HomeMy WebLinkAboutBridge Railing and Guard Rail ReplacementTS-i
Technical Specifications
Barber Street Bridge Railing and Guard Rail Replacement
Section ...................................................................................................................................... Page
1. Maintenance of Traffic ............................................................................................................. 1
2. Metal Beam Guard Rail Replacement (Section 536) ................................................................ 4
3. Bridge Railing Replacement (Index #403) ............................................................................... 8
1
SECTION 1
MAINTENANCE OF TRAFFIC
PART 1 - GENERAL
1.1 SUMMARY
A. Maintain traffic within the limits of the project for the duration of the construction period, including
any temporary suspensions of the work. Construct and maintain traffic detours during construction.
Furnish, install and maintain traffic control and safety devices during construction. Furnish and
install work zone pavement markings for maintenance of traffic in construction areas. Provide any
other special requirements for safe and expeditious movement of traffic specified on the plans.
Maintenance of Traffic (MOT) shall include all facilities, devices and operations as required for
safety and convenience of the public within the work zone.
B. Any traffic lane closures and detours will require a traffic control plan signed by a Florida
Professional Engineer. Traffic control plans will be submitted to the city for review approval at
least one week before construction.
C. Do not maintain traffic over those portions of the project where no work is to be accomplished or
where construction operation will not affect existing roads. Do not obstruct or create a hazard to
any traffic during the performance of the work and repair any damage to the existing pavement
open to traffic.
PART 2 - PRODUCTS
2.1 MATERIALS
A. All products will meet the following FDOT specification requirements:
2.2 TRAFFIC CONTROL DEVICES
A. Use only the materials meeting the requirements of FDOT specification Section 990, of the design
standards and MUTCD.
2.3 TRAFFIC CONTROL STANDARDS
A. FDOT Design standards are the minimum standards for the use in the development of all traffic
control plans. The MUTCD part VI is the minimum national standard for traffic control for
roadway construction, maintenance and utility operations. Follow the basic principles and
minimum standards contained in these documents for the design, application, installation,
maintenance and removal of all traffic control devices, warning devices and barriers which are
necessary to protect the public and workers form hazards within the project limits.
2.4 MAINTENANCE OF ROADWAY
A. Maintain all lanes that are being used for maintenance of traffic, including those on detours and
temporary construction access, under all weather conditions. Keep the lanes reasonably free of
dust, potholes and rutting. Provide the lanes with the drainage facilities necessary to maintain a
smooth riding surface under all weather conditions.
2.5 NUMBER OF TRAFFIC LANES
A. Maintain one lane of traffic in each direction of travel. Maintain two lanes of traffic in each
direction at existing four lanes (or more) cross roads, where necessary to avoid undue traffic
congestion. Construct each lane used for maintenance of traffic as least as wide as the traffic lanes
existing in the area before commencement of construction. Do not allow traffic control and
warning devices to encroach onto travel lanes used for MOT.
B. The Engineer may allow the Contractor to restrict traffic to one-way operation for short-periods of
time provided that the Contractor employs adequate means of traffic control and does not
2
unreasonable delay traffic. When a construction activity requires restricting traffic to one-way
operations, locate the flaggers within view of each other when possible. When visual contact
between flaggers is not possible, equip them with 2-way radios, official, or pilot vehicle(s), or use a
portable traffic signal.
2.6 FLAGGERS
A. Provide trained flaggers in accordance with Section 105 FDOT standards or MUTCD Part VI.
2.7 TEMPORARY TRAFFIC CONTROL DEVICES
A. Install and maintain adequate traffic control devices, warning devices and barriers to protect the
traveling public and workers, and to safeguard the work area. Erect the required traffic control
devices, warning devices and barriers to prevent any hazardous conditions and in conjunction with
any necessary traffic re-routing or detours.
B. Notify the Engineer of any schedule operations which will affect traffic patterns or safety,
sufficiently in advance of commencing such operation to permit the Engineers review and approval
of the traffic control plan for the proposed installation of traffic control devices and warning
devices and barriers.
C. Keep traffic control devices, warning devices, safety devices and barriers in the correct position,
properly directed, clearly visible and clean at all times. Immediately repair, replace or clean
damaged, defaced or dirty devices or barriers.
2.8 PORTABLE CHANGEABLE MESSAGE SIGNS (PCMS)
A. Furnish changeable message signs in accordance with the MOT plans and these special provisions.
A typical 5 foot by 8 foot PCMS will be located as shown on the MOT plan as a stand alone
maintenance of traffic device to provide construction information.
PART 3 – EXECUTION
3.1 GENRAL TRAFFIC CONTROL SPECIFICATIONS
A. Construction area signs for temporary traffic control shall be furnished, installed, maintained, and
removed when no longer required in conformance with the provisions in these supplemental
specifications.
B. Use only when stationary mounted construction area signs are used. Attention is directed to the
contractor to provide and furnish all required traffic control devices and signs per the design traffic
management plan.
C. Construction Project Information Signs shall be used and provided by the contractor. Attention is
directed in the supplemental specifications regarding the number and type of construction project
information signs to be furnished, erected, maintained, and removed and disposed of.
D. Unless otherwise shown on the plans or specified in these special provisions, the color of
construction area warning and guide signs shall have black legend and border on orange
background.
E. Use only when construction area signs are fluorescent orange in color. Orange background on
construction area signs shall be fluorescent orange.
F. Repair to construction area sign panels will not be allowed, except when approved by the Engineer.
At nighttime under vehicular headlight illumination, sign panels that exhibit irregular luminance,
shadowing or dark blotches shall be immediately replaced at the Contractor's expense.
3
G. The Contractor shall notify the Engineer for operators of subsurface installations at least 5 working
days, but not more than 14 calendar days, prior to commencing excavation for construction area
sign posts.
H. Excavations required to install construction area signs shall be performed by hand methods without
the use of power equipment, except that power equipment may be used if it is determined there are
no utility facilities in the area of the proposed post holes. The post hole diameter, if backfilled with
Portland cement concrete, shall be at least 4 inches greater than the longer dimension of the post
cross section.
I. Construction area signs placed within 15 feet from the edge of the travel way shall be mounted on
stationary mounted sign supports as specified in these supplemental specifications.
J. The Contractor shall maintain accurate information on construction area signs. Signs that are no
longer required shall be immediately covered or removed. Signs that convey inaccurate
information shall be immediately replaced or the information shall be corrected. Covers shall be
replaced when they no longer cover the signs properly. The Contractor shall immediately restore to
the original position and location any sign that is displaced or overturned, from any cause, during
the progress of work.
K. The full width of the traveled way shall be open for use by public traffic when construction
operations are not actively in progress.
L. The full width of the traveled way shall be open for use by public traffic on Saturdays, Sundays,
Special Days, designated legal holidays; after 3:00 p.m. on Fridays and the day preceding
designated legal holidays; and when construction operations are not actively in progress.4
M. Work that interferes with public traffic shall be limited to the hours when lane closures are allowed.
N. Under one-way reversing traffic control operations, public traffic may be stopped in one direction
for periods not to exceed 10 minutes.
O. On days that lane closures are not allowed, one lane may be closed to maintain the seal coat surface
as required in Standard Specifications. Lane closures to maintain the seal coat surface shall be
restricted to daylight hours when public traffic will be least inconvenienced and delayed, as
determined by the Engineer.
P. Local authorities shall be notified at least 5 business days before work begins. The Contractor shall
cooperate with local authorities to handle traffic through the work area and shall make
arrangements to keep the work area clear of parked vehicle.
Q. When work vehicles or equipment are parked on the shoulder within 6 feet of a traffic lane, the
shoulder area shall be closed with fluorescent orange traffic cones or portable delineators placed on
a taper in advance of the parked vehicles or equipment and along the edge of the pavement at
25-foot intervals to a point not less than 25 feet past the last vehicle or piece of equipment.
R. The Contractor shall immediately restore to the original position and location a traffic cone or
delineator that is displaced or overturned, during the progress of work.
S. A minimum of one paved traffic lane, not less than 10 feet wide, shall be open for use by public
traffic in each direction of travel.
T. The Engineer may approve deviations if there is no significant increase in the cost to the project and
if the work can be expedited and better serve the public traffic.
END OF SECTION - 1
SECTION 536
GUARDRAIL
536-1 Description.
Construct metal guardrail on posts of timber, steel, or as specified in accordance with the
Contract Documents and the Design Standards.
Also, remove existing guardrail, construct guardrail anchorages, and replace guardrail
posts, as specified in the plans.
536-2 Materials.
536-2.1 Guardrail: Construct guardrail of the standard W-beam or thrie beam type. Use
materials for the rail and rail elements meeting the steel requirements of 967-1.
536-2.2 Posts:
536-2.2.1 General: Unless the Contract Documents designate a particular type of
post, the Contractor may choose the type of post to use. Use posts of either timber, or steel, and
of the sizes and dimensions shown in the plans. Use the particular type selected throughout a run
of rail, except where special steel posts are required.
536-2.2.2 Timber Posts: Meet the requirements of the latest edition of the
Southern Pine Inspection Bureau’s Standard Grading Rules for Southern Pine Lumber, for No.1
grade timber, and treat the posts in accordance with the requirements for posts in 955-5.3. Ensure
that penetration of preservative is in accordance with requirements for round piles and fence
posts in 955-6.2. Shape and drill the posts prior to treatment, and ensure that they do not vary
more than 1 inch from the specified length. Dress all timber posts on all four sides (S4S).
536-2.2.3 Steel Posts: Use steel posts meeting the requirements of ASTM A36
steel. Galvanize the posts in accordance with the requirements of ASTM A 123, with 2 oz/ft2 of
zinc coating. Drill the posts prior to galvanizing. Ensure that the manufacturer furnishes
certification showing physical and chemical properties of each heat, the amount of spelter
coating, and conformance to ASTM A 123.
The Contractor may use steel guardrail posts of either a rolled section or a
welded structural shape with nominal dimensions as shown in the Design Standards.
For welded structural shapes, meet the following requirements:
(1) Ensure that the design properties of the shape meet or exceed
the design properties for a W 6 x 9 shape as contained in the AISC Manual of Steel
Construction.
(2) Weld in accordance with the requirements of ASTM A 769.
(3) After cutting posts to length, place a weld to seal the spaces
between the web plate and flange plates.
(4) Galvanize as specified above after completing all drilling and
welding.
536-2.3 Anchor Blocks: Use anchor blocks of Class I concrete, and construct and place
them in accordance with the requirements shown in the plans or as directed by the Engineer.
536-2.4 Offset Blocks: Use guardrail offset blocks of either timber, steel, recycled
plastic, or rubber, and of the sizes specified in the Design Standards.
Treat timber blocks in accordance with the requirements for posts in 955-5.3.
Ensure that penetration of preservative is in accordance with requirements for round piles and
fence posts in 955-6.2. For timber offset blocks, meet the requirements of the latest edition of the
4
Southern Pine Inspection Bureau’s Standard Grading Rules for Southern Pine Lumber, for No.1
grade timber. Dress all timber offset blocks on all four sides (S4S). Ensure that timber offset
blocks do not vary more than 0.25 inch from the specified length.
Use rubber blocks that have a minimum Durometer hardness of 50
(ASTM D 2240), show no cracking at the end of an ozone exposure of 100 ±10 pphm for
15 hours at 100ºF (ASTM D 1149 mounting type A), do not exceed 15 points change in
Durometer hardness in oven ageing for 70 hours at 158ºF (ASTM D 573), and show no cutting
or tearing under a 6,500 lb load applied through a guardrail section. Ensure that the blocks
present a neat appearance and have plane surfaces. Provide rubber blocks that are 6 inches wide,
8 inches deep and 14 inches high. Allow dimensional tolerances of ±5/8 inch in height, ±3/8 inch
in width, and ±3/8 inch in depth.
For Recycled Plastic offset blocks, meet the requirements of Section 972.
536-2.5 Reflector Elements: Mount reflectors onto the guardrail in accordance with the
details shown in the plans and the Design Standards. Provide reflectors that meet the
requirements of 993-3.
536-2.6 Certification: Provide the Engineer a certification from the manufacturer
confirming that all materials (timber or steel posts, anchor and offset blocks, reflector elements,
and all other accessories) meet the requirements of this Section, Section 6 and the Design
Standards. Provide the Engineer a copy of the certification at least ten days prior to guardrail
construction.
Also furnish the Engineer a Certificate of Compliance certifying that the guardrail
system, materials and construction practices comply with applicable Design Standards and
Specifications.
Acceptance of furnished material will be based on the Certificate of Compliance,
material certification and visual inspection by the Engineer.
536-3 Setting Posts.
Set standard length posts vertically to the depth shown in the Design Standards. Set
special length posts vertically to the depth shown in the plans. Align and realign posts as
necessary, until final acceptance. Where the posts are not set in concrete or mounted on
structures, backfill the post holes with suitable thoroughly tamped material. As an alternate
method, the Contractor may use a post-driving machine, meeting the approval of the Engineer
and capable of driving the posts without damaging them.
For guardrail post replacement, backfill and compact the existing hole prior to setting the
new post.
If driving timber posts, the Contractor may either block out holes in the asphalt for the
posts during the asphalt paving operation or cut holes through the asphalt mat prior to the post
installation. Blocked out holes or cut holes in the asphalt pavement shall be at least 50% larger
than the sectional area of the timber post. After completing driving of the posts patch the area of
asphalt around each post with fresh hot bituminous mixture.
If driving steel posts, drive the post directly through the asphalt mat. Fill depressions or
cracks with fresh, hot bituminous mixture in a manner meeting the approval of the Engineer.
For either timber or steel post locations, in which rock, concrete or asphalt thicker than
2 inches exist, remove such material and backfill with suitable material, thoroughly tamped as
detailed in the Design Standards.
5
536-4 Erection of Rail.
Erect the guardrail panels, supports, anchors, etc., as shown in the Design Standards.
536-5 Existing Guardrail.
Stockpile guardrail, so specified, within the right-of-way at a location approved by the
Engineer. Dispose of all remaining guardrail not specified for stockpiling.
536-6 Method of Measurement.
536-6.1 Guardrail: The quantity to be paid for will be the plan quantity, in feet,
constructed, in place and accepted.
The plan length of a run of guardrail will be determined as a multiple of the
nominal panel lengths plus the nominal lengths of terminal sections, unless payment for the
terminal sections are included in the end anchorage or bridge anchorage assemblies.
536-6.2 End Anchorage Assemblies: The quantity to be paid for will be the number of
each type as designated, constructed, in place and accepted.
536-6.3 Special Guardrail Posts: The quantity to be paid for will be the number of each,
constructed, in place and accepted.
The designation “Special Guardrail Posts” will include only such posts as require
special fabrication, for installation at locations where the normal setting would conflict with
concrete structures, such as approach slabs, culvert slabs, footings, inlets, etc. Special posts,
however, will not include posts for double-face median guardrail, regardless of whether they are
embedded in or attached to concrete.
536-6.4 Bridge Anchorage Assemblies: The quantity to be paid for will be the number
of each, constructed, in place and accepted.
536-6.5 Guardrail Anchorage (Concrete Barrier Wall): The quantity to be paid for
will be the number of each, constructed, in place and accepted.
536-6.6 Guardrail Post Replacement: The quantity to be paid for will be the number of
each, replaced.
536-6.7 Removal of Existing Guardrail: The quantity to be paid for will be the length,
in feet, measured prior to removal.
536-6.8 Special Steel Guardrail Posts: The quantity to be paid for will be the number of
each, constructed, in place and accepted.
536-7 Basis of Payment.
536-7.1 Guardrail: Price and payment will be full compensation for all work specified
under this Section, including the furnishing and installing of the acrylic plastic reflectors and all
other materials as specified. Payment will be made under the items as follows:
a. Where the Contractor furnishes all materials for the guardrail, and the Engineer
does not require shop-bent rails, payment will be made under the basic item of Guardrail.
b. Where the radius of the guardrail installation is such as to require shop bending
of the guardrail panels, payment will be made under the item of Guardrail (Shop-bent Panels).
All component parts of the complete guardrail installation will be included in the
price per foot for the above items except for the separate payments to be made under the special
items listed below.
536-7.2 End Anchorage Assemblies: Price and payment will include all components
specified on the plans and Design Standards.
6
536-7.3 Special Guardrail Posts: Price and payment will include all costs for furnishing
and installing the special posts that are over and above the costs for the normal posts, which are
replaced by such special posts.
536-7.4 Bridge Anchorage Assemblies: When the plans provide for direct payment for
Bridge Anchorage Assemblies, price and payment will include furnishing and installing the
special End Shoes, Wood Blocks or Retrofit Wing Posts, Concrete Anchor Posts and necessary
hardware.
When the plans do not provide for direct payment for Bridge Anchorage
Assemblies, the Contractor shall include the cost for the assemblies in the Contract price per foot
for the guardrail.
536-7.5 Guardrail Anchorage (Concrete Barrier Wall): Price and payment will
include installing connections to concrete barrier walls, as shown on the Design Standards, Index
Nos. 400 and 410.
536-7.6 Guardrail Post Replacement: Price and payment will include all labor,
materials, and equipment required for removal and disposal of existing posts in areas provided
by the Contractor, backfilling and compacting existing holes, and replacement with new posts.
536-7.7 Removal of Existing Guardrail: Price and payment will include all labor and
equipment required for removal and disposition of the existing guardrail, as specified in the
plans. No additional payment will be made for the removal of the back rail on double face
guardrail, thrie beam guardrail, nested rail, safety pipe rail, rub rail or end anchorages.
536-7.8 Special Steel Guardrail Posts with Accessories: Price and payment will
include all components specified on the plans and Design Standards.
536-7.9 Payment Items: Payment will be made under:
Item No. 536- 1- Guardrail - per foot.
Item No. 536- 2- Guardrail (Shop-Bent Panels) - per foot.
Item No. 536- 7- Special Guardrail Post - each.
Item No. 536- 8- Bridge Anchorage Assemblies - each.
Item No. 536- 73- Removal of Existing Guardrail - per foot.
Item No. 536- 75- Special Steel Guardrail Posts with Accessories - each.
Item No. 536- 76- Special Length Guardrail Posts - each.
Item No. 536- 82- Guardrail Anchorage (Concrete Barrier Wall)- each.
Item No. 536- 83- Guardrail Post Replacement- each.
Item No. 536- 85- Guardrail, End Anchorage Assembly - each.
7
~
Sheet No.
Index No.
2010 FDOT Design Standards Revision
403
07/01/05 1 of 3
Last
Sheet No.
Index No.
2010 FDOT Design Standards Revision
403
07/01/05 2 of 3
Last
Sheet No.
Index No.
2010 FDOT Design Standards Revision
403
07/01/05 3 of 3
Last