INTRO TO BAILEY BRIDGE.pptx

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. PRELUDE 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