Plate Girders

Jamestown specialise in the manufacture of Plate Girders and Box Girders. These may also be referred to as Welded Beams, Automap Beams, Plate Beams, and Fabricated Beams. These are structural steel beams made from plate sections welded together to form structural beams.

These may have openings pre-cut in the webs and may be referred to as cellular beams. These openings can be of any size or shape depending on the designers requirements, e.g. Service opes.

The three components (or 4 in the case of box girders), namely the top flange, the web plate and the bottom flanges may be different sizes, thicknesses and grades, which allows the designer to create a plate girder that specifically meets their needs and minimises material usage, e.g. asymmetric beams with wide bottom flanges can be designed to carry concrete slabs. Beams can be designed with precamber, varying depth, varying width and varying load carrying capabilities along the length of the beam.  

Plate Girders allow the designer to be truly flexible to meet the requirements of the job without the constraints of universal beam tables.  Jamestown can fabricate plate girders with connection plates, stiffeners, complex joints, shear studs, couplers, lifting lugs etc. so that the beam that leaves our works is finished and ready for installation.