On-Call_Guardrail_Repair_Services_(Part_2)_Construction_Methods.pdf

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PART II-2

CONSTRUCTION METHODS

2.1 Construction Survey – Not required.

2.2 Restoration of Private Improvements - Protect in place all existing curb and gutter, streetlight poles, street signs, utility poles, trees, and any other existing improvements in the public right-of-way.

Payment for restoration of private improvements shall be considered as included in the various bid items and no additional compensation will be allowed.

2.3 Protect All Structures and Substructures - It shall be the responsibility of the Contractor to locate, verify depth, and protect all structures, including underground utilities as identified by Underground Service Alert. The Contractor shall bear the entire cost of repairing or replacing any such structures damaged by Contractor during the execution of the work. All repairs and replacements shall be done in the presence of the inspector.

2.4 Tree Root Protection Zone - At no time shall any materials, supplies, or fill be stored and/or equipment be parked or driven within the prescribed root protection zone unless otherwise directed by the City. The root protection zone is defined as the larger of the drip line of the tree or the distance from the trunk equal to six-inches (6”) for each inch of trunk diameter measured at four and a half feet (4.5’) above existing grade.

It is recognized that failure to abide by these provisions will result in substantial root damage to trees that may not be immediately apparent. The City will therefore assess damages according to the International Society of Arboriculture standards and a deduction will be made from the Contractor's payment.

2.5 Site Maintenance - The work site shall be maintained in a neat, clean, hazard free state throughout the duration of the repairs. Contractor shall sweep the areas within the projects limits before leaving the site for the day and shall immediately haul and dispose of all excess materials and construction debris. The disposals shall be in conformance with the approved Construction and Demolition Waste Management Plan. Payment for site maintenance shall be considered as included in the various bid items and no additional compensation will be allowed.

2.6 Compliance with Laws, Regulations, and Safe Practices - The Contractor shall perform all work in a safe, competent manner and in accordance with all federal, state, and local statues, regulations, and ordinances. The Contractor will be solely and completely responsible for the conditions of the job site, including safety of all persons and property during the performance of the work.

2.7 Pre-Repair Site Inspection - A pre-repair inspection shall be conducted by contractor and city at each location to verify the scope of work, residential or business notification requirements, traffic control required, etc. to verify the work prior to the repair. If required work is outside the limits of the proposed unit prices in the Contractor’s bid schedule, per Section 2.7, Changes Initiated by the Agency, of the SSPWC, the Contractor shall submit a Change Order for approval by the City prior to commencing work.

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All locations will be within Pasadena city limits. Payment for the pre-repair inspection shall be considered incidental and shall be paid for at the contract unit price of other related bid items.

Payment shall include all transportation expenses to and from the site, personnel’s time, assessment of scope of work, preparing change orders and any other incidentals associated with other related bid items.

2.8 Mobilization - The work associated with Mobilization includes all work in accordance with Section 7-3.4 of the SSPWC. The scope of work under this bid item shall include all costs associated with insurance, bonds, required permits, moving onto the job (mobilization), supervision, coordination of concurrent work with utility agencies, and de-mobilization.

Payment for mobilization shall be considered incidental and shall be paid for at the contract price for other related bid items. Payment shall include full compensation for organizing and moving all forces, supplies, equipment, and incidentals to the project site, regardless of the number of times such moves are made, all preconstruction costs incurred after award of the contract, and demobilization.

2.9 Construction Area Signage - Construction area signage shall be placed sufficiently in advance of the area of construction in order to keep the work zone safe and OSHA compliant. Contractor shall place construction area signage in locations which help facilitate in keeping employees and the public safe, maintaining efficient movement of traffic, and communicate to the public that caution is required around the work site.

No separate payment for construction area signage will be paid. This work in considered incidental and part of the work for related bid items

2.10 Traffic Control - All traffic control operations shall conform to the provisions of the latest edition of the Manual of Uniform Traffic Control Devices (MUTCD), and the California Supplement to the MUTCD. It is the Contractor's responsibility to provide for public safety and traffic control. The City’s Department of Transportation shall review and accept the Contractor’s operations and inform the Contractor if an unsafe or hazardous condition is observed. The Contractor must comply with directives for hazard abatement immediately or within the timeframe imposed by the City. In addition to the requirements of MUTCD, the Engineer may require flatter traffic tapers, additional traffic control devices, barricading, and other signing in order to ensure driver awareness and safety in the construction area. Further, the Contractor shall provide Type-II barricades and delineators at locations as determined by the Engineer.

The following shall be adhered to for all required signage:

• “NO PARKING” signs, if required, shall have the "TOW AWAY" provision, shall cite and comply with the applicable Vehicle Code and Pasadena Municipal Code sections, and shall display the Pasadena Police Department phone number.

• The signs shall indicate dates and time durations of the parking prohibition, specific to the location of work, printed clearly in a manner acceptable to the Engineer.

• “NO PARKING/TOW AWAY” signs must be posted at least forty-eight (48) hours in advance of the beginning of construction. “NO PARKING/TOW AWAY” signs may not be attached to street trees. “NO PARKING/TOW AWAY” signs may only be attached to street light standards or parking meters with plastic wrap, string, or plastic-coated wire.

Tape and other materials that may damage the painted surface of the street light standards

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and parking meters are not allowed. Parking administration must be notified after signs have been posted twenty-four (24) hours in advance of the beginning of construction.

• “NO PARKING/TOW AWAY” signs shall be removed by the Contractor within twenty-four (24) hours after the effective date. New signs shall be posted when changes occur in the parking prohibitions indicated on the previously posted signs.

All traffic lanes shall have a minimum width of ten feet (10’) unless otherwise approved. No traffic lanes shall be closer than five feet (5’) from the edge of an excavation, nor closer than two feet (2’) from curbs, barricades, or other obstructions.

Public transportation stops shall be maintained unless otherwise approved by the Engineer. The Contractor shall contact local transit agencies and coordinate transit route changes and/or stop relocation if transit access cannot be maintained. If the Contractor should fail to provide and install any of the signs or traffic control devices required by these Specifications, the Engineer may cause such signs or traffic control devices to be placed by others and charge the costs therefor against the Contractor and deduct same from progress payments.

Where traffic is being permitted to use an uncompleted section of roadway, the condition of said roadway section shall be subject at all times to the approval of the Engineer. When said section is deemed by the Engineer to be unsafe for traffic use, the Contractor may be required to close it to traffic or to take measures to eliminate any unsafe conditions.

The Contractor shall maintain continuous access to school drop-off sites, all residential developments, and businesses within the project limits. Any closed access or drive approach shall be immediately restored when the construction operation that necessitated such closure is completed. The Contractor shall maintain local and emergency access at all times.

All traffic lanes shall be kept open between the hours of 7:00 a.m. to 9:00 a.m. and 4:00 p.m. to 6:00 p.m. per the No Traffic Lane Closure Map included as Exhibit “D”.

Payment for designing, setting up, maintaining and controlling traffic will be paid for at the contract Each bid price per location. This contract is set up to repair 3 separate locations. The contract price and payment shall include all costs for installing and maintaining traffic control devices and temporary signing, including flagmen, signing barricades, and temporary facilities required for the safe handling of vehicular traffic for twenty-four (24) hours per calendar day for the duration of the work. No additional compensation will be allowed.

2.11 Drawings - All guardrail work shall be done in accordance with the following Caltrans Standard Drawings for Midwest Guardrail Systems (MGS) (See Exhibit “B”):

A77L1 - MGS Standard Railing Sections (Wood Post with Wood Block) A77M1 - MGS Standard Hardware A77N1 - MGS Wood Post and Wood Block Details A77N4 – MGS Typical Railing Delineation and Dike Positioning Details A77P2 - MGS Typical Layouts for Embankments A77S1 - MGS End Anchor Assembly

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Work done in the public right-of-way to restore street sections disturbed during guardrail repair services must adhere to the following City of Pasadena standard drawings (See Exhibit "C"):

S-417 - Restoration of Concrete Street Excavations

S-422 - PCC Pavement Jointing and Details

2.12 Remove Guardrail – Contractor shall remove all damaged guardrail post, block and metal rail elements (sheets) in advance of the guardrail repair. Portions of the guardrail not damaged shall be salvaged and reused in the repair work. Other area of damaged where the metal rail element is not damaged and only the post or block, shall be repaired by using the salvaged sheet and only replacing the post or blocking.

No separate payment for removal of damaged guardrail system. This work is considered incidental to the related bid items.

2.13 Midwest Guardrail System Repair – Contractor shall repair the damaged guardrail using the various elements as shown on the Bid Schedule and described in the specifications. The work shall include the following:

• Furnish and install 6” x 8” x 7’ Wood Post

• Furnish and install 6” x 8” x 14” Wood Block

• Furnish and install Metal Rail Element Standard Railing (12’ – 6” Sheets)

• Furnish and install End Anchor (Type SFT)

• Furnish and install End Wrap Around with Yellow/Black Sticker

• Delineate Post

Payment for the installation of the MGS will be paid for at the contract of Each per bid price per location and shall include full compensation for the installation of all components of the MGS and for all materials, tools, equipment, and labor necessary to perform the work. No additional compensation will be allowed.

2.14 Delineate Post - At each new post location, Contractor shall place a delineator per State Drawing A77N4, MGS Typical Railing Delineation and Dike Positioning Details.

Payment for the delineation of all posts shall be paid for at the contract unit price each per location and shall include full compensation for the installation, and all materials, tools, equipment, and labor necessary to perform the work. No additional compensation will be allowed.

2.15 Restoration of Roadway - Concrete pavement removed shall be restored in accordance Pasadena Standard Drawings S-417 and S-422, Exhibit "C". All concrete removals must be done by saw cutting and all edges protected against any damage. The cut edges shall be cleaned and kept moist during pouring to insure a good bond with new concrete.

Unless otherwise shown on the Plans or specified in the Special Provisions, the thickness of bases, subbases, Portland Cement Concrete pavement, drive aprons, and sidewalk shall be as follows:

• Base and Subbase - Equal to existing

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• Portland Cement Concrete - 1-inch thicker than existing (minimum is 8-inch for streets)

Where work is within a State highway right-of-way, California Department of Transportation requirements shall govern only if greater than the above thickness.

Payment for the restoration of concrete roadway shall be paid for at the contract unit square foot price per location and shall be in conformance with the Pasadena Standard Drawings. Payment shall include full compensation for all materials, tools, equipment, and labor necessary to perform the work. No additional compensation will be allowed.

2.16 Clear and Grub

General Attention is directed to Section 300-1 "Clearing and Grubbing" of the Standard Specifications, Section P-300-1 "Clearing and Grubbing" and to Section P-300-1.1.1 "Individual Tree and Stump Removal" of these Special Provisions.

Clear and Grub includes removal and disposal of the following:

1. Mulch and rock ground cover

2. irrigation systems (including drip line, pipe, fittings, valves, controllers, emitters)

3. shrubs and trees within the area of disturbance or as shown.

Trenches, holes and depressions resulting from clear and grub activities shall be backfilled with unclassified fill under Section 300-4 "Unclassified Fill" of the Standard Specifications. If resulting trenches, holes and depressions are in surfaced areas that remain undisturbed, backfill with material that is equal or better in quality and to the thickness of the surrounding materials.

Trench sheeting and shoring shall conform to the provisions in Section 306-1.16, Bracing Excavations, of the standard specifications and these special provisions.

Payment Full compensation for trench sheeting and shoring shall be included in the contract lump sum price paid for Clear and Grub and no additional compensation will be allowed.

Full compensation for backfilling resulting trenches, holes and depressions for clear and grub work shall be considered as included in the contract lump sum price paid for Clear and Grub and no additional compensation will be allowed.

Full compensation for disposal of the removed materials for clear and grub work shall be considered as included in the contract lump sum price paid for Clear and Grub and no additional compensation will be allowed.