EMBANKMENT TO THE REQUIRED EXTENT AND TO FURNISH PROTECTION AGAINST EROSION.
LENGTH OF WINGWALL
A C ROADWAY OR C STREAML L
SLOPE DOWN
EDGE OF SHOULDER
OR TOE OF FILL
(ADJUSTED AS PRACTICAL)
REQUIRED)
C BRGS.L
SL
OP
E
UP
C
RO
AD
WA
Y
L
EDGE OF SHOULDER
(ADJUSTED AS PRACTICAL)
IN GENERAL, PROVIDE WINGWALLS OF SUFFICIENT LENGTH TO RETAIN THE ROADWAY
USING THE ACTUAL CONDITION AT THE SITE.COMPUTE WINGWALL LENGTHS
THE FOLLOWING METHOD IS PROPOSED TO COMPUTE THE REQUIRED LENGTHS.
SCHEME A
SCHEME B
LENGTH OF WINGWALL
WING LENGTH x COS ( )
= -x
W.L. = CALL
W.L.( ) =
( ) =- +W.L.( )
ELEV. A - ELEV. C =
ELEV. B = ELEV. A -
HENCE ELEV. B =
WING LENGTH x COS ( )
+
ANGLE BETWEEN PERPENDICULAR TO ROADWAY CENTERLINE & FRONT
° ';ANGLE BETWEEN FRONT FACE OF WING &
GIVEN:
;
.
STR.BED
**
*
*
FACE OF ABUT.
FACE OF WING
*
ELEV. A
ELEV. B
ELEV. C
ELEV. D
ELEV. E
FIND ELEV. B :
L ROADWAY OR
BRIDGE SKEW ( )=
FRONT FACE OF ABUTMENT ( ) = ° '
FACE OF WING ( ) = ° '
WING LENGTH x SINE ( )
STANDARD
L STREAM FIND WING LENGTH:
C
C
SHEET 1 OF 1
BD-625M
COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION
CONTOUR LINE ELEVATIONS
FIXED END
FREE END
OR MORE ON OUTLET END ONLY.
REFERENCE DRAWINGS
RC-12M BACKFILL AT STRUCTURES
WINGWALL LENGTH
CHIEF BRIDGE ENGINEER
RECOMMENDEDRECOMMENDED
806
805
804
803
802
801
800
804
805
806
807
808
809
810
811
812
FILL SLOPE
CU
T
SL
OP
EUSE 807.00 AS TOP OF WINGWALL
ELEVATION. (MIN. 6" HIGHER THAN
HIGHEST ELEVATION AT FREE END OF WALL: 806.30
CUT SLOPE FILL SLOPE
( FOR 'U' WINGS ADD 3' TO THE COMPUTED LENGTH. )
FILL SLOPE
SUBTRACT 6" TO COMPUTE WING LENGTH ONLY.
** [ELEV. C -ELEV. D ]= 12" + STREAMBED SLOPE x COS ( )
1
{
1
{FILL SLOPE
CUT SLOPE
WINGWALL
SLOPE DEFINITIONS
PLAN
TYPICAL SECTION
BUREAU OF PROJECT DELIVERY
DIRECTOR, BUR. OF PROJECT DELIVERY
WINGWALL LENGTH
W.L.( )
APR.29, 2016 APR.29, 2016
