TM 5-5420-278-10
0035 00
0035 00-11
BRIDGE ANCHORAGE (Contd)
OVERHEAD CABLE SYSTEM (Contd)
EXAMPLE
Given the following reconnaissance data,
design a complete long-term anchorage
system for the IRB:
River width: 500 ft (152.5 m)
Current velocity: 6 feet/sec
(1.8 meters/sec)
River bottom is composed of solid
granite (rock).
No reverse current is expected.
SOLUTION
Anchorage system will include:
1. Approach guys: use 1/2-in.
(12.7-mm) manila rope.
2. Upstream system: use overhead
cable system (table 2).
3. Downstream system: use shore
guys attached to every 10th float
(table 3).
Figure 9. Typical Use of Overhead Cable as Upstream Anchorage.
DEADMAN
ANCHOR CABLE
BRIDLE LINES
ANCHOR
TOWER
CURRENT 0–11 FEET/SEC (0–3.4 METERS/SEC)
(NO REVERSE CURRENT)
