Public Notice

PUBLISHED IN THE CLAREMORE DAILY PROGRESS, CLAREMORE, OKLAHOMA, APRIL 11, 2012.

INVITATION TO BID

 

Pursuant to the provisions of Sections 1500 to 1507, Title 19 O.S., bid for County purchases in excess of $10,000.00 are to be solicited by the County Clerk’s Purchasing Agent.  The bids will be evaluated and awarded by the Board of County Commissioners at the time and date listed at the end of this invitation.

BID #577- REINFORCED CONCRETE BRIDGE STRUCTURE

BR#87 CLAREMORE LAKE CAUSEWAY

ROGERS COUNTY, OKLAHOMA

PART 1 – GENERAL

1.1 GENERAL OVERVIEW OF PROJECT

A. To provide precast concrete spans for placement over Claremore Lake in Rogers County, Oklahoma. The spans are to be pre or post tensioned if required by the span length and design loading. A sketch of the existing structure is provided with these specifications. The outer slabs are to be approximately 14 feet 1 inches in length, and the center span is approximately 29 feet 2 ½ inches. The thickness will be controlled by the design loading. The width of the spans shall be a minimum of 24 feet 6 inches.

B. Sketches of the existing bridge structure and required guardrail plate details are included with this specification.

1.2 WARRANTY

A. The precast fabricator shall warrant and guarantee the precast products against defects in material and workmanship for a minimum of 1 year after assembly and acceptance by the County.

1.3 SUMMARY

B. This Section includes the performance criteria, materials, design, production, and erection of structural precast and precast, prestressed concrete for the entire project.

The work performed under this Section includes all labor, material, equipment, related services, and supervision required for the manufacture and erection of the structural precast and precast, prestressed concrete work shown on the Contract Drawings.

C. This Section includes the following:

1. Pre or Post tensioned slab span units.

2. Precast slab span units.

1.4 PERFORMANCE REQUIREMENTS

A. Structural Performance: Provide structural precast concrete members and connections capable of withstanding the current LRFD HL593 design loads with an additional 25 pounds per square foot for wearing surface loads.

1.5 ACTION SUBMITTALS

A. Product Data: For each type of product indicated. Retain quality control records and certificates of compliance for 5 years after completion of structure.

B. The fabricator shall provide a preliminary set of shop drawings within two weeks of contract award. Final drawings shall be provided within one week of receipt of comments by the Project Engineer. All submittals shall be sent to the Project Engineer.

C. Design Mixtures: For each precast concrete mixture. Include compressive strength.

D. Shop (Erection) Drawings:

1. Detail fabrication and installation of structural precast concrete units including connections at member ends and to each adjoining member.

2. Indicate locations, plan views, elevations, dimensions, shapes, and cross sections of each unit, openings, support conditions and types of reinforcement, including special reinforcement.

3. Detail loose and cast5in hardware, lifting and erection inserts, connections, and joints.

4. Indicate locations, tolerances and details of anchorage devices to be embedded in or attached to structure or other construction.

5. Coordinate and indicate openings and inserts required for guardrail attachments.

6. Indicate location of each structural precast concrete member by same identification mark placed on unit.

7. Indicate relationship of structural precast concrete members to adjacent materials.

8. Indicate locations and details of joint treatment.

9. Indicate shim sizes and grouting sequence.

10. Design Modifications: If design modifications are proposed to meet performance requirements and field conditions, notify the Engineer and submit design calculations and Shop Drawings. Do not affect the appearance, durability or strength of members when modifying details or materials. Maintain the general design concept when altering size of members and alignment.

E. Provide handling procedures, erection sequences, and for special conditions provide temporary bracing and shoring plan.

F. Comprehensive engineering design signed and sealed by a qualified professional engineer responsible for its preparation licensed in the State of Oklahoma.

1.6 INFORMATIONAL SUBMITTALS

A. Qualification Data: For fabricator and persons specified in "Quality Assurance" Article to demonstrate their capabilities and experience. Include list of completed projects with project names and addresses, names and addresses of engineers and owners, and other information specified.

B. Material Test Reports for aggregates: From an accredited testing agency, indicating and interpreting test results for compliance with requirements indicated.

C. Material Certificates: Signed by manufacturers certifying that each of the following items complies with requirements.

1. Cementitious materials.

2. Reinforcing materials and post stressing tendons.

3. Admixtures.

4. Structural5steel shapes

1.7 QUALITY ASSURANCE

A. Fabricator Qualifications: A firm that complies with the following requirements and is experienced in producing structural precast concrete units similar to those indicated for this Project and with a record of successful in5service performance.

1. Assumes responsibility for engineering structural precast concrete units to comply with performance requirements. This responsibility includes preparation of Shop Drawings and comprehensive engineering analysis by a qualified professional engineer.

Professional Engineer Qualifications: A professional engineer licensed in the State of Oklahoma and who is experienced in providing engineering services of the kind indicated. Engineering services are defined as those performed for installations of structural precast concrete that are similar to those indicated for this Project in material, design, and extent.

2. Has sufficient production capacity to produce required members without delaying the Work.

B. Design Standards: Comply with ACI 318 applicable to types of structural precast concrete members indicated.

C. Product Options: Drawings indicate size, profiles and dimensional requirements of precast concrete members and are based on the specific types of members indicated.

Other fabricators’ precast concrete members complying with requirements may be considered. Refer to Division 1 Section “Substitutions.”

1.8 DELIVERY, STORAGE, AND HANDLING

A. The fabricator shall deliver the structural precast members within 45 days of the awarded contract date.

B. Deliver all structural precast concrete members in such quantities and at such sequence and times to assure compliance with the agreed upon project schedule and setting sequence to ensure continuity of installation.

C. Storage is not available due to minimal area along the roadway right5of5way.

D. Handle and transport members in a manner to avoid excessive stresses that could cause cracking or other damage.

E. Lift and support members only at designated points indicated on the Shop Drawings.

1.9 SEQUENCING

A. Furnish loose connection hardware and anchorage items to be embedded in or attached to other construction without delaying the Work. Provide locations, setting diagrams, templates, instructions, and directions, as required, for installation.

(see the entire bid in the April 11 Claremore Progress)

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