRACE THE MIDDLE AND OUTER TRUSSES IN A
TRIPLE TRUSS BR .

37. RAKER
3’ 6”
WT- 8.2 KG

38. RAKER

39. BRACING BOLT
WT- 0.45 KG

40. BRACING BOLT

41. TIE PLATE
8½”
2½”
WT - 1.4 KG

42. ….CONTD
3.BRACING FRAME.
• 4 FT 1 INS X 1 FT 6 INS HOLE TO HOLE
• WEIGHT- 40 LBS
• USED TO BRACE INNER AND MIDDLE TRUSS IN A
DOUBLE AND TRIPLE TRUSS BR.
4. OVERHEAD BRACING SUPPORT.
• 2 FT X 2 FT IN X 1 FT 6 INS
• WEIGHT 150 LBS
• 2 PER BAY
• PREVENTS SPLAYING OF GIRDERS FROM TOP

43. BRACING FRAME
4’1”
1’6”
WT - 18 KG

44. BRACING FRAME

45. OVERHEAD BRACING SUPPORT
WT – 86.2 KG
MEN CARRY: 2

46. CONTD
5.SWAY BRACE.
• SHORT AND LONG ARMS
• WEIGHT 65 LBS.
• LONG ARM TOWARDS FAR BANK
• THE GAUGE PROVIDED ON SMALLER ARM.
6. TRANSOM CLAMPS.
• ARTICULATED FASTENINGS
• NOT DESIGNED TO TAKE UPWARD LOADS.
• WEIGHT 6 LBS
• NEVER JACK UP BELOW TRANSOM WITH TRANSOM CLAMP.
7. BRACING BOLT. USED TO ATTACH, RAKER, BRACING FRAME AND TIE
PLATE AND WEIGHS 1 LBS.

47. SWAY BRACE
WT – 29.5 KG
MEN CARRY: 1
TOTAL LENGTH: 15’ 1 1/8”
LONG ARM
SHORT ARM
SLIDING BLOCK GAUGE
LOCK NUT

48. SWAY BRACES

49. TRANSOM CLAMP
WT – 2.7 KG

50. TRANSOM CLAMPS

51. END OF BR MEMBERS

52. END OF BRIDGE MEMBERS
1. RAMP PLAIN AND BUTTON
• 9 FT 11 5/8 INS X 2 FT 10 INS X 5 INS.
• BUTTON RAMP HAS 12 BUTTONS.
• PLAIN WEIGHT 360 LBS; BUTTON WEIGHT 370 LBS
• RAMP GIVES A SLOPE OF 1 / 10.
2. RAMP PEDESTALS
• 2 FT 3 INS X 1 FT 6 INS X 1 FT 7/6 INS
• FOUR USED FOR A TRANSOM.
• REQD FOR THE MORE THAN CL 40 BRS- SLOPE OF 1 / 20.

53. PLAIN / BUTTON RAMP
PLAIN
WT: 163.3
MEN CARRY: 4
BUTTON
WT: 167.8
MEN CARRY: 4

54. RAMP PEDESTAL
WT: 43.1
MEN CARRY: 2

55. CONTD
3. END POSTS
• PIN HOLE TO PIN HOLE 4 FT 9 INS.
• TWO TYPES, MALE AND FEMALE.
• STEP ON MALE END POST CAN TAKE 15 TONS AND FEMALE 12 TONS
BUT BY INSERTING A TRANSOM IT WILL TAKE 15 TONS. BOTH MALE
AND FEMALE WEIGHS 130 LBS.
4. BEARING – 1 FT 6 INS X 1 FT 3 INS X 3 7/8” INS; WEIGHS 70 LBS.
5. BASE PLATE
• BEARING CAN MOVE 9 INS IN BASE PLATE.
• AREA 13 SQ FT.
• SIZE 4 FT 7 INS X 2 FT 11 3/8 INS, 2 INS WELL.
• WEIGHS 400 LBS ; 4 MAN CARRY .

56. END POST
WT: 59 KG
MEN CARRY: 2
4’9”

57. END POST

58. BEARING
WT: 31.7 KG
MAN CARRY: 1

59. BEARING

60. BASE PLATE
4’7”
2’11”
4”
WT: 181 KG
MEN CARRY: 4

61. BASE PLATE

62. FOOTWALK MEMBERS

63. FOOTWALK MEMBERS
1.FOOTWALKS.
• 2 FT 6 INS TRACKWAY
• LENGTH 9 FT 11 ½ INS.
• WEIGHS 98 LBS.
2.FOOTWALK BEARER. FITTED TO TRANSOM
AT EVERY 5 FT ; WEIGHS 20 LBS.
3.FOOTWALK POSTS. LENGTH 4’01/2”.

64. FOOT WALK BEARER
WT: 9.1 KG
MEN CARRY: 2

65. FOOT WALK POST
WT: 3.2 KG

66. LAUNCHING
EQUIPMENTS

67. LAUNCHING EQUIPMENT
1. ROCKING ROLLERS.
• 3 FT 10 INS LONG ; 9 2/3 INS HIGH.
• HT ON BEARING AND TEMPLATE IS 16 ½ INS
• 3 ROLLERS
• MAX LOAD 21 TONS ( STR OF THE RR )
• FOR SINGLE STOREY BRIDGES 15 TONS
2. PLAIN ROLLERS.
• HEIGHT ON TEMPLATE 8 INS
• CAN TAKE 6 TONS .

68. ROCKING ROLLER
WT: 91.6 KG
MEN CARRY: 2

69. PLAIN ROLLER
WT: 47.6 KG
MAN CARRY: 1

70. ...CONTD
3. TEMPLATES.
• TWO TYPES – FOR ROCKING ROLLER AND PLAIN ROLLER.
• ROCKING ROLLER TEMPLATE – 4’3/8” X 2’ – 1” WELL, WEIGHS 100 LBS.
• PLAIN ROLLER TEMPLATE - 2’10 7/8” X 1’6” – 1 IN WELL – WEIGHS 20 LBS.
4. LINKS LAUNCHING NOSE MK I AND MK II. -
• MK II IS STRONGER THAN MK I;HAS A DOWEL.
• CAN BE USED ON BOTTOM OR TOP CHORD
• LIFT BY 13 ½ INS IF FIXED AFTER ONE BAY
• FITTED TO A MAX OF 4 BAYS BEHIND.
• TWO PAIRS CAN BE USED AT A TIME .
• MAX LIFT 7 FT 10 ½ INS.
• MK I WEIGHS 12 LBS AND MK II 28 LBS.
• MK II IS USED IN THE HYBRID BRS .

71. ROCKING ROLLER
TEMPLATE
WT: 45.4 KG
MAN CARRY: 1

72. PLAIN ROLLER
TEMPLATE
WT: 13.6 KG
MAN CARRY: 1

73. LAUNCHING LINK MK-I
WT: 5.4 KG

74. ERECTION TOOLS

75. ERECTION TOOLS
1.PANEL LEVER USED TO FIT THE PANELS INTO THE THIRD
/ OUTER TRUSS. HAS TWO POSNS TO FIT .
2. DAVIT. TRIPLE CORDAGE TACKLE ;USED TO ADD / LIFT
THE PANELS TO THE HIGHER STOREYS.
3. CHORD JACK. THREE TYPES – MK I, II AND III. USED TO
TAKE OUT THE SAG IN THE GIRDER TO FACILITATE THE
INSERTION OF PIN IN THE UPPER STOREYS.
4. PIN EXTRACTOR REQUIRED FOR EXTRACTING PINS
FROM THE OUTER TRUSS .

76. PANEL LEVER
WT: 20.4 KG
MAN CARRY: 1

77. CHORD JACK
WT: 45 KG
MEN CARRY: 2

78. PIN EXTRACTOR
WT: 6.8 KG

79. …CONTD
5.JACKS. 15 TONS ON HEAD AND 7.5 TONS ON
TOE .
6.HAMMERS, HIDE FACE.DEADENS THE NOISE.
7.SPANNERS. SINGLE ENDED ¾ INS, PODGER,
CRACKED BOX SPANNER ¾ INS, SINGLE ENDED, 1
¼ INS PODGER AND RATCHET SPANNER 1 ¼ INS.
8.CARRYING BARS. USED TO CARRY PANELS,
TRANSOMS AND BASEPLATES.

80. BAILEY
JACK
WT: 50.8 KG
MEN CARRY: 2

81. CARRYING BAR
WT: 1.8 KG

82. SPANNERS

83. HAMMER HIDE FACED

84. CONCLUSION