Viewing inquiries for 07-288014

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Inquiry #1: Ramp closure chart No. R-07 does not provide enough hours to construct the ramp termini (Structural Section 8). The entire ramp needs to be closed for an extended period of time to complete the excavation, base, lean+cure and PCC+cure. It is not possible to safely construct the ramp termini with only one lane closed. Will Caltrans provide special closure times for this work?
Inquiry submitted 08/09/2013

Response #1:Structural Section 8 in question is 0.2' HMA and has nothing to do with the curing time.
Response posted 08/09/2013




Inquiry #2: Layout sheets L-24 and L-25 show a #3 cross section 10’ wide on the outside shoulder of westbound 210. #3 cross section is described as individual slab replacement yet summary of quantities sheet Q-1 does not reflect this quantity. Please clarify.
Inquiry submitted 08/19/2013

Response #1:Please see Addendum #2 issued today, September 16, 2013.
Response posted 08/19/2013




Inquiry #3: Special Provisions page 78 calls out for “preformed compression seal in isolation joints”. Will the owner allow a liquid joint sealant as an alternative to reduce cost?

Inquiry submitted 08/19/2013

Response #1:NO.
Response posted 08/19/2013




Inquiry #4: Section 40-4 "JPCP RCC", subsection 40-5.01A states that, "Section 40-4 applies". Section 40-4 is titled "Jointed Plain Concrete Pavement with Rapid Strength Concrete". What part of Section 40-4 applies to Roller Compacted Concrete?
Inquiry submitted 08/19/2013

Response #1:Please see Addendum #2 issued today, September 16, 2013.
Response posted 08/19/2013




Inquiry #5: Section 40-5 "JPCP RCC", subsection 40-5.02B states, "Concrete for JPCP RCC must comply with Section 90-6."

Section 90-6 of the Standard Specifications is "Reserved" and there is no revised Section 90-6 in the RSS's. What does Section 90-6 refer to and in what way is RCC to comply to this section?

Inquiry submitted 08/19/2013

Response #1:Please see Addendum #2 issued today, September 16, 2013.
Response posted 08/19/2013




Inquiry #6: Section 40-5 "JPCP RCC", subsection 40-5.02D states, "For surface lift use the 1/2-inch or the 3/4-inch maximum size grading."

Section 40-5.02D does not indicate what grading specification is being referenced. The combined gradations of Section 90-1.02C(4)(d) of the Standard Specifications do have a 1/2-inch maximum gradation shown. However, there is no 3/4-inch gradation. What gradation specifications are being referenced in Section 40-5.02D?

Inquiry submitted 08/19/2013

Response #1:Please see Addendum #2 issued today, September 16, 2013.
Response posted 08/19/2013




Inquiry #7: Caltrans usually has separate pay items for the isolation joint sealant and for the transverse/longitudinal joint sealant for the JPCP. This project only has a item for the isolation joint sealant (bid item #65). How is the transverse/longitudinal joint sealant to be paid?
Inquiry submitted 08/27/2013

Response #1:See detail as shown in sheet C-2, page 58 of the Contract Plans.
Response posted 08/27/2013




Inquiry #8: For Item 37 Salvage Metal Beam Guard Railing, are the posts, blocks, and rail to be salvaged per Section 15-2.03A of the Standard Specs. or will the posts and blocks fall under the Treated Wood Waste Item 24.
Inquiry submitted 09/03/2013

Response #1:As per section 15-2.03B of SSP, Salvage MBGR does not include the blocks and posts. Blocks and posts fall under the treated Wood Waste item.
Response posted 09/05/2013




Inquiry #9: We respectfully request a 2 week bid extension for this project. Thank you for your consideration.
Inquiry submitted 09/06/2013

Response #1:The Project will Bid as scheduled.
Response posted 09/09/2013




Inquiry #10: Section 40-5.03C(1)states, "Compact RCC to 98 percent relative compaction, minimum."

What test method is to be used for determining the maximum density of RCC?

Inquiry submitted 09/09/2013

Response #1:See section 6-3.05A
Response posted 09/09/2013




Inquiry #11: Section 40-5.01C requires that a RCC mix design with laboratory test reports be submitted.

Is there a required method to be used to determine Roller Compacted Concrete mix proportions, or will the contractor be allowed to use any recognized industry standard?

Inquiry submitted 09/09/2013

Response #1:Contractor may design the mix as long as the mix meets the requirement specified in 90-8.

SSP 90-8 is appending to the upcoming addendum.



Response posted 09/09/2013




Inquiry #12: Drainage System 11B crosses existing lanes 1 & 2, which must be removed. Are those slabs included in the quantity of individual slab replacement and if not how is that replacement paid?
Inquiry submitted 09/11/2013

Response #1:Yes, the qty is accounted for it already in the individual slab replacement (Sht Q-1).
Response posted 09/11/2013




Inquiry #13: During the Stage 2 & 3 construction, traffic will be running where the Type 60 Median Barrier is to be ultimately placed. Is a temporary structural section to be installed and then removed when the Barrier is installed or what is the intent?
Thank you,

Inquiry submitted 09/12/2013

Response #1:Correct. During Stage 4, the limit of temporary structural section “Type 6” underneath the limit of median barrier Type 60W Mod will have to be removed. As shown on plan sheet SCD-1, page 204 of the contract plan.
Response posted 09/12/2013




Inquiry #14: Your response to inquiry #7 tells us to see detail as shown on sheet C-2, page 58 of the contract plans. On this sheet their is a detail for a contraction joint. The detail shows no joint sealant in the contraction joint. The standard plans call for joint sealant in the contraction joints. I would think we are to follow the standard plans and place the joint sealant. Is joint sealant to be installed in the contraction joints? If so how is it to be paid for?
Inquiry submitted 09/12/2013

Response #1:Joint sealant is not required at the contraction joint for this project specific.
Response posted 09/12/2013




Inquiry #15: Item 81 "Staining Galvanized Surfaces" shows a quantity of 14,800 LF. But the specs say to stain all visible surfaces of MBGR. Items 95,96, and 97 have 27,900 LF of MBGR. So, does all the MBGR get stained or just some of it? Also, normally the end terminals are stained as well since otherwise the terminals will be galvanized and not stained and so will not match. Do the terminals all get stained or do none of them get stained?
Inquiry submitted 09/12/2013

Response #1:The limit of “Staining Galvanized Surfaces” as shown in the Contract Plan. Staining end terminals will be appended to the quantities.
Response posted 09/12/2013




Inquiry #16: Sections 40-4.01C(3) and 40-4.01D(4)provide for developing and implementing system for predicting stresses and strength during the first 72 hours. Please note that Hiperpav III used by concrete paving industry for predicting stresses and strength does not have inputs for rapid strength concrete and cannot be used for the purposes specified in the refernced sections. Please recommend methodologies known and acceptable to Caltrans for predicting the development of stresses and strength of rapid strength concrete suiatable for the purpose of cracking mitigation.

Inquiry submitted 09/12/2013

Response #1:The department does not recommend or approve any method for predicting cracking. The contractor must have a method that the contractor believes is adequate.
Response posted 09/13/2013




Inquiry #17: Ref Contract Item 81, Special Provisions and plans, and previous bidder inquiry # 15, including your posted reply to that inquiry.
1- Where as the Special Provision covering Item 81?
2- Where have you quantified or identified Item 81 in your plans?
3-Do the Steel Posts for Item 95 get stained?
4-Your reply to Bidder Inquiry # 15 is very confusing. Can you clarify it?

Inquiry submitted 09/13/2013

Response #1:1) On page 101 of the SSP, Section 59-11. 2) As shown on Q-7, pg 261 of the Contract Plans. 3) Yes as per SPP page 101, Para 59-11.01A, “Apply the stain to all visible galvanized surfaces of the metal beam guard rails.” 4)Quantities for staining end terminals will be issue as an addendum.
Response posted 09/13/2013




Inquiry #18: Ref Contract Item 81, Special Provisions and plans, and previous bidder inquiry # 15, including your posted reply to that inquiry.
1- Where as the Special Provision covering Item 81?
2- Where have you quantified or identified Item 81 in your plans?
3-Do the Steel Posts for Item 95 get stained?
4-Your reply to Bidder Inquiry # 15 is very confusing. Can you clarify it?

Inquiry submitted 09/13/2013

Response #1:
Response posted 09/13/2013




Inquiry #19: On sheet X-6, bottom view, it indicates isolation joints in the median on each side of the concrete barrier and also between the asphalt shoulder and concrete lane. There is normally not an isolation joint next to any type of asphalt. Is this the intent?
Inquiry submitted 09/13/2013

Response #1:No isolation is needed between the concrete and the AC pavement . Quantities will be adjusted by issuing an addendum.
Response posted 09/13/2013




Inquiry #20: Can you provide a drawing of what the isolation joint detail should look like with compression seal installed? The referenced standard isolation joint detail does not work for the compression seal material.
Inquiry submitted 09/13/2013

Response #1:A revised of a revised Std Plans pg 328 of the Contract Plan will be issued as an addendum.
Response posted 09/13/2013




Inquiry #21: Bid Item 67 provides for individual slab replacement with the use of rapid strength concrete (RSC). The following sections related to the quality control and testing of RSC in 2010 Standard Specification, Section 41-9 are reserved: Sections 41-9.01C(4)and 41-9.01D(3) - QC Plan;Section 41-901D(5)- Quality Control Testing. The Special Provisions don't provide a disclosure of QC testing requirements as well. Would the QC testing be required during individual slab replacement with RSC? If yes, please provide requirements for the scope and frequency.
Inquiry submitted 09/16/2013

Response #1:Contractor responsible for Q.C. including frequency to delivery material that meets Specs. When material does not meet Specs, the Agency rejects it. It is Contractor’s responsibility to control his quality to prevent agency need to step-in.
Response posted 09/16/2013




Inquiry #22: Inquiry #16: Sections 40-4.01C(3) and 40-4.01D(4)provide for developing and implementing system for predicting stresses and strength during the first 72 hours. Please note that Hiperpav III used by concrete paving industry for predicting stresses and strength does not have inputs for rapid strength concrete and cannot be used for the purposes specified in the refernced sections. Please recommend methodologies known and acceptable to Caltrans for predicting the development of stresses and strength of rapid strength concrete suiatable for the purpose of cracking mitigation.

Inquiry submitted 09/12/2013


Response #1:The department does not recommend or approve any method for predicting cracking. The contractor must have a method that the contractor believes is adequate.
Response posted 09/13/2013

Question: In your response you directed the contractor to use a method the contractor believes is adequate. That makes us think that Caltrans knows of such methods. We are cordially asking the preparer of the answer to refer to any methods known to Caltrans that may apply to RSC. This will allow for selecting one for the project.




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Inquiry submitted 09/16/2013

Response #1:Contractor’s must know how to perform work. Agency don’t direct means or methods.
Response posted 09/16/2013




Inquiry #23: Addendum #2, Section 90-8.01D(2) indicates that shrinkage tests are to be performed on specimens cut from the in-place RCC. There is no known method of testing specimens cut from hardened concrete. Additionally, Section 90-8.01D(2) does not indicated how specimens are to be cured, ages to be tested, or what the shrinkage tolerances are. Please provide additional information.
Inquiry submitted 09/16/2013

Response #1: Please Bid as is.
Response posted 09/16/2013




Inquiry #24: This inquiry is for the Minor Concrete Textured Paving Item. The concrete suppliers are indicating that a white cement might have to be used to match the Federal Color 36495. If we go this route, it will be very costly. Will Caltrans allow the contractor to match this shade of color with a natural grey colored concrete?
Inquiry submitted 09/16/2013

Response #1:Yes, the contractor can leave areas called out as Federal Color 36495 with a natural grey colored concrete. However, they must use the other stains for the barrier as called out in the plans.
Response posted 09/17/2013




Inquiry #25: Special Provisions Section 28-5 Concrete Base. Does this pertain to bid item 51 Lean Concrete Base and if so isn't LCB usually accepted on compressive strength rather that flexural?
Inquiry submitted 09/17/2013

Response #1:Section 28-5 Concrete Base does not pertain to bid item 51 Lean Concrete Base.
Response posted 09/17/2013




Inquiry #26: After reviewing the contract documents, we have discovered that the quantities of materials indicated on the Plans (Sheets 263 to 311) do not match the quantities of materials indicated on the materials schedules (sheets 312 to 314) in many instances. Please confirm that the materials schedules indicate the actual quantities of the materials to be installed on the Project. We will assume that the materials schedules (sheets 312 to 314) accurately represent the quantities of materials required to be installed.

2. After reviewing the contract documents, HLE has discovered that the types of materials indicated on the Plans (Sheets ___) do not match the types of materials indicated on the materials schedules (sheets ____) in many instances. Please confirm that the materials schedules indicate the actual types of materials to be installed on the Project. Until further notice, HLE will assume that the materials schedules (sheets__) accurately represent the types of materials required to be installed.

Inquiry submitted 09/18/2013

Response #1:Plan sheets 263 to 311 are paid under items No. 121,122, 123, 124 and 125.
Plan sheets 263-288 (Item No. 125)
Plan sheets 289-291 (Item No. 123)
Plan sheet 292 (Item No. 122)
Plan sheets 293-308 (Item No. 121)
Plan sheets 309-311 (Item No. 124),

Plan sheets 312-314 are not bid items- The quantities on these sheets are for information only and are not separate items.

Response posted 09/18/2013




Inquiry #27: After reviewing the contract documents, we have discovered that the types of materials indicated on the Plans (Sheets 263 to 311) do not match the quantities of materials indicated on the materials schedules (sheets 312 to 314) in many instances. Please confirm that the materials schedules indicate the actual types of the materials to be installed on the Project. We will assume that the materials schedules (sheets 312 to 314) accurately represent the types of materials required to be installed.

2. After reviewing the contract documents, HLE has discovered that the types of materials indicated on the Plans (Sheets ___) do not match the types of materials indicated on the materials schedules (sheets ____) in many instances. Please confirm that the materials schedules indicate the actual types of materials to be installed on the Project. Until further notice, HLE will assume that the materials schedules (sheets__) accurately represent the types of materials required to be installed.

Inquiry submitted 09/18/2013

Response #1:plan sheets 263 to 311 are paid under items No. 121,122, 123, 124 and 125.
Plan sheets 263-288 (Item No. 125)
Plan sheets 289-291 (Item No. 123)
Plan sheet 292 (Item No. 122)
Plan sheets 293-308 (Item No. 121)
Plan sheets 309-311 (Item No. 124),

Plan sheets 312-314 are not bid items- The quantities on these sheets are for information only and are not separate items.

Response posted 09/18/2013




Inquiry #28: REFER TO PLAN SHEETS 289 TO 292. THE PLANS ARE UNCLEAR HOW THE HOME RUN ARE TO BE CUT TO. PLEASE CLARIFY AS THIS WILL DETERMINE THE CORRECT PRICING FOR THE WORK.
Inquiry submitted 09/18/2013

Response #1:Plan sheets 289-291 the sawcuts (home run) are typical and is noted in the plans under Note 2 ( FOR LOOP CONNECTION DETAILS SEE E-29),
For plan sheet 292 no sawcuts are necessary these are micro wave detection systems.

Response posted 09/18/2013




Inquiry #29: Please refer to Section 86-2.06D of the Special Provisions. In that provision, numbers to manufactures and vendors were provided for this type of material. However, they have informed us just now that they have only manufactured for some boxes types that are called out on the plans and not for all types as shown on the quantities on the plan sheets. The contractor can only bid per what is available in manufacturing. Please clarify and provide a clear instruction how to bid.
Inquiry submitted 09/19/2013

Response #1:Due to the late submittal of the question on bid date. Please Bid according to the Plans and Specifications.
Response posted 09/19/2013






The information provided in the responses to bidder inquiries is not a waiver of Section 2-1.03, “Examination of Plans, Specifications, Contract, and Site of Work,” 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.