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DESIGN NETES Specifications Design Bridge Design Specifications ( 1983 AASHTO Specifications with revisions by Caltrans) Depth of - cover is assumed to be uniform '4arth Load Earth pressures for two conditions 140 Ib/CF Vert, 42 lb/CF horiz 140 lb/CF vert, 140 lh/CF horiz t�t Unit Stresses f'c = 5 0 KSi fy = 650 KSl for welded wire fabric n=7 Shear. •7' Maximum allowable shear, v = 3 � psi g. e1 'Exclusion J Axial loading on the members has Cif not been considered " Earthwork - See "Precast RCB Culvert, Excavation -`� and Backfill Details" sheet CC; s' '- GENERAL NOTES Designation: Standard single or multiple precast box culverts are shown on the plans as span times height with maximum cover over roof thus: 6' x 5' RCH with 10' or double 10' x 5' RCB with 20', followed by alternatives. Alternatives: Single cell: Standard dimensions of AASHTO Material Specification 'M259' or 1273'. Multiple Cell: Constructed by placing single cells adjacent to each other. Inlet and outlet ends of culvert will be rounded unless square ends are designated. Parapet will be shown unless designated in plans, Such designation may be different for inlet and outlet ends. Limitations: Where the overfill is less than 1 foot, precast RCH culverts are not to be used. Precast RCH culverts are not to be used in siphon or pressurized installations unless appropriate "watertight" jointing is provided. Special Reinforcement Coverage: Precast RCB culvert standard details are not to be used in a corrosive environment or where there is a severe abrasive flow condition or freeze -thaw locations. Special design: Required for culvert with different conditions, or loads or design bearing pressures greater than those given on these plans. Required for culverts where end details need higher skew angles or higher parapets or barrier sections ` Cb RCH i Intermediate box .� Longitudinal joint �j' /Traffic �► Transverse joint Cross wires End box \ i \ PRECAST RCB TERMIN❑L❑GY Note. Inner and outer reinforcement to be exposed as required to tie to cast -in -place construction. A minimum of two cross wires shell be exposed on all sides. 4' min _ Skewed precast end box FFT- Skew angle Extend precast RCH reinforcement 4' min. 1' min �- I'-7 Extended height parapet 0'-10" Standard height parapet PARTIAL PLAN VIEW A'P For illustrative purposes only. For correct skew direction see plans. C❑NSTRUCTI❑N NOTES Cutoff Fells: 4' Cutoff walls are to be provided at inlet andlor outlet unless channel is lined and unless otherwise shown. These walls are to be extended if scour conditions warrant, See Standard Plans D84, D85 and DB6A Fingwalls: Wingwalls shall be cast -in -place and shall conform to standard plan details for box culvert wingwalls. See Standard Plans DB4, D85 and D86A 3" Space between boxes to be Q RCB �� filled with slurry cement m M w - d T�7 Eztend precast RCB reinforcement #5 tot. 6 m Y I 4" U 0 12 vertically 4U _ 3" Std height parapet 6" Extended height parapet PARTIAL PLAN INTERI❑R WALL MULTI CELL CULVERT 15 tot 7 10' #4 U 9 12 vertically lfingwall SECTI❑N C-C STANDARD DRAWING J FILE NO. XS 4-28 DESIGN YY --I, CHECKED GAA GHlC APPROVAL �CDNNENDm ➢Y ' DESIGN I DETAILS ILL- NY R. Ya'S ICFECKED GAZr-4carw DATE p j 1 O/ JC S SUBMITTED BY COTTFi'R SIGN I ACAD FILE NAME _ I DRAWER SHEET NO. I _ DRAWN 8Y I DATE I PROJECT ENGINEER i DAIS e•\bodge\w688\XS42s I 1 Earthwork: See "Precast RCB Culvert, Excavation and Backfill Details" sheet. A Construction Loads: Strutting may be required near temporary ends. For construction loads on culverts, see Standard Plan DBB. #5 [ tot. 4 -- _ 2" clr �--15 [tt ot. 4 C 15 tot. 3 C #5 tot. 3 - Parapet 'P" Bars Cutoff wall. For #4 U ® 12 cutoff wall dimensions Skew 0" 16- 31° and reinforcement, see Angle to to to Standard Plan wingwall details as noted T " Span 15° 30° 45e on the plans 4' #4 14 #4 1 B 4 4 X 8' 4 5 X I I to' #5 X X 12' #B X X 14' 17 X X PARAPET REINS❑RCEMENT Design limited by skew of precast reinforced concrete box section tot � Wingwall 10' �- #4� ® 12 vertically 10, haunch typ Cast -in -place Precast Parapet 101 bars tot. 3 b =a top and bottom ��T Precask RCH #4 11 ® 12 ✓r reinforcement FSllet �—Haunch 6" Haunch I Note: h = Height ( ft ) s = Clear span ( ft ) a = 12 cosine skew angle SECTION A —A ( Standard height parapet ) CAST -IN -PLACE END ELEVATI❑N 1'-0" I" Chamfer typ Guardrail ( If used ) #5 Cent tot. 8 2" clr - �FG ( 5% Max. ) #5 F3 E E 14 t) 9 12- 15 tot. 3 ) iPrecast RCB 16 tot. 3 (~ reinforcement R=6" I 1'-9" I 94 Precast 15Place perpendicular Cast -in -place to rail SECTION A —A ( Extended height parapet ) TYPICAL CULVERT END DETAILS For wall and invert reinforcement not shown.See "End Elevation" detail 1 BRIDGE NO. PRECAST RCB CULVERT DIVISION OF STRUCTURES STRUCTURE DESIGN MISCELLANEOUS POST MILE MISCELLANEOUS DETAILS DEPARTMENT (1F TRANSPORTATION COUNTY OF SAN JOAQUIN I AS NOTE I DETAILS I VAN ALLEN ROAD MINOR STRUCTURE W888 REPLACEMENTI Sheet No. ` ACROSS CENTRAL SAN JOAQUIN WATER CONSERVATION DISTRICT IRRIGATOR CANAL 3 of 4 STATE OF CALIFORNIA