BD-604M

COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION

STANDARD

DESIGN & DETAILS

FOR BEAM BRIDGES

DECK ATTACHMENT, PANEL SPLICE AND HAUNCH DETAILS SHOWN ON SHEET 2.

DESIGN

THICKNESS

T

WEARING SURFACETOTAL DECK THICKNESS

S

s c

c

DYNAMIC LOAD ALLOWANCE (IM) = 50%

1.25(SLAB & PARAPET MOMENT) + 1.5(FWS MOMENT) + 1.75(1+IM/100)(LL MOMENT)

FACTORED MOMENT =

AASHTO LRFD, ARTICLE 4.6.2.1.8.

DECK DESIGN TABLES ARE BASED ON THE ORTHOTROPIC PLATE FORMULA AS PER 1994

DECK JOINT IS PROVIDED, CONTINUE ROADWAY MEDIAN BARRIER ACROSS THE STRUCTURE

LEVEL 5. THE SPLIT MEDIAN BARRIERS AND THE ALTERNATE BARRIER ARE DESIGNED TO

THE TYPICAL BARRIER, THE ALTERNATE SIDEWALK DETAIL AND DECK SLABS, INCLUDING

DESIGN IS BASED ON DECKS SUPPORTED ON 3 OR MORE BEAMS.

WHEN THE HAUNCH HEIGHT (MEASURED FROM TOP OF BEAM TO BOTTOM OF SLAB)

DESIGN TABLES ARE VALID FOR BOTH NORMAL WEIGHT AND LIGHTWEIGHT CONCRETE.

DENSITY OF NORMAL WEIGHT CONCRETE

DEAD LOAD:

MODULAR RATIO (E /E ) N = 8

CONCRETE:

STEEL BARS AND SHAPES:

MATERIAL STRENGTH:

DESIGN SPECIFICATIONS:

T

CONSTR. JT.

& V-NOTCH

(RAKED FINISH)

(RAKED FINISH)

& V-NOTCH

CONSTR. JT.

T

TO BE USED ONLY IF AUTHORIZED BY CHIEF BRIDGE ENGINEER

(RAKED FINISH)

& V-NOTCH

CONSTR. JT.

DRIP LEDGE

DRIP LEDGE

T

DRIP LEDGE

SIDEWALK WIDTH

CONSTR. JT.

& V-NOTCH

(RAKED FINISH)

CONSTR. JT.

& V-NOTCH

(LEVEL)

OPTIONAL

T

TYPICAL HAUNCH FOR GIRDERS SHOWN FOR ILLUSTRATION ONLY.

So

So

REINFORCEMENT STEEL:

y

DENSITY OF LIGHTWEIGHT CONCRETE

DEAD LOAD OF VARIOUS GRID REINFORCED SYSTEMS, USING BOTH NORMAL AND

LIGHTWEIGHT CONCRETE, AND INTEGRAL OVERFILL, ARE SHOWN IN THE TABLES ON

ATTACHMENT DETAIL APPLICABLE FOR ALL OVERLAY TYPES.

SHOWN SPACING.

RAILING TO BE USED

ONLY WHEN AUTHORIZED

ENGINEER

FIRST CROSS BAR BENEATH

BARRIER OMITTED BY

CROSS BARS OMITTED FOR

DRIP LEDGE

MAXIMUM DIMENSION FROM FACE

OF BARRIER TO FIRST CROSS BAR

BEYOND BARRIER

BARRIER REINFORCEMENT TO REST

DIRECTLY ON BOTTOM CROSS BAR

OF GRID (TYP)

DIRECTLY ON BOTTOM CROSS BAR

BARRIER REINFORCEMENT TO REST

OF BARRIER TO FIRST CROSS BAR

BEYOND BARRIER

OF GRID (TYP)

So

T

MODIFY "A" FOR A CONCAVE (SAG)

IS NOT INCLUDED IN "A".VARIATION IN FLANGE THICKNESS

VERTICAL CURVE.

A

GRID REINFORCED CONCRETE BRIDGE DECK

HAUNCH DETAIL

ALTERNATE SIDEWALK DETAIL

TYPICAL GRID REINFORCED CONCRETE DECK PANEL

SPLIT MEDIAN BARRIER

CHAMFER (TYP)

NOTES:

(SEE STANDARD DRAWING RC-57M FOR ATTACHMENT DETAILS).

CLEAN AND ROUGHEN TOP OF CONCRETE DECK WHICH LIES DIRECTLY BENEATH THE

SACRIFICIAL

FIRST CROSS BAR BENEATH

BARRIER OMITTED BY

CROSS BARS OMITTED FOR

T+•"

T+ƒ"

T+ 1"

UP TO 1•"

OVER 1•"TO 3"

OVER 3"

PLAN CAMBER (in ) A (in )

HAUNCH WIDTH ACROSS FULL WIDTH OF BEAM FLANGE.

ADD EFFECT OF DECK CROSS SLOPE TO "A" TO PROVIDE MINIMUM

WITH SPLICES, AS APPLICABLE.

ADD THICKNESS OF TOP SPLICE PLATES TO "A" FOR GIRDERS

BY THE DISTRICT TRAFFIC

FROM THE OUTSIDE EDGE OF THE DECK.

THE END OF THE BRIDGE, REDUCE MAXIMUM SPACING OF REINFORCEMENT TO HALF THE

SPLICE

AASHTO M270, GRADE 50, f = 50 ksi

CHIEF BRIDGE ENGINEER

RECOMMENDEDRECOMMENDED

TYPICAL CONCRETE BARRIER DETAIL

ALTERNATE CONCRETE BARRIER DETAIL

SHEETS 4 OR 5.

AASHTO LRFD BRIDGE DESIGN SPECIFICATIONS AND COMMENTARY

PART 4, SECTION D 5.4.3.1.

BARRIER NOTES

BARRIER PRIOR TO POURING THE BARRIER CONCRETE TO ENSURE ADEQUATE SHEAR TRANSFER.

FOR BARRIER SIDEWALK AND MEDIAN BARRIER DIMENSIONS SEE BD-601M. FOR BARRIER

SEE BC-739M.

REINFORCEMENT DIMENSIONS NOT SHOWN, SEE BD-601M. FOR BRIDGE BARRIER DETAILS,

USE ONLY FUSION BONDED EPOXY COATED REINFORCEMENT. FOR BARRIER

REINFORCEMENT, DO NOT USE RAIL STEEL (A996). SEE DESIGN MANUAL

1•" OVERFILL

•"

#6

#5

1•" CL.2"

2" CL. (TYP)

#5 @

1'-0"

#6

2" CL.

1•" CL.

#4 (TYP.)1"

#6 BARS

#5 BARS

#5

2"

SEE NOTE 5

SEE NOTE 19

(SEE NOTE 17 )

(SEE NOTE 17 )

#6

#5

2" CL.

#5 SEE NOTE 19

MANUFACTURER FOR 4‚"

GRID FLOOR, FIRST TWO

5‰" GRID FLOORS.

3•"

#5 SEE NOTE 19

#6

#5

2" CL.

MANUFACTURER FOR 4‚"

GRID FLOOR, FIRST TWO

5‰" GRID FLOORS.

3•" MAXIMUM DIMENSION FROM FACE

A996, OR A706.

ALL REINFORCEMENT BARS SHOWN MEET THE REQUIREMENTS OF ASTM A615,

AASHTO M270, GRADE 36, f = 36 ksi

f = 60 ksi

150 lbs/ft

115 lbs/ft

3

3

OTHERWISE NOTED.

PROVIDE 1•" CONCRETE COVER ON REINFORCEMENT BARS UNLESS

IS CONSIDERED SACRIFICIAL.

PROVIDE 1•" COVER OVER GRID. THE TOP •" OF THE OVERFILL/OVERLAY

EXCEEDS 3", PROVIDE HAUNCH REINFORCEMENT.

SHEET 1 OF 4

BUREAU OF PROJECT DELIVERY

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16. FOR STANDARD TYPICAL WATERPROOFING AND EXPANSION DETAILS SEE BC-788M.

17.

18.

19.

20.

21.

22.

4 ‚" FULL DEPTH GRID REINFORCED CONCRETE BRIDGE DECK SHOWN, DETAILS

ARE APPROPRIATE FOR 5‰" FULL DEPTH DECK DESIGNS AS WELL.

FILL HALF DEPTH GRIDS FULL DEPTH FOR A MINIMUM DISTANCE OF 3'-0"

WITHIN 14'-0" ON BOTH SIDES OF AN OPEN JOINT IN THE BARRIER, AND AT

DESIGN MANUAL PART 4, VOLUME 1, PART B DESIGN SPECIFICATIONS.

SEE NOTES ON SHEET 4 FOR STEEL GRID COATING OPTIONS.

f = 4,000 psi CLASS AAAP CONCRETE

OVERHANGS, ARE DESIGNED TO RESIST A VEHICULAR COLLISION FORCE AT TEST

RESIST A VEHICULAR COLLISION AT TEST LEVEL 4. WHEN NO LONGITUDINAL

DIRECTOR, BUR. OF PROJECT DELIVERYREFERENCE DRAWINGS

BC-726M

DECK FOR BEAM BRIDGES DESIGN & DETAILS

STEEL GRID REINFORCED CAST IN PLACE CONCRETE BRIDGE APR.29, 2016 APR.29, 2016

SHEAR STUDS TO BE

LOCATED AND WELDED

OMIT SUPPLEMENTAL GRID COMPONENTS

AS NECESSARY TO AVOID INTERFERENCE

NUT WELDED TO

SUPPORT PLATE

THREADED BOLT

USED TO SET

SUPPORT PLATE

SHOP OR FIELD

STEEL SUPPORT

STEEL OR CONCRETE SUPPORT

HEADED SHEAR STUDS NOT SHOWN IN ELEVATION DETAILS FOR CLARITY.

HAUNCH ANGLE

DEPTH VARIES TO MATCH

TYPICAL EVERY

BOTTOM ROUND

CROSS BAR

TYPICAL EVERY

FORM PAN

BOTTOM

MAIN BAR

CROSS BAR

SPLICE BAR

TYPICAL EVERY

MAIN BAR AND

MAIN BAR

TYPICAL EVERY

SUPPLEMENTARY BAR

GRID OR SUPPORT MECHANISM MAY BE TACK WELDED INTERMITTENTLY TO PREVENT

MOVEMENT DURING CONCRETE POURING OPERATION.

SPLICE REBAR MAY BE INSERTED EITHER THROUGH SLOT IN GRID I-BEAM THROUGH

WHICH CROSS BARS ARE PLACED, OR THROUGH A SEPARATE PUNCHED SLOT.

SEE NOTE 8

OR FORMED

SEE NOTE 11

TACK WELDING THREADED STUD TO SUPPORT IS PERMITTED TO ENABLE LEVELING OF

PANEL.

SEE NOTE 12

ROUND

DIMENSION OF RELIEF JOINT TO BE

SPECIFIED IN CONTRACT PLANS

MAIN BAR

TYPICAL EVERYSLOTTED HOLE

BETWEEN MAIN BARS

SPLICE BOLT THROUGH

CROSS BAR

MAIN BAR

BOTTOM ROUND

SHEAR STUD

STEEL SUPPORT

AT SUPPORT.

BOTTOM ROUNDCROSS BAR

MAIN BAR SHEAR STUD

CROSS BAR

MAIN BAR

BARS IN GRID.

BOTTOM

ROUND

CROSS BAR BOTTOM ROUND

CROSS BAR BOTTOM ROUND

MAIN BAR

FORM PAN

STEEL SUPPORT

OVERALL DECK PROFILE

CROSS BAR BOTTOM ROUND

MAIN BAR SPLICE BAR MAIN BAR

CROSS BAR

SPLICE BOLT

BOTTOM ROUND

(TYP)

BETWEEN HAUNCH

IS WELDED TO

ANGLES - NOT

REQ'D IF ANGLE

STRAP WELDED

SEE NOTE 15

ELEVATIONINSTALLED

OVER FRAMING MEMBERS.

INTERSECTION WITH EACH BRIDGE STRINGER OR GIRDER.

SUITABILITY OF ELEVATION OPTION DEPENDS ON LIVE LOAD PLACED ON GRID PRIOR

TO FILLING WITH CONCRETE.

SUPPORT PLATE TO BE SHOP OR FIELD INSTALLED UNDER CROSS BARS AS SHOWN

IN THREADED BOLT ELEVATION DETAIL, OR UNDER MAIN GRID BARS WHERE

APPLICABLE.

ANY CONSTRUCTION LOADS PLACED ON THE GRID BEFORE CONCRETE IS POURED,

AS WELL AS THE WEIGHT OF THE WET CONCRETE, MUST BE ACCOUNTED FOR IN

HAUNCH ANGLE MAY BE WELDED TO STRINGER/GIRDER WHERE PERMITTED BY

CHOICE OF SPLICE OPTION DEPENDS ON PRESENCE OF TRAFFIC DURING

CONSTRUCTION AND WIDTH BETWEEN STAGES. FOR ATYPICAL CONDITIONS (SPLICE

BETWEEN STRINGERS, FOR EXAMPLE) CONTACT MANUFACTURER.

TYPICAL EXPANSION/RELIEF JOINT

ELEVATION OPTIONS

SPLICE BETWEEN PANELSFORMED ANGLE - WELDED STRAP

THREADED BOLT

BOLTED PLAN VIEWSPLICE BAR PLAN VIEW

CROSS BAR OVERLAY PLANWELDLESS PLAN VIEW

PLAN VIEW

SECTION E-ESECTION C-C

NOTES:

SECTION D-D

C C

D

D

E E

SECTION B-BSECTION A-A

B

A

B

A

F

F

SECTION F-F

G

G

SECTION G-G

MISC. NOTES:

1.

2.

4.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

18.

19.

20.

BD-604M

COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION

STANDARD

DESIGN & DETAILS

FOR BEAM BRIDGES

GRID REINFORCED CONCRETE BRIDGE DECK

STRINGER OR

GIRDER

THREADED BOLT TO BE UNCOATED A307M STEEL.

THE DESIGN AND SPACING OF THE SUPPORT ASSEMBLY.

MAIN BAR SPLICE AT PANEL ENDS

STRIP SEAL

A VARIETY OF CONSTRUCTION METHODS HAVE BEEN USED TO SET THE PROPER

ELEVATION OF A GRID REINFORCED DECK. SOME OF THE MORE COMMON METHODS

ALTERNATE DECK ELEVATION/HAUNCH FORMING METHODS MAY BE SUBMITTED BY

THE CONTRACTOR FOR ENGINEER'S APPROVAL.

5.

6.

PUBLICATION TITLED "GRID REINFORCED CONCRETE DECK ATTACHMENT", WHICH

IS HEREBY INCORPORATED INTO THESE STANDARDS. SEE "ELEVATION OPTIONS"

AND HAUNCH FORMING.

ARE DESCRIBED IN A BRIDGE GRID FLOORING MANUFACTURER'S ASSOCIATION (BGFMA)

DECK ATTACHMENT:

ELEVATION OPTIONS:

NOTES ON THIS SHEET FOR METHODS OF ACHIEVING PROPER DECK ELEVATION

ATTACH GRID REINFORCED CONCRETE BRIDGE DECKS TO BRIDGE FRAMING

ACCORDING TO AASHTO LRFD ARTICLE 9.7.1.2.

3. USE FULL DEPTH FILL FOR ALL GRID DESIGNS, INCLUDING HALF DEPTH FLOORS,

DECK ATTACHMENT TO BEAMS.

REGARDLESS OF ELEVATION OPTION USED, USE HEADED SHEAR STUDS FOR

ENGINEER.

WELDLESS SPLICE BETWEEN PANELS:

SEE NOTES 17 & 18

~

DESIGNER IS TO PROVIDE DESIGN FOR SHEAR STUDS. MAKE SHEAR STUD

SPACINGS CONSISTENT WITH GRID MAIN BAR SPACING.

FORM

PAN

SHEET METAL (TYP.)

SEE NOTES 9 THRU 17

FORM

PAN

17. OMIT CONCRETE FORM PAN OVER SUPPORT MEMBERS.

IN FIELD TO MISS ALL

SEE NOTE 17

FROM PAN

FROM PAN

AS REQUIRED

AS REQUIRED

REFER TO BC-767M FOR JOINT DETAILS AT SIDEWALKS, ETC.

REFER TO BC-751M FOR SCUPPER DETAILS.

NOTE 15

SEE

NOTE 15

SEE

CHIEF BRIDGE ENGINEER

RECOMMENDEDRECOMMENDED

STRIP SEAL

TYPICAL

TRIM PLATE

SEE DETAIL A

DETAIL A

SEE NOTE 4

SEE NOTE 4

SHEET 2 OF 4

BUREAU OF PROJECT DELIVERY

‰"

‰" †"

‰" 2" - 12"

•"THICK TRIM PLATE

#4 SPLICE BAR #4 SPLICE BAR

#4 SPLICE BAR

#4 SPLICE BAR

8"

8"

‰" ‰"

1" OVERLAP (TYP)

2" OVERLAP (TYP)

‰"

‰"

‰"

ELEMENTS (STRINGER, GIRDERS) WITH HEADED SHEAR STUDS. DESIGNED

‚" x 3" FILLET WELD SHALL BE USED AT EACH GRID I-BEAM (OR TEE)

IF GRID REINFORCED DECKS ARE TO BE WELDED TO SUPPORTS, A MINIMUM

1'-6"

#4 SPLICE BAR

#4 SPLICE BAR

DIRECTOR, BUR. OF PROJECT DELIVERY

APR.29, 2016APR.29, 2016

{

T

SOME GRID CROSS BARS MAY BE OMITTED TO FACILITATE REBAR PLACEMENT

2‚"

ƒ"

BARRIER REINFORCEMENT

MODIFIED MEDIAN BARRIER REINFORCEMENT

MODIFIED CONCRETE MEDIAN BARRIER DETAIL

#5

#5

ALTERNATE BARRIER IS APPROVED.

DIMENSIONS ACCORDINGLY IF

BARRIER HEIGHT OF 3'-6", ADJUST

DIMENSIONS INDICATED FOR TYPICAL

NOTE:

CONCRETE

WEIGHT

5" NORMAL-

CONCRETE

WEIGHT

9" LIGHT-

CONCRETE

WEIGHT

NORMAL

1'-2"

CONCRETE

WEIGHT

LIGHT

1'-5"

#5

#5

2'-8

…"

2'-5"

5ƒ"

3‚"

5…"

INSIDE RAD.= 3"

6"

2‚"

5ƒ"

4"5ƒ"

1'-8•

"

RA

D.

=3"

IN

SI

DE

4"

RAD.=3"

INSIDE

1'-10•

"

(STAGGERED )

BETWEEN LEFT HAND ANCHOR

HAND ANCHOR CENTERED

#5 @ 14" MAX. RIGHT

2" CL. (TYP)

#5 @ 14" MAX.

LEFT HAND ANCHOR

#5 @ 14" MAX.

R= 9‡"

2'-5•" FOR 5‰" GRID

2'-4•" FOR 4‚" GRID

3'-1" FOR 5‰" GRID

2'-11" FOR 4‚" GRID

42" BARRIER

50" BARRIER

R= 3" 10†"

1‡" - 42" BARRIER

3†" - 50" BARRIER

6"

6•"

11•

"

5•"

1'-8•"

BD-604M

COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION

STANDARD

DESIGN & DETAILS

FOR BEAM BRIDGES

GRID REINFORCED CONCRETE BRIDGE DECK

CHIEF BRIDGE ENGINEER

RECOMMENDEDRECOMMENDED SHEET 2 OF 4

BUREAU OF PROJECT DELIVERY

DIRECTOR, BUR. OF PROJECT DELIVERY

APR.29, 2016 APR.29, 2016

1

2

2

2

1

1

2

0

0

BEARING

BAR BAR SPACING

BEARINGNUMBER OF

SUPPLEMENTALSUPPLEMENTAL

SIZE OF

NORMAL WEIGHT CONCRETE

2

FILL

TYPE OF

CONCRETE

OVERALL DECK WEIGHT (STEEL AND CONCRETE)

LIGHT WEIGHT CONCRETE

MAXIMUM CANTILEVER

3

0

0

(IN) (IN) BARS (IN)

5.0

7.0

6.0

8.5

8.0

11.0

5.0

5.0

6.0

6.0

8.0

8.5

3.5

3.5

5.0

5.0

4.0

4.0

7.0

7.0

4.5

4.5 OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

N/A

N/A

N/A

1

2

2

2

1

1

6.5

6.5

8.0

8.0

11.0

11.0

4.5

4.5

6.0

6.0

7.5 OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

OVERFILL

FLUSH FILL

N/A

N/A

N/A

TABLE 1: FULL DEPTH FLOORING DESIGNS

TABLE 2: HALF DEPTH FLOORING DESIGNS

SPAN TABLES FOR "OVERFILL" BASED ON 1ƒ" THICKNESS OF CONCRETE ABOVE

BARS

4‚

4‚

5‰

5‰

5‰

5‰

5‰

5‰

5‰

5‰

8

6

8

10

10

6

8

6

8

6

8

†x†

1 x Š

1 x Š

1 x Š

1 x Š

1 x Š

1 x Š

69

48

83

62

81

60

96

75

94

73

97

76

96

75

94

73

100

76

97

76

95

74

59

42

70

53

68

51

81

64

79

62

65

80

63

78

61

85

68

82

65

80

63

82

60

43

57

40

56

39

63

46

59

42

57

40

70

49

67

46

66

45

72

51

69

48

67

46

7.51 x Š

1 x Š

1 x Š

1 x Š

1 x Š

1 x Š

5‰

5‰

5‰

5‰

5‰

5‰

10

10

6

8

6

8

•" SACRIFICIAL WEARING COURSE). FOR EXAMPLE, FOR A HALF DEPTH 5‰" GRID

EXAMPLE, FOR A HALF DEPTH 5‰" GRID, (2•" OF CONCRETE WITHIN THE GRID

4.0

4.0

4.0

3.5

4.5

5.0

4.5

3.5

4.0

3.5

4.0

2.5

3.0

2.0

5.0

3.5

3.0

6.5

5.0

4.0

4.5

4.0

3.5

5.0

4.0

3.5

5.0

3.5

3.0

6.5

5.0

4.0

NOTES ON TABLES:

1. COLUMN LABELED "CANTILEVER REBAR" INDICATES SIZE AND SPACING OF REBAR WHICH MUST BE

INSERTED FLUSH WITH TOP OF GRID INTO GRID REINFORCED DECK OVERHANG.

2. SPAN LENGTHS INDICATED ARE BASED BOTH ON HISTORICAL DATA AND FIELD TESTED INSTALLATIONS.

IT IS ACKNOWLEDGED THAT THERE ARE DISCREPANCIES WHEN SPAN LENGTH OF VARIOUS DECK

DESIGNS ARE COMPARED.

SPAN

UNLESS PROHIBITED DUE TO PROJECT DECK DEAD LOAD RESTRICTIONS, ALL GRID

CLEANING OF THE TOP OF THE FLUSH FILLED GRID SURFACE PRIOR TO PLACEMENT OF

SPECIAL MIX DESIGNS (MICRO-SILICA, LMC, FOR EXAMPLE) TO INSURE ADEQUATE

OF DECK, INCLUDING INTEGRAL OVERFILL OR PROPERLY BONDED RIGID OVERLAY (LESS

REGION, ALL GRID CROSS BARS PLUS ACTUAL CONCRETE THICKNESS ARE COUNTED. FOR

FOR COMPUTATION OF COMPOSITE SECTION PROPERTY OF GIRDER IN POSITIVE MOMENT

COATING OF UNDERSIDE IS REQUIRED.

SURFACES OF GRID IN CONTACT WITH CONCRETE NEED NOT BE COATED IF GRID IS TO

RECEIVE AN OVERLAY. IF THIS OPTION IS USED, APPLY AN APPROVED COATING SYSTEM

THE STEEL GRID MAY BE FABRICATED FROM UNCOATED WEATHERING STEEL, IN WHICH

NOTES:

4.

1.

2.

3.

3.

2.

1.

A RECOMMENDED METHOD OF CONSTRUCTING AN OVERLAY. WEIGHTS SHOWN IN MAXIMUM

TOP OF STEEL GRID BARS.

THE OVERLAY. THE SAME PRECAUTIONS APPLIES FOR ANY SPECIAL POLYMER OVERLAY.

680, 1080.3(e), AND AS DIRECTED BY THE ENGINEER.

TO THE UNDERSIDE AND EXPOSED SURFACES OF THE GRID. FOR EXAMPLE THE UNDERSIDE

OF THE GRID COULD BE PAINTED WITH THE SAME SYSTEM USED TO COAT BRIDGE

SUPERSTRUCTURE.

CASE THE CONCRETE FORM PANS TO BE MADE FROM PRE-GALVANIZED SHEETS MEETING

DECK OVERLAY:

REINFORCED CONCRETE BRIDGE DECKS ARE TO RECEIVE AN OVERLAY WHEN INITIALLY

INSTALLED. IF A PROJECT REQUIRES A FLUSH FILLED DECK, COAT ALL GRID SURFACES

WITH AN APPROVED PAINT SYSTEM, OR HOT DIP GALVANIZE THEM.

EXERCISE GREAT CARE WHEN USING SEPARATELY POURED RIGID OVERLAYS OF

CONCRETE DECKS", FOR ADDITIONAL GUIDANCE.

REFER TO BRIDGE GRID FLOORING MANUFACTURER'S ASSOCIATION (BGFMA) PUBLICATION

"STANDARD SHOP PRACTICES AND FABRICATION TOLERANCES FOR GRID REINFORCED

T = OVERALL DEPTH DETERMINING EFFECTIVE WIDTH OF FLANGE APPLY, IN WHICH

FOR ADDITIONAL CORROSION PROTECTION, A COATING SYSTEM MAY BE APPLIED TO ALL

GRID SURFACES (INCLUDING THOSE IN CONTACT WITH THE CONCRETE). FOR EXAMPLE,

STEEL GRID PANELS MAY BE HOT DIP GALVANIZED, IN WHICH CASE NO ADDITIONAL

ASTM A653, G-90.

BITUMINOUS OVERLAYS MAY BE APPLICABLE IN ACCORDANCE WITH PUB 408, SECTION 420,

AND 3ƒ" (4ƒ" LESS •" SACRIFICIAL) OF CONCRETE ACROSS THE EFFECTIVE WIDTH.

AND A 1ƒ" INTEGRAL OVERFILL OR 4‚" TOTAL), DESIGN TO USE ALL CROSS BARS

EFFECTIVE FLANGE WIDTH:

(SEE NOTE 3)

(FT)

(SEE NOTE 2)

MAXIMUM SPANS FOR INFINITE FATIGUE LIFE

(LBS/FT ) 2(LBS/FT )

AND SPACING

(SEE NOTE 4)

PL-3 CRASH LOAD (FT)

STRENGTHENED TO RESIST

CAPACITY OF DECK

BASED ON THE

MAXIMUM OVERHANG

(FT)

INTERIOR SPAN

BASED ON 0.625 x

MAXIMUM OVERHANG

BEARING

BAR BAR SPACING

BEARINGNUMBER OF

SUPPLEMENTALSUPPLEMENTAL

SIZE OF

NORMAL WEIGHT CONCRETE

2

FILL

TYPE OF

CONCRETE

OVERALL DECK WEIGHT (STEEL AND CONCRETE)

LIGHT WEIGHT CONCRETE

MAXIMUM

(IN) (IN) BARS (IN)BARS

SPAN

(SEE NOTE 3)

(FT)

(SEE NOTE 2)(LBS/FT ) 2(LBS/FT ) (SEE NOTE 4)

PL-3 CRASH LOAD (FT)

STRENGTHENED TO RESIST

CAPACITY OF DECK

BASED ON THE

MAXIMUM OVERHANG

(FT)

INTERIOR SPAN

BASED ON 0.625 x

MAXIMUM OVERHANG

4. REFER TO LRFD AASHTO SECTION 13.2 FOR DEFINITION OF PL-3 LOADING.

GRID SURFACES COATING:

INTEGRAL OVERLAYS (POURED MONOLITHICALLY WITH CONCRETE PLACED INTO GRID)IS

TO BE IN ACCORDANCE WITH AASHTO SPECIFICATIONS. STANDARD AASHTO CRITERIA FOR

(SEE NOTE 1)

REBAR SIZE

CANTILEVER

AND SPACING

(SEE NOTE 1)

REBAR SIZE

#4 @ 6"

#5 @ 4"

#4 @ 6"

#4 @ 8"

#4 @ 8"

#5 @ 10"

#4 @ 10"

DESIGN GRIDS TO BEHAVE COMPOSITE WITH SUPPORTS; SHEAR STUD DESIGN IS

WITH A 1ƒ" OVERFILL, T = 6‹" (5‰" + 1ƒ" -1/2 ").

PRESENCE OF CONCRETE IS NEGLECTED IN NEGATIVE MOMENT REGION, AND FABRICATION

NOTCHES IN CROSS BARS ARE DEDUCTED.

#4 @ 8"

#5 @ 10"

#4 @ 10"

3. ALL LISTED DESIGNS REQUIRE THE USE OF STEEL GRADE 50 EXCEPT DECK DESIGN 5‰"

I-BEAM @ 6" c/c WITH TWO (2) SUPPLEMENTARY BARS WHICH REQUIRES THE USE OF GRADE 36.

BD-604M

COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION

DESIGN & DETAILS

FOR BEAM BRIDGES

GRID REINFORCED CONCRETE BRIDGE DECK

CHIEF BRIDGE ENGINEER

RECOMMENDEDRECOMMENDED SHEET 4 OF 4

BUREAU OF PROJECT DELIVERY

STANDARD

DIRECTOR, BUR. OF PROJECT DELIVERY

APR. 29,2016 APR.29, 2016