ARMY TM 5-5420-212-10-1
MARINE CORPS TM 08676A-10/1-1
TABLE 3-11.
SS Bridges 9 thru 12 Bays
9 Thru 12 Bays
(from below)
Choose a LNCG setting, RB set-up, and packing (if required)
to give N > H
LNCG
RB set-up
Setting
& Packing
(from cols g through I & Note 3)
Dimension N above/below line through ground at RB and 0 when rear BSB is on ground. The RB is set-up on BP
or BP and DU, and LNCG is on setting No. 4, No. 2, or No. 1.
LNCG Settings
No. 4
No. 2
No. 1
Black
Black
Black
BP
BP+DU
BP
BP+DU
BP
BP+DU
Only
O n l y
Only
**
No. of Bays
(g)
(h)
(i)
(j)
(k)
(i)
9
-0.76
0.15
0.61
1.37
1.83
2.59
10
-0.99
-0.38
0.38
0.9
1.60
2.21
11
-1.37
-0.84
0.15
0.71
1.83
2.67
12
-2.13
-1.37
-0.46
0.31
1.07
1.83
NOTES:
1.
An extra 75 mm of clearance can be obtained by lifting the nose to take out the pin sag. Where levels are esti-
mated, this should not be taken into account during the design, but left to compensate for any errors in calculating the
value of H (for bridges 4 through 8 bays).
2.
An extra 0.6 m of clearance can be obtained by lifting the nose to take out the pin sag (for bridges 9 through 12
bays).
3.
Any additional packing under the RB will increase the vertical interval N by three times the thickness of the pack-
ing (e.g., if the packing is 75 mm thick, N will be increased by 225 mm).
4.
The table incorporates an allowance to ensure that the nose clears the LR when it is positioned 230 mm in front
of the F peg.
5.
Height of the roller beam on baseplate only is 0.43 m. Height of the baseplate and deck unit is 0.60 m.
**
Plus 7.62 cm of timber packing between BP and DU.
3-24
Change 2
