The Strauss Bascule Bridge Company, Inc., engineers and designers of trunnion, bascule and direct lift bridges. . this design is theuse of cassion-like reinforced concrete counter-weight enclosures, serving as pits, supported byconcrete brackets on the sides of the piers. Thebottom of these enclosures is at low water eleva-tion and they serve the purpose of preventingthe counterweight becoming immersed during highwater stages. This type of construction is muchless expensive and more simple than the ordi-nary method of building a pier large enougha pit within its confines. The advantageous leal
The Strauss Bascule Bridge Company, Inc., engineers and designers of trunnion, bascule and direct lift bridges. . this design is theuse of cassion-like reinforced concrete counter-weight enclosures, serving as pits, supported byconcrete brackets on the sides of the piers. Thebottom of these enclosures is at low water eleva-tion and they serve the purpose of preventingthe counterweight becoming immersed during highwater stages. This type of construction is muchless expensive and more simple than the ordi-nary method of building a pier large enougha pit within its confines. The advantageous leal u res ofUnderneath Counterweight Type arcas follows: 1. The dead load of the bridge i fixed load on the foundation during operation ofthe bridge, an ideal condition for the design ofthe foundations. 2. Pivotal connection of the counterweightgives maximum moment arm for counterweightand in most cases eliminates necessity of a countcr-weight-pit in the foundations. For the samereason the shape of the counterweight is readilyadapted to the available space beneath the roadway. The Strauss Bascule Bridge Company. I Id 11 \) \si. B The Strauss Bascuh Bridge Company Break in floor located in from of mainms precluding the possibility of the bridgeOpening under live load, likewise prevents theforming of an opening, or trap, in the floor throughto the pit or stream as the bridge opens. (SeeFig. 8. page 19.) 4. Motors and operating machinery locatedin readily accessible enclosures and secured tofixed supports which remain stationary duringoperation of bridge, facilitating electrical lubrication, inspection ; , in, i. - of 1 5. The vital partsnions, are securely housed in journal bearings linedwith phosphor bronze bushings, well lubricated,reducing wear to a minimum, protected againstinfluence of weather, lodgment of dirt. etc. Trun-nions in their bearings give surface contact withpressure distributed over requisite area for safeunit load.
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Keywords: ., bookcentury1900, bookdecade1920, bookidthestraussba, bookyear1920
