|
Question
|
|
Date:
|
8/18/2021 5:07:31 PM
|
|
Is spiral weld pipe allowed for the drilled shaft permanent steel casing?
|
|
Answer
|
Date:
|
8/20/2021 1:00:09 PM
|
|
The Department will not allow the use of spiral weld pipe for the permanent casings in the drilled shafts.
|
|
|
|
|
|
Question
|
|
Date:
|
8/16/2021 11:11:03 AM
|
|
The reinforcing steel for the drilled shafts, 25,360lbs, is not included for pay in the drilled shaft items and is also not included in the quantities in the proposal schedule of items. How does the department intend to pay for this material?
|
|
Answer
|
Date:
|
8/17/2021 9:06:16 AM
|
|
The reinforcing steel for drilled shafts is in the proposal schedule list of items (Proposal Line Number 0540) for the quantity of 25,360 lbs.
|
|
|
|
|
|
Question
|
|
Date:
|
8/16/2021 9:11:36 AM
|
|
As noted on sheet 9, the bridge will be inundated during high water events. Please provide the stream velocity during the design storm so that we may determine the stream flow loading that the bridge will be subject due during this event. Also please confirm that the high water elevation of 253.4 as shown on the section view on sheet 1 is the appropriate elevation for the design storm, or provide a different one.
|
|
Answer
|
Date:
|
8/19/2021 9:01:00 AM
|
|
The Hydraulics Report is now available in ProjectWise. The high water stage elevation of 253.4 shown on Plan Sheet 1 exceeds the 200 year storm event. Therefore the structure would not be required to be designed to the high water storm event shown in these plans. The Hydraulics Report provides flood stage elevations and velocities for each storm event up to and including the 200 year event (Exceedance probability 0.5%). The superstructure shall be designed for storm events up to and including the 200 year storm event.
|
|
|
|
|
|
Question
|
|
Date:
|
8/12/2021 11:44:48 AM
|
|
Due to the remote location of this project we cannot get a pre-bid commitment from a concrete supplier. Per Specification 217.09 (b), Each batch of concrete shall be delivered to the site of work and discharged within 90 minutes of the time the cement is introduced into the mixture unless the Engineer approves otherwise. Can the Engineer approve an increased discharge time, and/or can VDOT provide contact information for a concrete supplier who can service this project?
|
|
Answer
|
Date:
|
8/16/2021 4:14:12 PM
|
|
The Department does not approve an increased discharge time. The following list of concrete plants are approved for VDOT work and within 45 minutes of the project site:
Allied Concrete
209 Krete Lane
New Canton, VA
(434) 220-3214
WC Newman
10630 Prince Edward Hwy
Prospect, VA
(434) 392-4241
SB Cox
1918 Anderson Hwy
Powhatan, VA
(804) 379-7751
|
|
|
|
|
|
Question
|
|
Date:
|
8/20/2021 2:14:09 PM
|
|
We have reached out to all of the suppliers you listed and a few more, Even with the added time, we can not get anyone to commit. Do you know of anyone else?
|
|
Answer
|
Date:
|
8/23/2021 3:30:07 PM
|
|
Contractors are encouraged to work with an approved supplier capable of meeting the terms of the contract, with extended discharge time (150 min maximum with proper application of retarder). Please bid accordingly.
|
|
|
|
|
|
Question
|
|
Date:
|
8/18/2021 9:37:38 AM
|
|
We request you revisit the response to the above question. We have also contacted the concrete plants and cannot obtain a commitment to service the project.
|
|
Answer
|
Date:
|
8/20/2021 10:23:14 AM
|
|
After additional consideration, the Department will extend the discharge limit to a maximum of 150 minutes with the proper application of retarder.
|
|
|
|
|
|
Question
|
|
Date:
|
8/17/2021 2:06:40 PM
|
|
We have reached out to all of those suppliers plus several others. All of those suppliers have concerns about delivering concrete to the project due to the 90 minute discharge per the specs. If it takes about 15 minutes to batch, plus 45 minutes haul time, plus 15 minutes to test onsite, then at best there is only 15 minutes to unload a truck before it is out of spec. During some of the larger pours, a truck may end up onsite while the previous truck is discharging will have to wait. This does not leave a reasonable about of time to unload the trucks. Per the 2007 VDOT Road and Bridge Specification 217.09(b), there is a table that listed maximum discharge times based on temperature and whether retarder was added to the mix. This would give the Department an uncompromised mix and allow the contractor a reasonable amount of time to receive and discharge concrete. Would the Department consider using this specification for the concrete on this project?
|
|
Answer
|
Date:
|
8/20/2021 10:23:33 AM
|
|
After additional consideration, the Department will extend the discharge limit to a maximum of 150 minutes with the proper application of retarder.
|
|
|
|
|
|
Question
|
|
Date:
|
8/20/2021 2:14:09 PM
|
|
We have reached out to all of the suppliers you listed and a few more, Even with the added time, we can not get anyone to commit. Do you know of anyone else?
|
|
Answer
|
Date:
|
8/23/2021 3:30:07 PM
|
|
Contractors are encouraged to work with an approved supplier capable of meeting the terms of the contract, with extended discharge time (150 min maximum with proper application of retarder). Please bid accordingly.
|
|
|
|
|
|
Question
|
|
Date:
|
8/18/2021 9:37:38 AM
|
|
We request you revisit the response to the above question. We have also contacted the concrete plants and cannot obtain a commitment to service the project.
|
|
Answer
|
Date:
|
8/20/2021 10:23:14 AM
|
|
After additional consideration, the Department will extend the discharge limit to a maximum of 150 minutes with the proper application of retarder.
|
|
|
|
|
|
Question
|
|
Date:
|
8/17/2021 2:06:40 PM
|
|
We have reached out to all of those suppliers plus several others. All of those suppliers have concerns about delivering concrete to the project due to the 90 minute discharge per the specs. If it takes about 15 minutes to batch, plus 45 minutes haul time, plus 15 minutes to test onsite, then at best there is only 15 minutes to unload a truck before it is out of spec. During some of the larger pours, a truck may end up onsite while the previous truck is discharging will have to wait. This does not leave a reasonable about of time to unload the trucks. Per the 2007 VDOT Road and Bridge Specification 217.09(b), there is a table that listed maximum discharge times based on temperature and whether retarder was added to the mix. This would give the Department an uncompromised mix and allow the contractor a reasonable amount of time to receive and discharge concrete. Would the Department consider using this specification for the concrete on this project?
|
|
Answer
|
Date:
|
8/20/2021 10:23:33 AM
|
|
After additional consideration, the Department will extend the discharge limit to a maximum of 150 minutes with the proper application of retarder.
|
|
|
|
|
|
Question
|
|
Date:
|
8/9/2021 8:22:51 AM
|
|
Can VDOT post existing bridge plans?
|
|
Answer
|
Date:
|
8/11/2021 1:38:35 PM
|
|
As noted on Sheet 2 of the Bridge Plans, existing plans are not available.
|
|
|
|
|
Displaying questions 1 - 5 (of 5)
Page:
1 First Previous Next Last
|