Girder Bridge
Girder Bridge
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 BRASS 635 FOOT PONY PLATE GIRDER BRIDGE 1 TRACK SILVER NEW  US $224.95
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 NMS10 HO BRASS PONY PLATE GIRDER BRIDGE by PRECISION BRASS ARTWORK US $219.95
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 NMS08 Precision Brass Artwork Hand Made HO 74 Deck Girder Bridge w Walkways US $199.95
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 NMS06 BRASS HO 80 PONY PLATE GIRDER BRIDGE by PRECISION BRASS ARTWORK US $179.95
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 BRASS PBA 80 FOOT DECK GIRDER BRIDGE 1 TRACK F P NEW US $174.95
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 BRASS PBA 80 FOOT DECK GIRDER BRIDGE 1 TRACK F P SILVER NEW US $174.95
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 BRASS PBA 80 FOOT DECK GIRDER BRIDGE 1 TRACK F P RED NEW US $174.95
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 BRASS PBA 80 FOOT DECK GIRDER BRIDGE 1 TRACK F P GRAY NEW US $174.95
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 BRASS PBA 1007 3 60 FOOT DECK GIRDER BRIDGE 1 TRACK F P GRAY NEW US $149.95
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 BRASS 74ft DECK GIRDER BRIDGE w WALKWAYS UNPAINTED US $149.95
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 BRASS PBA 1007 2 60 FOOT DECK GIRDER BRIDGE 1 TRACK F P SILVER NEW US $149.95
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 BRASS PBA 1007 4 60 FOOT DECK GIRDER BRIDGE 1 TRACK F P RED NEW US $149.95
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 NMS04 BRASS HO 38 DECK GIRDER BRIDGE w WALKWAYS by PRECISION BRASS ARTWORK US $144.95
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 BRASS 39ft DECK GIRDER BRIDGE w WALKWAYS 1 TRACK F P NEW US $139.95
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 BRASS 39ft DECK GIRDER BRIDGE w WALKWAYS UNPAINTED NEW US $139.95
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 VINTAGE FALLER HO SCALE BUILDING KIT GIRDER BRIDGE CHURCH DAIRY FARM RURAL US $119.99
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 VOLLMER 2546 HO H0 KIT Box Girder Bridge one way US $59.99
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 100 ft DOUBLE TRACK PLATE GIRDER BRIDGE on LEGS Kit HO Scale US $49.99
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 HO CUSTOM Double Span BUILT 130 Girder Truss Bridges Painted w 3 Piers US $49.99
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 ATLAS HO PLATE GIRDER BRIDGES 4 PACK ERIE RAILROAD US $49.99
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 HO 160 ft SINGLE COMBO GIRDER BRIDGE w TRACK Kit US $49.95
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 HO EXACTRAIL EE 9901 1 72 PLATE GIRDER BRIDGE BLACK EE 9901 1 US $44.95
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 HO EXACTRAIL 72 PLATE GIRDER BRIDGE BURLINGTON BNSF EE 9912 1 US $44.95
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 HO EXACTRAIL 72 PLATE GIRDER BRIDGE CSX EE 9914 1 US $44.95
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 Micro Engr 75523 100 Through Girder Bridge Doubl US $40.97
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 ExactRail 72 Deck Plate Girder Bridge Early Version BNSF EE 9912 1 US $40.00
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A relatively new engineering machine is a launching gantry, which is used to erect girders. Why "launch"?
Apparently a horizontal truss-crane rests on two piers and lifts girders into place in building a bridge. What I am trying to figure out, is why the word "launch" is used. Does "launch" means "raise into the air" or what?
It's not a haunch crane, it's a launching gantry.
Are you sure that it is not a haunch crane.