Caltrans Office Engineer

Viewing inquiries for 11-403704

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Inquiry #1: It is not possible to determine the nature of the work involved in the earthwork required to install the concrete barrier rail from the information provided in the "conatruction details" and the "summary of quantities". There must have been cross-sections developed for that work in order to determine the quantities listed in teh summary. Please make those cross sections available for download.
Inquiry submitted 12/21/2012

Response #1:The cross sections are available at the following link:

11-403704 cross sections
Response posted 12/21/2012




Inquiry #2: GOOD JOB ON THE CROSS - SECTIONS!
Inquiry submitted 12/21/2012

Response #1:Thank you.
Response posted 12/21/2012




Inquiry #3: This contract includes a requirement for PORTABLE CONCRETE BARRIER (TYPE 60K), bid item 45. This product is rarely used in this area. It would be expected to cost at least twice the unit cost of the common temporary concrete rail, Type K, complete in place. It is difficult to understand why such an expensive option has been specified for what appears to be a fairly mundane application. In view of the high anticipated cost, perhaps you would reconsider the use of the more common temporary concrete rail, Type K. Please clarify.
Inquiry submitted 12/21/2012

Response #1:Submitted for consideration.
Response posted 12/21/2012


Response #2:Please bid per the current contract documents.
Response posted 01/22/2013




Inquiry #4: Our review of the details and layouts of the cast-in-place concrete barrier rail, (Type 60 various), prompts the following comments: The call out for one foot of Class 2 AB under the concrete barrier rail type 60 mod and type 60S mod seems ill-advised on two counts: 1. It would create a working condition wherein workmen would probably be employed to spread and oompact the layers of Class 2 AB in an environment known to be contaminated by aerially deposited lead of such concentrations as to require export to a Class I disposal site. 2. It is of questionable benefit as the employment of the layer of Class 2 base envisioned in the Standard Plans was to enhance the bearing capacity of surficial dirt, deepened footings are not covered in the Standard Plans. The layer of Class 2 AB should be changed to slurry concrete, slightly deepened footing, or elimnated entirely by addendum as recent experience with Caltrans construction staff indicates that their leeway to make this minor adjustment has been taken away. A reference recent contract for concrete barrier rail with deepened footing WITHOUT Class 2 AB would be 11-294504 on route 78. Some thought should also be given to minimizing the changes in design details for very short distances (one is as little as 24') in view of the fact that this type of concrete rail can and should be placed by a slip form operation wherein unneccessary changes in configuration, even small ones, only slow down the production and raise the cost of construction.
Inquiry submitted 01/02/2013

Response #1:Submitted for consideration.

Response posted 01/02/2013


Response #2:Please bid per the current contract documents.

Response posted 01/22/2013




Inquiry #5: The Aeially Deposited Lead Information Handout is posted at the link below.
Inquiry submitted 01/22/2013

Response #1:ADL Information Handout

Response posted 01/22/2013






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.