TM 5-5420-278-100033 000033 00-1BRIDGE ASSEMBLY, SUCCESSIVE BAY METHODWARNINGAll bridge personnel must wear approved life jacketswhile on the bridge. Failure to comply may result ininjury or death to personnel.Exercise caution when walking near centerline ofroadway; the ponton alignment lugs project above theroadway surface on interior bays and constitute atripping hazard. Failure to comply may result in injuryto personnel.NOTEAssembly of a bridge by successive bays is accomplishedby the consecutive addition of bays along bridgecenterline. A ramp bay and interior bays are connectedand anchored at opposite river banks, and additionalinterior bays are connected until distance between themis met. The final connection, completing the bridge, ismade by loosening anchorage at river banks and pullingthe far shore and near shore end spans together using agrip hoist. When the body of water to be spannedcontains obstacles, has rapidly flowing water (over 6 feet/sec (1.8 meters/sec)), or much floating debris, thesuccessive bay method is the most effective. Thismethod of deployment depends on environmentalfactors that are determined in the site layout prior tolaunch.a. Launch all BEBs.b. Launch two interior bays and one ramp bay (WP 0024 00, WP 0025 00,WP 0026 00, or WP 0027 00).c. Secure and connect two interior bays (WP 0029 00 and WP 0032 00).d. Connect ramp bay to interior bay (WP 0030 00 or WP 0031 00).NOTEIn some cases, depending on the far shore conditions, itmay be necessary to deploy two additional interior baysand assemble a five bay raft. This raft can be used totransport two transporters to the far end shore to beused for anchorage.Refer to figure 1, Bridge Assembly by Successive BayMethod, prior to performing steps e and f.e. Anchor far shore end span to temporary anchorage, hold-fast, or naturaldeadman along bridge centerline (CL) (WP 0035 00).NOTEIt may be necessary to leave one BEB connected to helpwith grounding far shore end span.f. Untie BEBs from end span and have them return to launch site.
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