ARMY TM 5-5420-212-10-1
MARINE CORPS TM 08676A-10/1-1
SS Bridges 9 thru 12 Bays
9 Thru 12 Bays
Choose a LNCG setting, RB set-up, and packing (if required)
to give N > H
(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.
O n l y
No. of Bays
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).
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
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).
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.
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.