MICHIGAN DEPARTMENT OF TRANSPORTATION 6" X 8" (NOMINAL POST) 3-1/2" DIA. 2 HOLES TAPERED HARD WOOD WEDGES (HARDWOOD WEDGE

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1 X (NOMINAL POST) 1-1/ DIA. 2 HOLES X 8" (NOMINAL POST) 3-1/ DIA. 2 HOLES TAPERED HARD WOOD WEDGES (HARDWOOD WEDGE TO BE OAK, MAPLE OR OTHER APPROVED DENSE HARDWOODS) TO HOLD POST IN A STABLE POSITION AFTER CONCRETE HAS SET. USE OR 3" WEDGES TO COVER APPROXIMATELY 75% OF POST WIDTH ON TWO ADJACENT SIDES. 18" MINIMUM 1-1/ FILLET OF BITUMINOUS WATER PROOFING MATERIAL 3 (FOR X POST) 4.5 (FOR X 8" POST) STEEL AND CONCRETE PROJECTION ABOVE GROUND 10 GAUGE STEEL SLEEVE BOTH ENDS OPEN (ASTM A-653) WOOD POST MATERIAL OF MDOT STANDARD SPECIFICATIONS FOR CONSTRUCTION CONCRETE PER MDOT STANDARDS SPECIFICATIONS FOR CONSTRUCTION PLYWOOD OR EQUIVALENT + 8" X 8" X 5/8" X 1 X 5/8" - DEPENDING ON POST SIZE TO 3" MAXIMUM OF TAMPED EARTH 3-15/1 OR NOTE: INSIDE DIMENSIONS OF SLEEVE MAY BE A MAXIMUM OF 1/8" GREATER THAN SHOWN. 5-15/1 CONCRETE ENCASEMENT WEDGING OR 3" 1/8" 7" 3/ 18" DIA. 10 GAUGE STEEL SLEEVE BOTH ENDS OPEN (ASTM A-653) 5-15/1 OR 7-15/1 TACK WELD WEDGE WOOD POST FOUNDATION DETAILS DEPARTMENT DIRECTOR Kirk T. Steudle FOR Michigan Department of Transportation PREPARED BY APPROVED BY: DIRECTOR, BUREAU OF FIELD SERVICES WOOD POSTS DESIGN DIVISION DRAWN BY: CHECKED BY: DHD AJU APPROVED BY: DIRECTOR, BUREAU OF HIGHWAY DEVELOPMENT 1 OF 5

2 5-1/ OR 7-1/ (ACTUAL) ( X (NOMINAL) POST) 1-1/ DIA. 2 HOLES ( X 8" (NOMINAL) POST) 3-1/ DIA. 2 HOLES THE POST MAY BE DRIVEN OR PLACED IN AN AUGERED HOLE. IF AUGERED, BACKFILL WITH EXISTING MATERIAL IN FIVE 1 DEEP LAYERS, TAMPING EACH LAYER. WOOD POST DIRECT EMBEDMENT DETAIL NOTE: DIRECT EMBEDMENT ONLY AT LOCATIONS IDENTIFIED IN PLANS OR PROPOSAL. 1/ SAW CUT (EXCEPT IN 5 18" 8" DIA. AUGERED HOLE (FOR 3-1/ x 5-1/ POST) 10" DIA. AUGERED HOLE (FOR 5-1/ x 7-1/ POST) SINGLE POST INSTALLATIONS ONLY * SINGLE POST ASSEMBLIES) 3-1/ OR 5-1/ 7 5 (ALL WOOD POSTS) (FOR X NOMINAL POST) 1" (FOR X 8" NOMINAL POST) 1-1/ SLOPE 5-1/2 " OR 7-1/ ACTUAL MULTIPLE POST SINGLE POST SAW CUT DETAIL BREAKAWAY HOLES/SAWCUT RELATIONSHIP * SAW CUT SHALL BE PLACED ON APPROACH TRAFFIC SIDE OF POST. 2 OF 5 NOTE: THE ORIGINAL SIGNED COPY IS KEPT ON FILE AT THE.

3 X (NOMINAL) OR X 8" (NOMINAL) WOOD POST 3/8" DIA. BOLT, 2 FLAT ALUMINUM L X 3" X 3/8" ANGLES MAY 1-1/ WASHERS & NYLON INSERT LOCKNUT STIFFENER ANGLE BE INSTALLED ON EITHER SIDE OF EACH POST. 1 1/6 SIGN LENGTH ALUMINUM EXTRUSION C L OF POST SINGLE TYPE I SIGN 3/8" DIA. RECTANGULAR FLAT BOLTS, FLAT WASHERS & NYLON INSERT LOCKNUTS. 3/8" DIA. BOLTS C L OF HOLES FOR 3/8" DIA. BOLTS. BOLT STIFFENER ANGLE TO EACH PANEL. 1/ X 3/ ELONGATED BOLT ON APPROX. 2 CENTERS FULL HOLES MAY BE USED TO FACILITATE LENGTH ALL EXTRUSIONS. O.015" SEE NOTE 5 ON 5 1/ 0.040" EXTERIOR TYP. PANEL WIDTH 30" MAX. 30" MAX. 1 MAX. TYPICAL HOLE SPACING 1-1/ ALIGNMENT OF ALUMINUM ANGLES. SEE SIGN ALUMINUM EXTRUSION PER MDOT STANDARD SPECIFICATIONS FOR CONSTRUCTION STIFFENER ANGLE- L X X 1/ (ALUM.) x SIGN HEIGHT CORNER RADIUS FLAT WASHER 7/8" O.D. X 0.40 I.D. X 0.050" 1/ X 3/ ELONGATED BOLT HOLES MAY BE USED TO FACILITATE 1 MAX. REAR VIEW ALIGNMENT OF PANELS. TYPE I SINGLE SIGN - ERECTION DETAILS NOT TO SCALE 3 OF 5 NOTE: THE ORIGINAL SIGNED COPY IS KEPT ON FILE AT THE.

4 7-1/ (FOR x 8" POST) 1-1/ 3/8" DIA. BOLT, 2 FLAT WASHERS & NYLON INSERT LOCKNUT (TYP). 4 BOLTS PER ANGLE. 8 BOLTS PER POST. 1/6 SIGN LENGTH ALUMINUM A A EXTRUSION C OF POST L x 3" x 3/8" ALUMINUM ANGLE x 8" (NOMINAL) WOOD POST BACK-TO-BACK TYPE I SIGNS INSIDE ANGLE OUTSIDE ANGLE 9" 1 MAX. NOTE: REFER TO TYPE I SIGN-ERECTION DETAILS FOR CONNECTING ANGLES TO BACK OF SIGNS. 1 MAX. 9" SECTION A-A TYPE I BACK-TO-BACK SIGNS-ERECTION DETAILS 4 OF 5 NOTE: THE ORIGINAL SIGNED COPY IS KEPT ON FILE AT THE.

5 L 1/6 L 2/3 L 1/6 L 3/8" DIA. HEX. HD. BOLT NYLON INSERT LOCKNUT FLAT WASHER FLAT WASHER NYLON WASHER SAME AS BOLT ABOVE EXCLUDE CUT ON SINGLE POST ASSEMBLIES * * SAW CUT SHALL BE PLACED ON CONNECTION DETAIL APPROACH TRAFFIC SIDE OF POST. TYPES II & III SIGNS - ERECTION DETAILS NOTES: 1. THE DRILLED BREAKAWAY HOLES ARE TO BE CAREFULLY CENTERED ON THE POSTS. 2. ALL CONCRETE FOUNDATIONS SHALL BE FINISHED AS SHOWN AND ANY SURPLUS MATERIAL SHALL BE COMPLETELY REMOVED FROM RIGHT-OF-WAY. SIGNS SHALL NOT BE ERECTED ON WOOD POSTS FOR A MINIMUM OF 24 HOURS AFTER PLACEMENT OF THE CONCRETE. 3. THE PAY ITEM "SIGN, TYPE " INCLUDES ALL ATTACHING DEVICES AND HARDWARE. 4. WOOD POSTS MAY BE DIRECTLY EMBEDDED ONLY AT THOSE LOCATIONS IDENTIFIED IN THE PLANS OR PROPOSAL. 5. A 0.500" WIDE X O.015" DEEP GROOVE SHALL RUN THE ENTIRE LENGTH AT TOP AND BOTTOM OF ALL EXTRUDED ALUMINUM PANELS TO ACCOMMODATE OVERLAP ING. 6. ALL BOLTS, NUTS, AND WASHERS SHALL BE MDOT STANDARDS SPECIFICATIONS FOR CONSTRUCTION. 7. FIELD DRILL ALUMINUM ANGLES AND WOOD POSTS. 5 OF 5 NOTE: THE ORIGINAL SIGNED COPY IS KEPT ON FILE AT THE.

BARRIER OFFSET 0" A 6" 6" A 12" 12" A 26" A 26" 3A OR 4A L OR S * ** L OR S L OR S

BARRIER OFFSET 0 A 6 6 A 12 12 A 26 A 26 3A OR 4A L OR S * ** L OR S L OR S ACCEPTABLE (TCB) TYPES AND ANCHORING DETAILS BASED ON UNDERLYING SURFACE TYPE AND BARRIER OFFSET FROM DROP-OFF BARRIER OFFSET UNDERLYING SURFACE 0" A 6" 6" A 12" 12" A 26" A 26" TCB TYPE DETAIL TCB TYPE