union0572[1].pdf
PDF 430 KB Posted
- Attached to
- Concrete T-Wall Sections
- Solicitation number
- RFQ - 17A - 08082700000000000172
- Issued by
- Knox County, Maine
About this file
This is a technical plan sheet from the Maine Department of Transportation for Bridge #0572 (Messer Bridge) located in Union, Knox County, prepared in September 2006. The project involves installing stub guardrail posts on the bridge, constructing concrete T-walls at both upstream and downstream elevations, placing new concrete curbing, and installing concrete footings. The scope includes installing three spaced guardrail posts at 3'-1 1/2" intervals, constructing T-walls with heights ranging from 4'-0" to 5'-0" according to the provided T-wall schedule, placing new concrete widening on top of the T-walls, installing concrete pads at the elevation of the T-wall bases, and utilizing existing stone retaining walls as heavy riprap. The reinforcing steel schedule specifies multiple bar sizes and quantities, including #5 bars for curb stirrups and longitudinal reinforcement, footing dowels, and various spacing requirements throughout the structural elements.
The project includes site preparation work such as saw cutting and removing existing pavement to a depth of 2" or more, a minimum of 6" in front of the existing curb, and placement of hot bituminous pavement to match existing grade and crossslope after installation. Reinforcing steel must conform to ASTM A615 Grade 60 specifications, with minimum 2" clearance maintained for all reinforcing steel. The work requires drilling and grouting dowel bars into existing ledge and curb elements, loaming and seeding all new and disturbed areas of sideslopes, and chamfering all exposed edges of concrete. The plan indicates typical details for guardrail post installation with offset brackets, spacer plates, and base plate configurations with specified hole dimensions and anchor bolt requirements.
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Text version
F.H.W.A.
REG. NO.
STATE PROJECT NUMBER
SHEET
NO.
TOTAL
SHEETS
AUGUSTA, MAINESHEET OF
STATE OF MAINE
DEPARTMENT OF TRANSPORTATION
MAINE
MESSER BROOK
IN THE TOWN OF
OVER
border for HP plotter (divisions)
Bridge #0572 1 1
MESSER BRIDGE
UNION
KNOX COUNTY
1 1 September 2006
Install stub guardrail posts on bridge.
3 Sp.@3’-1 1/2 "= 9’-4 1/2 "1’-11 3/4 " 1’-11 3/4 " 1’-1 3/4 "
1’-1 3/4 "
Guardrail post with offset bracket (typ.)
Guardrail length to be determined in the field.
PLAN VIEW
L
3" 7" 8"
1’-6"
C 3/4 " 0 Anchor bolts L
Stub guardrail post
Spacer plate
TYPICAL CURB SECTION
LEGEND
GENERAL NOTES
Section view of existing concrete
Section view of new concrete
1...Chamfer all exposed edges of concrete 3/4 "
2...All reinforcing steel shall have a minimum of 2" of clearance.
Section view of ledge
5 Sp.@3’-1 1/2 " (typ. both sides, both ends)
13’-4"
C Roadway (Construction)
1 1/4 "
W6x25
Hole this face
1" Thick steel base plate 3/16 "
3/4 " O Hole
FRONT SIDE
3 1/2 "
7"
7"
1 1/4 "
1 1/4 "
TOP
1 1/4 " 1 1/4 "4 1/2 "
C 7/8 " O HolesL
Center 5" O hole on plate
1/4 " Thick steel plate
SPACER PLATE DETAIL
STUB POST DETAILS
LC 7/8 " O Holes
Top of existing curb
Roadway elevation at existing curb.
Install stub guardrail posts on top of new curb.
UPSTREAM ELEVATION
(Downstream is similar)
Place a concrete pad at the elevation of the bottom of the t-walls. Pad to be
1 1/2 times wider than it is tall.
T-wall shear key (typ.)
T-wall section
Place a new concrete curb against the existing. See typical section view for details (typ.).
1’-2" 7 1/2 "
11’-2"
Place concrete T-Walls. Align face with abutment face and match skew.
T-WALL ELEVATION VIEW
B
CA
1 1/2
Use the existing stone retaining walls as heavy riprap.
6"
New concrete widening to be cast on top of T-Wall "C".
Mark No. Width
T-WALL SCHEDULE
Wall Height Stem Height
A
B
C
4’-0"
4’-0"
2’-6"
2’-6"
2’-6"
2’-6"
5’-0"
5’-0"
3’-6"
Install a concrete footing. Top to be 2’-6" below bottom of existing superstructure slab.
Loam and seed all new and disturbed areas of sideslopes. D
D Shear Key 4
Stem length
4’-0"
4’-0"
4’-0"
REINFORCING STEEL SCHEDULE
MARK SIZE NO. LENGTH LOCATION
#5
#5
#5
#5
#500
#502
#501
#503
11’-0"
2’-0"
2’-0"
Curb stirrup
Curb longit.
Curb dowel
3’-10"
#500 BAR
Reinforcing steel to be ASTM A615 Grade 60
Footing dowel
10’-10"
Place #503 bars at 2’-0" o.c.
#500 Stirrup bars
@ 1’-0" o.c.
Saw cut and remove pavement to a depth of 2" or more a minimum of 6" in front of the existing curb. After new curb and posts are installed place hot bituminous pavement to match the existing grade and crosslope.
Place footing concrete in undermining if possible.
Use the existing stone retaining walls as heavy riprap (typ.).
*Two with the majority of the wall on the right of the stem.
Two with the majority of the wall on the left of the stem.
#505 Bar
Existing breastwall.
Drill and grout a #503 bar dowel a minimum of 12" into ledge (typ.).
Center on footing.
Reinforce with a mat of steel using #5 bars at 9" o.c. transverse and 18" o.c. longitudinal.
Drill and grout #502 bars into existing curb. Space at 1’-0" o.c. horizontally alternating top and bottom. Grout per manufacterers recommendations.
#504 #5 16 2’-0" Footing reinf., (cut to fit)
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