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Inquiry #1: Plan sheet 11 of 11 "Miscellaneous details" is missing in the downloadable file. Can you please provide this?
Inquiry submitted 11/20/2017

Response #1:submitted for consideration
Response posted 11/27/2017


Response #2:Please see Addendum No.1.
Response posted 12/21/2017




Inquiry #2: Please indicate if the material from excavation can be used for backfill
Inquiry submitted 11/20/2017

Response #1:Tested excavated materials may be used if they meet the requirements per the contract Special Provisions, and Caltrans Standard Specifications 2015, for that material to be incorporated in the project.
Response posted 11/27/2017




Inquiry #3: In Sheet 27/35 the "cable yield indicator" shows a note : "REDUCED SECTION WALL THICKNESS (REFER TO SPECIFICATIONS)" However in the specs there is no mention to this wall thickness, can you please provide this thickness? Same question for sheet 35/35. Please advise
Inquiry submitted 11/20/2017

Response #1:Please bid per current contract documents. Reference section 60-4.09B(2)(c)(i), "General," of the Standard Specifications 2015 for the reduced section wall of the cable yield indicator.
Response posted 11/27/2017




Inquiry #4: Are we to assume that columns will require Structural backfill that will have to be imported
Inquiry submitted 11/27/2017

Response #1:submitted for consideration
Response posted 11/27/2017


Response #2:Please reference Section 19-3.03E, “Structure Backfill,” 19-3.03E(1), "General," of the Standard Specifications 2015. Imported borrow is shown on the Bid Item List, you may use the imported borrow as part of the structure backfill if it complies with the specifications for structure backfill.
Response posted 11/29/2017




Inquiry #5: Please indicate if there is a final elevation that OG needs to be graded to after Column work is to be done
Inquiry submitted 11/27/2017

Response #1:submitted for consideration
Response posted 11/27/2017


Response #2:Please bid per current contract documents. There are no changes to existing grades.
Response posted 12/04/2017




Inquiry #6: Please indicate if there will be a staging area in close proximity at both locations
Inquiry submitted 11/27/2017

Response #1:submitted for consideration
Response posted 11/27/2017


Response #2:There are no planned staging areas provided. Please bid per current contract documents.
Response posted 12/21/2017




Inquiry #7: Please indicate that Caltrans is expecting a large amount of Export from the San Gorgonio Bridge and is that to be paid under Structure Excavation
Inquiry submitted 11/27/2017

Response #1:submitted for consideration
Response posted 11/28/2017


Response #2:Please see Bid items List, Item Number 14, Structure Excavation (Bridge), and Standard Specifications 2015, Section 2-1.07 Job Site and Document Examination.
Response posted 12/21/2017




Inquiry #8: Addendum #1 ebs file is not listed on the bid express website.
Inquiry submitted 11/28/2017

Response #1:submitted for consideration
Response posted 11/28/2017


Response #2:Your concern has been resolved.
Response posted 11/29/2017




Inquiry #9: Were will the Double Midwest Guard Railing System be paid for? Thanks
Inquiry submitted 11/30/2017

Response #1:submitted for consideration
Response posted 11/30/2017


Response #2:The Double Midwest Railing System pay quantity is included under Item 38.
Response posted 01/10/2018




Inquiry #10: 1. Note 14 on sheet 10 of 11 states that the transverse wrapping for the columns shall extend a minim of 12” past the starting point of the initial wrap. Does this conflicts with the statement under section 60-3.06C(3) which states that a minimum 18” overlap is to be provided, or are these two requirements describing different types of overlaps (i.e. at one layer locations versus multiple layer locations). Please clarify.
2. Do bidders need to use Cal Trans Pre-Qualified Composite Jacket Systems? If so, please confirm that the current Cal Trans Pre-Qualified Composite Jacket System List is dated April, 2016.
3. It does not appear that the GFRP material used as basis for design is listed in the Cal Trans Pre-Qualified Composite Jacket System list. Please confirm that GFRP material needs to be from the Cal Trans Pre-Qualified Composite Jacket Systems list.
4. Section 60-3.05B Materials, line 5, states: “Use only 1 system for a structure.” Are two Cal Trans Pre- Qualified systems from the same manufacturer allowed to be used if systems are compatible.
5. Since bids are to be based on a unit price basis according to page 1 of the Notice to Bidders document, may bidders use their own calculated quantities or do they have to use the estimated quantity provided in the notice to bidders which is meant for informational purposes only?

Inquiry submitted 11/30/2017

Response #1:submitted for consideration
Response posted 12/04/2017


Response #2:1. Bid per current contract documents. Refer to Section 5-1.02 “Contract Components,” of Standard Specs, if there is a discrepancy exists between the Special Provisions and project plans, the requirements in the Special Provisions governs over project plans’. Overlap length must be per manufacturer's instructions, but not less than 18 inches.

2. Bid per current contract documents. Refer to Addendum No. 1, dated November 22, 2017, Section 60-3.06B, “Materials,” 60-3.06B(2), “CFRP,” of the Special Provisions, select a CFRP system from the Authorized Material List for Prequalified Composite Column Jacket Systems.
Yes, the current Authorized Material List for Prequalified Composite Column Jacket Systems is dated April, 2016.

3. Bid per current contract documents. Refer to Addendum No. 1, dated November 22, 2017, Section 60-3.06B, “Materials,” 60-3.06B(3), “GFRP,” of the Special Provisions, sacrificial GFRP system must be E-Glass material and need not be from the Authorized Material List for Prequalified Composite Column Jacket Systems.

4. Bid per current contract documents. Refer to Addendum No. 1, dated November 22, 2017, Section 60-3.06B, “Materials,” 60-3.06B(2), “CFRP,” use only 1 system for a structure.
No, two systems cannot be used for a structure.

5. Bid per current contract documents. Refer to the Special provisions, the Bid Item List, item 31, “Composite Column Strengthening” is a final pay item.
Reference section 9-1.02C, “Final Pay Item Quantities” of the standard specifications, for a final pay item, accept payment based on the Bid Item List quantity, regardless of the actual quantity used unless dimensions are changed by the Engineer.


Response posted 12/04/2017




Inquiry #11: Traffic charts on Special Provision indicate lane closures may only occur during night work hours, yet Environmental Stewardship section indicates work will only be conducted during daylight hours within Species Protection Area 1, which is the Entire Project. Please clarify.
Inquiry submitted 12/01/2017

Response #1:submitted for consideration
Response posted 12/04/2017




Inquiry #12: Please indicate steel quality required for bearing bars in sheet 25 of 35. Thank you
Inquiry submitted 12/02/2017

Response #1:submitted for consideration
Response posted 12/04/2017


Response #2:Bid per current contract documents.
Reference Section 55-1.02D, “Materials,” Section 55-1.02D(1), “General,” of the Standard Specifications, Section 55-1.02D(1) of the Special Provisions, sheet 21 of 35 of the contract plans, “Index to Plans,” “General Notes, Load and Resistance Factor Design,” and sheet 25 of 35 of the contract plans, “Cable Hinge Restrainer with Hinge Seat Extender Details No. 1.”
Bearing bar is a part of the seat extender and must be structural steel.

Response posted 12/06/2017




Inquiry #13: Can CALTRANS make available to bidders the as-build drawings or project drawings of the existing bridge?
Inquiry submitted 12/02/2017

Response #1:submitted for consideration
Response posted 12/04/2017


Response #2:Please see Addendum No. 4.
Response posted 12/22/2017


Response #3:: Please see Standard Specifications 2015, 2-1.06B Supplemental Project Information.
Response posted 12/22/2017




Inquiry #14: In regards to the “Special Provisions, Section 60-3.06 – Composite Column Strengthening” provided with Addendum 1 (dated 11/22/17), please note below:

a. 60-3.06B(2): In the provided table regarding the CFRP material properties, the “Dry fiber thickness per layer, in” is given as 0.0065in. This represents a very thin CFRP system with a rough weight of 9 ounces per square yard per layer (9 oz/sy) and 0.02 inches thick per cured laminate per layer. Typically, CalTrans approved and listed CFRP systems are provided in either approximately 18 oz/sy or 36 oz/sy fabric per layer fabric weight (0.04 inches or 0.08 inches thick cured laminate per layer, respectively).

Is it allowed to use either the 18 oz/sy or 36 oz/sy CFRP materials? If so, the current detailed layers would be reduced as such due to increased fiber thickness per layer (in reference to table provided on Sheet 28 of 35 in the plans):

Column Width “D” N1 layers N2 layers
24” 4 (18 oz/sy), 2 (36 oz/sy) 2 (18 oz/sy), 1 (36 oz/sy)
36” 6 (18 oz/sy), 3 (36 oz/sy) 3 (18 oz/sy), 2 (36 oz/sy)

Note that the overall bid quantity of 170,000sf would need to be adjusted based on the layers required above for either of the 18 oz/sy or 36 oz/sy CFRP system.

Note also that the labor and cost for this application would be significantly reduced with the reduction of CFRP layers required.

b. 60-3.06B(3): The GFRP is required with a minimum fabric weight of 27 oz/sy. It is assumed that this is the fabric weight required for each of the two layers required overall all columns. However, the table provided in this section gives a “Dry fiber thickness per layer” of 0.0065in – which as per the above, would equate to a 9 oz/sy fabric weight per layer of GFRP. Is each layer of GFRP required to be 27 oz/sy or 9 oz/sy fabric weight per layer? – are two layers of GFRP still required? Please verify.

c. 60-3.06C(2): In regards to Item 3 under “At the time of installation”, it reads that a surface profile of CSP 3 is required for bond critical application. Due to the full CFRP wrapping for confinement of the columns, can this application be considered as “contact critical” in lieu of “bond critical”? If so, this would eliminate the CSP 3 requirement and the columns would need to be cleaned and free of any dirt, debris, etc. Please advise.

d. It is noted that Section 60-3.06C(4) – Cleaning and Painting has been eliminated from the Composite Column Strengthening special provision. What is the final coating required for the installed FRP systems? – thickened epoxy coating? – is there any other coating required? Please advise.

e. 60-3.06D: In regards to payment, will the FRP systems be field measured of a single sheet or layer of material? – for both the CFRP and GFRP? If so, the bid quantity would need be adjusted if the 18 oz/sy or 36 oz/sy material weight for the CFRP is selected.

Inquiry submitted 12/04/2017

Response #1:submitted for consideration
Response posted 12/13/2017


Response #2:Please see Addendum No. 4.
Response posted 12/22/2017


Response #3:a) Bid per current contract documents.
Reference Addendum No. 4, dated December 21, 2017, Section 60-3.06B(2), “CFRP,” of the Special Provisions and plan sheet no. 28 of 35. Yes, an alternative other than the 0.0065” dry fiber thickness per layer described can be used.
Reference paragraph 7 of Section 9-1.03, “Payment Scope,” and Section 9-1.02C “Final Pay Item Quantities,” of the Standard Specifications. The Department pays based on the bid item no 31 COMPOSITE COLUMN STRENGTHENING, 170,000 SQFT. If you choose to use an alternative, there will be no adjustment in the quantity.

b) Bid per current contract documents. Reference Addendum No. 1, dated November 22, 2017, Section 60-3.06B(3), “GFRP,” of the Special Provisions, and plan sheet no. 28 of 35. 0.0065” is the required dry fiber thickness per layer of GFRP, and is not the layer’s thickness. The GRFP is required to have a minimum fabric weight of 27 oz/sq yd. There are 2 layers of GFRP required as shown.

c) Bid per current contract documents. Reference Addendum No. 1, dated November 22, 2017, Section 60-3.06C(2), “Surface Preparation,” of the Special Provisions. CSP 3 is required.

d) Bid per current contract documents. Reference Addendum No. 1, dated November 22, 2017, Section 60-3.06C(3), “Applying CFRP and GFRP sheet,” of the Special Provisions and plan sheet no. 28 of 35. Coat the sacrificial GFRP exterior surface with a final coat of resin.

e) Bid per current contract documents. Reference Addendum No. 1, dated November 22, 2017, Section 60-3.06D “Payment” of the Special Provisions. The payment quantity of composite column strengthening is the area measured by the square foot of a single layer sheet (0.0065” dry fiber thickness).

Please see response (a) regarding the bid quantity adjustment.

Response posted 12/22/2017




Inquiry #15: The drawings (sheet 28/35) and specs section 60-3.06 show a certain number of layers of CFRP and a certain thickness per layer (0.0065 in) . Some of the CFRP systems from the CALTRANS Authorized Material List are available in a different thickness. Would CALTRANS allow the contractor to apply a different number of layers in case that a system with different thickness is selected, providing that the total strength of the casing remains the same, and all other requirements of the material are fulfilled?
Inquiry submitted 12/04/2017

Response #1:submitted for consideration
Response posted 12/04/2017


Response #2:Please see Addendum No. 4.
Response posted 12/22/2017


Response #3:Please see responses to Inquiry #14.
Response posted 12/22/2017




Inquiry #16: Referring back to inquiry #14, if Cal Trans will indeed allow a different CFRP material (with a different number of layers) listed in the Cal Trans Pre-Qualified Composite Jacket System list, how should unit pricing be communicated in order to properly adjust quantities for change order (add/deduct) scope of work?
Inquiry submitted 12/11/2017

Response #1:submitted for consideration
Response posted 12/11/2017


Response #2:Please see Addendum No. 4.
Response posted 12/22/2017


Response #3:Please see responses to Inquiry #14 regarding the quantity adjustment for bid item no 31 COMPOSITE COLUMN STRENGTHENING. The Department cannot advise you on the unit price adjustment.
Response posted 12/22/2017




Inquiry #17: Per the revised specification section 60-3.06B(2) CFRP, authorized contactors may potentially use composite systems in their bid with a "composite laminate thickness of 0.08 inch per layer, if the 36-oz-per-square-yard..." system is used. In lieu of this addition and to ensure competitiveness of bid, can contractors be approved to use the MasterBrace FIB 600/50 CSF system which is equal or greater to other approved systems on the Pre Qualified Composite Column Jacket System? If the answer is no, can the material be accepted for bid conditional upon BASF submitting any and all required laboratory testing through Caltrans immediately?
Inquiry submitted 01/04/2018

Response #1:Please bid per current contract documents. Reference Addendum No. 4, dated December 21, 2017. Any alternative systems used in the contract must be on the Authorized Material List.

If you want to get on the Authorized Material List, please submit your request using the following:

http://www.dot.ca.gov/aml/

Response posted 01/09/2018


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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