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