By Resolution of Commonwealth Transportation
LIMITED ACCESS HIGHWAY
PROJECT MANAGER:
TIMOTHY HARTZELL, P.E. (703) 259-2749 (NOVA District)
SURVEYED BY, DATE:
PRECISION MEASUREMENTS, INC., 9/2015 (804) 340-5229
DESIGN BY:
HNTB CORPORATION (703) 824-5100
SUBSURFACE UTILITY BY, DATE
SO-DEEP, 9/2015 (703) 361-6005
Board dated January 18, 2001
REVISED
STATE
STATE
SHEET NO.
ROUTE
VA.
66
PROJECT
(FO) 0066-96A-358, P101 2D(01)
TOLL GANTRY GENERAL NOTES:
DESIGN FEATURES RELATING TO CONSTRUCTION
Specifications:
Structural Steel:
Construction: Virginia Department of Transportation Road and
Bridge Specifications, 2007.
OR TO REGULATION AND CONTROL OF TRAFFIC
HSS round sections:
MAY BE SUBJECT TO CHANGE AS DEEMED
Gantry overhead truss transverse rotation from level:
ASTM A500, Grade B, Fy = 42 ksi
WT shapes: ASTM A709, Grade 50, Fy = 50 ksi
in fully loaded condition, rotation to be limited to
All other shapes and plates: ASTM A36, Fy = 36 ksi
0.2 (~) degrees from level.
NECESSARY BY THE DEPARTMENT
Design: AASHTO Standard Specifications for Structural Supports
Structural members shall be galvanized in accordance with ASTM A123.
Gantry overhead truss - deflection criteria: in fully
loaded condition,
4th Edition, 2001.
Structural connection bolts and hardware shall be galvanized in
AASHTO Standard Specifications for Highway
2'
-0"
for Highway Signs, Luminaires and Traffic Signals,
deflection of truss element to be
limited to L/150 where L is the truss span length.
C
L Truss
accordance with ASTM A153.
Gantry natural frequency/resonance:
Bridges, 16th Edition, 1996; 1997 and 1998 Interim
Specifications; and VDOT Modifications.
40 Hz upper bound
Connection bolts in superstructure shall be in accordance with ASTM A325,
on natural (resonant) frequency of the gantry and
slip critical.
gantry individual members.
Shop drawings for gantry structural steel, including foundation anchor
Foundation lateral deflection:
bolts, shall be submitted to the Engineer for review and approval.
foundations,
C
L Top
chord
8'-0" (typ.)
These plans are incomplete unless accompanied by the Supplemental
Specifications and Special Provisions included in the contract documents.
Using single drilled shaft
shaft maximum lateral displacement = •"
C
L Bottom
measured at ground surface.
Design Loads:
chord
Construction Tolerances:
Maximum roadway cross slope at toll collection line: Maximum
Self weight of structure.
Gantry height tolerance at completion of construction shall be
Equipment load:
See Toll Gantry Design Parameters,
this sheet.
fall from the high point of road is limited to 30".
2" (~) measured from the highest point of the road under the
Minimum clearance between gantries and other major
gantry to the bottom chord centerline.
infrastructure:
Ice load:
3 lb/sq. ft. on the structure and equipment
surface area.
Basic wind load:
100 miles/hour based on 3 second gust speed at
33 ft. above ground for Exposure C category
with 50 year mean recurrence interval.
The top of drilled shaft elevations shall be field verified by Contractor
before fabrication of toll gantry steel structures. If needed Contractor
shall adjust the height of the column to hold 21'-0" vertical clearance
other major structures that may cause interference
anchor bolt group (centerline of gantry column) shall be 1•".
(e.g. signs, roadway lighting, etc.)
EQUIPMENT SPACING ENVELOPE
Toll Gantry overhead truss assemblies are equipped with bolted
Not To Scale
end strut/brace members to allow for erection of the truss
assembly with post members in place.
COMBINED EQUIPMENT LOADING PER LANE
Overhead truss gusset
plates shall be protected during erection operations.
Py
LOAD CASE
removed, temporary bracing shall be provided as indicated in
requirements of S1. The washers shall be per ASTM F436 and nuts per
ASTM A563. The anchor bolts, nuts and washers to be hot-dipped
operations and shall remain in place until end strut/brace members
(kips)
Vz
Mx
My
Mz
(kips)
(kips)
(k-ft) (k-ft) (k-ft)
Group I-DL
-0.666
0.000
0.000
0.752
0.000
0.000
Group II-DL+W (wind normal to truss)
-0.666
0.000
0.521
2.308
0.000
0.000
Group II-DL+W (wind parallel to truss)
-0.666
0.501
0.000
0.752
1.044
0.827
Group III-DL+Ice+ •(W) (wind normal to truss)
-0.933
0.000
0.260
2.405
0.000
0.000
Group III-DL+Ice+ •(W) (wind parallel to truss)
-0.933
0.251
0.000
1.626
0.522
0.413
are fully bolted in place.
End strut/brace members removed for erection purposes shall be
fully bolted in place prior to placement of the truss assembly on
Concrete in drilled shafts shall have a minimum compressive strength of
Vx
the plans. Temporary bracing shall be placed prior to erection
galvanized in accordance with ASTM A153. The anchor plates shall be
per ASTM A709 Grade 36 (min).
envelope
(see notes)
TRANSVERSE TRUSS ELEVATION
Gantry Erection:
During erection, if end strut/brace members are temporarily
The anchor bolts shall be per AASHTO M314 Grade 55, with supplemental
Equipment spacing
A distance of 30'-0" is to be held to
The tolerance between centerline of drilled shaft and center of
between as-built highest point of roadway below the gantry and the
centerline of lower chord of gantry.
4'
-0"
Dead load:
the post connection plates.
4000 psi. All drilled shaft construction shall be in accordance with the
The Contractor shall have the option of erecting the toll gantries
Special Provisions.
onto shaft foundations fully assembled.
COMBINED EQUIPMENT LOADING PER LARGE SHOULDER (EXCEEDING 6' IN WIDTH)
All concrete used in the construction of the drilled shafts shall be
Gantry erection shall be performed within work durations defined
low permeability concrete.
in the Traffic Control Setup and Takedown Special Provisions.
Py
LOAD CASE
(kips)
Deformed reinforcing bars shall conform to ASTM A615, Grade 60.
The base of each shaft shall have less than 1•" of sediment or
loose material at the time of placement of concrete.
Vx
Vz
Mx
My
Mz
(kips)
(kips)
(k-ft) (k-ft) (k-ft)
Group I-DL
-0.541
0.000
0.000
0.118
0.000
0.000
Group II-DL+W (wind normal to truss)
-0.541
0.000
0.149
0.211
0.000
0.000
Group II-DL+W (wind parallel to truss)
-0.541
0.104
0.000
0.118
0.091
0.070
Group III-DL+Ice+ •(W) (wind normal to truss)
-0.668
0.000
0.074
0.287
0.000
0.000
Group III-DL+Ice+ •(W) (wind parallel to truss)
-0.668
0.052
0.000
0.241
0.045
0.035
TOLL GANTRY DESIGN PARAMETERS AND
EQUIPMENT MOUNTING REQUIREMENTS
Construction joints shall be constructed in accordance with Section
404.03h of the VDOT Road and Bridge Specifications.
Equipment loading for toll
Construction joints shall not be made within 6" of the tip of the
anchor bolts or conduit exiting the drilled shafts.
gantry design is based upon the following
assumed equipment types and counts:
Antennas:
1 each centered over each lane and 1 each positioned
over each lane line.
MAXIMUM EQUIPMENT DESIGN LOAD
Orientation of steel conduits in the drilled shaft shall be determined
in the field. Location of conduits to be coordinated with the opening
Cameras and illumination strobes:
in the base plate of gantry column.
and one centered over large shoulders (over 6' in width).
The depth of the steel conduits in the drilled shaft shall be determined
Scanners:
in the field by Electrical Contractor.
centered over large shoulders (over 6' in width).
For additional conduit information, see toll and traffic management plans.
Enforcement Beacons: 1 each centered over each lane.
Steel conduits in drilled shaft concrete shall not be bundled together.
Light Sensors:
One per gantry.
Cable Troughs:
1 each running the full length of the overhead
1 each centered over each lane
(SERVICE LOADS)
Up to 3 each centered over each lane and one
Y-axis
Z-axis into page
X-axis
A minimum of 3" clear spacing shall be maintained between steel conduits.
Drilled shafts shall be installed in general accordance with project
specifications and Special
Provisions for Drilled Shafts,
dated
August 29, 2008. Provisions relating to: the technique shaft, permanent
casing, nondestructive evaluation,
cross-hole sonic logging (CSL) tests
and CSL tubes, and O-Cell load testing do not apply to drilled shafts
for toll gantry foundations with drilled shafts of 40' or less In depth.
Separate CSL testing and CSL tube provisions for drilled shafts in
excess of 40' in depth will apply as indicated on the plans and in the
Special
Provisions.
Equipment mounted to the gantry overhead truss shall be fully
Large shoulder defined
contained within a placement envelope as defined in the Transverse
Truss Elevation
Equipment Spacing Envelope, this sheet.
by width > 6'-0"
Submitted
equipment parameters falling outside of this envelope shall be subject
the excavated soils are generally consistent with those described in
the approved ECS Mid-Atlantic,
strata need not be verified.
LLC Geotechnical Report. Tip bearing
The quality control inspector shall also
size, bottom condition and alignment prior
to placement of concrete in accordance with the VDOT Special Provision
for Drilled Shafts, dated August 29, 2008.
to rejection.
6:
41
:
39 AM
Pen Tabl
e = LD_v95.
t
bl
1
/5/201
6
Lane
Lane
Lane patterns
vary
shall fall within maximum acceptable load groups, as defined in the
Maximum Equipment Design Load Tables, this sheet.
Sign conventions
are defined in the Truss Elevation - Equipment Load Axis Definition
detail, this sheet.
TRUSS ELEVATION
Loads were conservatively defined based on the
equipment types, counts and placement envelope defined above.
EQUIPMENT LOAD AXIS DEFINITION
Submitted equipment type and placement resulting in loads in excess
of those indicated in the table below shall be subject to the
Not To Scale
review and approval of the Engineer and may be subject to rejection.
REFERENCES
COMMONWEALTH OF VIRGINIA
Performance standards used in the design of toll gantries follow:
shaft excavation.
d1
07371
02d(
01
)
.
dgn
12'-0"
to the review and approval of the Engineer and may be subject
Groundwater, including perched water, may be encountered during drilled
Drill shafts in place, level and remove all loose material from bottom of
Gantry truss vertical control:
shaft before concrete is placed.
of roadway to the bottom chord centerline see construction
keep shaft free of water.
12'-0"
Design loadings for equipment mounted to the gantry overhead truss
A qualified drilled shaft quality control inspector shall log and verify
verify the overall depth,
truss member.
When dry construction method is used,
Remove all laitance material from top of shaft
DEPARTMENT OF TRANSPORTATION
( PROFILES, DETAIL & DRAINAGE
DESCRIPTION SHEETS, ETC. )
21'-0" (measured from highest point
I-66 MULTIMODAL IMPROVEMENTS INSIDE THE BELTWAY
tolerances, above).
TOLL GANTRY
GENERAL NOTES
prior to further construction.
Gantry overhead truss - twist about transverse axis:
Temporary casing may be used to stabilize a drill hole.
be removed while placing the concrete.
The casing shall
During casing removal, concrete
In fully
loaded condition, twist to be limited to 0.5 (~) degrees.
HNTB CORPORATION
THESE PLANS ARE UNFINISHED
should be maintained at least 10 feet above the bottom edge of
AND UNAPPROVED AND ARE NOT
the casing.
TO BE USED FOR ANY TYPE
ARCHITECTS ENGINEERS & PLANNERS
ARLINGTON, VIRGINIA
SCALE
NOT TO SCALE
PLAN NO.
OF CONSTRUCTION OR THE
ACQUISITION OF RIGHT OF WAY.
A
DATE
DEC.
2015
PROJECT
0066-96A-358
SHEET
FILE NO.
OF
SHEET NO.
2D(01)