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Viewing inquiries for 08-1H2904

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Inquiry #1: Soil nail bar size (#8, #9, #10, etc...) is typically directly specified on the Plans. In this case, the Plans dictate on the "Soil Nail Design Table" on Sheet 55/83 that the bar diameter is to be 1.2". However, is this the core diameter or thread diameter? If this is "thread diameter", a Grade 75 #9 bar would be sufficient. If this is "core diameter", a Grade 75 #10 bar would be required. Please specify/clarify bar size required (#8, #9, #10).
Inquiry submitted 12/03/2019

Response #1:Submitted for consideration
Response posted 12/03/2019


Response #2:Your inquiry is being reviewed. Unless an addendum is issued addressing your concern, please bid per current contract documents.
Response posted 12/05/2019


Response #3: Please refer to Addendum #2.
Response posted 01/09/2020


Response #4:Per Addendum #2, the nail size has been revised and shown on sheets 55 and 61 of 83.


Response posted 01/13/2020




Inquiry #2: Revised Standard Specifications, Division XI Materials, 90 Concrete, on sheet 140 of 147, requires a contractor provided quality control plan, quality control manager, and quality control testing for CIP components of bridge structures, piling, retaining walls, sound walls, box culverts, drainage inlets, approach slabs, bridge railing, and bridge barriers. Is it the intent of Caltrans for the Contractor to provide a quality control manager and perform all the various concrete tests as described in this specification section?
Inquiry submitted 12/30/2019

Response #1:Submitted for consideration
Response posted 01/06/2020


Response #2:Yes, please refer to the 6th and 9th paragraphs in section 1-1.01 of the Standard Specification and section 90 of the current Special Provisions , Revised Standard Specifications, and Standard Specifications.


Response posted 01/06/2020




Inquiry #3: This inquiry is in addition to Inquiry #1. The "Soil Nail Assembly" Details on Sheet 61 of 83 call for a #8 soil nail bar (or 1 inch diameter). The "Soil Nail Design Table" on Sheet 55 of 83 calls for 1.2 inch diameter nail bar. Please provide clarification on the soil nail bar size/diameter.
Inquiry submitted 01/02/2020

Response #1:Submitted for consideration
Response posted 01/06/2020


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 01/07/2020


Response #3:Please refer to Addendum #2.
Response posted 01/09/2020


Response #4:Per Addendum #2, the nail size has been revised and shown on sheets 55 and 61 of 83
Response posted 01/13/2020




Inquiry #4: Reference the "Soil Nail Assembly" detail on sheet 61 of 83. This detail shows and describes the nail with "Pregrouted Corrugated Plastic Sheathing" over its full length up to the back side of the anchorage. Reference Section 46-3.02A of the 2018 RSS issued with the Project Special Provisions which states "Each production soil nail must be either a solid steel bar encapsulated full length in a grouted corrugated plastic sheathing or an epoxy-coated prefabricated solid steel bar partially encapsulated in a grouted corrugated plastic sheathing as shown."

While the 2018 RSS allows for either fully encapsulated bars or epoxy coated bars with partial encapsulation, the plans require fully encapsulated bars.

Please confirm that epoxy coating with partial encapsulation is not allowed and that the soil nail bars must be fully encapsulated as shown on the plans.

Inquiry submitted 01/02/2020

Response #1:Submitted for consideration
Response posted 01/06/2020


Response #2:Please refer to the soil nail assembly detail on sheet 61 of 83 of the contract plans and section 5-1.02, “Contract Components,” of the Standard Specifications
Response posted 01/06/2020




Inquiry #5: Reference the "Bearing Plate Detail" on Sheet 61 of 83 which calls for 3/4" x 5-3/16" studs. Reference "Detail B" which calls for 3/4" x 5-3/16" Stud Head, Typ. AND 1-1/4" x 3/8" Stud Head, Typ.

Please confirm the studs should be 3/4" diameter x 5-3/16" long, with heads that are 1.25" diameter x 3/8" thick.

Inquiry submitted 01/02/2020

Response #1:Submitted for consideration
Response posted 01/06/2020


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 01/08/2020


Response #3:Please refer to Addendum #2.
Response posted 01/10/2020


Response #4:Per Addendum #2, the callout for stud has been revised and shown on sheet 61 of 83.
Response posted 01/13/2020




Inquiry #6: Reference the "Typical Section" on Sheet 77 of 83 which calls for "Filter Fabric (Full Coverage Behind Lagging)". This call-out shows the filter fabric in front of the lagging, behind the concrete facing. The lagging also requires HDPE shims between the boards to facilitate drainage.

Please confirm the drainage fabric is to be placed in front of the lagging, and behind the concrete facing.

Inquiry submitted 01/02/2020

Response #1:Submitted for consideration
Response posted 01/06/2020


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 01/08/2020


Response #3:Please refer to Addendum #2.
Response posted 01/10/2020




Inquiry #7: Reference the "Typical Section" on Sheet 77 of 83 which calls for "Filter Fabric (Full Coverage Behind Lagging)", and View A-A on Sheet 81 of 83 which describes the drainage width as "5'-0" Max & Varies".

While the referenced "View A-A" note calls for 5-ft max drainage width, please confirm the minimum drainage width is the distance between soldier pile flanges at any location to meet the "full coverage" requirement of the "typical section" on Sheet 77.

Inquiry submitted 01/02/2020

Response #1:Submitted for consideration
Response posted 01/06/2020


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 01/08/2020


Response #3:Please refer to Addendum #2.
Response posted 01/10/2020


Response #4:Per Addendum #2, the callout for geocomposite drain strip width has been revised and shown on sheet 81 of 83
Response posted 01/13/2020




Inquiry #8: Reference Sheet 81 of 83. While Option A/View A-A and Option B/View B-B detail two different methods for connecting the drainage to the outlet pipe and weephole system, please confirm that there should be TWO wall drains and weephole in between each pair of soldier beams, one 1-ft above FG and one at the mid-height of the wall.
Inquiry submitted 01/02/2020

Response #1:Submitted for consideration
Response posted 01/06/2020


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 01/08/2020


Response #3:Please refer to Addendum #2.
Response posted 01/10/2020


Response #4:Per Addendum #2, the Wall drain option detail and note have been revised and shown on sheet 81 of 83.
Response posted 01/13/2020




Inquiry #9: Reference the plans for Soil Nail Wall Br. No. 54-E0052. The bid/pay item quantity for Item No 51 is 20,009 LF. The actual quantity shown on the plans and accounting for proof and verification nails is approximately 10% less than this quantity. Please provide an addendum with the correct nail length quantity.
Inquiry submitted 01/02/2020

Response #1:Submitted for consideration
Response posted 01/06/2020


Response #2:Please bid per the current contract bid documents.
Response posted 01/08/2020


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.