ARMY TM 5-5420-212-10-1
MARINE CORPS TM 08676A-10/1-1
TABLE 3-6 Bridge Selection Tables
SS 4 - 12 Bays
DS 1 - 12 Bays
DS 13 - 22 Bays w/o LRS
DS 13 - 22 Bays w/LRS
AR Gap
No.
AR Gap
No.
AR Gap
No.
AR Gap
No.
of
MLC
of
*
of
MLC
of
m
MLC*
Bays
m
(T)*
Bays
m
MLC
Bays
m
(T)*
Bays
3.7 - 7.1
70(T)
4
6.4 - 9.0
70
1
28.3 - 30.9
50
13
28.3 - 30.9
70
13
5.6 - 9.0
70(T)
5
8.2 - 10.8
70
2
30.2 - 32.8
50
14
30.2 - 32.8
70
14
7.4 - 10.8
40
6
10.0 - 12.6
70
3
32.0 - 34.6
40
15
32.0 - 34.1
70
15
9.2 - 12.6
30
7
11.9 - 14.5
70
4
33.8 - 36.4
40
16
33.8 - 36.4
70
16
11.0 - 14.4
30
8
13.7 - 16.3
70
5
35.6 - 38.2
30
17
35.6 - 38.2
70
17
12.9 - 16.3
24
9
15.5 - 18.1
70
6
37.5 - 40.1
30
18
37.5 - 40.1
70
18
14.7 - 18.1
20
10
17.3 - 19.9
70
7
39.3 - 41.9
24
19
39.3 - 41.9
70
19
16.5 - 19.9
16
11
19.2 - 21.8
70
8
41.1 - 43.7
24
20
41.1 - 43.7
70
20
18.4 - 21.8
16
12
21.0 - 23.6
70
9
43.0 - 45.6
20
21
43.0 - 45.1
70
21
22.8 - 25.4
70
10
44.8 - 47.4
16
22
44.8 - 46.2
70
22
24.7 - 27.3
70
11
26.5 - 29.1
70
12
* See Table 1-1 for transverse slope and crossing restrictions, and MLC 100(W) capability. (T) = Tracked
EXAMPLE: Given a mission to provide an MGB with an MLC and the reconnaissance report gives an AR Gap of 23.8m.
Read down the AR Gap range columns under the different sections (A through D) until a range of gaps is found that will
bracket the AR Gap given. The first range found is 21.Om -23.6m, followed by a second range, 22.8m - 25.4m, which also
brackets the AR Gap. The procedure for determining which range to use will be discussed later. What can be determined
at this point is that a DS 2E+9 or a 2E+ 10 bay bridge will span the AR Gap given, provide a MLC 70 capability, and that
you must go to paragraph 3-14 for further design procedures.
c.
Bridge Selected. Using the bridge selected, go to the appropriate paragraph:
* paragraph 3-12.4 - 12 Bay SS Design.
* paragraph 3-13, 9-12 Bay SS Design on restricted sites.
* paragraph 3-14, 2E+1 - 2E+12 Bay DS Design.
* paragraph 3-15, 2E+1 - 2E+12 Bay Design on restricted sites.
* paragraph 3-16, 2E+13 - 2E+22 Bay DS (w/oLRS) Design.
* paragraph 3-17, 2E+13 - 2E+22 Bay DS (w/LRS) Design.
3-8
RIDGE CONSTRUCTION TIMES
a.
Building times for various bridge lengths are given in Table 1-6. These times are figured from the
downloading of the first pallet load on site to the opening of the bridge for traffic.
3-15
