GB1405146A - Pre-fabricated bridge constructions - Google Patents

Abstract

1405146 Sectional bridges BATAAFSE AANNEMING MAATSCHAPPIJ NV 13 Oct 1972 [15 Oct 1971] 47390/72 Heading E1G [Also in Division F2] In a bridge assembly wherein a deck extends between at least two bridge main girders 3 each consisting of successive sections extending along the bridge length and conjoined as by bolted flange connections 5, 6, the deck consists of abutting deck sections 2 which are shorter, in the direction of bridge length, than the girder sections and are rigidly connected thereto, while each girder section comprises a rigid hollow triangular prismatic framework 3a..c of beams, trusses or plates, the framework being triangular in cross section transverse of the bridge with the triangle base parallel to the bridge deck. Bolted connections. As shown each end of each deck section has a pair of lower and upper apertured brackets 25, 26 seating over and clamped to frusto-conical pins 23, 24 on lower and upper plates 21, 22 on the girder. Each bracket aperture, Fig. 5, has clearance around its respective pin 23 or 24 and is centred by a ring of tapered depending fingers 31 or 32 which are forced down (and so expanded) between pin and aperture as a securing bolt 37 or 38 threaded in the respective conical pin is tightened. To connect the main girder sections end to end each set of aligned holes in the flanges 5, 6 receives Fig. 6 (not shown) a split sleeve (8) which is expanded by a bolt (14) drawing together a cup (10) and tapered plug (13).