Plastic article or earthenware shaping or treating: apparatus – Building forms or construction engineering type mold with...
Patent
1975-04-10
1976-10-12
Baldwin, Robert D.
Plastic article or earthenware shaping or treating: apparatus
Building forms or construction engineering type mold with...
249 20, E01D 100, B28B 2302
Patent
active
039854809
ABSTRACT:
There is disclosed apparatus for the sectional cantilever construction of bridge girder systems of reinforced or prestressed concrete having a superstructure comprising a closed box cross-section and superimposed laterally overhanging bridge decking, said apparatus comprising travel devices for abutting against an already finished part of the bridge superstructure at whose position fixed support members, e.g. hydraulic jacks are disposed during the concreting operation, longitudinal girders projecting in the concreting condition over the front end of said finished superstructure part and connected to said travel devices or fixed supports therefor; shuttering components, for a cantilever section, carried by said girders; and half-frames engaging laterally round said bridge deck and having means for supporting on said bridge deck; the apparatus being further characterized by said longitudinal girders being arranged laterally outside the shuttering for the side walls of the superstructure and being connected with outer shuttering made inherently rigid and self-supporting; by said half-frames being connected (in such a way as to be rigidly resistant to bending) to longitudinal girders substantially at the rearward ends of said shuttering; by said longitudinal girders being provided at the side opposite the part which is projecting and which carries said shuttering with devices for abutting against or supporting the underside of said laterally overhanging bridge deck. There is also disclosed an auxiliary structure for use with such apparatus.
REFERENCES:
patent: 2963764 (1960-12-01), Finsterwalder
patent: 3003219 (1961-10-01), Suter et al.
patent: 3299191 (1967-01-01), Mantscheff et al.
patent: 3425076 (1969-02-01), Finsterwalder
patent: 3490605 (1970-01-01), Koss
patent: 3571835 (1971-03-01), Buechler
patent: 3579759 (1971-05-01), Zuccolo
Baldwin Robert D.
Durr Frank L.
Dyckerhoff & Widmann AG
Greene Orville N.
McQuade John
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