ARMY TM 5-5420-212-10-1MARINE CORPS TM 08676A-10/1-1(8)Raise rear of bridge and for single story bridges remove building pedestals. Check placement of landing rollerpedestal to ensure that landing roller is at right angles (900) to nose, and that there is no lateral deflection inlaunching nose.(9)With the panel point of launch over the FRB or CRB, check that the given landing zone (LZ) number or higher isover the center of the LRP rollers (para. 4-4).NOTEA landing zone number higher than the given LZ Is always permitted. Never use an LZ number lowerthan that given for the bridge being constructed.(10) Far bank crew guides launching nose onto roller and will hold in place during the first 10 ft (3 m) of launch.b.Stability of Landing Roller PedestalIn the early stages of launching when vertical load on landing roller is small, the following action must be taken toreduce the risk of instability. In addition to the following, the far bank party should stand on uphill side of landing roller pedestalwhen there is a cross fall, or on the windward side if there is a strong wind, and steady the nose on the roller during the fir st 10ft (3 m) of launch.(1)If the far bank cross fall is greater than the allowable 10% (1 in 10):Action - Level the ground locally or use packingORCommence launch with landing roller pedestal partly lowered, raising it when the bridge has beenlaunched 20 to 30 ft (6 to 9 m).(2)If there is a side load from bridge launched in a cross fall:Action - Set forward roller beam within 3 in (75 mm) of horizontal before nose is lowered onto landing rollerpedestal.4-51
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
