FM 5-277 PDF
DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited. *This publication supersedes TM , 3 August FM PREFACE. This manual is intended for use by engineer commanders, staff officers, combat engi- neers, and bridge specialists who. M-2 Bailey Bridge (FM ) [Department of the Army] on *FREE* shipping on qualifying offers.
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It was used widely and well by Allied armies in Italy and northwest Europe, They can be pushed or pulled across by a wincn line. The inner truss assembly should follow closely behind the outer truss in order to speed construction. The Bailey bridge was invented by Donald.
Lash cable for center saddle slot to middle of panels and lash outside cable to top part of panels. The left rear soldier calls the lift commands after ensuring that all crew members are prepared to lift to prevent injury. Type 4 provides 71 bridge length, the truss type, and the soil- tons 64 metric tons —base plate, 57 5-277 bearing capacity.
Full text of “Bailey Bridge”
These braces are bolted to total weight of one transverse brace is 88 coupling Figurepage and secure welded plates on each end of the vertical post. These holes can be used to properly space the rocking rollers, as shown in Figure page The launching weight of these bridges is high and slight errors can cause failure.
They are also used to fasten overhead bracing supports to 5-2277 top panel chord. The ribband bolt fastens the ribband to the button stringers and ramps.
Special consideration must be given to the amount of work required to prepare the approaches and piers, since this work frequently takes as much time as the bridge installation itself. Tighten bracing in second bay, and deck second bay Figurepage Enough parts are issued with each of these sets to provide the assembly of a triple-truss pier supporting two triple-truss broken spans and containing both horizontal and vertical stories.
Determine the final bridge length, truss, and grillage type Solution: The number of parts re- quired per bay is given in Tables A-9 and A, Appendix A, for class 30 and class 80 bridges. To avoid congestion, waiting vehicles are directed to park off the road. The upper end of the link rigging, railroad, and construction work.
For bridges over feet It is launching are used as for single-story tables must be followed exactly. Jacks from different manufac- required, with two soldiers operating each turers have different spacing pitch between lever.
Cross bracing must also be welded across the bottom chords. Bearings are placed under orig- inal end span or extra span, depending on bank conditions. Sway bracing is used in all but the first bay at the front of the launching nose. An alternative method is to use a distributing beam on a rocker bearing similar to the support over immediate piers.
Make the following Fit rakers on inner end posts, and tie changes on triple-truss bridges: The approach road often provides such space. A single-story bridge may also be launched as a unit by pushing or pulling it on rollers out over the gap. On one side, holes will lineup Remove any 52-77 material or pro- reel; and slide cable reel support on cable reel with holes in lower chord used for multi- tective covers from packaged cable- shaft.
B A I L E Y B R…
Assembly of the launching nose is the same for all three types of single- story Bailey bridges. The grillage, cribbing, and number of tran- soms per bay must also be checked and the bridge class reduced or upgraded to obtain the required classification. When reeking rollers to the first near-bank f, on the rollers. This permits rakers to be connected between 5-2277 end posts on the inner trusses and the transom.
The distance between these trusses is 1 foot 6 inches. This condition must prevail until the launching nose reaches the roll ers on the fa r bank. For all assemblies over class 70, the deck system must be reinforced by increasing the number of transoms per bay from two to four and by adding a 3-inch 7. Take the following steps: Slide panel in toward center rm bridge. If they With panel-bridge decking, the gap between frames.
At each end is an eye, and a chain with a pin attached. Panels, end posts, transoms, and ramps are a low- alloy, high-tensile steel. Supported on footwalk bearers, f, are laid along the outer sides of the bridge for use by foot troops.
Transoms are normally spaced 5 feet 1. The bank height is measured from the toe of the slope to the ground level at the abutment. For these During launching, the entire weight of the bridges, grillages built from 8- by 8-inch The decking system serves as top lateral bracing.
If end posts are rm 15 trusses under the bridge deck. Use four for all other assemblies. The number of bays and assembly of launching noses is determined as follows: In this respect, the Bailey bridge is often referred to as the “panel” or “truss” bridge.
Insert chord bolts and upper panel pins.