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PHEASANT RUN FLAT CAR <br />PORTABLE BRIDGE SPECIFICATIONS: <br />LOCATION : HAUL ROAD ON SITE OVER THE ROCKY FORD HIGH LINE CANAL <br />STRUCTURE TYPE : RAILROAD FLAT CAR <br />SPAN LENGTH : MAXIMUM SPAN 40 FEET PLUS OR MINUS <br />SKEW : HAUL ROAD AND BRIDGE ARE PERPENDICULAR TO THE ABUTMENTS <br />STRUCTURE WIDTH: 14 FT. OUT TO OUT OF TIMBER DECK, FLATCAR IS APPROXIMATELY 8 FT. WIDE <br />BEAM TYPES : TYPICAL FLAT CAR CONSISTS OF LARGE MAIN GIRDERS ALONG THE CENTERLINE OF <br /> THE CAR WITH LIGHTER WEIGHT EXTERIOR BEAMS ALONG THE EDGES. THE SIZES AND <br /> RELATIVE STIFFNESS RATIOS BETWEEN THE INTERIIOR AND EXTERIOR BEAMS VARY <br /> PER EACH FLAT CAR LENGTH. THE DECK WILL BE DESIGNED FOR THE SUPERIMPOSED <br /> LOADS THAT ARE REQUIRED FOR THE MINING OPERATION APPROXIMATELY 21 TONS <br /> PER LOADED TRUCK. A SAFETY FACTOR OF 2.5 WILL BE USE FOR DESIGN LOADS. <br />DECK : TIMBER DECK CONSISITING OF 4" X 12" PLANKS AT 15" ON CENTER. LONGITUDINAL RUNNERS <br /> UNDER EACH WHEEL LINE (TRACK) CONSISTING OF (3) 4' X 12' PLANKS. A STEEL PIPE RAILING <br /> SHALL BE INSTALLED. <br />ABUTMENTS : CONSISTING OF CONCRETE BLOCKS APPROXIMATELY 24" X 24" X 72" STACKED AND <br /> SET INTO PLACE BY TAMPING AND COMPACTING ROAD BASE GRAVEL IN AND AROUND THEM <br /> TO FORM A STEADY BEARING FOR THE ENDS OF THE RAIL ROAD FLAT CAR. THE ABUTMENTS SHALL <br /> BE SET BACK FROM THE CANAL BANK APPROXIMATELY 5 FEET OR MORE TO MAKE SURE THAT <br /> THE EARTH BELOW WILL NOT SHEAR OFF INTO THE CANAL <br />I CENTER LINE I <br />_~ 50' ~ OF DITCH 56 ~ ~~ <br />NO MINING BUFFER ZONE NO MINING BUFFER ZONE <br />RAIL ROAD FLAT BED CAR <br />WITH WHEELS REMOVED <br />70 TON CAPACITY (140,000 LBS) <br />- STACKED CONCRETEBLOCKS <br />~_ - TO FORM THE ABUTMENTS <br />TYPICAL CROSS SECTION <br />PHEASANT RUN GRAVEL PIT <br />AND PORTABLE BRIDGE SPECIFICATIONS <br />EXCAVATE & BACKSLOPE <br />3H:1 V <br />REVISION DATE 12/10/2007 ADD PHREATIC SURFACES <br />EXAMPLE OF RAIL ROAD FLAT CAR (RRFC) BRIDGE <br />