Different bridge lengths are created by varying the number of bays used to suit the gap being crossed. A fully erected Medium Girder Bridge crosses its first traffic over the Kazer River, Mosul, Iraq, 2003. The MGB is rapidly-deployable, adaptable and cost-effective. The segments have knuckle joints at each end; assembly consists of simply engaging the knuckle joints of adjacent segments then inserting a pin through a hole down the length of the knuckle. Handrail components can be carried on an MGB palletor unit transport. *FREE* shipping on qualifying offers. A series of wedges are used to create a distinctive hump which limits deflection when carrying heavy vehicles. The economy and efficiency of steel girder systems are significantly impacted by the ease of fabrication, erection, construction, and as well as in-service behavior. The MGB parts are fabricated from a specially developed zinc, magnesium, and aluminium alloy (DGFVE 232A). Most parts can be handled easily by four soldiers. (U.S. Marine Corps photo by Cpl. MACH MGB (Mechanically Aided Construction by Hand) is a semi-mechanized bridge building system, which reduces the size of construction crews from 25 to 9, for similar build times. MACH MGB is field proven and used worldwide. WFEL - Rapidly Installed Military Bridges. Media in category "Medium Girder Bridge" The following 69 files are in this category, out of 69 total. The Medium Girder Bridge is a classic piece of engineering. All segments are man portable. A 16-Bay with LRS Medium Girder Bridge across the Kazer River, Mosul, Iraq, 2003. 10.1-A6-3 Bridge Mounted Sign Bracket Details 1 of 3 (pdf 116 kb) (dwg 123 kb) 10.1-A6-4 Bridge Mounted Sign Bracket Details 2 of 3 (pdf 109 kb) 10.1-A6-4b Bridge Mounted Sign Bracket Details 2 of 3 10.1-A6-4c Bridge Mounted Sign Bracket Details 2 of 3 The WFEL Medium Girder Bridge (MGB) is a classic example of high-quality precision military engineering that has stood the test of time. In the double storey MGB bridge, the girders consist of top and bottom panels, with junction panels and end taper panels forming the sloping end of the bridge. The LRS deepens the girder and transfers the load throughout the length of the bridge. Capsil Roller Beam of the Medium Girder Bridge. MEDIUM GIRDER BRIDGE SYSTEM CONSISTING OF BRIDGE SET (NSN 5420-00-172-3520) BRIDGE ERECTION SET (NSN 5420-00-172-3519) LINK REINFORCEMENT SET (NSN 5420-01-139-1503) * This manual supersedes TM 55420-212-20P dated 1 April 1987, Including all changes. Bracing with the additional lower deck dramatically strengthens the bridge allowing heavier loads and longer spans. MGB units are light, easily transported and can be adapted for most tactical bridging requirements. Two such longitudinal girders are constructed parallel to each other to provide the bridge's strength. The MGB Pontoon is fabricated from marine grade aluminum alloy. Powered pontoons are driven by a 75 hp (56 kW) diesel engine with a water jet propulsion unit. DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. The two span bridge can have an overall length of up to 51.5 metres (169 ft), while the three span can be 76 metres (250 ft). The bridge can still be built by hand if the crane or hydraulics are incapacitated. Box girders comprise structural steel, pre-stressed concrete, reinforced concrete or composite of steel. The 20 Seabees partnered with 32 Marines for the week-long exercise to construct a five-bay Improved Ribbon Bridge (IRB) and an eight-bay double story and six-bay single story Medium Girder Bridge (MGB) to demonstrate NMCB capabilities and improve interoperability with their Marine counterparts. The primary components of the MGB system are rectangular "top deck" segments, and triangular bracing "bottom deck" segments. The MGB is a two-girder deck bridge in which the wide upper surface of the girders and the deck units laid between them form a 4.0 metre-wide roadway. Please improve this article by adding a reference. Short/low load bridges can be constructed using just top deck components. Single spans can reach 48 metres. From 100m to 300m spans, truss or arch bridges become most economic, although segmental concrete types are still common. An ‘overbridge’ is a method of reinforcing an existing bridge that might have been damaged or simply not have the required carrying capacity, covering craters or reinforcing culverts for example. The MGB is constantly in use, and increasingly in demand, for both military and disaster relief operations. The MGB meets the evolving needs for bridging equipment across a wide spectrum of requirements, from short irrigation channels, through ravines to large expanses of water. The length of these bridges is limited only by the amount of equipment available. Two pontoons are coupled back to back to create each pontoon pier. Savona Equipment will buy, sell and consign your new or used steel bridges. The ends of the roller beams are supported on base plates and each can be adjusted in height. This prohibits the heavier vehicles in use by the military from crossing. Bailey bridge for another bridge type with mobile military application. The advantages of MACH MGB over other purpose-built mechanized systems are: The MGB handrail is designed to provide a significant increase in awareness of roadway width for both military and civilian drivers. Floating MGBs can be constructed in single or double storey configurations using the same components as the dry bridge configurations: Single and double storey Floating MGBs can be built using standard MGB superstructures, carried on MGB Pontoons with single storey hinge bays or double storey Span Junction Sets to provide articulation. This creates a fully reinforced structure. In operation since 1971, when it set new standards for military bridging, today over 500 Medium Girder Bridge (MGB) systems have been purchased by armed forces worldwide, notably the UK, USA and other NATO allies. For information about how to add references, see Template:Citation. For information about how to add references, see, Articles incorporating text from Wikipedia, https://military.wikia.org/wiki/Medium_Girder_Bridge?oldid=4178805. It was designed for SLS printing,- made of Nylon/Polyamide - Girder Bridge Parts 1-8 3D printable - 3D model by kaadesign (@kaadesign) [09bf953] This is a good example from US forces in Afghanistan of the MGB being used a… Major Parts. Aerial view of the erection site of a Medium Girder Bridge over the Kazer River, Mosul, Iraq, 2003. This type of construction requires a building party of 34 soldiers, and is built on three roller beams. This is achieved by preassembling MGB components into modules in a separate assembly area or moving them as whole modules of beams and lower panels plus a special junction module to the bridge site . In UK service, the modern form of the MGB is the medium Girder Overbridge, or MGOB. Disadvantages of the MGB/LRS. Longer bridges are only able to carry lighter loads. The MGB launching nose suspended over the gap. The MGB system includes piers, pontoons and ferries, all engineered for deployment with minimum manpower. Used as an extenstion to the construction frame to roll the bridge out over the gap. Box Girder Bridge is a bridge where the key beams consist of girders shaped like a hollow box. Generally, short bridges (less than 100m span) are achievable via a concrete or steel beam construction. The Link Reinforcement Set (LRS) is constructed when a long, high class type of bridge is required. The Medium Girder Bridge is modular, lightweight, and can be assembled in a short period of time. 16 Bay With Link 4.jpg 1,184 × 589; 287 KB In addition, it is also a deck type, two-girder bridging system capable of carrying loads up to and including Main battle tanks (MBT). 775 Views 2 Comment. The Medium Girder Bridge (MGB) is a lightweight, man portable bridge and can be assembled without help from heavy equipment. Component Lists. Kazer River, Mosul, Iraq, 2003. Each bay is 1.83 metres (6ft) in length; a step change in gap crossing capability being achieved as each bay's configuration is changed from Single Storey to Double Storey and then to Double Storey with a link reinforcement. Double storey construction allows landing bay spans up to 26.5 metres (86 ft 11 in) and is suitable for conditions where there is considerable rise and fall in water levels. Cable-stayed bridges are optimal for spans from about 250m to 750m. These are included in our issued set of Prestressed Concrete I-Girder standards.See MISCELLANEOUS STANDARDS section in the list for all additional standard drawings required. These may include any combination of existing supports, pontoons, existing or improvised piers and the MGB Portable Pier. Off-System 24-Ft Rdwy Bridge Standards Available for download Prestressed I-Girder standards are available for structures with Type Tx28 thru Tx62 girders. Decisions on the basic geometry of the girders (I-girders and Tub Girders) as well as the bracing details play a major role in the efficiency of the system. The normal building party for double-storey bridges is 25 soldiers. All except three parts weigh under 200 kg. Aerial view of the nearly complete erection of a Medium Girder Bridge over the Kazer River, Mosul, Iraq, 2003. Short/low load bridges can be constructed using just top deck components. Single-storey bridges can be constructed by 9 to 17 soldiers. It is constructed on one roller beam for single-story construction; two roller beams, 4.6 m apart, for double-story construction; and on three roller beams when constructing a double-story bridge over 12 bays long. 3 Like. medium-girder-bridge. Army DA administrative publications and forms by the Army Publishing Directorate APD. Kazer River, Mosul, Iraq, 2003. Kazer River, Mosul, Iraq, 2003. Depending on the span required, several different types of bridges are in common use today. Girder bridge systems are highly transportable, can be rapidly deployed and are considered cost effective. Advantages of the MGB/LRS. MGB Double Storey multi-span bridges usually take the form of two or three span structures rated at MLC 70. Speed of … The bridge is then constructed using a suitable crane or CALM vehicle. In addition, it is also a deck type, two-girder bridging system capable of carrying loads up to and including Main battle tanks (MBT). Medium Girder Bridge on Amazon.com. The components can be easily transported by bridging trucks, trailers, or by helicopter. The MGB Link Reinforcement Set (LRS) consists of reinforcing links which are 3.66 metres (12 ft) long, plus short links of 1.82 metres (6 ft), which are pinned together to form chains under each girder. In operation since 1971, when it set new standards for military bridging, today over 500 Medium Girder Bridge (MGB) systems have been purchased by armed forces worldwide, notably the UK, USA and other NATO allies. For medium span highway bridges, composite box girders offer an attractive form of construction. The latest technologies high quality electronic pubs and … Preface. The MGB also requires very little maintenance once erected, is air transportable in either standard palletised loads or in partially assembled bridge configurations, and all US components will fit MGBs in use by allies (except for the launching nose cross girder posts). Bracing with the additional lower deck dramatically strengthens the bridge allowing heavier loads and longer spans. English: The Medium Girder Bridge (MGB) is a lightweight, man portable bridge and can be assembled without help from heavy equipment. No results. Although using an LRS provides a longer bridge span, it lowers the Military Load Class from 70 to 60. In operation since 1971, over 500 MGB systems have been acquired by 40 armed forces worldwide. MGB was originally sold to the British Army in 1971, subsequently also being sold to many other nations, including the Dutch, Swiss and US Militaries. In addition, it is also a deck type, two-girder bridging system capable of carrying loads up to and including main battle tanks. Transoms rest on the lower chord of the panels, and clamps hold them together. Single Storey to 9.8m, Double Storey to 31.1m, Double Storey with Link Reinforcement to 49.4m - all at MLC 70, Double Storey with Link Reinforcement (LRS). The Medium Girder Bridge (MGB) is a lightweight, man portable bridge and can be assembled without help from heavy equipment. Allocation/Capabilities. Single-span bridges are launched using a centrally mounted launching nose. Adam Dublinske) Medium-girder-bridge 3D models ready to view, buy, and download for free. MGB was originally produced by Fairey Engineering Ltd., in Stockport England and is still made to this day by its successor WFEL based on a design by MVEE in Christchurch. MACH MGB uses standard MGB components supplemented by special components designed to assist mechanical handling. In some cases we can also arrange removal of the bridge. Girder Bridge Parts 1-8 3D printable. Please improve this article by adding a reference. A single storey MGB bridge is constructed using top panels pinned together to form two girders and joined at each end by a bankseat beam, creating a rigid framework. 823 medium girder bridge products are offered for sale by suppliers on Alibaba.com A wide variety of medium girder bridge options are available to you, There are 24 suppliers who sells medium girder bridge on Alibaba.com, mainly located in Asia. Fully laden pontoons can operate in currents up to 2.5 m/s (4.9 knots). This article does not contain any citations or references. 25 files | 94.5 MB | 5368 views. WFEL's Double Storey Medium Girder Bridge. The Span Junction Set gives the MGB Double Story bridge a multi-span capability and allows bridges to be constructed over supports which are either fixed or floating. Popular Medium-girder-bridge 3D models View all . Reduced manpower compared to standard MGB. In both cases, ramp, deck and curb units complete the construction. The MGB Span Junction Set consists of span junction posts, which are pinned together at the top and connected at the bottom by hydraulic articulators. The MGB is a lightweight, man portable bridge and can be assembled without help from heavy equipment. All segments are man portable. The medium girder bridge (MGB) is lightweight, hand-built, bridging equipment, it can be built in various configurations to provide a full range of bridging capability for use both in the forward battle area and in the communications zone. Capsil Roller Beam of the Medium Girder Bridge. The Medium Girder Bridge is a classic piece of engineering. MGB Design. It consists of vertical connecting posts with longitudinal hand rails, creating a continuous barrier along the edge of the bridge. Single spans can reach 48 metres. This type of bridge is used for short span, that can carry heavy loads. The single story MGB bridge is constructed using top panels which are pinned together to form two girders and joined at each end by a bank seat beam creating a rigid framework. Download Images of Medium girder bridge - Free for commercial use, no attribution required. Deck units are then laid between these to form a 4.0 m (13 ft 2 in) wide roadway. U.S. Marines with Bridge Company, 7th Engineer Support Battalion, 1st Marine Logistics Group, set up a medium girder bridge at Camp Pendleton Calif., Feb. 16, 2018. A view of the sway brace system of a Medium Girder Bridge before the decking is placed. Suspension bridges become economic at spans above 500m, with the lar… Speed of erection by the low number of soldiers is its major characteristic. Used as an extension to the construction frame to roll the bridge out over the gap. Medium Girder Bridge In this way as many segments as are needed are connected end to end to form a girder of the required length to span the obstruction. WFEL's Double Storey Medium Girder Bridge. Over 500 bridges had been delivered to 38 countries.[3]. MEDIUM GIRDER BRIDGE INCLUDING BRIDGE NSN 5420-00-172-3520 BRIDGE ERECTION SET NSN 5420-00-172-3519 LINK REINFORCEMENT SET NSN 5420-01-139-1503 REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this manual.If you find any mistakes, or if you know of a way to improve these procedures, please let us know. No leveling or other preparation of the ground is required. Three such piers make up one landing bay raft. Significantly developed from its initial design to its multi-role capability of today, component interchangeability across any bridge of any age has been maintained. 4.2 Shallow deck-type bridges 34 4.3 Half through plate girder bridges 36 4.4 Standard box girder bridges 42 4.5 Slab-on-beam composite girder bridges 44 4.6 Truss girder bridges 45 4.7 Direct fastening construction 46 4.8 Integral construction 47 5 DESIGN STANDARDS 49 5.1 HMRI principles and guidance 49 This enables a lightweight, high strength bridge to be built. The primary components of the MGB system are rectangular "top deck" segments, and triangular bracing "bottom deck" segments. The heavier duty double-storey configuration is used for heavy loads or longer spans. The bridge can be supported on unprepared and uneven ground without grillages. Soldiers (299 MRBC) steady the launch nose of a Medium Girder Bridge during erection over the Kazer River, Mosul, Iraq, 2003. The floor of the bridge consists of a number of 19-foot-wide (5.8 m) transoms that run across the bridge, with 10-foot-long (3.0 m) stringers running between them on the bottom, forming a square. This requires a total crew of 40 personnel—24 for the main bridge, 8 for the MGB Portable Pier and 8 to install anchorages. This article does not contain any citations or references. The chains are suspended 2 metres (6 ft 6 in) beneath each bottom chord of the bridge and tensioned after building, by pulling the reinforcing posts into the vertical position. Kazer River, Mosul, Iraq, 2003. The segment… 2 span double storey up to 51.5 m with a MLC of 70, 3 span double storey up to 76 m with a MLC of 70. Design and construction techniques already popular and common for the I-beam form of composite bridges can be utilised to produce box girder structures of clean appearance whilst maintaining relative simplicity and speedy construction procedures. Highly transportable, rapidly deployed, adaptable and cost-effective, it is ideal for a wide range of military or emergency and disaster relief situations. Our inventory and customized bridges include Pedestrian Bridges, Cyclist Bridges, Equestrian Bridges, All Purpose Trail Bridges, Snowmobile Trail Bridges, Golf Course Bridges, Utility Bridges, Pipe Support Bridges, Logging or Mining Bridges, & … MGB can be built in various configurations to provide a full range of bridging capability for use both in the forward battle area and in the communications zone. Hello, I hope You enjoy to examin this 3D printable Medium Girder Bridge. Chapter 1 - Medium Girder Bridge Components. Single storey construction provides either floating bridges or ferries for load classes up to MLC 60.
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