Acrow Pony Truss
View Exhibit mapAcrow Ltd. was granted a patent in 1973, with their system based on the Bailey design. Since that time, the system has been updated and patented in 1990 to be a stronger, longer and more adaptable design. The current "3rd generation" bridge design is lighter than the original design with a truss that is 50% deeper, 50% stronger in bending and 20% stronger in shear. These improvements are achieved through an improved shape and design of the panel configuration. The triangular panels deviate from the original lattice design in that the panels can be situated and pinned to eliminate the stresses associated with pinhole sag and elastic deflection. For longer spans, the panels can also be staked vertically and connected to create a two-tier system with enhanced stiffness.
Acrow Bridge (Essex County, Massachusetts)
Acrow Pony Truss bridge over Saugus River on General EdwardOpen to traffic
Barrackville Covered Bridge 48-25-02 (Marion County, West Virginia)
Built in 1853 by Eli & Lemuel Chenoweth; Bypassed 1987; ACROW pony truss installed 1991 due to deterioration; Renovated 1998Burr arch-truss bridge over Buffalo CreekOpen to pedestrians
Bridge of Lions (Temporary) (St. Johns County, Florida)
Built in 2006 as temporary bridge while original was rehabilitated; removed in 2010.Removed Acrow Pony Truss vertical lift bridge over Matanzas River on Anastasia Boulevard at St. AugustineRemoved but not replaced
Charlestown Bridge (Temporary) (Suffolk County, Massachusetts)
Built 2020Bailey pony truss bridge over Charles River on North Washington Street (Temporary Alignment)Open to traffic
City Island Bridge (Temporary) (Bronx County, New York)
Built 2015; Removed 2017Bailey pony truss bridge over Hutchinson River on City Island RoadBuilt as temporary bridge while new replacement bridge was built in place of original.
Division Street Bridge (new) (Cook County, Illinois)
Ordered from a catalog and assembled; opened September 30, 2014.Bailey pony truss bridge over Chicago River North Branch Canal on West Division StreetOpen to traffic
Fore River Bridge (Temporary) (Norfolk County, Massachusetts)
Built as a temporary bridge in 2006; Disassembled in 2017 but parts remain in storageBailey/Acrow pony truss vertical-lift bridge over Weymouth Fore River on MA 3A (Temporary alignment)In storage or disassembled. Bridge was removed in 2017 but as of 2020 parts remain next to the new bridge
I-5 - Skagit River Bridge (Skagit County, Washington)
Built 1955. One span collapsed May 23, 2013, Reopened with a temporary span on June 19, 2013, temporary span replaced on 15 September, 2013 and now open to trafficThrough truss bridge over Skagit River on I-5 in Mount VernonOne span collapsed May 23, 2013, Reopened with temporary span June 19, 2013; temporary span replaced with a permanent span on 15 September, 2013 and now open to traffic
Kuhio Highway Wailua River Bridge (NB) (Kauai County, Hawaii)
Ahukini Terminal & Railway Co. concrete deck girder "substructure" bridge built 1920; Railroad abandoned & converted to single-lane road use 1958; Dual-lane ACROW truss roadway added 2009Concrete deck girder bridge over Wailua River on Kuhio HighwayOpen to traffic
Lagoon Pond Drawbridge (Temporary) (Dukes County, Massachusetts)
Built 2010; Removed 2015Lost Bailey pony truss bridge over Lagoon Pond on Beach RoadReplaced by a new bridge
Lake Champlain Drawbridge (Temporary) (Grand Isle County, Vermont)
Constructed as a temporary bridge and demolished upon completion of new fixed bridgeTemporary bascule bridge over Lake Champlain on US 2Replaced by a new bridge