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COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION
CHIEF BRIDGE ENGINEER
RECOMMENDEDRECOMMENDED
BUREAU OF PROJECT DELIVERY
ACTING DIR, BUR. OF PROJECT DELIVERY
STANDARD
CENTER-MOUNT SIGN STRUCTURES
GENERAL NOTES
DESIGN CRITERIA AND
BD-649M
SHEET 1 OF 6NOV. 26, 2013 NOV. 26, 2013
DYNAMIC MESSAGE SIGNS
REFERENCE DRAWINGS
CLASSIFICATION OF EARTHWORK FOR STRUCTURES
TYPE 2 STRONG POST GUIDE RAIL
TYPE 2 WEAK POST GUIDE RAIL
BARRIER PLACEMENT AT OBSTRUCTIONS
TYPE 2 WEAK POST MEDIAN BARRIER
BC-736M
BC-741M
RC-11M
RC-52M
RC-53M
RC-54M
RC-55M
REINFORCEMENT BAR FABRICATION DETAILS
RC-58M SINGLE FACE CONCRETE BARRIER PLACEMENT AT MEDIAN PIERS
STRUCTURES STRUT LENGTHS UP TO 40'
OVERHEAD SIGN STRUCTURES - CANTILEVER AND CENTER-MOUNT
ITS DEVICES - GENERALITS-1201
ITS-1230 GENERAL NOTES FOR CANTILEVER STRUCTURES
GENERAL NOTES:
INFORMATIONAL NOTES:
CONSTRUCTION GENERAL NOTES:
FOR DETAILS NOT SHOWN SEE BC-741M.
WARRANTS FOR INSTALLATION.
USE OF GUIDE RAIL AND/OR CONCRETE BARRIER SHALL MEET APPLICABLE PENNDOT
CHAPTER 12 GUIDE RAIL, MEDIAN BARRIER AND ROADSIDE SAFETY DEVICES.
PROVIDE CRASHWORTHY BARRIER IN ACCORDANCE WITH PENNDOT PUB 13M (DM-2).
CRASHWORTHY BARRIER, SEE TABLE A, BC-741M SHEET 2.
ALL DMS SUPPORTS LOCATED WITHIN THE CLEAR ZONE MUST BE SHIELDED WITH A
CONTRACT DRAWINGS.
USE THESE STANDARDS AS A BASIS FOR THE PREPARATION OF STRUCTURE LAYOUTS AND
READ THESE NOTES BEFORE USING THESE STANDARDS.
ALL DIMENSIONS ARE IN U.S. CUSTOMARY UNITS.
PROVIDE 3-INCH CONCRETE COVER ON REINFORCEMENT BARS, EXCEPT AS NOTED.
USE CLASS A CEMENT CONCRETE f'c = 3000 PSI IN PEDESTALS, FOOTINGS AND CAISSONS.
PROVIDE GRADE 60 REINFORCING STEEL BARS THAT MEET THE REQUIREMENTS OF ASTM A615
FOR CONCRETE REINFORCEMENT. DO NOT WELD REINFORCING STEEL BARS.
RAKE-FINISH ALL HORIZONTAL CONSTRUCTION JOINTS, EXCEPT AS INDICATED.
CHAMFER EXPOSED CONCRETE EDGES 1 INCH BY 1 INCH.
ALL DIMENSIONS SHOWN ARE HORIZONTAL, EXCEPT AS NOTED.
DIMENSIONS ARE BASED ON A NORMAL TEMPERATURE OF 68 DEGREES F.
SPREAD FOOTINGS OR CAISSONS MAY BE ORDERED BY THE ENGINEER TO BE AT ANY ELEVATION
OR OF ANY DIMENSIONS NECESSARY TO PROVIDE A PROPER FOUNDATION.
GALVANIZE ALL STRUCTURAL STEEL BOLTS, NUTS & WASHERS IN ACCORDANCE WITH PENNDOT
PUB 408 UNLESS STAINLESS STEEL OR OTHERWISE INDICATED.
ALL BOLT HOLES SHALL BE DRILLED.
PROVIDE BOLT HOLES ˆ" LARGER THAN BOLT DIAMETER.
STEEL MEMBER COMPONENTS REQUIRING CHARPY V-NOTCH TESTING ARE DESIGNATED ON THE
PLANS BY (CVN), PROVIDE STEEL CONFORMING TO THE CVN REQUIREMENTS FOR ZONE 2, NON
FRACTURE CRITICAL AS GIVEN IN THE AASHTO MATERIAL SPECIFICATIONS.
PIPE DIAMETERS SHOWN UP TO AND INCLUDING 12 INCHES ARE NOMINAL DIAMETERS.
PIPE DIAMETERS SHOWN FROM 14 INCHES AND UP ARE ACTUAL DIAMETERS.
PROVIDE A CERTIFICATION LETTER, SIGNED AND SEALED BY A PROFESSIONAL ENGINEER
REGISTERED IN THE COMMONWEALTH OF PENNSYLVANIA, CERTIFYING THAT THE INTERNAL
STRUCTURE OF THE DMS AND THE CONNECTION TO THE SIGN STRUCTURE MEET THE REQUIREMENT
OF THE AASHTO "STANDARD SPECIFICATIONS FOR STRUCTURAL SUPPORTS FOR HIGHWAY SIGNS,
LUMINAIRES AND TRAFFIC SIGNALS AS AMENDED BY PENNDOT." THE CERTIFICATION LETTER
SHALL BE PREPARED BY THE DMS MANUFACTURER'S PROFESSIONAL ENGINEER AND SUBMITTED BY
THE CONTRACTOR.
ONE TEST BORING SHALL BE PROVIDED AT EACH DMS FOUNDATION LOCATION.16.
15.
14.
13.
12.
11.
10.
9.
8.
7.
6.
5.
4.
3.
2.
1.
ALL FILLET WELDS SHOWN ARE MINIMUM SIZE UNLESS NOTED OTHERWISE.
EDITION; PENNDOT DESIGN MANUAL - PART 4, MAY 2012 EDITION.
(UNLESS NOTED OTHERWISE); AASHTO STANDARD SPECIFICATIONS FOR HIGHWAY BRIDGES, 17TH
LUMINAIRES AND TRAFFIC SIGNALS, 4TH EDITION, 2001, INCLUDING INTERIMS THROUGH 2006
AASHTO STANDARD SPECIFICATIONS FOR STRUCTURAL SUPPORTS FOR HIGHWAY SIGNS,
DESIGN SPECIFICATIONS:
AND TRAFFIC SIGNALS (2005).
MAINTAINENACE, AND REPAIR OF STRUCTURAL SUPPORTS FOR HIGHWAY SIGNS, LUMINARIES,
U-BOLT INSTALLATION: PER FHWA PUB GUIDELINES FOR THE INSTALLATION, INSPECTION,
AND PLATES, ANCHOR BOLTS, BOLTS: PER PENNDOT PUB 408 SECTION 1230.2(k).
PIPE BRACING, ANGLES, SHAPES,
PIPE COLUMNS & PIPE CHORDS,
PROVIDE STRUCTURAL STEEL CONFORMING TO THE FOLLOWING:
AASHTO/AWS D1.1/D1.1M:2008 FOR WELDING NOT COVERED IN AASHTO/AWS D1.5M/D1.5:2002
FOR STRUCTURAL SUPPORTS FOR HIGHWAY SIGNS, LUMINAIRES AND TRAFFIC SIGNALS". USE
WELDING CODE AND CONTRACT SPECIAL PROVISIONS, AND AASHTO "STANDARD SPECIFICATIONS
OF THE PENNDOT PUB 408, (LET DATE EDITION), AASHTO/AWS D1.5M/D1.5:2002-BRIDGE
PROVIDE MATERIALS AND WORKMANSHIP IN ACCORDANCE WITH THE CURRENT VERSIONS
MATERIALS AND WORKMANSHIP:
ALLOWABLE ANCHOR BOLT STRESSES AASHTO 2001 SIGN SPECS. 5.17
BOLT DESIGN CRITERIA AASHTO 2001 SIGN SPECS. 5.16
COMBINED BOLT SHEAR AND TENSION 10.32.3.3.3
BOLT PRYING ACTION 10.32.3.3.2
SLIP-CRITICAL BOLT ALLOWABLE 10.32.3.2.1
ALLOWABLE BOLT STRESSES TABLE 10.32.3B
BOLT CRITERIA AASHTO HIGHWAY BRIDGES (U.N.O.)
COLUMN DESIGN (PEDESTALS) 8.15.4
TORSION ACI SECTION A.7.3*
FOOTING STABILITY REQUIREMENTS DM4 D5.5.5
DISTRIBUTION OF REINFORCEMENT 4.4.11.2.2
PRESSURES FOR ECCENTRICALLY LOADED FOOTINGS FIG. 4.4.7.1.1.1C
MINIMUM CONCRETE COVER DM4 D8.22.1*
SPACING LIMITS FOR REINFORCEMENT 8.21
MINIMUM REINF. OF FLEXURAL MEMBERS 8.17.1
SLENDERNESS OF COLUMNS 8.16.5.2
ALLOWABLE SHEAR STRESS 8.15.5.6.4
SHEAR STRESS IN FOOTINGS 8.15.5.6.2
SHEAR CAPACITY OF FOOTINGS 8.15.5.6.1
REINFORCEMENT TENSILE STRESS 8.15.2.2
ALLOWABLE BEARING STRESS 8.15.2.1.3
CONCRETE CRITERIA AASHTO HIGHWAY BRIDGES (U.N.O.)
GROUP LOADS AASHTO 2001 SIGN SPECS. 3.4
F
d
DESIGN CRITERIA FOR PENNDOT DMS STRUCTURES
(STRENGTH DESIGN AND FATIGUE DESIGN)
WIND DRAG COEFFICIENT C = 1.7 FOR DMS
DMS SIZE AND DEAD LOAD PER SUPPLIER
WIND AND 30% GUST FACTOR
EQ. C-1, WITH 80 MPH
WIND LOAD APPENDIX C, SECTION C.3,
ICE LOAD 3.7
LIVE LOAD (CATWALKS) 3.6
DEAD LOAD 3.5
LOADING AASHTO 2001 SIGN SPECS.(U.N.O.)
LEGEND*
DMS: DYNAMIC MESSAGE SIGN
CVN: CHARPY V-NOTCH.
FOR STRUCTURAL CONCRETE WITH COMMENTARY (ACI 318M-99).
ACI: AMERICAN CONCRETE INSTITUTE - METRIC BUILDING CODE REQUIREMENTS
U.N.O.: UNLESS NOTED OTHERWISE
PART 4, STRUCTURES, MAY 2012 EDITION
DM4: PENNSYLVANIA DEPARTMENT OF TRANSPORTATION, DESIGN MANUAL
SPECIFICATIONS FOR HIGHWAY BRIDGES, 17TH EDITION
TRANSPORTATION OFFICIALS, STANDARD
AASHTO HIGHWAY BRIDGES: AMERICAN ASSOCIATION OF STATE HIGHWAY AND
INCLUDING INTERIMS THRU 2006
LUMINAIRES AND TRAFFIC SIGNALS, 4TH EDITION,
FOR STRUCTURAL SUPPORTS FOR HIGHWAY SIGNS,
TRANSPORTATION OFFICIALS, STANDARD SPECIFICATIONS
AASHTO 2001 SIGN SPEC: AMERICAN ASSOCIATION OF STATE HIGHWAY AND
UNIT WEIGHT OF SOIL 100 POUNDS PER CUBIC FOOT
MINIMUM AREA IN BEARING 95%
TABLES IN THIS STANDARD)
FOOTINGS FOLLOWING THE DESIGN
MAXIMUM DESIGN PRESSURE 1.5 TONS PER SQUARE FOOT (FOR
SPREAD FOOTINGS: DM4 SEC.10.6
COHESION 0 KIPS PER SQUARE FOOT
UNIT WEIGHT OF SOIL 100 POUNDS PER CUBIC FOOT
MODULUS OF SUBGRADE REACTION 10.0 POUNDS PER CUBIC INCH
MAXIMUM DESIGN LATERAL DISPLACEMENT 0.5"
MAXIMUM DESIGN PRESSURE 1.5 TONS PER SQUARE FOOT
DRILLED SHAFTS (CAISSONS): DM4 SEC.D10.8.3.8, PENNDOT COM624P COMPUTER PROGRAM OR L-PILE
STEEL CRITERIA AASHTO 2001 SIGN SPECS. (U.N.O.)
STRENGTH CRITERIA
SECTION PROPERTIES FOR TUBULAR SHAPES APPENDIX B, TABLE B-1
MAXIMUM STRESSES IN TUBULAR SHAPES APPENDIX B, TABLE B-2
ALLOWABLE STRESSES FOR TUBULAR SHAPES 5.6 (TABLE 5-3) & 5.11
ALLOWABLE STRESSES FOR DMS SUPPORTS 5.12
ALLOWABLE STRESSES FOR BASE PLATES 5.8
ALLOWABLE STRESSES FOR COMBINED STEEL STRESS 5.12
ALLOWABLE STRESSES FOR STRUCTURAL STEEL SECTION 5
FATIGUE CRITERIA
FATIGUE REQUIREMENTS (FATIGUE CATEGORY I) SECTION 11
FATIGUE IMPORTANCE FACTOR ( I = 1) 11.6
GALLOPING 11.7.1
NATURAL WIND GUST 11.7.3
TRUCK-INDUCED GUST 11.7.4
SERVICEABILITY CRITERIA
ALLOWABLE DEFLECTION 10.4
COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION
CHIEF BRIDGE ENGINEER
RECOMMENDEDRECOMMENDED
BUREAU OF PROJECT DELIVERY
ACTING DIR, BUR. OF PROJECT DELIVERY
STANDARD
CENTER-MOUNT SIGN STRUCTURES
BD-649M
NOV. 26, 2013 NOV. 26, 2013
DYNAMIC MESSAGE SIGNS
AND FABRICATOR
NOTES TO DESIGNER
SHEET 2 OF 6
NOTES TO DESIGNER
NOTES TO FABRICATOR
1. PROVIDE SHOP DRAWINGS IN ACCORDANCE WITH PUBLICATION 408, SECTION 105.02(D) AND CONTRACT SPECIAL PROVISIONS.
2. THE FOLLOWING INFORMATION MUST BE SHOWN ON THE SHOP DRAWINGS:
GENERAL NOTES AND CONSTRUCTION NOTES, SEE SHEET 1 (AS APPLICABLE)
FABRICATION NOTES
TRANSPORTATION NOTES
LIFTING AND ERECTION NOTES
INSTALLATION NOTES
PROVIDE A TABLE OF QUANTITIES INCLUDING:
WEIGHT OF STEEL SIGN STRUCTURE
CLASS 3 EXCAVATION
CLASS A CEMENT CONCRETE
POUNDS OF REINFORCEMENT BARS
FRONT AND SIDE ELEVATIONS WITH THE MINIMUM INFORMATION LISTED BELOW:
COLUMN SIZE
DMS HEIGHT
STRUT SIZE
STRUT SPACING
ACTUAL VERTICAL CLEAR
ACTUAL OFFSET FROM EDGE OF SHOULDER
FOOTING ELEVATION
DETAILS MAY BE REQUIRED TO MEET CABLE BENDING RADIUS AND PROJECT SPECIFIC REQUIREMENTS.
CAP SIZE AND LOCATIONS ON SHOP DRAWINGS BASED ON SITE SPECIFIC REQUIREMENTS. ALTERNATE
7. PROVIDE HAND HOLE, WEATHERPROOF ENCLOSURE, AND STANDARD WEATHERPROOF SERVICE ENTRANCE
6. INDICATE THE SUPPLIER FOR CATWALK GRATING ON THE SHOP DRAWINGS.
5. TELESCOPING (SLIP-FIT) FIELD SPLICES FOR DMS SUPPORT STRUCTURES ARE PROHIBITED.
4. ALUMINUM DMS SUPPORT STRUCTURES ARE PROHIBITED.
ALLOWABLE DEFLECTION
DEFLECTION
LOAD CASE
CONTROLLING STATE FOR LATERAL LOAD
RESISTANCE
FACTORED LOAD
LOAD CASE
CONTROLING LIMIT STATE FOR AXIAL LOAD
3. IF AN ALTERNATE CAISSON FOUNDATION IS TO BE USED, THE DRAWINGS MUST INCLUDE THE FOLLOWING:
IDENTIFY ALL WELDS BY SIZE AND TYPE
SIZE AND TYPE OF PIPE CAPS
DESIGN WEIGHT OF DMS
DESIGN ECCENTRICITY
DESIGN HEIGHT
DMS AREA
DMS HEIGHT AND LENGTH
LATITUDE AND LONGITUDE OR STATION AND OFFSET OR THE CENTER OF THE COLUMN
ECCENTRICITY
SIZE, NUMBER AND EMBEDMENT OF ANCHOR BOLTS
TOP OF PEDESTAL ELEVATION
PEDESTAL HEIGHT
PEDESTAL LENGTH AND WIDTH
FOOTING LENGTH AND WIDTH
BAR NUMBER AND SIZE, AND ROCK SOCKET REQUIREMENTS AS REQUIRED.
CAISSON ELEVATION, EMBEDMENT DEPTH, TOTAL CAISSON LENGTH, VERTICAL AND TIE REINFORCEMENT
13.FOR CAISSON ALTERNATIVE, PROVIDE CAISSON DIAMETER, TOP OF CAISSON ELEVATION, BOTTOM OF
MINIMUM VERTICAL CLEARANCE.
PLATFORM LOCATIONS ON CONTRACT DRAWINGS BASED ON SITE SPECIFIC REQUIREMENTS. MAINTAIN
PLATFORMS ARE LOCATED ON ONE END ONLY AT EACH DMS. IDENTIFY CATWALK AND WALK-IN ACCESS
IS LOCATED ON THE FRONT FACE OF EACH SIGN ON A FRONT AND BACK DMS. WALK-IN ACCESS
12.ENSURE CATWALK CAN BE ACCESSIBLE FROM SHOULDER WHEN CONDITIONS PERMIT. CATWALK
STRUCTURES CARRYING NON-STANDARD DMS.
ONLY; DESIGN COMPUTATION MUST BE SUBMITTED FOR ALL COMPONENTS OF SUPPORT
THIS STANDARD, THE BD-641M AND BD-645M STANDARDS MAY BE USED FOR PRELIMINARY MEMBER SIZES
PENNSYLVANIA AND SUBMITTED TO THE CHIEF BRIDGE ENGINEER FOR REVIEW AND APPROVAL.
MUST BE DESIGNED BY A PROFESSIONAL ENGINEER REGISTERED IN THE STATE OF
11.SUPPORT SIGN STRUCTURES INTENDED TO CARRY DMS NOT COVERED IN THESE STANDARDS
SUBMISSION REQUESTING APPROVAL MUST BE MADE TO THE CHIEF BRIDGE ENGINEER.
10.IF NEEDED DETAILS ARE NOT FOUND IN THE DMS CENTER-MOUNT STRUCTURE STANDARDS OR BC-741M A SPECIAL
OR BARRIER AND INSURE IT IS IN ACCORDANCE WITH BC-741M, SEE SHEET 2 TABLE A.
9. THE DESIGNER MUST DETAIL THE LEAST DISTANCE FROM EDGE OF PEDESTAL TO REAR OF GUIDERAIL POST
8. IDENTIFY THE PRESENCE OF GUIDERAIL, BARRIER OR PLACEMENT OUTSIDE THE CLEAR ZONE.
THE DMS CENTER-MOUNT STRUCTURE STANDARDS, BD-641M OR ITS STANDARDS.
7. DESIGN COMPUTATIONS AND DETAILS ARE REQUIRED FOR ANY PORTION OF THE STRUCTURE NOT TAKEN FROM
6. IDENTIFY IF A LADDER IS REQUIRED AND LOCATE.
5. IDENTIFY IF A SEPARATE DMS CABINET IS REQUIRED AND LOCATE.
4. IDENTIFY IF A MAINTAINER PAD IS REQUIRED AND LOCATE.
3. IDENTIFY IF AN ENCLOSURE IS REQUIRED AND SPECIFY TYPE.
MINIMUM VERTICAL CLEARANCE PROJECTED TO EDGE OF PAVEMENT
BOTTOM OF FOOTING ELEVATION
TOP OF PEDESTAL ELEVATION
IF THE STRUCTURE IS TO SUPPORT A BACK TO BACK MOUNT
ACCESS CONFIGURATION (FRONT ACCESS CATWALK OR WALK-IN)
DESIGN WEIGHT OF DMS
DESIGN ECCENTRICITY
DESIGN HEIGHT
DMS AREA
DMS HEIGHT AND LENGTH
LATITUDE AND LONGITUDE OR STATION AND OFFSET OF THE CENTER OF THE POLE
2. THE FOLLOWING INFORMATION MUST BE SHOWN ON THE CONTRACT DRAWINGS (IF APPLICABLE):
1. PREPARE CONTRACT DRAWING IN ACCORDANCE WITH PENNDOT DESIGN MANUAL PART 4, AND THESE STANDARDS.
SEE PLAN SHEET FOR
SIGN STRUCTURE LOCATION
LUMP SUM ITEM NO.
ITEMS SHOWN FOR INFORMATION ONLY, INCLUDED IN
CO
LU
MN
HEI
GH
T
=
BASEPLATE
TOP OF
PEDESTAL
TOP OF
FRONT ELEVATION SIDE ELEVATION
CENTER-MOUNT DMS SUPPORT STRUCTURE
DMS LENGTH =
*
*
EL. =
TOP OF PEDESTAL
*
*
COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION
CHIEF BRIDGE ENGINEER
RECOMMENDEDRECOMMENDED
BUREAU OF PROJECT DELIVERY
ACTING DIR, BUR. OF PROJECT DELIVERY
STANDARD
CENTER-MOUNT SIGN STRUCTURES
BD-649M
NOV. 26, 2013 NOV. 26, 2013
DYNAMIC MESSAGE SIGNS
( ) PARENTHESES.
DESIGN REQUIREMENTS. DESIGNER MUST PROVIDE INFORMATION IN
PLACE THE FOLLOWING NOTES ON CONTRACT DRAWINGS BASED ON
EL. =
BOTTOM OF FOOTING
SEE BC-741M FOR CLEARANCE REQUIREMENTS.
� COLUMN
STRUTS
MAX.
9'-3"
(IF REQUIRED)
ACCESS PLATFORM
WALK-IN (ONE END ONLY)
3'-6"
*
*
ADEQUACY FOR FILL HEIGHTS <10'-0".
FILL HEIGHT. DESIGNER MUST CHECK
SHEETS 4 AND 5 ARE BASED ON 10'-0"
NOTE: FOOTING DESIGN INFORMATION ON
SHOWN FOR CLARITY
LADDER (IF REQUIRED) NOT
(FRONT/BACK CATWALK SIMILAR)
WALK-IN ACCESS PLATFORM SHOWN
WITH WALK-IN ACCESS PLATFORM OR CATWALK
SEE ITS-1201M SHEET 7 FOR DETAILS.
CONCRETE MAINTAINER PAD (IF REQUIRED).
SEE ITS-1201M SHEET 3.
FOR GROUND MOUNTED ENCLOSURES
ITS-1201M SHEET 1 OR SHEET 2)
(IF REQUIRED). (SEE
WEATHERPROOF ENCLOSURE
SEE SHEETS 4 AND 5
REQUIREMENTS AND BC-741M DETAILS.
SHEETS 4 AND 5 FOR REINFORCEMENT
FOOTING TYPE AND SIZE. SEE
SHOWN FOR CLARITY
LADDER (IF REQUIRED) NOT
(WALK-IN ACCESS PLATFORM SHOWN )
FRONT/BACK CATWALK SIMILAR
DETAILS.
REINFORCEMENT REQUIREMENTS AND
4 AND 5 AND BC-741M FOR ADDITIONAL
SIZE) PEDESTAL"P" BARS. SEE SHEETS
(E)x(E) PEDESTAL WITH (COUNT)-(BAR
STAINLESS STEEL HARDWARE.
SCREEN IS TO BE REMOVABLE AND ATTACHED TO BASEPLATE WITH
IS TO PREVENT ENTRY OF RODENTS WHILE PERMITTING DRAINAGE.
SCREEN, •" BY •" MESH AND 0.063" DIAMETER WIRES. SCREEN
SEAL BASE PLATE TO FOUNDATION GAP WITH GALVANIZED STEEL
AND STANDARD WEATHERPROOF SERVICE ENTRANCE CAP.
INCLUDING HAND HOLE, WEATHERPROOF ENCLOSURE,
SEE BC-741M FOR ADDITIONAL FABRICATION DETAILS
BC-741M FOR FABRICATION DETAILS.
STRUT SIZE IS (O.D.) x (WALL THK.). SEE
BC-741M FOR FABRICATION DETAILS.
COLUMN SIZE IS (O.D.) x (WALL THK.). SEE
REQUIREMENTS AND BC-741M FOR DETAILS.
FOOTING TYPE (SIZE). SEE SHEETS 4 AND 5 FOR REINFORCEMENT
REQUIREMENTS AND DETAILS.
"P" BARS. SEE BC-741M FOR ADDITIONAL REINFORCEMENT
(E)x(E) PEDESTAL WITH (COUNT) - (BAR SIZE) PEDESTAL
ACCORDANCE WITH SHEET 6.
PROVIDE DMS CONNECTION DETAILS ON THE CONTRACT DRAWINGS IN
PROVIDE GENERAL NOTES FROM SHEET 1 ON THE CONTRACT DRAWINGS.
BAR NUMBER AND SIZE, AND ROCK SOCKET REQUIREMENTS AS REQUIRED.
DEPTH, TOTAL CAISSON LENGTH, VERTICAL AND TIE REINFORCEMENT
CAISSON ELEVATION, BOTTOM OF CAISSON ELEVATION, EMBEDMENT
FOR CAISSON ALTERNATIVE, PROVIDE CAISSON DIAMETER, TOP OF
REQUIREMENTS. MAINTAIN MINIMUM VERTICAL CLEARANCE.
LOCATIONS ON CONTRACT DRAWINGS BASED ON SITE SPECIFIC
ONE END ONLY AT EACH DMS. IDENTIFY CATWALK AND WALK-IN ACCESS
A FRONT AND BACK DMS. WALK-IN ACCESS PLATFORMS ARE LOCATED ON
PERMIT. CATWALK IS LOCATED ON THE FRONT FACE OF EACH SIGN ON
ENSURE CATWALK CAN BE ACCESSIBLE FROM SHOULDER WHEN CONDITIONS
INFORMATION WITH .
CONFIGURATION AS REQUIRED. SAMPLE INDICATES MINIMUM REQUIRED
PROVIDE DIMENSIONS AND ELEVATIONS BASED ON ACTUAL STRUCTURE
RADIUS AND PROJECT SPECIFIC REQUIREMENTS.
DETAILS FROM BC-741M MAY BE REQUIRED TO MEET CABLE BENDING
CONTRACT PLANS BASED ON SITE SPECIFIC REQUIREMENTS. ALTERNATE
WEATHERPROOF SERVICE ENTRANCE CAP SIZE AND LOCATIONS ON
PROVIDE HAND HOLE, WEATHERPROOF ENCLOSURE, AND STANDARD
17'-6" MIN.
MIN. VERT. CLR=
ACTUAL VERT. CLR. =
2'-0"
MIN.
SEE SHEETS 4 AND 5
=
ECCENTRICITY
PAVEMENT
EDGE OF
� COLUMN
COLUMN
OF GRAVITY
DMS CENTER
� COLUMN DMS HEIGHT (DY) =
CONDUIT
SERVICE ENTRANCE CAP
STANDARD WEATHERPROOF
FABRICATION DETAILS
SEE BC-741M FOR
(O.D.) X (WALL THK.)
COLUMN SIZE IS
EL. =
� STRUCTURE & DMS
EL. =
CLR. TOP OF ROADWAY
PT. OF MIN. VERT.
FABRICATION DETAILS
SEE BC-741M FOR
(O.D.) X (WALL THK.)
STRUT SIZE IS
DE
SI
GN
HEI
GH
T (
H)
CLEARANCEVARIABLEPAVEMENT
DESIGN LENGTH (DX)
HEIGHT=
PEDESTAL
FOOTING WIDTH (G)
FOOTING LENGTH (F)
9'-10 1/8 "
6"
SHEET 3 OF 6
CENTER MOUNT STRUCTURES
SAMPLE CONTRACT PLAN FOR
� STRUCTURE & DMS
EL.
1+400
DESIGN WEIGHT OF DMS (W)=
DMS ECCENTRICITY =
DESIGN HEIGHT (H)=
DESIGN DMS HEIGHT (DY)=
DESIGN DMS LENGTH (DX)=
DESIGN DMS AREA (A)=
LONGITUDE
OR
LATITUDE
STATION OFFSET
OR STATION AND OFFSET.
PROVIDE EITHER LATITUDE/LONGITUDE
SIGN STRUCTURE
STA.
TABLE OF ESTIMATED QUANTITIES
ITEM NO. ITEM UNIT QUANTITY
0000-0000
0000-0000
0000-0000
STEEL SIGN STRUCTURE
CLASS 3 EXCAVATION
CLASS A CEMENT CONCRETE
REINFORCEMENT BARS
DESIGN CRITERIA
00000000
LBS
LBS
CY
CY
=
STRUT SPACING
NOTES:
B
BB
B
5"
5"
5"
5"
DETAIL A
DETAIL B
BAR TYPES
"M" & "N"
3'-9"
EXCAVATION.
SEE STANDARD DRAWING RC-11M FOR LIMITS OF CLASS 3
BAR FABRICATION DETAILS.
SEE STANDARD DRAWING BC-736M FOR REINFORCEMENT
ADEQUACY FOR FILL HEIGHTS < 10 FT.
ON 10 FOOT FILL HEIGHT. FABRICATOR MUST CHECK
FOOTING DESIGN INFORMATION ON THIS SHEET BASED
OR 180° HOOK LENGTHS.
LENGTH FOR "L" AND "T" BARS DOES NOT INCLUDE 90°
PROVIDE 90° OR 180° HOOKS ON ALL "L" AND "T" BARS.
LENGTH = 4'-7"
FRONT ACCESS
DESIGN TABLES
TABLE 1: SINGLE SIGN FRONT DMS PANEL WITH FRONT ACCESS CATWALK
A
3" CL.
K 1'-8"
BAR TYPE "P"
16 REQUIRED PER PEDESTAL
LENGTH = K + 3'-0"
A= 1'-7"
BAR TYPE "X"
COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION
CHIEF BRIDGE ENGINEER
RECOMMENDEDRECOMMENDED
BUREAU OF PROJECT DELIVERY
ACTING DIR, BUR. OF PROJECT DELIVERY
STANDARD
CENTER-MOUNT SIGN STRUCTURES
BD-649M
NOV. 26, 2013 NOV. 26, 2013
DYNAMIC MESSAGE SIGNS
B B
ft sf ft ft ft lbs ft No. No. No. No.
50 10 5 2 550 2.21 0.237"4"x 20" x 0.375" 13'-10" 3'-3" 10'-4" 7'-0" 10'-0" 6 5 8 4 8
100 17.5 5.71 2 1030 2.29 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 7'-0" 10'-0" 6 5 8 4 8
16150 20 7.5 1.17 1800 1.88 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 8'-0" 12'-0" 5 9 4 9
200 25 8 2 2300 2.46 0.365" x10" 20" x 0.375" 13'-10" 3'-3" 10'-4" 8'-0" 14'-0" 12 6 5 10 4 10
250 31.25 8 2 2105 2.46 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 14 6 5 11 4 11
300 40 7.5 1.17 2660 2.05 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 16 6 16 5 12 4
50 10 5 2 550 2.21 0.237"4"x 20" x 0.375" 13'-10" 3'-3" 10'-4" 7'-0" 10'-0" 6 5 8 4 8
100 17.5 5.71 2 1030 2.29 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 8'-0" 12'-0" 5 9 4 9
150 20 7.5 1.17 1800 1.88 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 8'-0" 14'-0" 5 10 4 1020
200 25 8 2 2300 2.38 0.322" x8" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 14 6 12 5 11 4 11
250 31.25 8 2 2105 2.46 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 15 6 15 5 12 4
300 40 7.5 1.17 2660 2.05 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 10'-0" 17'-0" 16 7 12
50 10 5 2 550 2.21 0.237"4"x 20" x 0.375" 13'-10" 3'-3" 10'-4" 7'-0" 10'-0" 6 5 8 4 8
100 17.5 5.71 2 1030 2.29 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 8'-0" 12'-0" 5 9 4 9
150 20 7.5 1.17 1800 1.88 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 8'-0" 14'-0" 12 6 5 10 4 1024
200 25 8 2 2300 2.38 0.322" x8" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 15 6 5 11 4 11
250 31.25 8 2 2105 2.46 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 17 6 17 5 13 4
300 40 7.5 1.17 2660 2.05 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 10'-0" 17'-0" 17 7 15 6 12
50 10 5 2 550 2.21 0.237"4"x 20" x 0.375" 13'-10" 3'-3" 10'-4" 7'-0" 10'-0" 6 5 8 4 8
100 17.5 5.71 2 1030 2.29 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 8'-0" 12'-0" 5 9 4 9
150 20 7.5 1.17 1800 1.88 0.280" x6" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 13'-0" 10 5 10 4 1028
200 25 8 2 2300 2.38 0.322" x8" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 12 4
250 31.25 8 2 2105 2.46 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 10'-0" 17'-0" 17 7 12
300 40 7.5 1.17 2660 2.05 0.365" x10" 24" x 0.938" 15'-10" 3'-9" - - 10'-0" 17'-0" 18 7 6
ECCENTRICITY B B
G F
ft sf ft ft ft lbs ft No. No. No. No.
*50 10 5 2 1100 0 0.237"4"x 20" x 0.375" 13'-10" 3'-3" 10'-4" 6 6 5 6 4 6
*100 17.5 5.71 2 2060 0 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 6 5 8 4 8
16 *150 20 7.5 1.17 3600 0 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 5 9 4 9
*200 25 8 2 4600 0 0.365" x10" 20" x 0.375" 13'-10" 3'-3" 10'-4" 11 5 10 4 10
250 31.25 8 2 4210 0 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 14 6 5 11 4 11
300 40 7.5 1.17 5320 0 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 6 16 5 12 4
*50 10 5 2 1100 0 0.237"4"x 20" x 0.375" 13'-10" 3'-3" 10'-4" 6 5 8 4 8
*100 17.5 5.71 2 2060 0 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 6 5 8 4 8
*150 20 7.5 1.17 3600 0 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 5 10 4 1020
*200 25 8 2 4600 0 0.322" x8" 24" x 0.500" 15'-10" 3'-9" 11'-9" 5 10 4 10
250 31.25 8 2 4210 0 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 15 6 15 5 11 4 11
300 40 7.5 1.17 5320 0 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 16 6 5 13 4
*50 10 5 2 1100 0 0.237"4"x 20" x 0.375" 13'-10" 3'-3" 10'-4" 6 5 8 4 8
*100 17.5 5.71 2 2060 0 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 5 9 4 9
*150 20 7.5 1.17 3600 0 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 5 10 4 1024
*200 25 8 2 4600 0 0.322" x8" 24" x 0.500" 15'-10" 3'-9" 11'-9" 14 6 14 5 11 4 11
250 31.25 8 2 4210 0 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 16 6 5 12 4
300 40 7.5 1.17 5320 0 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 17 7 6 12
*50 10 5 2 1100 0 0.237"4"x 20" x 0.375" 13'-10" 3'-3" 10'-4" 6 5 8 4 8
*100 17.5 5.71 2 2060 0 0.280" x6" 20" x 0.375" 13'-10" 3'-3" 10'-4" 5 9 4 9
*150 20 7.5 1.17 3600 0 0.280" x6" 24" x 0.500" 15'-10" 3'-9" 11'-9" 10 5 10 4 1028
*200 25 8 2 4600 0 0.322" x8" 24" x 0.500" 15'-10" 3'-9" 11'-9" 15 6 15 5 11 4 11
250 31.25 8 2 4210 0 0.365" x10" 24" x 0.500" 15'-10" 3'-9" 11'-9" 16 7 12
300 40 7.5 1.17 5320 0 0.365" x10" 24" x 0.938" 15'-10" 3'-9" - - 18 7 6
MAXIMUM LOAD FOR DMS WEIGHT AND CATWALK RESTRICTED TO 40 PSF*
3'-9"
3'-9"
3'-9"
3'-9"
4'-3"
4'-3"
3'-9"
3'-9"
3'-9"
4'-3"
4'-3"
4'-3"
3'-9"
3'-9"
3'-9"
4'-3"
4"'-3"
4'-3"
3'-9""
3'-9"
4'-3"
4'-3"
4'-3"
4'-3"
6 5
6 5
9 6
6 5
7 6
11 6
6 5
8 6
6 5
8 6
10 6
12 7
9
12
14
7
11
16
8
12
15
8
12
17
18
6
6
6
12 5
12 5
12
13
5
5
12
12
13
12
13
E
E
3'-9"
3'-9"
3'-9"
3'-9"
4'-3"
4'-3"
3'-9"
3'-9"
3'-9"
4'-3"
4'-3"
4'-3"
3'-9"
3'-9"
3'-9"
4'-3"
4'-3"
4'-3"
3'-9"
3'-9"
4'-3"
4'-3"
4'-3"
4'-3"
5
6 5
8 6
11 6
16
6 5
6 5
11 6
10 6
6 5
7 6
12 6
6
8
10
5
6
6
8
14
11
10
16
12
7
16
17
8
16
18
6
13
12
12
5
5
5
12
13
12
13
TABLES: THEHOW TO USE
ONLY OR ON BOTH SIDES (CONSIDER FUTURE USE).
2. DETERMINE IF THE SIGN STRUCTURE WILL HAVE A SIGN MOUNTED ON ONE SIDE
WALK-IN ACCESS PLATFORM.
3. DETERMINE IF THE SIGN STRUCTURE WILL UTILIZE A FRONT ACCESS CATWALK OR A
BY THE DESIGNER.
PRODUCING THESE TABLES REQUIRES ADDITIONAL ANALYSIS TO BE PERFORMED
NEXT LARGER VALUE. ANY DEVIATION FROM THE DESIGN ASSUMPTIONS USED IN
THE PARAMETERS EXCEEDS THE VALUES SHOWN IN THE DESIGN TABLE, USE THE
4. LOCATE THESE PARAMETERS IN THE APPROPRIATE DESIGN TABLE. IF ANY OF
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
AREA
SIGN
2'-4•"
2'-4•"
2'-4•"
2'-4•"
2'-8ƒ"
2'-8ƒ"
2'-4•"
2'-4•"
2'-4•"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-4•"
2'-4•"
2'-4•"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-4•"
2'-4•"
2'-8ƒ"
2'-8ƒ"
2'-4•"
2'-4•"
2'-4•"
2'-4•"
2'-8ƒ"
2'-8ƒ"
2'-4•"
2'-4•"
2'-4•"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-4•"
2'-4•"
2'-4•"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-4•"
2'-4•"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
7'-0"
7'-0"
8'-0"
8'-0"
9'-0"
9'-0"
7'-0"
14'-0"
15'-0"
15'-0"
12'-0"
10'-0"
8'-0"
10'-0"
10'-0"
14'-0"
7'-0"
8'-0"
9'-0"
9'-0" 15'-0"
13'-0"
15'-0"9'-0"
7'-0" 10'-0"
12'-0"8'-0"
8'-0" 14'-0"
15'-0"9'-0"
9'-0" 15'-0"
10'-0"
7'-0"
17'-0"
10'-0"
12'-0"8'-0"
9'-0" 13'-0"
15'-0"9'-0"
10'-0" 17'-0"
17'-0"10'-0"
7'-6"
9'-6"
11'-6"
13'-6"
14'-6"
14'-6"
9'-6"
9'-6"
13'-6"
12'-6"
14'-6"
14'-6"
9'-6"
11'-6"
13'-6"
14'-6"
14'-6"
16'-6"
9'-6"
11'-6"
12'-6"
14'-6"
16'-6"
16'-6"
6'-6"
6'-6"
7'-6"
7'-6"
8'-6"
8'-6"
6'-6"
6'-6"
7'-6"
8'-6"
8'-6"
8'-6"
6'-6"
7'-6"
7'-6"
8'-6"
8'-6"
9'-6"
6'-6"
7'-6"
8'-6"
8'-6"
9'-6"
9'-6"
9'-6"
9'-6"
11'-6"
13'-6"
14'-6"
14'-6"
9'-6"
11'-6"
13'-6"
14'-6"
14'-6"
16'-6"
9'-6"
11'-6"
13'-6"
14'-6"
14'-6"
16-'6"
9'-6"
11'-6"
12'-6"
14'-6"
16'-6"
16'-6"
6'-6"
6'-6"
7'-6"
7'-6"
8'-6"
8'-6"
6'-6"
7'-6"
7'-6"
8'-6"
8'-6"
9'-6"
6'-6"
7'-6"
7'-6"
8'-6"
8'-6"
9'-6"
6'-6"
7'-6"
8'-6"
8'-6"
9'-6"
9'-6"
L1 2L T1 2T
L1 2L T1 2TCOLUMN
HEIGHT
DESIGN MAX DMS
LENGTH (DX)
MAX DMS
HEIGHT (DY)
MAX DMS
THICKNESS
MAXIMUM
DMS WEIGHT (W)
MAXIMUM STRUT
SIZE SIZE
PEDESTAL
SIZE LENGTH LENGTH
PEDESTAL REINFORCEMENT
WIDTH LENGTH BARS
"L" BARS
BARS
SIZE SIZE
LENGTH
FOOTING REINFORCEMENT
#4 BARS TYPE "M" #4 BARS TYPE "N"
BARS BARS LENGTH
SIZESIZE
"T" BARS
VERTICAL CLEARANCE REQUIREMENTS.
ECCENTRICITY AND WEIGHT). SIGN HEIGHT SHOULD BE CHOSEN AS TO SATISFY ALL
1. DETERMINE THE DESIGN HEIGHT AND MAXIMUM DIMENSIONS (AREA, LENGTH, HEIGHT,
PEDESTAL REINFORCEMENT
G
WIDTH
F
LENGTH
#4 BARS TYPE "N"#4 BARS TYPE "M"
HEIGHT
DESIGN
AREA
SIGN
LENGTH (DX)
MAX DMS
HEIGHT (DY)
MAX DMS
THICKNESS
MAX DMS
DMS WEIGHT (W)
MAXIMUM
ECCENTRICITY
MAXIMUM
SIZE
STRUT
SIZE
COLUMN
SIZE
PEDESTAL
LENGTH LENGTH
SIZE
BARS
"L" BARS
FOOTING REINFORCEMENT
BARS
SIZE
LENGTH
SIZE
BARS
SIZE
BARS
"T" BARS
LENGTH
TABLE 2: DOUBLE SIGN FRONT AND BACK DMS PANELS WITH FRONT ACCESS CATWALK
SHEET 4 OF 6
B B
ft sf ft ft ft lbs ft No. No. No. No.
200 25 8 4 3530 3.54 0.375" x12" 20" x 0.375" 13'-10" 3'-3" 10'-4" 8'-0" 14'-0" 13 6 13 5 10 4 10 5
16 250 31.25 8 4 4080 3.63 0.375" x14" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 15 6 15 5 12 4 5
300 37.5 8 4 4750 3.79 0.375" x18" 24" x 0.500" 15'-10" 3'-9" 11'-9" 10'-0" 17'-0" 16 7 12 5
200 25 8 4 3530 3.54 0.375" x12" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 15 6 5 11 4 11 5
20 250 31.25 8 4 4080 3.63 0.375" x14" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 17 6 17 5 11 5
300 37.5 8 4 4750 3.79 0.375" x18" 24" x 0.500" 15'-10" 3'-9" 11'-9" 17'-0" 18 7 6 5
200 25 8 4 3530 3.54 0.375" x12" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 16 6 5 12 4 5
24 250 31.25 8 4 4080 3.63 0.375" x14" 24" x 0.500" 15'-10" 3'-9" 11'-9" 10'-0" 17'-0" 17 7 6 12 5
300 37.5 8 4 4750 3.79 0.375" x18" 24" x 0.938" 15'-10" 3'-9" - - 13'-0" 16'-0" 5
200 25 8 4 3530 3.54 0.375" x12" 24" x 0.500" 15'-10" 3'-9" 11'-9" 10'-0" 17'-0" 12 5
28 250 31.25 8 4 4080 3.63 0.375" x14" 24" x 0.938" 15'-10" 3'-9" - - 10'-0" 17'-0" 5
300 37.5 8 4 4750 3.79 0.375" x18" 24" x 0.938" 15'-10" 3'-9" - - 10'-0" 18'-0" 17 8 7 5
B B
ft sf ft ft ft lbs ft No. No. No. No.
200 25 8 4 7060 0 0.375" x12" 20" x 0.375" 13'-10" 3'-3" 10'-4" 8'-0" 14'-0" 12 5 10 4 10 5
16 250 31.25 8 4 8160 0 0.375" x14" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 12 4 5
300 37.5 8 4 9500 0 0.375" x18" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 11 5
200 25 8 4 7060 0 0.375" x12" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 11 4 11 5
20 250 31.25 8 4 8160 0 0.375" x14" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 11 5
300 37.5 8 4 9500 0 0.375" x18" 24" x 0.500" 3'-9" 11'-9" 10'-0" 17'-0" 5
200 25 8 4 7060 0 0.375" x12" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 12 4 5
24 250 31.25 8 4 8160 0 0.375" x14" 24" x 0.500" 15'-10" 3'-9" 11'-9" 10'-0" 17'-0" 12 5
300 37.5 8 4 9500 0 0.375" x18" 24" x 0.938" 15'-10" 3'-9" - - 10'-0" 17'-0" 5
200 25 8 4 7060 0 0.375" x12" 24" x 0.500" 15'-10" 3'-9" 11'-9" 9'-0" 15'-0" 11 5
28 250 31.25 8 4 8160 0 0.375" x14" 24" x 0.938" 15'-10" 3'-9" - - 10'-0" 17'-0" 5
300 37.5 8 4 9500 0 0.375" x18" 24" x 0.938" 15'-10" 3'-9" - - 13'-0" 16'-0" 5
TABLE 3: SINGLE SIGN DMS PANEL WITH WALK-IN ACCESS PLATFORM
15'-10"
TABLE 4: DOUBLE SIGN DMS PANELS WITH WALK-IN ACCESS PLATFORMS
E
3'-9"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
14
12
14
8
8
8
16 6
15
7
7
6
17
14
12
14
17
16
18
12
11
13
12
16
12
13
15
5
5
5
5
6
5
5
5
12
13
12
16
13
15
E
3'-9"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
4'-3"
6
11
12
11
12
13
11
13
14
12
13
15
7
7
7
7
7
7
8
8
8
8
8
12
11 6
12 6
11 6
12 6
13 7
11 6
13 7
14 7
12 6
13 7
15 7
12
11 5
11 5
13 5 13
12
12 5
13 5 13
11 5
13 5 13
17 6 17
WALK-IN ACCESS
DESIGN TABLES
NOTES:
2'-4•"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-4•"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
2'-8ƒ"
10'-0"
7'-6"
8'-6"
9'-6"
8'-6"
8'-6"
9'-6"
8'-6"
9'-6"
12'-6"
9'-6"
9'-6"
9'-6"
7'-6"
8'-6"
8'-6"
8'-6"
8'-6"
9'-6"
8'-6"
9'-6"
9'-6"
8'-6"
9'-6"
12'-6"
13'-6"
14'-6"
14'-6"
14'-6"
14'-6"
16'-6"
14'-6"
16'-6"
16'-6"
14'-6"
16'-6"
15'-6"
13'-6"
14'-6"
16'-6"
14'-6"
14'-6"
16'-6"
14'-6"
16'-6"
15'-6"
16'-6"
16'-6"
17'-6"
COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION
CHIEF BRIDGE ENGINEER
RECOMMENDEDRECOMMENDED
BUREAU OF PROJECT DELIVERY
ACTING DIR, BUR. OF PROJECT DELIVERY
STANDARD
CENTER-MOUNT SIGN STRUCTURES
BD-649M
NOV. 26, 2013 NOV. 26, 2013
DYNAMIC MESSAGE SIGNS
SHEET 5 OF 6
A. GENERAL
2. THE SIGN AREA REPRESENTS THE AREA FOR ONE DMS.
1. FOR GENERAL NOTES SEE SHEET 1.
1.4. THE FOLLOWING ASSUMPTIONS WERE MADE TO COMPLETE THE DESIGN:
5. ALL DESIGN WAS PERFORMED UTILIZING PENNDOT'S SIGN PROGRAM VERSION
B. CATWALKS
C. WALK-IN ACCESS PLATFORMS
MINUS 1'-0" FROM EACH END OF THE SIGN.
CATWALKS ASSUMED TO BE THE LENGTH OF THE DMS
EQUAL TO THE TOTAL DEPTH OF THE SIGN (4' SINGLE, 8' DOUBLE).
(IN ELEVATION VIEW, AND A MAXIMUM PLATFORM LENGTH
WALK-IN ACCESS PLATFORMS ARE ASSUMED TO BE 4' WIDE
4. ALL SIGNS ARE TO BE CENTERED ON THE COLUMN.
FOR CATWALK/WALK-IN ACCESS PLATFORM AND RAILING LOADS.
AN ADDITIONAL 75 LBS/FT WAS ADDED TO ALL DESIGNS USED TO ACCOUNT
WITH ZERO ECCENTRICITY.
DOUBLE SIGN PANELS ASSUMED SAME SIZE DMS ON FRONT AND BACK
FOR FRONT AND BACK DMS.
CATWALK/WALK-IN ACCESS PLATFORM WAS DOUBLED TO ACCOUNT
THE DEAD LOAD DUE TO THE DMS AND
EACH SIGN PANEL.
FOR BOTH FRONT AND BACK PANELS. USE MEMBERS LISTED IN THE TABLE FOR
3. THE TABLES FOR DOUBLE SIGN PANELS REPRESENT THE USE OF THE SAME SIZE
FOR THE PLATFORM BEING PLACED ON ONE SIDE OF THE SIGN ENCLOSURE.
THE STRUT LENGTHS WERE MODELED ASYMMETRICALLY TO ACCOUNT
L1 2L T1 2T
L1 2L T1 2T
6. SEE NOTES ON SHEET 4.
SIGN PANEL THICKNESS (SEE SHEET 6).
DIAMETER + 1.5" + SIGN SUPPORT BRACKET DEPTH + 3" + •
SINGLE SIGNS ASSUMED AN OFFSET (ECCENTRICITY) OF • OF THE STRUT
HEIGHT
DESIGN
AREA
SIGN MAX DMS
LENGTH (DX) HEIGHT (DY)
MAX DMS MAX DMS
THICKNESS DMS WEIGHT (W)
MAXIMUM MAXIMUM
ECCENTRICITY SIZE
STRUT COLUMN
SIZE
PEDESTAL
SIZE LENGTH
#4 BARS TYPE "M"
PEDESTAL REINFORCEMENT
#4 BARS TYPE "N"
LENGTH WIDTH LENGTH
FG
BARS
SIZE
"L" BARS
FOOTING REINFORCEMENT
BARS
SIZE
LENGTH BARS
SIZE
"T" BARS
BARS
SIZE
LENGTH
HEIGHT
DESIGN
AREA
SIGN MAX DMS
LENGTH (DX) HEIGHT (DY)
MAX DMS MAX DMS
THICKNESS DMS WEIGHT (W)
MAXIMUM MAXIMUM
ECCENTRICITY SIZE
STRUT COLUMN
SIZE
PEDESTAL
SIZE LENGTH
#4 BARS TYPE "M"
PEDESTAL REINFORCEMENT
#4 BARS TYPE "N"
LENGTH WIDTH LENGTH
FG
BARS
SIZE
"L" BARS
FOOTING REINFORCEMENT
BARS
SIZE
LENGTH BARS
SIZE
"T" BARS
BARS
SIZE
LENGTH
DMS ATTACHMENT DETAILS
COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF TRANSPORTATION
CHIEF BRIDGE ENGINEER
RECOMMENDEDRECOMMENDED
BUREAU OF PROJECT DELIVERY
ACTING DIR, BUR. OF PROJECT DELIVERY
STANDARD
CENTER-MOUNT SIGN STRUCTURES
BD-649M
NOV. 26, 2013 NOV. 26, 2013
DYNAMIC MESSAGE SIGNS
SHEET 6 OF 6
A
A
D
D
FABRICATOR
SIGN STRUCTUREDMS
SUPPLIER
B
B
FABRICATOR
SIGN STRUCTUREDMS
SUPPLIER
NOTE:
SHIM AS REQUIRED
BETWEEN ANGLE AND TOP
OF CHORD TO PROVIDE
TIGHT FIT. (SEE SHIM
DETAIL BELOW)
1/2
SP
ACI
NG
1/2
SP
ACI
NG
3/8"
PANEL CONNECTION
PANEL CONNECTION DETAIL
VIEW C-C
VIEW B-BVIEW D-D
VIEW A-A
ALTERNATE PANEL CONNECTION DETAILS
TR
UT
O.
D.
+ 3/4"
1.
2.
3.
4.
5.
6.
7.
COLUMN
ALIGN WITH
BACK OF ANGLE
PROVIDE 1 AT ‚", 3 AT „"
AND 1 AT ˆ" THICKNESS FOR EACH
UPPER SIGN SUPPORT CONNECTION ANGLE.
C C
MINIMUM SIZE OF SIGN SUPPORT BRACKET IS W6x15. LARGER SIGN
SUPPORTS MAY BE REQUIRED FOR CENTER-MOUNT STRUCTURE TO
PROVIDE CLEARANCE BETWEEN HORIZONTAL Z-BRACKETS AND COLUMN.
HORIZONTAL Z-BRACKETS SHALL BE MADE OF ALUMINUM ALLOY
6061-T6 OR AS APPROVED BY THE CHIEF BRIDGE ENGINEER AND
SHALL BE A MINIMUM OF ‚" THICK.
CONNECTION DETAILS PROVIDED ON THIS SHEET HAVE BEEN
DESIGNED BASED ON THE FOLLOWING DMS ASSUMPTIONS:
MAXIMUM DEAD LOAD 6000 LBS
MAXIMUM ECCENTRICITY 5'-0"
MAXIMUM LENGTH (DX) 30'-0"
MAXIMUM HEIGHT (DY) 10'-0"
MAXIMUM DEPTH 4'-0"
DESIGN CALCULATIONS ARE REQUIRED FOR DEVIATIONS TO THESE
ASSUMPTIONS.
ALTERNATE CONNECTION DETAILS ARE PERMITTED, BUT REQUIRE
CALCULATIONS PREPARED BY A PROFESSIONAL ENGINEER REGISTERED
IN THE COMMONWEALTH OF PENNSYLVANIA AND VERIFIED BY A
SECONDARY INDEPENDENT PROFESSIONAL ENGINEER REGISTERED IN
THE COMMONWEALTH OF PENNSYLVANIA. THE DMS MANUFACTURER IS
RESPONSIBLE FOR PROVIDING THESE CALCULATIONS AND HAVING
THEM SIGNED AND SEALED BY BOTH THE PROFESSIONAL ENGINEERS.
DETAILS PROVIDED ARE THE MINIMUM REQUIREMENTS. ANY
DEVIATIONS REQUIRE SPECIAL DESIGN.
FIELD WELDED DMS CONNECTIONS ARE NOT PERMITTED.
USE OF 3RD Z-BRACKET IS BASED ON PROJECT AND WIND LOADING
REQUIREMENTS. MOUNTING CALCULATIONS TO BE COMPLETED TO
AASHTO STANDARDS (SPECIFICATIONS FOR STRUCTURAL SUPPORTS
FOR HIGHWAY SIGNS, LUMINARIES AND TRAFFIC SIGNALS, 4TH
EDITION, 2001, INCLUDING INTERIMS THROUGH 2006) AND
SUBMITTED BY THE FABRICATOR.
ECCENTRICITY
(SEE DETAIL)
PANEL CONNECTION
ALTERNATE CONNECTION PERMITTED (SEE NOTE 4)
Z-BRACKET CONNECTION SHOWN (SEE NOTE 2)
DMS
� STRUCTURE
� SIGN SUPPORT BRACKET
DMS
DMS
ANGLE CENTER OF GRAVITY
� SIGN SUPPORT BRACKET &
Z-BRACKET
� DMS PANEL ASSEMBLY
� DMS
BRACKET (TYP.)
SIGN SUPPORT
BRACKET (TYP)
SIGN SUPPORT
� STRUCTURE
OF GRAVITY
DMS CENTER
� DMS
� SIGN SUPPORT BRACKET
BRACKET (TYP)
SIGN SUPPORT
(SEE NOTE 1)
BRACKET (TYP.)
SIGN SUPPORT
DESIGN REQUIREMENTS
MEMBER AS PER DMS SUPPLIER'S STRUCTURAL
ATTACHED TO INTERNAL CABINET STRUCTURAL
1/2" DIA. A325 BOLTS
2 PER CONNECTION (MINIMUM)
1/2" DIA. A325 BOLT (TYP)
L 3 1/2" x 3 1/2" x 3/8"
L 3 1/2" x 3 1/2" x 3/8"
STANDARD WASHERS
LOCK NUTS AND
U-BOLT WITH
5/8" DIA.
STANDARD WASHERS
LOCK NUTS AND
U-BOLT WITH
5/8" DIA.
AND STANDARD WASHERS
5/8" DIA. U-BOLT WITH LOCK NUTS
(ALUMINUM) (REQUIRED)
Z-BRACKET (TYP)
(ALUMINUM) (REQUIRED)
Z-BRACKET (TYP)
BOLT (TYP) (MIN)
•" A325
(ALUMINUM) (SEE NOTE 7)
Z-BRACKET (3RD) (TYP)
L 3 1/2" x 3 1/2" x 3/8"
LOCK NUTS AND STANDARD WASHERS
5/8" DIA. U-BOLT WITH
(SEE NOTE 1)
BRACKET (TYP.)
SIGN SUPPORT
� STRUT
� STRUT
� STRUT
� STRUT
� STRUT � STRUT
DMS LENGTH (DX)
DM
S
HEI
GH
T (
DY)
1'-0"
MAX.
3'-0"
MA
X.
5'-0"
MAX.
1 1/2"
(TYP.)
MA
X.
SP
ACI
NG
4'-0"
3"
(MAX.)
1/2 x STRUT O.D.
+ 1 1/2"
ST
RU
T
SP
ACI
NG
ST
RU
T
SP
ACI
NG
•x STRUT O.D.
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