B09_Attchment6_Amendment3_RevisedSpecifications_0003.pdf

Attachment 6

06/23 SCOPE OF WORK-1

REVISED (1/12/24) SPECIFICATIONS FOR THE

FABRICATION-SUPPLY OF WIDE-FLANGE STEEL BEAMS

FOR HETCH HETCY—WAPAMA FALLS TRAIL BRIDGE

SCOPE OF WORK

Note: 1/12/2024 revisions noted in bold and italic.

1. DESCRIPTION

1.1. The work of this contract consists of the fabrication and supply of the six steel wide-flange bridge beams and associated components as shown on the attached Wapama Falls Bridge Beam Drawings to the Hetch Hetchy public parking lot in Yosemite National Park. With three W24 steel beams ranging in length from 69-71 feet, which varies because of the skew. The remaining three beams will be W14 steel beams with each having a length of 61 feet. The 70-ft. bridge beam design shall include a skew as identified on the attached drawing/sketch, whereas the 45-ft. bridge beams shall not be designed with a skew. Once fabrication is complete the new steel beams and associated members/connections shall be delivered to the Hetch Hetchy Reservoir parking lot within Yosemite National Park no later than 5/30/2024. The Wide-Flange steel beams and all associated steel components shall be designed and fabricated using ASTM A588 Weathering Steel. See attached .pdf drawing file for beam type, dimensions and length, as well as the diaphragm dimensions, hole locations and sizes, as well as any required coping at the ends the beams.

1.2. The Contractor is responsible for ensuring that all related detailing of the bridge beams and associated connections and support members are provided as shown on the attached drawings which are stamped by a currently registered California Professional Civil Engineer. NOTE: A site visit is allowed upon request to help any prospective offers to see the parking lot of where the beams shall be delivered.

Coordinate any site visits with the Contracting Officer’s Representative (COR) to ensure the date and time for a site visit are acceptable.

1.3. The bridge beams and associated components or attachments shall be fully fabricated as shown on the attached bridge beam design drawings and as outlined in these specifications.

1.4. Contractor shall also be responsible for the fabrication and/or supply of all bridge beams per the attached design and associated components, such as the diaphragms, webbing plates, bolts, bolt holes, angles, etc..

1.5. These specifications are for the fabrication and supply of bridge beams and associate components that provided on the attached design drawings.

2. LOCATION

2.1. The fabricated beams shall be supplied to the Hetch Hetchy Reservoir visitor parking lot which is located in the Mather District of Yosemite National Park no later than 5/30/2024. See attached map for supply location.

2.2. Hauling Restrictions: Comply with all legal load restrictions in the hauling of all new bridge beam and associated components. Load restrictions on park roads are identical to the state load restrictions with

06/23 SCOPE OF WORK-2

such additional regulations as may be imposed by the Park Superintendent. Information regarding rules and regulations for vehicular traffic on park roads may be obtained from the following Park website “https://www.nps.gov/yose/planyourvisit/restrictions.htm”. A special permit will not relieve Contractor of liability for damage which may result from their supply trucks or equipment. Any additional questions please contact the COR.

2.3. The Government will block off the parking lot to allow for entrance of the trucks loaded with fabricated bridge components. The Contractor is responsible for all costs/insurance/pilot-escort vehicles/compliance/permits needed to safely deliver the fabricated bridges in excellent condition to Hetch Hetchy Reservoir Parking Lot in Yosemite National Park. Once they arrive on site the Government will inspect the bridges and associated components and the Government will be responsible for off-loading all the bridge components into a section of the referenced Hetch Hetchy Reservoir parking lot. NOTE: The Contractor is responsible for informing the Government within 7-days in advance of delivering the referenced bridge beam members and associated components (plates/angles/connections/bolts/washers/nuts, etc.) to allow the Government adequate time to have equipment and personnel onsite ready to off-load the referenced bridge components.

2.4. The Contractor and their supply truck drivers shall at all times conduct his operations to ensure the least inconvenience to the public. No closures will be permitted, unless approved onsite by the Contracting Officer’s Representative (COR), depending upon the conditions and traffic issues at time of them being delivered.

2.5. Holiday-Week Day-Weekend Work Restrictions: No deliveries shall be performed between 3:30PM and 7AM Monday thru Friday, and no deliveries on weekends or federal holidays unless otherwise directed by the Contracting Officer. The beams are to be delivered no later than 5/30/2024.

3. RESOURCE PROTECTION

3.1. Preservation of Natural Features: Confine all supply operations to the traveling road corridor and the Hetch Hetchy Visitor Parking Lot. To prevent damage to natural surroundings, no driving off paved or gravel roads. If the Contractor’s trucker damages any Park resources on their way to the final parking lot destination, they will be responsible for restoring and or replacing any damaged Park Resources, at no additional expense to the Government.

4. DRAWINGS

6.1. For fabrication purposes, if drawing conflicts are discovered, immediately notify the COR, so these conflicts can be addressed prior to fabrication to ensure the requested beams and associated components to minimize any delays in fabrication and supply.

06/23 SCOPE OF WORK-3

5. MATERIALS

9.1. All steel beams and associated support/connection members shall be as identified and detailed on the attached Wapama Falls Bridge Beam design drawings.

6. FABRICATION & ASSEMBLY

6.1. WELDING: All weathering steel members shall be welded in accordance with AWS D1.5 (Bridge Code) and as specified by that attached design drawingsa CA Registered Professional Civil or Structural Engineer. All welds shall be x-rayed and inspected by a CA Registered Welding Inspector and a report with recommendations shall be submitted to the Government.

6.2. HOLES: Holes drilled or punched into the beams, diaphragms, splice plates, angles, etc. shall be completed and/or fabricated per the attached Wapama Falls Bridge Beam Design Drawings.

7. SUBMITTALS

7.1. FABRICATION DRAWINGS: The attached bridge beam design drawings shall be used and followed for the fabrication of all beams and associated components. If there are any proposed changes to these referenced design drawings the following criteria must be included for approval:

11.1.1 All Relevant Bridge Dimensions

11.1.2 Bridge Cross sections

11.1.3 Sufficient Detailing

11.1.4 Member Cross sections

11.1.5 General Notes indicating material specifications

11.1.6 Weld Details

11.1.7 Detail of Bolted Splices (if applicable)

11.1.8 Signature and Seal/Stamp of PE Civil/Structural licensed in the State of California and in accordance with these specifications.

11.1.9 Camber Details

12 MEASUREMENT AND PAYMENT

12.1 Payment will be included in the bid item to which this work relates.

END OF SCOPE OF WORK