Soldiers (299 MRBC) steady the launch nose of a Medium Girder Bridge during erection over the Kazer River, Mosul, Iraq, 2003. (U.S. Marine Corps photo by Cpl. Savona Equipment will buy, sell and consign your new or used steel bridges. Army DA administrative publications and forms by the Army Publishing Directorate APD. Adam Dublinske) 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. Different bridge lengths are created by varying the number of bays used to suit the gap being crossed. MACH MGB is field proven and used worldwide. 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). Short/low load bridges can be constructed using just top deck components. The Link Reinforcement Set (LRS) is constructed when a long, high class type of bridge is required. 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. The components can be easily transported by bridging trucks, trailers, or by helicopter. Box Girder Bridge is a bridge where the key beams consist of girders shaped like a hollow box. Single-storey bridges can be constructed by 9 to 17 soldiers. These may include any combination of existing supports, pontoons, existing or improvised piers and the MGB Portable Pier. *FREE* shipping on qualifying offers. This article does not contain any citations or references. Box girders comprise structural steel, pre-stressed concrete, reinforced concrete or composite of steel. No results. Although using an LRS provides a longer bridge span, it lowers the Military Load Class from 70 to 60. 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. All segments are man portable. 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. The primary components of the MGB system are rectangular "top deck" segments, and triangular bracing "bottom deck" segments. Medium Girder Bridge on Amazon.com. 16 Bay With Link 4.jpg 1,184 × 589; 287 KB 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. 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). For information about how to add references, see Template:Citation. 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. Allocation/Capabilities. For information about how to add references, see, Articles incorporating text from Wikipedia, https://military.wikia.org/wiki/Medium_Girder_Bridge?oldid=4178805. Preface. The WFEL Medium Girder Bridge (MGB) is a classic example of high-quality precision military engineering that has stood the test of time. Single spans can reach 48 metres. Chapter 1 - Medium Girder Bridge Components. 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 Kazer River, Mosul, Iraq, 2003. The Medium Girder Bridge (MGB) is a lightweight, man portable bridge and can be assembled without help from heavy equipment. The bridge is then constructed using a suitable crane or CALM vehicle. This is a good example from US forces in Afghanistan of the MGB being used a… Generally, short bridges (less than 100m span) are achievable via a concrete or steel beam construction. The ends of the roller beams are supported on base plates and each can be adjusted in height. 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. Girder Bridge Parts 1-8 3D printable. 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. Medium-girder-bridge 3D models ready to view, buy, and download for free. Suspension bridges become economic at spans above 500m, with the lar… MACH MGB uses standard MGB components supplemented by special components designed to assist mechanical handling. In UK service, the modern form of the MGB is the medium Girder Overbridge, or MGOB. This prohibits the heavier vehicles in use by the military from crossing. 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. Girder bridge systems are highly transportable, can be rapidly deployed and are considered cost effective. The MGB Pontoon is fabricated from marine grade aluminum alloy. 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 The latest technologies high quality electronic pubs and … Reduced manpower compared to standard MGB. Cable-stayed bridges are optimal for spans from about 250m to 750m. The Medium Girder Bridge is a classic piece of engineering. Deck units are then laid between these to form a 4.0 m (13 ft 2 in) wide roadway. 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). Used as an extenstion to the construction frame to roll the bridge out over the gap. Component Lists. 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. No leveling or other preparation of the ground is required. Aerial view of the nearly complete erection of a Medium Girder Bridge over the Kazer River, Mosul, Iraq, 2003. 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. A view of the sway brace system of a Medium Girder Bridge before the decking is placed. 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. Disadvantages of the MGB/LRS. Highly transportable, rapidly deployed, adaptable and cost-effective, it is ideal for a wide range of military or emergency and disaster relief situations. 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. This type of construction requires a building party of 34 soldiers, and is built on three roller beams. This type of bridge is used for short span, that can carry heavy loads. 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. 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. The MGB is a lightweight, man portable bridge and can be assembled without help from heavy equipment. It was designed for SLS printing,- made of Nylon/Polyamide - Girder Bridge Parts 1-8 3D printable - 3D model by kaadesign (@kaadesign) [09bf953] Short/low load bridges can be constructed using just top deck components. Please improve this article by adding a reference. 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. The MGB launching nose suspended over the gap. 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. Aerial view of the erection site of a Medium Girder Bridge over the Kazer River, Mosul, Iraq, 2003. 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. This enables a lightweight, high strength bridge to be built. The segment… A series of wedges are used to create a distinctive hump which limits deflection when carrying heavy vehicles. The bridge can still be built by hand if the crane or hydraulics are incapacitated. 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. This article does not contain any citations or references. The heavier duty double-storey configuration is used for heavy loads or longer spans. MGB Double Storey multi-span bridges usually take the form of two or three span structures rated at MLC 70. Advantages of the MGB/LRS. 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 . Bracing with the additional lower deck dramatically strengthens the bridge allowing heavier loads and longer spans. Single storey construction provides either floating bridges or ferries for load classes up to MLC 60. The Medium Girder Bridge is a classic piece of engineering. 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. Media in category "Medium Girder Bridge" The following 69 files are in this category, out of 69 total. medium-girder-bridge. 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. 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 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. This requires a total crew of 40 personnel—24 for the main bridge, 8 for the MGB Portable Pier and 8 to install anchorages. Two such longitudinal girders are constructed parallel to each other to provide the bridge's strength. Please improve this article by adding a reference. 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. Off-System 24-Ft Rdwy Bridge Standards Available for download Prestressed I-Girder standards are available for structures with Type Tx28 thru Tx62 girders. Two pontoons are coupled back to back to create each pontoon pier. Bracing with the additional lower deck dramatically strengthens the bridge allowing heavier loads and longer spans. 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, & … 3 Like. 25 files | 94.5 MB | 5368 views. DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. In addition, it is also a deck type, two-girder bridging system capable of carrying loads up to and including Main battle tanks (MBT). Speed of … Longer bridges are only able to carry lighter loads. The Medium Girder Bridge (MGB) is a lightweight, man portable bridge and can be assembled without help from heavy equipment. Kazer River, Mosul, Iraq, 2003. 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. Powered pontoons are driven by a 75 hp (56 kW) diesel engine with a water jet propulsion unit. Single-span bridges are launched using a centrally mounted launching nose. Depending on the span required, several different types of bridges are in common use today. The primary components of the MGB system are rectangular "top deck" segments, and triangular bracing "bottom deck" segments. Hello, I hope You enjoy to examin this 3D printable Medium Girder Bridge. In both cases, ramp, deck and curb units complete the construction. 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. All except three parts weigh under 200 kg. Download Images of Medium girder bridge - Free for commercial use, no attribution required. Kazer River, Mosul, Iraq, 2003. 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. 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. The length of these bridges is limited only by the amount of equipment available. In some cases we can also arrange removal of the bridge. Over 500 bridges had been delivered to 38 countries.[3]. Speed of erection by the low number of soldiers is its major characteristic. The MGB is rapidly-deployable, adaptable and cost-effective. Bailey bridge for another bridge type with mobile military application. The Medium Girder Bridge is modular, lightweight, and can be assembled in a short period of time. Fully laden pontoons can operate in currents up to 2.5 m/s (4.9 knots). 775 Views 2 Comment. 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. In operation since 1971, over 500 MGB systems have been acquired by 40 armed forces worldwide. Popular Medium-girder-bridge 3D models View all . 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. 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. Handrail components can be carried on an MGB palletor unit transport. Medium Girder Bridge Capsil Roller Beam of the Medium Girder Bridge. This creates a fully reinforced structure. It consists of vertical connecting posts with longitudinal hand rails, creating a continuous barrier along the edge of the bridge. Three such piers make up one landing bay raft. The LRS deepens the girder and transfers the load throughout the length of the bridge. English: The Medium Girder Bridge (MGB) is a lightweight, man portable bridge and can be assembled without help from heavy equipment. 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. A 16-Bay with LRS Medium Girder Bridge across the Kazer River, Mosul, Iraq, 2003. MGB units are light, easily transported and can be adapted for most tactical bridging requirements. Used as an extension to the construction frame to roll the bridge out over the gap. The bridge can be supported on unprepared and uneven ground without grillages. The MGB is constantly in use, and increasingly in demand, for both military and disaster relief operations. 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.

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