ARMY TM 5-5420-212-10-1MARINE CORPS TM 08676A-10/1-1Section III. COUNTERWEIGHTS - LINK REINFORCED BRIDGESIt is necessary to use counterweights during assembly/de-launch of 2E + 19 thru 2E + 22 bay link reinforcedbridges on normal sites. The following paragraphs describe the counterweights, but do not describe when they are addedor removed. This depends on the size of bridge and type of site.NOTEIt is important to always refer to the build and boom or de-launch table for the bridge being built ordelaunched, to determine when the counterwelghts are added or removed.7-4.2E + 19 BAY - NORMAL SITEOn 2E + 19 bay link reinforced bridges, eight deck units are placed in their final position on the end of bridge as acounterweight.7-5.2E +20 BAY - NORMAL SITEOn 2E + 20 bay link reinforced bridges, twenty deck units and six curbs are placed on the rear end of bridge ascounterweight.Eight deck units are placed in their final position on the end of bridge. Two curbs are placed on the bankseatbeam and four curbs on the top panels to retain the counterweight. The additional twelve deck units are placed ondecking, eight laid flat and four on edge leaning toward deck units as shown.7-6.2E + 21 BAY - NORMAL SITEOn 2E + 21 bay link reinforced bridges, thirty deck units and six curbs are placed on the rear end of bridge ascounterweight. The counterweight is added in two stages.7-38
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