Viewing inquiries for 11-290404

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Inquiry #1: The project special provisions, for bid item 23 Aphalt-Rubber Binder, Division V, Section 37 starting at page 24, is specifying an out dated specification. Caltrans has posted on its server an updated specification, dated April 19, 2013, for section 37 with several important changes.
Please consider issuing an addendum that will include the updated version of SSP 37-2 posted April 19, 2013. The updated SSP 37-2 will include all of the correct technical provisions for the construction of the Asphalt Rubber Stress Absorbing Membrane Interlayer (SAMI).

Inquiry submitted 05/28/2013

Response #1:Submitted for consideration.
Response posted 05/28/2013


Response #2:Please bid per the current contract documents.
Response posted 05/29/2013


Response #3:Please refer to Addendum #1.
Response posted 06/17/2013




Inquiry #2: Section 10-1.02 of the Special Provisions states "Do not place the uppermost layer of new pavement until all underlying conduits and loop detectors are installed" Section 12-2.02B(3)(a) states "Schedule cold planing activities to ensure that cold planing, placement of HMA, and reopening the area to traffic is completed during the same shift" These two specifications are in direct conflict with one another. Either the loops are installed after the HMA is installed or the cold planing and placement of the HMA cannot happen in the same shift. Please clarify which Caltrans intends.
Inquiry submitted 05/29/2013

Response #1:Submitted for consideration.
Response posted 05/29/2013


Response #2:Please refer to addendum #1.
Response posted 06/17/2013




Inquiry #3: Traffic Control Chart Number F2, F3 and F4 limit the length of one-way control to 0.33 miles, 0.50 miles and 0.75 miles respectively. This is an extremely short distance for all of the operations that need to occur prior to opening to traffic. The three operations of Cold Planing, installing SAMI and installing Rubber AC with sanding will take up at least 1 mile of neccesary one-way control.

Contract 11-2M4104 which just bid a couple of weeks ago in this same general area, allowed 1.5 miles as the maximum onw-way control. A pilot car is already required by the specifications and there should be no reason to limit the length of the reversing lane closure to such a tight distance. Can the desk RE check with Traffic Operations and modify the traffic charts to allow 1.5 miles of one-way control on this project?

Inquiry submitted 05/29/2013

Response #1:Submitted for consideration.
Response posted 05/29/2013


Response #2:Please bid per the current contract documents.
Response posted 06/04/2013




Inquiry #4: The Typical Cross Sections, Page 2 of 49 of the plans calls out the section as:

"Cold Plane AC Pavement (0.38' Max)
0.20' RHMA (Gap Graded)
Asphalt-Rubber Seal Coat
0.15' HMA (Type A)"

and

"Cold Plane AC Pavement (0.23' Max)
0.20' RHMA (Gap Graded)
Asphalt-Rubber Seal Coat"

The order of the items listed is confusing. Does Caltrans want us to install the pavement section on existing AC and then cold plane it back off? I think I know what the intent is but it is very confusing the way it has been displayed on the typical cross sections Please clarify the designers intent for the design layers.

Maybe this?

"0.20' RHMA (Gap Graded)
Asphalt-Rubber Seal Coat
0.15' HMA (Type A)
Cold Plane AC Pavement (0.38' Max)"

and

"0.20' RHMA (Gap Graded)
Asphalt-Rubber Seal Coat
Cold Plane AC Pavement (0.23' Max)"

Inquiry submitted 05/29/2013

Response #1:Submitted for consideration.
Response posted 05/29/2013


Response #2:The order of the items listed is as shown on the typical cross sections X-1. For the first cross section (bottom on X-1) the order is Cold Plane (existing) AC Pavement (0.23' Max), then place Asphalt-Rubber Seal Coat and cap with 0.20 RHMA (Gap Graded). For the second typical cross section, the order is to Cold Plane (existing) AC Pavement (0.38' Max), place 0.15' HMA (Type A) at the bottom. Then place Asphalt-Rubber Seal Coat and cap with 0.20' RHMA (Gap Graded).

Response posted 06/03/2013




Inquiry #5: Will "Crack Treatment" be required in the areas that receive additional cold planning & 0.15 HMA Placement?
Inquiry submitted 06/05/2013

Response #1:Submitted for consideration.
Response posted 06/05/2013


Response #2:Yes. Please bid per the current contract documents.
Response posted 06/07/2013




Inquiry #6: Section 12-2.02B(3)(a) states "Schedule cold planing activities to ensure that cold planing, placement of HMA, and reopening the area to traffic is completed during the same shift."

For the section that is that is cold planed and then 0.15' of HMA and the SAMI and then 0.20' of RHMA, does the SAMI and RHMA have to be placed in the same shift as the Cold Planing and 0.15' HMA?

Inquiry submitted 06/19/2013

Response #1:Submitted for consideration.
Response posted 06/19/2013


Response #2:The HMA, SAMI, and RHMA will be constructed in the same shift as the cold planing. Please bid per the current contract documents.
Response posted 06/19/2013




Inquiry #7: The specification calls for crack filling prior to placing the SAMI and/or the HMA Leveling Course. The crack fill will not have enough time to cure before applying hot binder and / or Hot Mix on top of it. This may cause the crack fill to swell causing a bump in the roadway.
Inquiry submitted 06/20/2013

Response #1:Submitted for consideration.
Response posted 06/20/2013


Response #2:Please bid per the current contract documents.
Response posted 06/24/2013




Inquiry #8: Item #19 Adjust Metal Beam Guard Railing.

Plans and specs are undefined. What adjustments are required for this bid item?

Inquiry submitted 06/21/2013

Response #1:Submitted for consideration.
Response posted 06/21/2013


Response #2:Please bid per the current contract documents.
Response posted 06/26/2013






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.