TM 5-5420-278-100019 000019 00-5SITE REQUIREMENTS AND LAYOUTS (Contd)(3) The site should be located at a narrow point along the river that is freeof obstructions that would impede operations. (4) The site should have firm banks on both sides with slopes, water depth,and current velocity within the specified limits for the IRB launchmethod used. (Refer to WP 0019, table 1, Launch Restrictions.)(5) The bridge length and type of construction method will determine thesize and number of assembly sites required. (Refer to WP 0033, BridgeAssembly Successive Method, and WP 0034, Bridge Assembly SwingingBridge Method.)CAUTIONThe following vehicles have known bank heightlimitations. Bank preparation prior to trafficking thesevehicles may be required.Heavy Equipment Transporter (HET) M1070 andM1000: Bank heights should not exceed 24 in. (0.6 m).This is limited by the tractor-trailer combination beinglimited to break-over/break-under angles of 15%. Severedamage can occur to the trailer if trafficking with bankheights higher than 24 in. (0.6 m) is attempted.Abrams (M1) with Mine Clearing Blade (MCB): Bankheights should not exceed 18 in. (0.46 m). This islimited by clearance of the MCB with the bridge andramp deck. Severe damage can occur to the bridge orramp deck if trafficking with bank heights higher than18 in. (0.46 m) is attempted.Armor Vehicle Launched Bridge (AVLB): Bank heightsshould not exceed 46 in. (1.16 m). This is limited byclearance of the AVLB’s bridge outrigger with thebridge and ramp deck. Severe damage can occur to thebridge or ramp deck if trafficking with bank heightshigher than 46 in. (1.16 m) is attempted.Other vehicles with low far overhangs or terrainlimitations should be closely monitored andadjustments made to bank heights as necessary.Attempting to cross any vehicle above the recommendedbank height or 79 in. (2 m), whichever is less, mayresult in damage to the bridge or ramp deck or thecrossing vehicle itself.(6) The site should have a firm, stable bank with a slope of 11 degrees orless, a water depth of at least 48 in. (102 cm), and a current velocity of10 ft (3 m) per second or less to launch BEBs.3. Launch Condition Requirements. River bank and water conditions areused to determine the launch method best suited for the crossing site. Thereare four recommended launch methods for the IRB: the free launch, controlledlaunch, high-bank launch, and deployment by helicopter. Site requirements foreach method are listed below.
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
