Historic metal truss bridge in Sandy Hook, Newtown, CT. It was constructed in 1934 and spans the Housatonic River connecting Newtown and Southbury. It is 300 feet in length. At one time, prior to the construction of I84, route 6 ran across this bridge and there was a great deal of truck traffic. The volume was second only to the shoreline route one. Therefore a very strong bridge was required to handle the traffic volume. The Parker truss was a common choice for bridges of this length. The curved top chord gave the truss greater depth in the middle, where it was needed most, and thus saved material over a straight-chord Pratt truss of comparable size. The Parker truss was, however, somewhat more complicated to engineer and fabricate.