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Inquiry #1: On pg. 6 of the specs it states:

"Replace section 2-1.08 of the RSS for section 2:
2-1.08 PREBID PROJECT EXAMINATION MEETING
The Department will conduct a mandatory meeting to provide a technical overview of the work and to visit
the job site.
Each bidder must attend the meeting. The bidder's representative must be a company officer, project
superintendent, or project estimator. For a joint venture, one of the parties must attend the meeting.
The Department does not accept a bid from a bidder who did not attend the meeting."

I have called and emailed the contact information made available in the spec, but have not heard a response. Please advise as to when and where the Project Pre-Bid Meeting will be held.

Inquiry submitted 12/04/2017

Response #1:More details regarding the mandatory meeting is forthcoming.
Response posted 12/04/2017


Response #2:See addendum No. 1.
Response posted 01/02/2018


Response #3:See Addendum 2.
Response posted 01/08/2018


Response #4:See Bidder Inquiry #13 below for more information regarding the site visit.
Response posted 01/11/2018




Inquiry #2: Reference "Tower - Lower Chord Damper Bracket Detail No. 1" Sheet (17 of 22).

The detail labeled "Typical Interior Tower Bracket - Plan" on the referenced drawing sheet includes this call out: "SEE OUTSIDE BRACKET DETAILS ON ON "TOWER BRACKET DETAILS NO. 1" SHEET FOR NOTES AND DIMENSIONS". The "Tower Bracket Details No. 1" sheet does not appear to be included in the Project Plans. Please provide this sheet or details for the bracket.

Inquiry submitted 12/06/2017

Response #1:Submitted for consideration.
Response posted 12/06/2017


Response #2:Contractor to bid per the current contract bid documents.
Response posted 12/07/2017


Response #3:Refer to Addendum No 4, dated February 13, 2018. Plan sheet 24 of 29 has been replaced to revise the detail call-out.
Response posted 02/15/2018




Inquiry #3: Reference "YBI Anchorage - Damper Layout" Sheet.

No details or call outs are made for the Damper Brackets attached to the face of the YBI Anchorage Housing. Please confirm that these brackets do not get removed, reattached, or modified in any way.

Inquiry submitted 12/06/2017

Response #1:Submitted for consideration.
Response posted 12/07/2017


Response #2:The brackets in question do not get removed, reattached, or modified in any way. Please bid per the current contract documents.
Response posted 12/07/2017




Inquiry #4: In the sole source procurement for the Viscous dampers provided in Special Provision 55-4.02A, did the Supplier commit to:
a. Did the Supplier commit to providing a Supply Bond for the entire amount of the procurement?
b. What payment terms, including any retention was agreed to by Supplier?
c. Will the Supplier carry insurance, specifically Completed Operations Insurance to cover the materials supplied and Workers Compensation for any site visits required?

Inquiry submitted 12/12/2017

Response #1:Submitted for consideration.
Response posted 12/12/2017


Response #2:Bid per the current contract documents.
Response posted 12/14/2017




Inquiry #5: The Special Provision Specification 5-1.20A references coordination with Contract No. 3G4571. Should this reference be for awarded Contract No. 3G4574? Additionally, for coordination of work, please provide a schedule for the other Contract(s) we are to coordinate with under Contract No 3G4424.
Inquiry submitted 12/21/2017

Response #1:Submitted for consideration.
Response posted 12/21/2017


Response #2:EA 3G4574 project is completed, However the bidder shall coordinate the with any other contractor working on the SFOBB.
Response posted 02/16/2018




Inquiry #6: Confirm if there is any domestic material requirement applicable for the project, and what clause is being used.
Inquiry submitted 12/22/2017

Response #1:Submitted for consideration.
Response posted 12/29/2017


Response #2:Other than sole source procurement in the SSP no other domestic requirement is specified.
Response posted 02/12/2018




Inquiry #7: Caltrans Standard Specifications, section 6-1.05 refers to specific brand or trade name and substitution. Please provide the definition of the term “or equal”, and how does it apply to this project.
Inquiry submitted 12/22/2017

Response #1:Submitted for consideration.
Response posted 12/29/2017


Response #2:Bidder to bid per plans and specs.
Response posted 02/20/2018




Inquiry #8: In reference to the lane closure charts in Special Provision 12-4.02C(3)(g). Charts G1 and G2 indicate that lane closures will be allowed to remain in place for 80/EB on Sundays until 9am, however the ramps associated with these closures have earlier opening times as indicated in Charts J2, J3, and J4. Can the Sunday ramp closures shown in the referenced charts be adjusted to match the lane closure requirements in Charts G1 and G2?
Inquiry submitted 12/22/2017

Response #1:Submitted for consideration.
Response posted 12/29/2017


Response #2:No. No adjustments can be made.
Response posted 02/12/2018




Inquiry #9: Page 34 of the Specials requires steam cleaning the existing paint.

"Steam cleaning existing dampers fluid leakage includes cleaning dirt, grease, existing damper fluid leakage, and other foreign material from surfaces using steam. Steam temperature at the nozzle must be from 265 to 375 degrees F. "

Can the existing paint withstand temperatures between 265 to 375 degrees F.?

Is it the intention of the specification to spot blast clean and paint undercoat the existing paint damaged by the steam cleaning?

Is there an estimated square footage of the area to be steam cleaned?

Inquiry submitted 12/29/2017

Response #1:Submitted for consideration.
Response posted 12/29/2017


Response #2:1. Yes, the existing paint can withstand temperatures between 265 to 375 degrees F.

2. No.

3. Refer to Sheet 9 of the project plans for the steam cleaning limits

Response posted 02/02/2018




Inquiry #10: In the NOTICE TO BIDDERS AND SPECIAL PROVISIONS Document under the sheet labeled "Special Notices", the second bullet reads, "The contract award period has been extended for this project. See section 3-1.04."

In the Special Provisions I cannot find where Section 3-1.04 has been modified. Please clarify if the award period of 30 days is to be modified.

Inquiry submitted 01/03/2018

Response #1:Submitted for consideration.
Response posted 01/11/2018


Response #2:See Addendum 3.
Response posted 02/12/2018




Inquiry #11: Please confirm that Caltrans is intending to submit for a BCDC Amendment to Permit No. M1987.042.05 that will extend the current permit for the life of the project. Amendment 5 provided with the Contract Documents is shown to expire on June 30, 2019, however, the Contract duration provided in the Invitation to Bid is 600 Working Days.
Inquiry submitted 01/08/2018

Response #1:Submitted for consideration.
Response posted 01/09/2018


Response #2:The BCDC will be extended.
Response posted 01/26/2018




Inquiry #12: Please confirm that all 94 damper brackets to be reconstructed under Bid Item Code 045986 are to be steam cleaned and blast cleaned to bare metal as indicated in Special Provision 59-2.01A(1). If so, please confirm that this cleaning is payable under Bid Item Code 590116.
Inquiry submitted 01/09/2018

Response #1:Submitted for consideration.
Response posted 01/10/2018


Response #2:Yes. The pay item is shown in the right column for each row in the table in paragraph 1 of section 59-2.01A(1) of the Special Provisions.
Response posted 01/16/2018




Inquiry #13: Is there an itinerary for the Job Site tour?
Inquiry submitted 01/11/2018

Response #1:See the link below for more information and to register for the tour.

http://www.dot.ca.gov/dist4/construction/contracts/04-3G4424/tour/tour.html
Response posted 01/11/2018




Inquiry #14: Can you post the sign-in list from the mandatory meeting/site tour?
Inquiry submitted 01/18/2018

Response #1:See links below.

Link for Meeting Sign-in:
http://www.dot.ca.gov/dist4/construction/contracts/04-3G4424/tour/3G4424_Mandatory_Meeting_Sign-in_Sheet.pdf

Link for Tour Sign-in:
http://www.dot.ca.gov/dist4/construction/contracts/04-3G4424/tour/3G4424_Mandatory_Site_Tour_Sign-in_Sheet.pdf
Response posted 01/18/2018




Inquiry #15: 1. Please provide a Damper delivery schedule from Taylor Devices.

2. The Special Provisions do not have a lane closure chart for daytime hours. Is the Contractor allowed to use the daytime/lower deck lane closure that is installed by the Bridge Maintenance Department for the Damper Contract Work?

Inquiry submitted 01/18/2018

Response #1:Submitted for consideration.
Response posted 01/22/2018


Response #2:1) Submitted for consideration.

2) Contractor can coordinate with the maintenance crew and work within the day time lane closure place by our maintenance department.
Response posted 01/29/2018




Inquiry #16: Plan Sheet 3/22, Note 11 states that the installation temperature is assumed at 70 degrees and that damper rod set is at mid-stroke. The Oakland Bay bridge area typically is not at an ambient temperature of 70 degrees at night. Please clarify what steps must be taken to insure accurate installation.
Inquiry submitted 01/23/2018

Response #1:Submitted for consideration.
Response posted 01/23/2018


Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 02/02/2018


Response #3:Note 11 says "The dimensions on the Damper Details are based upon the following assumptions:", not that the installation temperature is assumed at 70 degrees.
Please bid per the current project documents.

Response posted 02/07/2018




Inquiry #17: Given that plans call to replace existing dampers with newer designed dampers that now have a Lost Motion Device. Will the cylinder of the Lost Motion Device fit through the existing opening(s) on the main bridge structure?
Inquiry submitted 01/23/2018

Response #1:Submitted for consideration.
Response posted 01/23/2018


Response #2:Yes. The damper with lost motion device will fit the existing openings.
Response posted 01/24/2018




Inquiry #18: It was mentioned during the Mandatory Pre-Bid meeting that the Damper Manufacturer had an installation guide manual. Can CT please post this for all contractors?
Inquiry submitted 01/23/2018

Response #1:Submitted for consideration.
Response posted 01/23/2018


Response #2:Refer to Part 2 of the schedule table in section 55-4.01C(1) of the special provisions.
Please bid per the current contract documents and that information obtained at the Mandatory Pre-Bid meeting.

Response posted 02/02/2018




Inquiry #19: Many of the contract plan sheets have the following note:
“The contractor must verify all controlling field dimensions before ordering or fabricating any material.”
Please elaborate what does CT mean by “All controlling field dimensions”?

Inquiry submitted 01/23/2018

Response #1:Submitted for consideration.
Response posted 01/23/2018




Inquiry #20: Caltrans specified the manufacturer Taylor Devices Inc., for the viscous dampers which has an approved submittal drawings that appears to be authorized by the State of California Department of Transportation DES Structure Design for all the different types of dampers which all have specific designated dimensions.
Were those dimensions based on actual field measurements or is the contractor required to verify those dimensions with a possibility to change the approved submittal dimensions if they are different?

Inquiry submitted 01/23/2018

Response #1:Submitted for consideration
Response posted 01/23/2018


Response #2:The new dampers are based upon the original damper dimensions. The Contractor must still verify all field dimensions.
Response posted 01/24/2018




Inquiry #21: Refer to plan set. The current set of drawings does not include any details of how to access the towers at W2, W3, W5 and W6. Please provide as-built information for the towers which includes, but not limited to the following: existing dimensions, clearances to obstructions, fall hazard heights, confined space limitations, existing ladders and platforms, etc. This information is necessary in order properly cost estimate the required access systems to facilitate safe work on the backside of the damper brackets.

Inquiry submitted 01/24/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:Refer to Section 2-1.06B, "Supplemental Project Information," of the Revised Standard Specifications for how to obtain as-built drawings.
Response posted 01/30/2018


Response #3:Pictures and sheets with column details can be downloaded below (~14MB).

http://www.dot.ca.gov/dist4/construction/contracts/04-3G4424/pics/pics_3G4424.zip
Response posted 01/31/2018




Inquiry #22: Steam Cleaning Limits: Refer to Sheet 9 of 29. Notes provide an approximate quantity of 50 sq.ft for chord/bracket to be steam cleaned. Specification 59-1.03C(6) states contractor must steam clean all existing dirt, grease, existing damper fluid leakage, and other foreign material that present a potential slip hazard adjacent to the existing damper locations, such as but not limited to the existing chords members, brackets, deck surfaces, walkways or platforms, barrier rails and access ladders. As described in the special provisions, this could be an excessively larger area well in excess of the 50 sq.ft per chord/bracket. 1. Would Caltrans consider an allowance item to cover costs for additional steam cleaning outside the limits of the chord and bracket?
2. The steam cleaning limits only show one face or side. As it pertains to the chord and bracket, shall contractor assume cleaning two or four side of the chord/bracket?
3. If damper fluid or other residue found on the inside of the chord member, is expectation to steam clean inside surfaces of the chord?

Inquiry submitted 01/24/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:1. Please bid per the current contract documents.
2. Please bid per the current contract documents.
3. No. Please bid per the current contract documents.

Response posted 01/26/2018




Inquiry #23: Existing Damper Pin Connection: Contract drawings do not include an existing detail of how the dampers are connected to the pin plates of the brackets. Contractor needs to know the existing pin/bolted assembly in order to cost estimate. Please provide dimensions, details and material grade for these bolts.
Inquiry submitted 01/24/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:The damper manufacturer will provide the new pins and hex nuts with each new damper.
Response posted 01/26/2018




Inquiry #24: Existing Bolt Assemblies: The contract drawings appear to depict hex head bolted assemblies. Although, per the mandatory job walk and photos provided in the Informational Handout, it appears the existing bolted assemblies could be "button head" tension control (TC) bolted assemblies. A hex head bolt can be accessed from the bolt head or nut side of the assembly. A TC bolt can only be accessed from the nut side.
What shall the contractor assume in its bid as this could affect the costs of how the existing bolts are removed?

Inquiry submitted 01/24/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:There is a mixture of Hex Head and TC Button Head bolts. Please bid per the current contract documents and walk through observations.
Response posted 01/26/2018




Inquiry #25: Dampers #3 & 4 and Traffic Barrier: per the photos in the informational handout, Dampers #3 and 4 have steel braces located above them that appear to support the existing traffic barrier. Assumption here is the previous retrofit contractor installed the damper first, then installed the traffic barrier and braces. The contract drawings do not show these braces, nor if or how they are to be removed and replaced to facilitate the damper work.
Will these braces or the entire traffic barrier require removal and re-installation? Please advise.

Inquiry submitted 01/24/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 02/01/2018


Response #3:Refer to Addendum No 4, dated February 13, 2018. Section 55-4.03 Has been revised to include temporary removal of the traffic barrier.
Response posted 02/14/2018




Inquiry #26: Existing Utilities: refer to the informational handout. Refer to photos for Dampers #8, 9, 11 as an example. Please note there appears to be a significant amount of utilities and bridge facilities around this damper, and maybe more. We are unaware of any details on the plans or specific scope of work of how to work safely around these utilities while removing and replacing the dampers. Shall the Contractor assume there is no scope, no safety risks and no costs associated with relocating or shutting down existing utilties? Please clarify.
Inquiry submitted 01/24/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:Refer to section 5-1.36 "Property and Facility Preservation" of the 2015 standard Specifications.
Response posted 02/16/2018




Inquiry #27: Pier W1 Interior Dampers: per the informational handout, dampers are installed thru existing hole in the floor beam. There appears to be limited access between the floor beam and rocker post to access damper bracket and pin. Refer to Sheet 16/29. Please provide existing dimensions between Pier W1, floor beam, rocker post, diameter of hole in floor beam web and any other dimensions Contractor will need to verify access constraints.
Inquiry submitted 01/24/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:Please bid per the current contract documents.
Response posted 01/30/2018




Inquiry #28: Tower Interior Dampers: per IH and photos for dampers #19 and 20 (as an example), there appears to be existing bridge members that restricts the removal and replacement of the dampers. This bridge metal is not identified on the plans to be removed and replaced to facilitate removal and installation of the dampers. Please provide drawings and details specific to bridge structure that needs to be removed and replaced to facilitate removal and installation of new dampers.
Inquiry submitted 01/24/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:Refer to section 55-4.03 of the Special Provisions, (paragraph 1), the as-built drawings, and photos in the Information Handout.
Response posted 02/05/2018




Inquiry #29: During the Pre-Bid Meeting site visit several 15 gal plastic drums were present with differing levels of waste fluid. Is removal and disposal of the drums and their contents part of this Contract? If not, will the drums be removed by maintenance prior to the Contractor mobilizing?
Inquiry submitted 01/25/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:Yes, contractor shall remove and dispose the 15 gal plastic drums.
Response posted 01/25/2018




Inquiry #30: Will the existing maintenance travelers be made available for use by the Contractor for this Contract?
Inquiry submitted 01/25/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:No, the travelers will not be available to the Contractor.
Response posted 01/25/2018




Inquiry #31: During the Pre-Bid Meeting the presenter mentioned a potential time limit that the dampers can be removed before a new damper is required to be installed. Due to the required bracket re-fabrication as well as the core and bond dowel activities, weather, holiday lane closure constraints, and agency designated non-Work Days it seems likely that a damper may remain disengaged for multiple days. Will a time limit be imposed for damper installation following removal?
Inquiry submitted 01/25/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:There is no time limit specified for damper installation following removal.
Response posted 02/05/2018




Inquiry #32: Special provision 60-2.02C(1) requires, "Before disposing the existing viscous dampers, discharge internal viscous fluid in a safe manner."

During the Pre-Bid Meeting it was mentioned that the viscous fluid in the existing dampers is under pressure. Please provide further detail for the safe discharge of the internal viscous fluid and how to release any stored energy internal to the existing dampers.

Inquiry submitted 01/25/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:Details and tool to discharge the existing dampers in a safe manner are provided by the damper replacement manufacturer.
Response posted 01/26/2018




Inquiry #33: Please provide the safety data sheets (SDS) or material safety data sheets (MSDS) for the viscous fluid. Is the internal viscous fluid in the existing dampers a hazardous waste regulated under the Resource Conservation and Recovery Act (RCRA)? What if any of the requirements of Specification 14-11 will apply for handling and disposal of the fluid?


Inquiry submitted 01/25/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:Fluid in the dampers are silicon fluid. Taylor would have the MSDS and the chemical composition.
Response posted 02/02/2018




Inquiry #34: Refer to Sheet 20/29 Section B-B of the W4 bracket to be removed.
1. Should Section B-B be rotated 90 degrees as the bracket is currently installed horizontal?
2. Provide additional dimensions (ie. plate thicknesses, stiffener dimensions, pin plate dimensions, etc.) necessary for the contractor to estimate the weight of the brackets.
3. Existing bracket is connected with 1 1/4" threaded rods. What is the existing hole diameter on the base plate? A standard +1/16" on the hole diameter could prove difficult to remove the bracket. If hole diameter is +1/8"-1/4" oversize, the bracket could be removed quite easily.

Inquiry submitted 01/25/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:1. Please bid per the current contract documents.
2. Please refer to the as-built drawings.
3. Please refer to the as-built drawings.

Response posted 01/30/2018




Inquiry #35: Refer to Sheet 21/29 View A-A. The detail states to reattach existing bracket clevis to new bracket with new A325 bolts. Please clarify the following:
1. Plan view above does not show the A325 bolts to be removed and replace with new bolts. Please update plan view detail accordingly.
2. Does the top and bottom faces of the L angles which connect to the clevis plate require spot blast clean and paint undercoat prior to reconnection to the new bracket? Or does the contractor assume the existing undercoat will meet the project specifications?

Inquiry submitted 01/25/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:1. Detail A-A is correct. Please bid per current contract documents.
2. Refer to the table in section 59-2.01A(1) of the special provisions for existing damper brackets to be reconstructed.

Response posted 02/01/2018




Inquiry #36: Bolted Connections and Faying Surfaces: Please clarify contract requirement:
1. Are all A325 and A490 HS bolted connections considered slip critical or bearing connections? If so, provide reference in plans and specs.
2. Are all existing and new steel faying surfaces and surface preparations required to be prepared for slip critical connection or bearing connections? If so, provide reference in plans and specs.
3. Is the paint system as specified in Section 59 'Structural Steel Coatings" certified for slip critical HS bolted connections or note? If so, provide reference in plans and specs.

Inquiry submitted 01/25/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:1. Tension all HS bolted connections as lip critical. Refer to section 55-1.02E(6)(c) of the 2015 Standard Specifications.

2. Refer to paragraph 1 of section 55-1.02E(6)(c) of the 2015 Standard Specifications.

3. Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.


Response posted 02/01/2018


Response #3:1. Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.

2. Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.

3. Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.

Response posted 02/01/2018


Response #4:1. Refer to Addendum No 4, dated February 13, 2018. Section 55-1.02E(6)(c) of the Special Provisions has been modified to define the HS bolted joint type.

2. Refer to Addendum No 4, dated February 13, 2018. Section 55-1.02E(6)(c) of the Special Provisions has been modified to define the HS bolted joint type.

3. No. Refer to Addendum No 4, dated February 13, 2018. Section 55-1.02E(6)(c) of the Special Provisions has been modified to define the HS bolted joint type.
Response posted 02/14/2018




Inquiry #37: Refer to Sheet 20/29, Detail A. Details specifies the spot blast clean and paint undercoat limits on the west and east faces of W4 only. Please clarify the following:
1. Blast clean and undercoat limits are not shown for the new brackets being installed on the north and sides (interior and exterior) of W4. Shall the contractor assume blasting and undercoating under the base plate of new brackets as shown on Sheet 21/29 'Upper Damper Bracket (New Plan View)'?
2. Refer to Sheet 21/29 'Detail A'. Blast clean and undercoat limits are not shown for the west and east faces of the floorbeam where the two new brackets bolt together. Shall the contractor assume blasting and undercoating the floorbeam where the two brackets connect?

Inquiry submitted 01/25/2018

Response #1:Submitted for consideration.
Response posted 01/25/2018


Response #2:1. No. Please bid per the current contract documents.
2. No. Please bid per the current contract documents.

Response posted 01/30/2018




Inquiry #38: Contract Drawing Sheet 2 identifies that, "All components of the damper system which include brackets, and internal struts are considered to be FRACTURE CRITICAL MEMBERS (FCM)." Item 2 in Special Provision 55-1.02D(2) requires fracture critical members, "Be produced by a fabricator certified under AISC Certification Program for Steel Bridge Fabricators, Intermediate Bridges with Fracture-Critical Members."

Is a facility certified as AISC Certified Bridge Fabricator - Intermediate (Major) sufficient or is an AISC Fracture Critical Endorsement required.




Inquiry submitted 01/25/2018

Response #1:Submitted for consideration.
Response posted 01/26/2018


Response #2:AISC Certified Bridge Fabricator - Intermediate (Major) is sufficient to meet this fabricator requirement of the Special Provisions.
The requirements for fracture critical members of AWS D1.5 (Clause 12) apply.


Response posted 01/31/2018


Response #3:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per the current contract bid documents.
Response posted 02/01/2018


Response #4:Refer to Addendum No 4, dated February 13, 2018. Section 55-1.02D(2), item 2, of the Special Provisions has been clarified.
Response posted 02/14/2018




Inquiry #39: Refer to Sheet 24/29, Detail A. Detail specifies spot blast clean and paint undercoat limits for the tower bracket to be removed and replaced. Scope for blasting and painting on the exterior of the tower is clearly shown. Please clarify the blasting, cleaning, undercoat and top coat requirements for the interior of the tower where the existing fill plate (shown to remain) and A490 nuts, washers and thread stickout are shown. Refer to 'Typical Exterior Tower Bracket (Lower Chord) - Plan' details showing interior of tower and fill plate.
Inquiry submitted 01/26/2018

Response #1:Submitted for consideration.
Response posted 01/26/2018


Response #2:Please bid per the current contract documents.
Response posted 01/30/2018




Inquiry #40: Refer to Sheet 26/29: The upper chord bracket at Tower 2 west side and Tower 6 east side requires re-bolting. Please clarify the following:
1. Note 1 states total of 4 brackets. Refer to Sheet 27/29. 'Damper Upper Bracket Detail' states total of 2. Please clarify total of amount of brackets to be re-bolted.
2. Work on this particular bracket makes no mention of 'clean and paint structural steel (existing bridge)' similar to the other brackets getting re-worked. Do these brackets require 'clean and paint structural steel (existing bridge)' or another form of paint system after new bolts are installed? If yes, does this apply to inside the tower as well to finish coat the nuts and washer of the new fasteners?

Inquiry submitted 01/26/2018

Response #1:Submitted for consideration.
Response posted 01/26/2018


Response #2:1) There are a total of 4 brackets (2 - 103D/L Brackets and 2 -103D/R Brackets). One of each type is installed at each Tower location. Please bid per the current contract documents.

2) Bracket is to remain attached. Only the bolts are to be replaced. Please bid per the current contract documents.
Response posted 02/05/2018




Inquiry #41: There are many bidder inquiries that remain to be addressed via addendum(s). Please advise, will the project bid opening be postponed?
Inquiry submitted 01/29/2018

Response #1:Submitted for consideration.
Response posted 01/30/2018


Response #2:Please see addendum No. 3
Response posted 02/13/2018




Inquiry #42: Regarding Special Provision 5-1.44 "Photo Identification System" under "The photo identification system must consist of the following:"

1.2 - What items are to be included in the audit log? Also, does "Full user" mean each user on the computer?
1.3 - Please provide criteria for what is being requested in "Administrator and user security".
1.7 - Will being able to edit the database file from within the card issuance software suffice?
1.8 - Will the ability to print multiple card templates meet the requirements?

3.7 - Please define what "True" means to the end user

Inquiry submitted 01/31/2018

Response #1:Submitted for consideration.
Response posted 01/31/2018


Response #2:1.2 Items for audit log:
1-Date ID was issued.
2-Expiration date
3-User name

1.3 Security for Administrator and user
1.7 Yes
1.8 Yes
3.7 It?s a feature of the card printer
Response posted 02/20/2018




Inquiry #43: During the Pre-Bid Meeting the presenter mentioned that Caltrans and Taylor Devices Inc. had conducted prototype testing for the new viscous dampers to be supplied in accordance with Special Provision 55-4 Viscous Dampers. Please provide the test results for this testing as well as any warranty concerns that may have resulted from the testing.
Inquiry submitted 01/31/2018

Response #1:Submitted for consideration.
Response posted 02/01/2018


Response #2:This information may be requested after bid award.
Response posted 02/02/2018




Inquiry #44: Special Provision 55-4.01D(3) WARRANTY requires, “Design the LMD such that field maintenance should not be required during the first 10 years of service life.” Please clarify what constitutes “field maintenance”.
Inquiry submitted 01/31/2018

Response #1:Submitted for consideration.
Response posted 02/01/2018


Response #2:Bid per the current contract documents.
Response posted 02/02/2018




Inquiry #45: Will rust on the active surface of the piston rod and any resulting defects in the damper caused by rust be considered a “Warranted defect” as described in Special Provision 55-4.01D(3) WARRANTY?

Specification 55-4.02D MATERIALS requires active surfaces of the piston rod to be nickel or chrome plated. The ASTM and AMS standards referenced in the specification for compliance provide no warranty assurances for the life expectancy of the coatings. Given the exposed, salty, humid environment where the dampers will be utilized it is possible that the rods will begin to rust within the 25 year warranty period defined in Special Provision 55-4.01D(3) WARRANTY.

Inquiry submitted 01/31/2018

Response #1:Submitted for consideration.
Response posted 02/01/2018


Response #2:Yes.
Response posted 02/02/2018




Inquiry #46: The plans and specifications make no mention of laydown area, jobsite area or any property as provided by the Owner (ie. Caltrans) for the contractor's use on this project. Is the expectation for the contractor to provide its own property for staging equipment, materials, office space, hazardous waste, containment facilities (if needed), waste management and any other facilities to administer this contract?
Inquiry submitted 02/06/2018

Response #1:Submitted for consideration.
Response posted 02/06/2018


Response #2:Contractor is responsible to arrange their own storage or equipment, materials and other items as needed.
Response posted 02/06/2018




Inquiry #47: For example, if you refer to the informational handout and the photos for Damper #19, the existing damper (typical at other dampers as well) has a splice made up of pipe flanges and bolts. As shown at Damper #19, it appears the pipe splice is located between the existing rail beams on the bridge running transverse to the dampers. Questions:
1. Was this splice used to facilitate installation of the existing damper on the interior chord and in between the existing transverse beams on the bridge? Meaning was the damper installed in two pieces, then bolted up at the flanges in the field?
2. The new dampers as detailed on Sheet 10/29 do not show these spliced connections. Are the new dampers designed and manufactured without these spliced connections?
3. If new dampers are designed continuous without the spliced connection, why have the splices been eliminated?

Inquiry submitted 02/12/2018

Response #1:Submitted for consideration.
Response posted 02/13/2018


Response #2:1. No. Contact the damper manufacturer for further information regarding the splices.

2. Contact the damper manufacturer for further information regarding the splices.

3. The damper manufacturer determines if a splice is needed. Contact the damper manufacturer for further information regarding the splices.
Response posted 02/14/2018




Inquiry #48: The last paragraph of Special Provision 55-4.02B states, "You must store leak detection system at the location specified by the Engineer."
Additionally,
The last paragraph of Special Provision 55-4.03 requires, "Install leak detection sensors after installation of viscous dampers. A qualified representative of the manufacturer must be present during the installation of leak detection sensors for the first 10 dampers. The representative must be available for consultation during the remaining installations."

1. Please confirm that the Contractor is to include in the bid for this Contract the installation of the leak detection system.
2. Provide an installation location for the 8 control panels.
3. What are wiring and conduit requirements for the sensors.
4. Identify the power source for the 8 control panels.

Inquiry submitted 02/14/2018

Response #1:Submitted for consideration.
Response posted 02/14/2018




Inquiry #49: Question is a follow up to Q&A #12 and response. Response to #12 confirmed the damper brackets to be reconstructed must comply with clean and paint structural steel (existing bridge). Work description specifies steam clean, blast clean to bare metal, and paint all steel surfaces. Please confirm the following:
1. The plans show the entire chord bracket to be removed, cleaned and painted. The entire bracket assembly consists of 11 pieces of steel members bolted up at various connection locations. The plans do not show the existing A325 fasteners connecting the L angle, vertical 1/2" plate and pin plates to be removed and replaced. Is the intent to steam and blast clean, prime and finish coat the chord bracket as a completed assembly? If galvanized bolts are to remain, the galvanized coating would be damaged by the blast cleaning process. Also, there is limited access and space to properly blast clean the vertical inside surfaces of the plates.
2. Is the intent to completely disassemble the chord bracket, remove the existing bolts, steam clean, blast clean all 11 steel members to bare metal, undercoat, reassemble with new A325 fasteners to match, and finish paint the reconstructed bracket?

Inquiry submitted 02/14/2018

Response #1:Submitted for consideration.
Response posted 02/14/2018




Inquiry #50: Please clarify the scope of blasting/coating of the chord brackets shown typically in View A-A, Sht. 7/22, View C-C, Sht. 11/22 and Sect. A-A, Sht. 11/22. In each of these views, the sheet legend that shows the portion to be removed to facilitate damper installation does not call for any blasting/coating of the portion removed. However, your response to inquiry #12 and the table in paragraph 1 of sect. 59-2.01A(1) seem to indicate otherwise. In the table, "for all existing damper brackets to be reconstructed" the work description says "Steam clean, blast clean to bare metal, and paint all steel surfaces." however, the last column pay item is "Clean and paint structural steel (existing bridge)" and does not include spot blast clean and paint undercoat. This is confusing to us. Do the portions of the existing brackets that are removed to facilitate damper installation need ANY blasting, undercoating or top coating? Or, Is it the expectation that the portions removed will be entirely blast cleaned, undercoated and top coated? If so, do these portions need to be entirely disassembled, prior to blasting? Or are they to be blasted as a complete assembly?
Inquiry submitted 02/16/2018

Response #1:Submitted for consideration.
Response posted 02/16/2018




Inquiry #51: Details for the chord brackets (Detail A, Sht. 7/22, for example) direct us to spot blast the bracket's upper and lower plates on the top, bottom and sides. Disregarding the sides, each surface shown to be blasted (the cross-hatched area) is approx. 5 sf. There are 4 surfaces at each location (top plate upper surface, top plate lower surface, bottom plate upper surface and bottom plate lower surface) or 4 x 5 sf = 20 sf per location. There are 46 locations where this occurs, per the chart on Sht. 4/22, which would total 920 sf (not counting the blasting that occurs under the new W4 brackets). Bid Item 18, Spot Blast Clean and Paint Undercoat is for a quantity of 480 sf. Why the large discrepancy?
Inquiry submitted 02/16/2018

Response #1:Submitted for consideration.
Response posted 02/20/2018


The information provided in the responses to bidder inquiries is not a waiver of Section 2-1.07, "JOB SITE AND DOCUMENT EXAMINATION" of the Standard Specifications or any other provision of the contract, nor to excuse the contractor from full compliance with the contract. Bidders are cautioned that subsequent responses or contract addenda may change a previous response.


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