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Project Info
Order Number UPC State Project Number Last Date to Post Questions
K61 118375 0058-133-459,C501,B616 2/23/2024
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    The last date to post questions has passed. Any questions posed 72 hours before the letting date may not be answered. Export Q&A    
Question List
Subject: Tooth Expansion Assembly, item 0700 Type: Specifications
Question Date: 2/21/2024 3:58:56 PM
Would the department consider allowing hot dip galvanized tooth expansion joint in lieu of thermal spray coating? This option would be a cost savings and would follow our standard practices for tooth damns.  
Answer   Date: 2/23/2024 8:12:59 AM
Thermal spray coating is required for the tooth joints.  
Subject: Request to Postpone Bid Date Type: Proposal
Question Date: 2/20/2024 3:41:15 PM
Please consider delaying the bid date to allow enough time to prepare a competitive and complete proposal. At this time, we have been unable to secure vendors for certain items of work and need additional time to do so. Thank you for your consideration.  
Answer   Date: 2/21/2024 11:50:59 AM
There will be no delay in the receipt of bids. The Letting date of 2/28 will remain as is.  
Subject: EPS GeoFoam density Type: Specifications
Question Date: 2/13/2024 3:53:20 PM
Please clarify the correct type and density of EPS GeoFoam to use for roadway fill. No single type of block meets all criteria in Table 1 of the specification. The densities listed, 1.25 and 1.5, are typical for type II EPS AKA EPS22. It has 1.35 lb minimum, nominally 1.5 lb. But the compressive resistance @ 1% is 7.3 psi, and the chart requires 17.5 or 22.5 psi @ 1%. The only Geofoam that achieves that kind of compressive resistance @ 1% is EPS46, which is 50 psi, and is 2.85 lb density, not 1.35 lb or 1.5 lb. EPS46 is 18.6 psi @ 1%, which meets one requirement, but not the 22.5 psi requirement. There is no known EPS foam that reaches 22.5 psi @ 1% deformation. There’s only one denser foam than EPS46, and that’s full 3 lb EPS (not technically Geofoam), which is 60 psi at 10%, but not tested at 1%. It’s 3 pcf, not the 1.35 lb or 1.5 lb listed. Please advise.  
Answer   Date: 2/15/2024 8:35:54 AM
The EPS designations will be revised from EPS 50 to EPS 22and EPS 70 to EPS 29 via a forthcoming addendum. Additionally, the Compressive Resistances at 1% strain for EPS 50 and EPS 70 shown in Table 1 of the Special Provision for EPS Fill as 17.5 psi and 22.5 psi, respectively, are maximum compressive strengths, not the Compressive Resistance at 1% strain (or the Elastic-Limit Stress). The Plans and Special Provision will be revised in a future addendum as follows: • EPS 50 will be changed to EPS22. • EPS 70 will be changed to EPS29. • In Table 1 of the Special Provision, EPS 22 will be shown to have a Minimum Density of 1.35 pcf and a Compressive Resistance at 1% strain of 7.3 psi. • In Table 1 of the Special Provision, EPS 29 will be shown to have a Minimum Density of 1.80 pcf and a Compressive Resistance at 1% strain of 10.9 psi.  
Subject: Substitution/Alternative to Geofoam Lightweight Fill Type: Specifications
Question Date: 2/13/2024 9:23:05 AM
Would the owner be willing to consider low density cellular concrete that meets and exceeds the minimum compressive strength requirements stated in the project specifications as an alternative to the specified EPS Block Fill? Although cellular concrete is heavier than EPS, it does not require a percentage of material compression to achieve strength. It is also lighter than traditional flowable fill, soil and stone structural fills, which could induce additional loading and settlement of onsite soils. Additional benefits to cellular concrete are: - Does not dissolve if exposed to petroleum products. - Self-leveling and can fit any shape without being trimmed. Once cured, it becomes a self-supporting mass within a few hours of pour. - Self-consolidating, so no voids between blocks which could induce future settlement. - Can be placed in larger lifts and does not require compaction testing like soil and imported stone fills. - Does not require large laydown or stockpile areas as it’s mixed and produced on site using a mobile batch plant. - Can be pumped up to several thousand feet at very low pressures. - Can exhibit coefficients of permeability similar to that of onsite soils. The provided 25 pcf mix design is on the order of 1.5 cm/second. The permeability can be adjusted by changing the wet cast density and preformed foam. - Reduction in uplift potential since the cellular concrete is heavier than the EPS blocks. - Can be excavated with conventional earth moving equipment.  
Answer   Date: 2/14/2024 4:02:40 PM
The proposed change to low density cellular concrete would likely result in increased settlements beyond those assumed in the current design and will not be considered at this time. After award, the contractor may submit a Value Engineering Proposal per the VDOT Road and Bridge Specifications Section 104.02 c.  
Subject: MASS CONCRETE Type: Plan
Question Date: 2/12/2024 1:35:36 PM
Is the Bridge Substructure Concrete Class A4 in the piers considered mass concrete? If yes, please provide Mass Concrete Specifications. Thank you  
Answer   Date: 2/14/2024 7:55:38 AM
The Concrete Class A4 in the pier caps is mass concrete as defined by VDOT SP217-000120 (Special Provision for Massive Construction Hydraulic Cement Concrete Operations) and shall adhere to VDOT SP217-000120. VDOT SP217-000120 will be provided in a future addendum. Concrete in pier footings shall adhere to the Concrete Class A4 (substructure) SPCN. All pier concrete shall adhere to Section 217 and 404 of the VDOT Road and Bridge Spec.  
Subject: Bridge Parapet F-Shape Type: Plan
Question Date: 2/6/2024 3:26:46 PM
Plan sheet 44 of 78 shows F-Shape bridge parapet with the title block "42" Cast - in - Place Concrete Parapet (F-SHAPE)." Is there a specific reason this has to be cast-in-place, or can it be slipformed? Thank you.  
Answer   Date: 2/7/2024 11:57:50 AM
Concrete barriers shall be constructed per Section 410.03(c) of the VDOT R&B Specifications. The use of the extrusion method (or slipforming) for concrete placement requires the Engineer’s approval. If the extrusion method is approved, the Contractor must conform to additional requirements in Section 410.03(c).  
Subject: Prestressed Concrete Pile Type: Plan
Question Date: 2/6/2024 10:18:03 AM
Bid Item 520 Prestressed Concrete Piles has a quantity of 4,200 LF Based on Pile Data tables on plan sheets 6 of 78 through 19 of 78, the following is observed: Based on Top of Pile elevation and Estimated Tip elevation, quantity = 5,723.50 LF Based on Top of Pile elevation and Minimum Tip elevation, quantity = 4,853.50 LF Please clarify the correct bid quantity.  
Answer   Date: 2/7/2024 11:57:07 AM
Prestressed concrete pile quantities are based on estimated tip elevations. Refer to an upcoming addendum for revised quantities (Total Prestressed Concrete Carbon Steel Strands Piles 18”: 5,455 LF and Driving Test Pile for Prestressed Concrete Pile 18”: 336 LF).  

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