ARMY TM 5-5420-212-10-1
MARINE CORPS TM 08676A-10/1-1
t.
Final design
During the preceding design process, the information necessary to fill in the blanks below would have been
obtained. Fill in these figures in the pro-forma, at this point the design is considered complete.
a.
2E +
Bays
b.
LNCG Setting
c.
FRB Setting
d.
RRB Setting
d.
Bearing : NB
FB
e.
Truck/Trailer Loads
f.
Manpower Required
g.
Time to Construct
3-15
DOUBLE STORY 2E + 1 thru 2E + 12 BAY DESIGN ON RESTRICTED SITES
The design procedures for DS bridges (2E + 1 through 2E + 12 bay) on restricted sites is the same as for normal
sites except that:
a.
The length of the launching nose is increased by one or two launching nose heavy (LNH) sections. The
decrease in the amount of R Distance required by increasing nose length can be seen in Table 3-23 below.
b.
During construction, the number of times that the bridge is boomed will be increased, and the distance of
each boom will be decreased.
NOTE
The distance for construction behind the FRB cannot be less than 9.1 m. If a vehicle and push bar
are needed to boom a bridge, add 11.3 m to R Distance given.
TABLE 3-23. Effect of increasing nose length (DS bridges) on R distance
No. of
LNH
R Distance
Length of Bridge: 2E + No. of Bays
Added
1
m
2
m
3
m
4
m
5
m
6
m
7
m
8
m
9
m
10
m
11
m
12
m
0
10.1
11.9
12.2
13.1
14.9
15.8
16.8
17.7
19.5
20.4
21.6
1
9.1
11.0
12.8
14.6
16.5
2
No Advantage
9.1
11.0
12.8
14.6
3-34
