The responses to bidder's inquiries, unless incorporated into a formal addendem to the contract, are not a part of the contract and are provided for the bidder's convenience only. In some instances, the question and answer may represent a summary of the matters discussed rather than a word-for-word recitation. The availability or use of information provided in the responses to bidder's inquiries is not to be construed in any way as a waiver of the provisions of Section 2-1.03 of the Standard Specifications or any other provision of the contract, the plans, Standard Specifications or Special Provisions, nor to excuse the contractor from full compliance with those contract requirements. Bidders are cautioned that subsequent responses or contract addenda may affect or vary a response previously given.
Q1) On page 1 of the "Notice to Bidders" and also on page 6 of the Bid proposal it descripes this project as "Bids must be on a cost+time basis", however, Bid item number 2, is for Time Related Overhead (TRO)with a quantity of 500 Days. Also, Wouldn't the liquid damages be the same amount of the Multiplier of $18,836.00. On page 9 of the special, it shows $9,336.00, but on the amendments to the Standard Specifications (page 74 of 281) it shows $10,500 per day. Please clarify.
A1) Refer to Section 4, "BEGINNING OF WORK, TIME OF COMPLETION, AND LIQUIDATED DAMAGES" of the Special Provisions: "Additional damages to those specified in Section 8-1.07, "Liquidated damages," of the Standard Specifications ($10,500 per day) are $9,336 per day starting on the 1st day after exceeding the number of working days bid until work requiring lane or shoulder closures on State Highway Route 99 is complete." Therefore, the 'multiplier' shown on page 6 of the Bid Book is $10,500 + $9,336, for a total of $19,836. Refer to the "Notice to Bidders" which states, "Do not bid more than 500 working days." Refer also to Section 2-1.12B "Bid Item List and Bid Comparison" in the amended Standard Specifications" which states, "If your bid for time exceeds the number of working days described in the Notice to Bidders, your bid is nonresponsive." 30Sep11.
Q2) On the summary sheet, it quantifies to use both types of material (HMA & RHMA (Gap Graded)) for the HMA Dikes. Is this Correct? If yes, please provide summary of type of material at locations.
A2) Yes, the quantities on the Summary of Quantities plan are correct. The RHMA quantity listed for HMA Dike is for the top layer extension of the shoulder RHMA paving under the dike. 5Oct11.
Q3) Seal Pavement Joint Item 43 is too low. JPCP RSC section is 96445LF at 25ft wide. SOQ-Q3. 96445LF of JPCP with new joint pattern (12,15,13,14) equals an average trans joint every 13.5LF. 96445/13.5=7152.3 joints. Round up to 7153 trans joints x 25ft wide (2lanes@12ft plus 1ft into outside shoulder) 7153x25=178825LF. Please correct item qty. Also no joint seals are shown in SOQ for pavement transition tapers.
A3) Refer to the Bid Item List revised by Addendum No. 1, dated October 26, 2011. 1Nov11.
Q4) Remove Concrete Pavement item 20 is too much qty. Remove Concrete Pavement is for demo of existing PCCP to be replaced with JPCP RSC and LCB RS. 96445LF @ 25ft wide for JPCP RSC work, remove concrete pavement would only be for the 24ft wide lanes (2&3) and removal of the CTB and dirt would be roadway exc along with the 1ft section into the outside shoulder. If my assertions are correct then remove concrete pavement item would be 96445 x 24 x .7 or .8 depending on existing thickness / 27 = CY, or 60010cy for .7ft and 68590cy for .8ft.
A4) Refer to the Bid Item List revised by Addendum No. 1, dated October 26, 2011. 1Nov11.
Q5) Please confirm Caltrans' intent on the following items: JPCP RSC rehab - remove concrete pavement item pays demo of top lift PCCP, roadway exc pays for removal of CTB and dirt to reach the 1.4ft deep placement section and for removal of the 1ftx1.4ft outside shoulder removal adjacent to the replacement area. And the remove concrete pavement limits shown on the top half of X-2 should really be on the bottom half as all that happens between PM7.3 and 10.0 is individual slab replacement RSC which includes it's own demo. Also On C-2 the 1.05ft of replace concrete pavement rsc should be JPCP RSC. Specials page 77 state removal of edge drain and other overlying material is included, but since the item is remove concrete pavement we do not see how it applies to removing the ac shoulder section and edge drain. We think it is more appropriate to have edge drain removal included in the roadway exc item as that is what we believe is the proper item for the work. Please provide a construction detail for JPCP RSC / LCB RS work that shows how demo is paid for?
A5) Removal of the top 1.05 ft of existing structural section is paid as "Remove Concrete Pavement." Removal of the remaining 0.35 ft and the 1 ft by 1.4 ft section of outside shoulder is to be paid as "Roadway Excavation." The limits for removal of concrete pavement for Individual Slab Replacement, as shown on Sheet X-2, is included in payment for the item for "Individual Slab Replacement (RSC)." Refer to Addendum No. 1, dated October 26, 2011. 1Nov11.
Q6) Dowel bar drill and bond by the LF should be dowel bars drill and bond by the each. Or explain how the state intends to pay by the LF for dowels, LF of bar or LF of bonded bar into concrete (18inches or 9inches per bar).
Refer to Section 10-1.41, "DRILL AND BOND DOWELS," of the Special Provisions, which states "drilling and bonding dowels will be measured and paid for by the linear foot determined by the number and the required depth of holes as shown on the plans..." The estimated quantity for Item No. 45, "DOWEL BAR (DRILL AND BOND)," is based on 18 inches per dowel bar. Refer to Item No. 45, "Dowel Bar (Drill and Bond)" in the Bid Item List revised by Addendum No. 4, dated November 22, 2011. 28Nov11
Q7) C-1 Construction details Please relabel all replace concrete pavement rsc to ISR RSC. Please confirm notes 1-9 apply to ISR RSC and Not JPCP RSC. As it can be confusing with the overlapping PM's with the JPCP RSC work.
A7) Refer to Addendum No. 1, dated October 26, 2011. 1Nov11.
Q8) For ISR RSC please specify what type (I, II, or III) from P-8 to be used. The state included a drill and bond item for dowels into existing but whether the state wants dowels at all joints is unclear.
A8) Refer to "Type I" detail for "traffic lane lines match longitudinal joints" on Revised Standard Plan P8. No tie bars are used for Individual Slab Replacement (RSC). Refer also to Note 5 for new transverse contraction joints: "Transverse joint to match skew of existing joint. Omit dowel bars (tie bars)." 25Oct11.
Q9) Lean Concrete Base RS - can LCB RS be proportioned by volume? Jointed Plain Concrete Pavement RSC - can JPCP RSC be proportioned by volume? Is it's the state's intent to disallow volumetric mixers from being able to produce these two RS/RSC concrete mixes but allow it for ISR RSC?
A9) Volumetric proportioning is not allowed for Lean Concrete Base (Rapid Setting) or Jointed Plain Concrete Pavement (RSC). It can be used for Individual Slab Replacement (RSC). 25Oct11.
Q10)For JPCP RSC - please clarify the state would like an isolation joint (bituminous) between lane 1 & 2 and flexible foam between lane 2/3 with tie bars punched thru the foam and nothing between 3 and ac shoulder.
A10) As shown on Revised Standard Plan (RSP) P1 and RSP P18, an isolation joint is required between lanes 1 and 2, and a longitudinal joint is required between lanes 2 and 3. Refer to Section A-A and Section B-B on RSP P1 for longitudinal joint details. Although no flexible foam is required between lanes 2 and 3, tie bars are required. 25Oct11.
Q11) Please fix seal existing concrete pavement item 46 quantity - C-1 note 6 specifies a generic average panel size but it does not appear this was used for the joint seal existing pavement calc. Please address.
A11) Refer to the Bid Item List revised by Addendum No. 1, dated October 26, 2011. 1Nov11.
Q12) Will the state require flyash in JPCP RSC?
A12) Flyash is not required in Jointed Plain Concrete Pavement (RSC). 25Oct11.
Q13) Will the contractor be allowed to work both directions (NB / SB) at the same station at the same time?
No. Refer to Section 10-1.10 MAINTAINING TRAFFIC of the Special Provisions, which states "Concurrent stationary closures shall be spaced no closer than 5 miles apart." The Contractor will be allowed to work at the same location in both directions at the same time, within lane closures, as long as all other safety conditions are met. Refer to Section 10-1.13 "TRAFFIC CONTROL SYSTEM FOR LANE CLOSURE" of the Special Provisions, which states, "The provisions in this section will not relieve the Contractor of responsibility for providing additional devices or taking measures as may be necessary to comply with the provisions in Section 7-1.09, "Public Safety," of the Standard Specifications." 2Nov11.
Q14) Will the state require a buffer lane between live traffic and open excavations for removal and replacement of concrete pavement sections?
A14) Yes, refer to Section 10-1.10 "MAINTAINING TRAFFIC" of the Special Provisions, which states "In addition to the provisions set forth in Section 7-1.09, "Public Safety," of the Standard Specifications, whenever work, including the work of installing, maintaining, and removing temporary railing (Type K) is to be performed on the freeway within 6 feet of the adjacent traffic lane, the adjacent traffic lane shall be closed." 25Oct11.
Q15) Does concrete pavement removal as related to JPCP RSC require sawcutting the perimeter full depth or only score perimeter 2 inches?
A15) Refer to Special Provisions Section 10-1.20, “REMOVE PORTLAND CEMENT CONCRETE PAVEMENT” (page 77), second paragraph. 25Oct11.
Q16)Does concrete pavement removal as related to JPCP RSC require removal by non-impact methods or may impact methods be used?
A16) Refer to Section 15-3.02 "REMOVAL METHODS" of the Standard Specifications. Impact methods may be used such that "concrete removal operations shall be performed without damage to any portion that is to remain in place." 25Oct11.
Q17) Can the state please provide a cross section view that shows how demo is paid as related to Remove concrete pavement, remove edge drain as included in remove concrete pavement payment, and roadway excavation.
A17) Refer to Addendum No. 1, dated October 26, 2011. 1Nov11.
Q18) Please clarify that on specials page 115 Removal and Replacement of slabs without bar reinforcement is for replacement of slabs damaged by contractor of for slabs the engineer rejects that have to be "re-done". Also that the specified removal requirements and dowel placement only apply in the case described above and that for removal of the pavement as paid in remove concrete pavement shall be as specified on page 77 of specials.
A18) Special Provisions Section 10-1.35 "JOINTED PLAIN CONCRETE PAVEMENT (RAPID STRENGTH CONCRETE)," subsection "Removal and Replacement of Slabs Without Bar Reinforcement"(page 115), is for replacement of slabs damaged by the contractor or for slabs rejected by the Engineer. The specified slab removal method and dowel placement in this same heading only applies to this section. Item No. 20, "REMOVE CONCRETE PAVEMENT," is for work specified in Section 10-1.20 "EXISTING HIGHWAY FACILITIES," subsection "REMOVE PORTLAND CEMENT CONCRETE PAVEMENT," of the Special Provisions (page 77). 25Oct11.
Q19) Will the state require flyash in LCB RS?
A19) Flyash is not required in rapid-setting lean concrete base. 25Oct11.
Q20) What is the state's compressive strength requirement to open to traffic?All I can locate is 2500psi compressive @ 3days.
A20) Refer to Section 10-1.34, Engineer's acceptance for Modulus of Rupture of the Special Provisions (page 98), which states that RSC pavement must develop a minimum modulus of rupture of 400 PSI before opening to traffic. Also note that the "Percentage Pay Table" (page 99) in Section 10-1.34 requires a Modulus of Rupture (PSI) greater than or equal to 400 psi at opening to traffic and greater than or equal to 600 psi at 7 days, for 100% payment. Also, if hydraulic cement is used it must meet the requirements shown in the table for Hydraulic Cement (page 100), which includes a compressive strength @ 3 days of 2500 psi. 25Oct11.
Q21) Will nightly/daily testing of LCB RS mix be required? Or will a pre-qualification at a trial batch be allowed to establish a job cure time as related to that specific mix?
A21) Refer to Special Provisions Section 10-1.24, “QUALITY CONTROL” (page 81): “Perform at least one test at opening age for each 130 cubic yards placed." 25Oct11.
Q22) 10-1.36 Concrete Pavement Smoothness - payment section specifies that payment is included in the contract price paid per cubic yard of concrete pavement. Please clarify as this project does not have a concrete pavement item. JPCP RSC = yes, CP = no.
A22) JPCP (RSC) and ISR (RSC) are types of concrete pavement. The smoothness requirements of Special Provisions Section 10-1.36 "CONCRETE PAVEMENT SMOOTHNESS" apply to concrete pavement except as otherwise stated for the specific type of concrete pavement. Therefore, the work of meeting smoothness requirements is included in the contract prices paid for the type of concrete pavement specified in the special provisions. 25Oct11.
Q23) Please confirm for 10-1.10 Maintaining Traffic the 1 mile maximum length of a stationary lane closure will be measured as the work area and not include and tapers or warning signs that may be in advance of the actual work.
A23) Tapers are included in the 1 mile maximum length of stationary lane closure. The warning signs are not included. 25Oct11.
Q24) Could the state please reconsider increasing the lane closure length limit, there are many operations that will have to be going on simultaneously specifically related to the JPCP RSC / LCB RS replacement operation.
No, the maximum length of a single stationary lane closure specified in Special Provisions Section 10-1.10 "MAINTAINING TRAFFIC" will not be revised. Refer to Special Provisions, Section 10-1.10 "MAINTAINING TRAFFIC," as revised by Addendum No. 4, dated November 22, 2011. The maximum length of a single stationary lane closure has been extended to 1.5 mile. 28Nov11.
Q25) Since this project is A+B proposal with a $19,836 per day bid, Will CALTRANS suspend the working days charged on the contract for that period of time between February 1 & September 15 if the work involves activities on the critcal path at postmiles R5.3 and R6.1.
A25) Reference Special Provisions Section 10-1.01 "ORDER OF WORK." The Contractor is required to prepare a CPM progress schedule to complete the work within the time specified that does not allow work "between February 1 and September 15 between postmiles R5.3 and R6.1." Bidders should consider this requirement in their bid. 25Oct11.
Q26) Please clarify the State's intent for edge drain removal/replacement PM R7.3/R10.0 as shown on Typical Cross Sections X-2. Is edge drain removal and replacement only at locations where Individual Slab Replacement occurs at Lane 3? Is payment for removal of drain and overlying surface to be included in Bid Item 42? Is payment of structural backfill to be included in Bid Item 42? Is payment of HMA overlay to be included in Bid Item 42? Replacement 3" pipe is on Bid Item 51.
A26) Remove and replace existing edge drain in outside shoulders adjacent to slab replacement, as shown on Typical Cross Sections X-2 (sheet 4 of the plans), from PM R7.3 to PM R10.0. Refer to Section 68-3.05 "PAYMENT" of the amended Standard Specifications, which states that the contract price paid per linear foot for plastic pipe (edge drain) includes full compensation for doing all the work involved in installing edge drains, including excavation and backfill. 25Oct11.
Q27) Reference Summary of Quantities Q-2, Bridge Approach Transition Tapers, quantities for replacement HMA and Class 2 AB are missing where PCC pavement is to be removed per Construction Details C-3, sheet 7.
A27) Refer to Addendum No. 1, dated October 26, 2011. 1Nov11.
Q28) Per section 10-1.10, Maintaining Traffic, whenever work is performed within 6 feet of the adjacent traffic lane, the adjacent traffic lane will be closed (except for grinding & grooving and installing, maintaining, removing traffic control devices). Per this requirement when the contractor is working in the #2 lane (paving, replacing pavement, etc.) the #1 and #3 lanes would need to be closed. However, the specs do not allow for all 3 lanes to be closed. Please clarify.
A28) Whenever work is being performed in the No.2 (middle) lane, the No.1 (inside) lane should be closed, allowing traffic to use the No. 3 (outside) lane and a portion of the outside shoulder. Section 7-1.09 "PUBLIC SAFETY" of the amended Standard Specifications states, "When traffic cones or delineators are used for temporary edge delineation, the line of cones or delineators is considered the edge of the traveled way.” Therefore, the lane line can be shifted temporarily with a line of cones or delineators to move traffic away from the work and provide the 6 foot buffer. Note that Section 7-1.09 also states, “Do not reduce an open traffic lane width to less than 10 feet." 25Oct11.
Q29) Reference Gore Reconstruction on Summary of Quantities Q-3 and Remove Curbed Nose detail C-5 sheet 9, is it the States's intent to remove and reconstruct only per the quantities on the table? If so, this approach will leave some "freestanding" curb and gutter. Or will all the existing nose curb be removed, and then reconstruct area of curb removal and area between curb? If the latter, we have more quantity.
A29) It is the State’s intent to remove the curbed inlet nose along the on-ramps and Route 99, and reconstruct as shown in the “Remove Curbed Nose Detail” on Construction Details C-5. 25Oct11.
Q30) Reference On/Off-Ramp details on Construction Details C-4 & C-5, please clarify where the State's limit of work should be at on/off-ramps. Are ramp conform tapers at the limit of the gore or at the street? If work continues on ramps past the gore (to the street), please clarify work to the left of the left edge of travel way.
A30) Refer to Addendum No. 1, dated October 26, 2011. 1Nov11.
Q31) Related to Question 30 above. Reference On/Off-Ramp details on Construction Details C-4 & C-5, some off-ramps & on-ramps have valley gutter at right edge of travel way. Will the shoulder outside of the valley gutter be overlayed/ground out and overlayed as part of this contract? This scenario is not shown on details. It seems this operation would need separate direction.
A31) The valley gutters are within the limits of PCC lane replacement. The shoulder outside the valley gutter is to be reconstructed as shown in the “On/Off-Ramp Details” on Construction Details C-5 (sheet 9 of the plans). 25Oct11.
Q32) Special Provisions Section 10-1.35, subsection "Production Process Control and Quality Control Testing" requires a testing frequency for RSC that is typical of panel replacement construction. This project requires placement of 89,900 cy of RSC. At the specified testing frequency, the contractor will be required to fabricate and test approximately 4700 beams at an exorbitant cost to the State on this contract. Will the contractor be held to this frequency or will the State revise the testing requirement to something similar to standard PCC pavement requirements?
A32) The testing requirements in the Special Provisions, Section 10-1.35, subsection “Production Process Control and Quality Control Testing” will not be revised. 25Oct11.
Q33) Details on the Type A1 and A2 liquid seal are found on sheet 54 of 64 of the contract plans, however the saw cut depth of the 1/8” width sawcut is not indicated. Please provide the depth of the wide 1/8” sawcut.
A33) Refer to Special Provisions Section 10-1.34, subsection “Joints” (page 105) which states, “Cut contraction joints a minimum 1/3 the depth of the slab.” Refer also to amended Standard Specifications Section 40-3.08 “JOINTS.” 25Oct11.
Q34) The lower detail found on Typical Cross sections X-2 on sheet 4 of 64, shows the removal and replacement of the PCC with JPCP in the number 2 and 3 lanes. During this process will the state require the placement of temporary tie bars between the new and existing PCC slabs, number 2 and 3 lanes? Can the tie bars between the number 2 and 3 lanes be installed after the PCC is replaced in the number 2 lane and before the JPCP (RSC) concrete in the number 3 lane?
A34) Refer to Revised Standard Plan P10 (sheet 50 of the plans) for Dowel Bar Details. 25Oct11.
Q35)In accordance to Caltrans Specifications Section 7, “While subgrade and paving operations are underway, public traffic shall be permitted to use the shoulders.” “Any shaping of shoulders or reshaping of subgrade necessary for the accommodation of public traffic thereon during subgrade preparation and paving operations will be paid for as extra work as provided in Section 4-1.03D.” In order to work in the number 2 lane, the contractor will need to close the number 2 lane, number 3 lane and part of the number 1 lane. The traffic will be then shifted into the shoulder lane. Please confirm that the contractor has interpreted the specifications correctly and that the state will pay for all of the reshaping of the shoulder and preparation of the subgrade as additional work to the contract.
A35) Please see Question and Answer #28. Refer to Section 7-1.08 "PUBLIC CONVENIENCE" of the amended Standard Specifications. The existing paved shoulders may be used temporarily to provide safe passage of public traffic. Therefore, any shaping of shoulders or reshaping of subgrade due to this use should not be necessary. New or unforseen work must be authorized by Engineer. 25Oct11.
Q36)On Sheey 23 (Q-2 Summary of Quantities), at Lander Ave, Walnut, West Turlock OH, Main, Fulkerth, Monte Vista North, North Turlock OH, Taylor Road (both North and South Bond), the pay quantitites for the AB do not exists and the AC quantity is vastly off in comparision to the details on page 6 and 7. Please clarify.
A36) Refer to Addendum No. 1, dated October 26, 2011. 1Nov11.
Q37) Reference Construction Details C-2 and C-3, and Summary of Quantities Q-2 for transition tapers. The State's RHMA Gap graded quantity is basically only for lanes 1, 2, and 3. We believe RHMA gap graded quantity for transition taper at the shoulders should be included in the quantity.
A37) The quantity for RHMA (Gap Graded) for the shoulders in pavement transition tapers is included in the quantities provided for RHMA (Gap Graded), shown in the Pavement Transition Tapers table on Summary of Quantities Q-2 (sheet 23 of the plans). 25Oct11.
Q38)Reference Construction Detail C-2 for Overcrossing Overlay Pavement Transition Taper: please clarify the State's intent for grind and overlay at the shoulders parallel to RSC.
A38) Refer to the notes on Construction Details C-1 (sheet 5 of the plans). The detail for "Overcrossing Overlay Pavement Transition Taper" on Construction Details C-2 includes the limits and depths for cold planing AC pavement and placement of HMA (Type A) for the shoulders. 25Oct11.
Q39)Section 40-3.12 Final Finishing states, “construct longitudinal grooves with a self-propelled machine design specifically for grooving and texturing concrete pavement. “ Due to the lane closures the, 1) the concrete pavement can only be replaced in one lane at a time, 2) it doesn’t allow the contractor to us a self-propelled machine for grooving and texturing the concrete. Will the state allow hand constructed grooves in lieu of grooves made with a self-propelled machine?
A39) No. Refer to Section 10-1.10 "MAINTAINING TRAFFIC" of the Special Provisions, which states "(Except as listed above,) closure of adjacent traffic lane will not be required for grinding and grooving operations, and for installing, maintaining and removing traffic control devices." However, the Contractor is responsible to provide for public safety. Your attention is directed to the requirements of Section 7-1.09 "PUBLIC SAFETY" in the Amendments to the Standard Specifications. 25Oct11.
Q40)Please confirm that all Rapid Strength Concrete, and LCB (Rapid Strength Concrete) must meet .050% shrinkage.
Refer to Special Provisions Sections 10-1.24, 10-1.34, and 10-1.35. The "contraction in air" requirement is 0.053%, max. Refer to the table in Section 90-1.01 "DESCRIPTION" (PORTLAND CEMENT CONCRETE) of the Amendments to the Standard Specifications page 253 of 281) for shrinkage requirements. 28Nov11.
Q41)Please confirm that there is a maximum cement content of 800 lbs for all Rapid Strength Concrete
Refer to the Amendments to the Standard Specifications Section 90-1.01, (PORTLAND CEMENT CONCRETE) "Description" (page 252 of 281). There is no maximum cement content for Portland cement concrete pavement. Refer to Section 40-2.01C "Cementitious Material" in the Amendments to the Standard Specifications (pg. 156 of 281), "Concrete for concrete pavement must contain from 505 pounds to 675 pounds cementitious material per cubic yard." Refer to Addendum No. 4, dated November 22, 2011.
Q42)Please clarify the response to question No. 13. "Concurrent stationary closures shall be spaced no closer than 5 miles apart" for each direction or 5 miles apart within the project limits, regardless of direction of travel?
A42) The bidder is correct. The intent of this statement is to prevent consecutive lane closures closer than 5 miles in the same direction of travel. Refer to the revised answer to Question 13. 2Nov11.
Q43)Reference answer to Question #30 above, please clarify "The valley gutters are within limits of PCC lane replacement". On/Off-Ramps do not have PCC lane replacement. Paved shoulder work outside the valley gutter or rolled curb & gutter in question is only on ramps that are paved with asphalt, not PCC.
A43) The valley gutters are located within the limits of Route 99 mainline where PCC pavement is being replaced. Within these limits, the work on the shoulder includes cold planing and HMA overlay to conform to the existing pavement surface elevations. The pavement work adjacent to the valley gutters will also include cold planing and HMA overlay to conform to existing pavement surface elevations. 2Nov11.
Q44) For Lean Base Rapid Setting, what is the strength requirement for opening to traffic? Is there a strength requirement before JPCP can be placed on top of it.
A44) Refer to Special Provisions, Section 10-1.24, "Lean Concrete Base Rapid Setting," as revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q45)Please review standard plan T10, please extend maximum length of lane closure, or define the length to be the length of work area and not include any tapers. Please see q&a #23. If you start counting from the beginning of tapers of the 5280LF allowed 5400LF of cones on the ground before the work area for two lanes closed (2 each 1700LF tangent sections, plus 2ea 1000' tapers) effectively not allowing work in lane 2.
Refer to Section 10-1.13 "TRAFFIC CONTROL SYSTEM FOR LANE CLOSURE," subsection "STATIONARY LANE CLOSURE," of the Special Provisions: "The 1,700-foot section of a lane closure, shown along lane lines between the 1,000-foot lane closure tapers on the plans (T10 and T10A) shall not be used." The Contractor is responsible for planning their work to meet the requirements of Section 10-1.10 "MAINTAINING TRAFFIC" and Section 10-1.13 "TRAFFIC CONTROL SYSTEM FOR LANE CLOSURE" of the Special Provisions. Refer to Special Provisions Section 10-1.13 "TRAFFIC CONTROL SYSTEM FOR LANE CLOSURE," subsection "STATIONARY LANE CLOSURE," as revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q46)Please review Q&A #6, 10-1.41 states "LF determined by the number and required depth of holes" that means 9 inches per bar. SOQ you say is based on 18inches per bar. Please fix, SOQ actually uses 24LF per slab. 24LF per slab is 12LF per joint or 18inches per bar if you only want 8 dowel bars per transverse joint.
The estimated quantity for drill and bond dowel is based on 18 inches per bar, resulting in 12 LF per joint. The estimated quantity for Item No. 45, "Dowel Bar (Drill and Bond)" in the Bid Item List was revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q47)Please review q&a 14 & 35 & 28 & 39. Will the state please issue via an addendum a revised order of work section specifying that the contractor shall close all 3 lanes of traffic and push traffic to the shoulder for lane two lane replacement work.
A47) Section 10-1.01 "ORDER OF WORK" of the Special Provisions will not be revised. 2Nov11.
Q48)Please confirm the state would like lane 1 ground before the concrete pavement replacement work starts per 40-3.04B.
A48) Yes, refer to Section 40-3.04B "Concrete Pavement Widening," in the amended Standard Specifications: "If concrete pavement is placed adjacent to existing pavement not constructed as part of the contract, grind the existing concrete pavement lane or shoulder adjacent to the new concrete pavement. Perform the grinding before new concrete pavement is placed. The new concrete pavement must match the elevation of the existing concrete pavement after grinding." 2Nov11.
Q49)Please review q&a 14 & 35 & 28 & 39. Please review section 7-1.09 Public Safety (specials back half, pg 50 & 51 of 281) with section 10-1.10 Maintaining Traffic. There are a few direct contradictions. What takes precedent.
A49) Refer to Section 5-1.04 "CONTRACT COMPONENTS" in the Amendments to the Standard Specifications (pg. 24 of 281) for ranking of contract documents. 2Nov11.
Q50)Per addendum 1, plan sheet 22 of 64 "Summary of Quantities Q-1", Quantities for HMA and RHMA (Gap Graded) at Gore Lane Tapers have been increased. Please provide revised sheet 25 "Summary of Quantities Q-4".
A50) Refer to Addendum No. 2, dated November 3, 2011. 8Nov11.
Q51)Is item #2 (time related overhead) going to be per working day as per non- A+B contracts (and this bid quantity sheet)which the change would mean there would not be an amount of time bid on the proposal sheet, or is the State going to change the unit in the bid sheet to reflect a "lump sum" per the specifications? or is the designation for item #2 going to be changed to(F)final pay? We cannot bid, lets just say, 400 days in the B portion of the proposal, when the bid item is for 500. Please change this to a lump sum item or remove the "B" portion of the proposal.
A51) Refer to Addendum No. 2, dated November 3, 2011. 8Nov11.
Q52)Per the answer to Q13, usually the distance between lane closures applies to one direction only. What difference would it make if we had lane closures in both direction at the same time?
A52) Refer to the revised answer to Question 13. 2Nov11.
Q53)Previous question ( Q 40 ). The answer regarding shrinkage for "contraction in air" requirement is .053 max refers to Cement only, not RSC. Does the RSC need to meet the .050% shrinkage requirement for concrete paving?
A53) Refer to the Section 90-1.01 "DESCRIPTION" (PORTLAND CEMENT CONCRETE) of the Amendments to the Standard Specifications for shrinkage requirements. The table on page 253 of 281 provides concrete shrinkage requirements for "Paving and Approach Slab Concrete." Maximum Shrinkage of laboratory cast specimens at 28 days drying is 0.050%. 3Nov11.
Q54)Are the "Amendments to the Standard Specifications" in the second half of the specials book considered part of the special provisions or not. Specifically when attempting to determine document ranking per 5-1.04 Contract Components??
A54) The "Amendments to the 2006 Standard Specifications Dated May 2006," which are included with the special provisions, either revise or replace some parts of the 2006 Standard Specifications. Interpret a reference to a section of the Standard Specifications as a reference to the Standard Specifications as revised by any amendment, special provision, or both. Note that Section 5-1.04 "CONTRACT COMPONENTS" of the Amendments (pg. 24 of 281)'replaces' that section number in the 2006 Standard Specifications. 3Nov11.
Q55)Please check new quantity of HMA required 203,000 ton (addendum #1). The total on the Summary of Quantities (page Q-1)is different than the actual summary of description of work items (202,639 tons vs. 190,951 tons). Please clarify.
A55) Refer to Addendum No. 2, dated November 3, 2011. 8Nov11.
Q56)In order to prepare Item #47 - Crack Existing Pavement correctly, the description of the work (p.118-120)involves placing HMA in existing cracks greater than 3/4". However, through the entire proposed cracking area, there is a large number of existing cracks and spalls larger than 3/4" (unquantifiable), can Caltrans either provide actual footage of cracks or paid on force account all material used for this operation (joint filling of existing cracks and spalls).
A56) Refer to Section 10-1.38 "CRACK EXISTING CONCRETE PAVEMENT" of the Special Provisions (pg. 120): "Crack existing concrete pavement will be measured by the square yard determined from the full width and length of the pavement cracked." A quantity for linear feet of cracks will not be provided. The contract price paid per SQYD includes filling joints, cracks and spalls. 3Nov11.
Q57)Please confirm that railroad protective insurance is not required for this project.
A57) Refer to Section 13-1.01 GENERAL (RELATIONS WITH RAILROAD) of the Special Provisions, "In accordance with the provisions in Section 7-1.12, “Indemnification and Insurance,” of the Standard Specifications, the Contractor shall be responsible for all damages to railroad tracks and appurtenances thereto and to railroad equipment operating on such track, resulting from his operations." 3Nov11.
Q58)The amendments to the Standard Specifications (issue date of 8-5-11) state that "Geosynthetic Pavement interlayer must comply with specificaitons for pavement fabric or paving mat in Section 88-1.07, "Pavement Interlayer." These two materials are completely different in engineering principal and usage. They perform significantly differently in the field and are considerably different in cost and application in the field. The two materials are not interchangeable. Please specify either fabric or mat, but not both.
A58) Refer to Section 8-1.03 "FILTER FABRIC" of the Special Provisions, which specifies that "Filter fabric for geosynthetic pavement interlayer must be Class A as specified in Section 88-1.02, "Filtration," of the Standard Specifications." 4Nov11.
Q59)There is no seperate bid item for Temporary Striping. Will temporary striping be required? If so, how will it be paid?
A59) Reference Special Provisions Section 10-1.14 "TEMPORARY PAVEMENT DELINEATION." Payment for temporary pavement delineation is included in the contract prices paid for the items of work that obliterated the laneline, centerline and edgeline pavement delineation and no separate payment will be made. 3Nov11.
Q60)Please confirm that the state wants a 1" deep rumble strip per page C-6 of the plans. Previous contracts only require 5/8" to 3/4" rumble strip.
A60) Yes, construct rumble strips as shown in "Rumble Strip Placement On 2' Shoulder, Left of Direction of Travel detail" on Construction Details C-6 (sheet 10 of the plans). 3Nov11.
Q61)With the large number of unanswered questions, most of which have a significant impact on estimating costs, is Caltrans going to delay the bid opening date?
There are no plans to postpone the bid opening date. Bids will open on December 6, 2011, per Addendum No. 2, dated November 3, 2011. 30Nov11
Q62)How does the State anticipate work in the center lanes will take place while still maintaining a 6' buffer between the traffic as required in Section 10-1.10 of the Special Provisions? This requirement is problematic for all paving, crack seating, JPCP and paving operations especially at the bridge locations. We request an addendum be issued to clarify.
A62) It will be necessary to close two lanes for this situation. Refer to the lane requirement charts in Section 10-1.10 "MAINTAINING TRAFFIC." Refer also to Standard Plan T10A, "Traffic Control System for Lane and Complete Closures On Freeways and Expressways," for details. 3Nov11.
Q63)What is the reason for not allowing work between R5.3 and R6.1 between Feb. 1 and September 15? Is this restriction specific to 2012 and 2013?
A63) The restriction is due to the burrowing owl nesting period and is an annual condition. Refer to Section 5-1.11 "BIRD PROTECTION" of the Special Provisions. 3Nov11.
Q64) Per Sheet No. Q-1 (Summary of Quantities), per chart at STA R18.01 thru R24.7, it shows cold planing is required (4,450sy "NB" & 4,450sy "SB"), however on the Sheet No. X-1 (Typical Cross Sections), it shows no cold planing. Please clarify.
A64) The quantity shown for Cold Plane AC Pavement in the Roadway Items table, Summary of Quantities Q-1, is for cold planing the shoulders between PM M18.01 and M18.4 and between PM R24.621 and R24.712. Refer to Typical Cross Sections Q-2. 3Nov11.
Q65) The new edgedrain shown on sheet X-2 gets backfilled with 1.05' Structural Bkf (Slurry Cement), this work is not behind krail. As such, the #3 lane should remain closed until the slurry cement has completely cured but the specs do not allow for this. What is caltrans expecting the contractor to do to allow the #3 lane to be opened prior to the slurry cement curing? Will the contractor have to protect the trench? If so, what is the protection required and how is it paid?
A65) The work will need to be staged to allow for installation of edge drains and the slurry cement backfill cure time. Refer to "Temporary Roadway Pavement Structure" in Special Provisions Section 10-1.34, under subsection "CONSTRUCTION." The individual slab replacement operation and edge drain replacement may require different work periods. 7Nov11.
Q66) Will temporary inlet protection be required on this project? If so, how many and how will the work be paid?
A66) The Contractor will be responsible for determining the need and quantity of WPC practices. Refer to "Payment" for "WATER POLLUTION CONTROL" and "CONSTRUCTION SITE MANAGEMENT" in Sections 10-1.34 and 10-1.35 of the Special Provisions. Compensation for this work is included in the lump sum prices paid for these items. 7Nov11.
Q67)Addendum No.2 issued November 3rd 2011 revised the language of Special Provision Section 10-1-24 Lean Concrete Base Rapid Setting under paragraph “CONSTRUCTION” Sub Paragraph General to Read “LCBRS must have compressive strength of 725 psi at opening age. Subsequent paving operations may commence after opening age of LCBRS.” As stated the project is not constructible within the hours allotted in the Lane Closure Charts Provided.
A67) Refer to revisions to the Special Provisions, per Addendum No. 4, dated November 22, 2011. 30Nov11.
Q68)Why has Cal Trans established an opening age for LCBRS of 725psi prior to placing JPCP Rapid Set? ISR Rapid Set Concrete only requires 400psi at traffic opening per section 10-1.34. The cure time to achieve this opening age is extremely long relative to the lane closure time allowed and effectively will increase the number of shifts of work dramatically and hence the cost to the State. Could you reconsider this specification strength and eliminate this. The LCBRS concrete will cure under the JPCP rapid set concrete.
A68) Refer to revisions to the Special Provisions, per Addendum No. 4, dated November 22, 2011. 30Nov11.
Q69)Referring to Q41 and A41 that the max. cement for RSC is 675 pounds. But on page 252 of 281 it refers to strength requirements to allow a max. cement of 800 pounds. Lane closure will need to be extended to obtain opening strengths. Please clarify max. cement content for RSC?
A69) Refer to Special Provisions Section 10-1.35 revised by Addendum No. 4, dated November 22, 2011. Amended Standard Specifications Section 40-2.01C "Cementitious Material" does not apply. There is no maximum cement content for Rapid Strength Concrete. 30Nov11.
Q70)Addendum #2 requires a compressive strength of 725 psi before subsequent paving operations may commence. Our supplier states the cure time is approximately 2.5 hours to reach the 725 psi compressive strength. Caltrans’ answer to Bidders’ Inquiry #41 stating that the maximum cement content is 675 pounds per cy rather than the 800 pounds normally used for RSC. Our supplier states the cure time to reach the 400 psi flexural strength required is approximately 5 hours. With a total cure time of 7.5 hours we have no time left to accomplish the following: 1. Set up lane closures 2. Remove concrete 3. Form and pour LCB (RS) 4. Form, set baskets, drill tie bars, and pour JPCP (RSC) 5. Take down lane closures Thus there is no time to do any work. The only alternative is to use a proprietary cement at an additional cost of approximately $150 per cy. Is this the intent of Caltrans?
A70) Refer to the Special Provisions revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q71)Is Caltrans aware that specifying 675 lb maximum cement content on the LCB and RSC, even with Type III cement, will require extended lane closure times, or cause significant reduction in production?
A71) Refer to the Special Provisions revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q72)Based on the contract documents and the state's previous answers, the JPCP RSC concrete - can only contain 505lbs to 675lbs cement per CY, must reach 400 psi MOR to open to traffic, 600psi MOR at 7 days, 650 psi MOR at 28days, max shrinkage at 28days drying is .05%, can not be proportioned by volume, must meet the thickness variance spec from section 40, and must be finished to meet the profile spec, and can only be placed with a buffer lane between the work and live traffic. This will be extremely challenging, are we correct in our summation?
A72) Refer to the Special Provisions revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q73)For LCB Rapid Setting concrete, it must reach 725psi compressive before JPCP RSC can be placed on top of it, and before traffic can use it, can not be proportioned by volume, must contain 270lbs of cement per CY minimum, 4% air max, max shrinkage at 28days drying is .05%, and not be placed without a buffer lane. This is an extremely challenging specification is our summation correct?
A73) Refer to the Special Provisions revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q74)For LCB RS is there a not to exceed strength?
A74) Refer to the Special Provisions revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q75) Please review/clarify your revised answer to question number 41. With the 505 to 675 lbs of cementitious material per cubic yard, the required cure time before opening would be around 6 hours. This would require the contract to take more than the maximum 500 working days to complete.
A75) Refer to the Special Provisions revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q76)Is this project held to 300 lbs max type III cement per section 28 for the LCBRS mixes? If not what is the max type III cement that can be used for LCBRS? Can the RSC pavement mix be used for as LCBRS? Also what psi is required for LCBRS before RSC concrete pavement can be placed on top; or does the LCBRS just need to meet 700 psi in 7 days of age per spec.
A76) Refer to the Special Provisions revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q77)Why does Cal Trans require an opening age of 725 psi for lean concrete base rapid set? The cure time to achieve this opening age coupled with the cure time for the jpcp does not allow for adequate time to construct the work in the lane closure windows allowed in this contract unless the contractor uses hydraulic cement. This will increase the cost of the bid to the State. Is it the State's intent to have the contractor use hydraulic cement?
A77) Refer to the Special Provisions revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q78) It is our understanding Caltrans, based on the Standard Specifications and Special Conditions, Section 10-1.24 Lean Concrete Base, RSC, and Section 10-1.35 Jointed Plain Concrete Pavements, RSC, has specified all concrete pavements must be mixed by use of a concrete batch plant and not a volumetric mixing system. By addendum No. 2, the “LCBRS” must reach the design strength of 750 Psi, utilizing a 2:1 ratio cylinder, prior to placement of concrete pavements. Please realize the opening strength for LCB is not achievable in the time allotted by Contract; and subsequently placement of JPCP RSC cannot be placed in the same shift. Please confirm Caltrans has an understanding, both in methodology and material conformance, the specified criteria will not have to be met.
A78) Refer to the Special Provisions revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q79)In the forthcoming addendum 4 please fix dowel bar drill and bond qty. Contract language is worded for payment of 9 inches per bar and SOQ was created with 18 inches per bar. Change the payment language or change the quantity via addendum.
A79) The quantity for Dowel Bar (Drill and Bond) in the "Bid Item List" was revised by Addendum No. 4, dated November 22, 2011. 30Nov11.
Q80)Please add volumetric proportioning of concrete spec to all "rapid" versions of concrete.
A80) Refer to the answer to Question 9. 30Nov11.
Q81) Please revise wording in addendum 4 for Lean Concrete Base Rapid Setting. 10-1.24 LCBRS - Construction - General - LCBRS must have a strength of 200PSI at opening age and a strength of 725PSI at 7 days age. Subsequent paving operations may commence after final set time of LCBRS. This doesn't work. The state did not redefine "final set time" for the LCBRS section, nor is it present in 1-4 Definitions, so we only have what it means other places in the specials, specifically, 10-1.34 Individual Slab Replacement, and 10-1.35 Jointed Plain Concrete Pavement (RSC), which define it as: time a specified penetration resistance of 4000PSI is achieved, determined under ASTM C 403. The testing for subsequent paving operations should be allowed at or before it is allowed to opened to traffic. The contractor will already be testing the LCBRS for compressive strength for opening age and 7 day strength with cylinders and be testing JPCP RSC for flexural strength with beams for opening and 7 day, can you redefine final set time for LCBRS or make subsequent paving ok after or near when we get opening age strength.
A81) The bidder is correct in their interpretation of "final set time" being a penetration resistance of 4,000 psi measured under ASTM C 403. It should be noted that ASTM C 403 and the test method for compressive strength (California Test 521) are different, and penetration resistance is a different characteristic from compressive strength. Refer to ASTM C 403 and California Test 521. 28Nov11.