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Question
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Date:
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4/19/2019 3:53:47 PM
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If we increase the size of the bar to 1 1/4" x 1 1/4" and thread the bar for a 1 1/4" nut, we have met the intent of upset threaded ends
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Answer
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Date:
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4/23/2019 9:04:57 AM
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For the instance of replacing the 7/8" x 7/8" bar with upset threads with 1 1/4" x 1 1/4" bar, threaded for a 1 1/4" nut for hanger rods L2, L3, L4, L5 and L6 ; the requirement of upset threads will have been met.
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Question
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Date:
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4/18/2019 12:30:04 PM
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Can threaded 1 1/4" x 1 1/4" bar b used in place of the 7/8" x 7/8" bar with upset threads for the hanger rods at L2,L3,L4, L5 and L6?
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Answer
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Date:
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4/19/2019 10:25:57 AM
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It is acceptable to increase the size of the bar from 7/8” x 7/8” to 1 ¼” x 1 ¼”. The shop drawings shall address any impacts this has to the geometry of the hanger assembly and minimum edge distances shall be maintained.
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Question
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Date:
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4/18/2019 12:25:18 PM
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Can threaded 1 1/8" threaded be used in place of the round 7/8" diameter hanger bar with upset threads?
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Answer
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Date:
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4/19/2019 10:28:12 AM
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The Department assumes that the question is asking if threaded 1 1/8” diameter rods can be used. It is acceptable to increase the size of the rod from 7/8” to 1 1/8”. The length of the threads shall be as shown in the plans, the rod cannot be threaded full length. The shop drawings shall address any impacts this has to the geometry of the hanger assembly and minimum edge distances shall be maintained.
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Question
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Date:
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4/19/2019 3:48:19 PM
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Confirming that , by using the 1 1/8" diameter treaded bar, we are meeting the intent of "Upset Threaded Ends" and will not still be required to supply upset threaded ends on the larger diameter rod?
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Answer
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Date:
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Question
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Date:
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4/18/2019 11:52:50 AM
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Notes on plan sheet 3 of 25 require the truss to be erected in the shop by the fabricator. The truss is too tall to be vertically erected in the shop. The fabricator can only assemble the two individual truss sections on the ground but will not be able to assemble the complete bridge in the shop. As full assembly must be done outside, is it permissible for the contractor/fabricator to assume risk of transport of any misfit parts and assemble the bridge in the field only?
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Answer
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Date:
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4/19/2019 10:22:27 AM
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The truss shall be erected at the shop by the fabricator to ensure proper fit-up and alignment. The erected truss shall be inspected and approved by the Engineer prior to shipment to the field. The contractor shall not ship any parts prior to the shop fit-up and inspection.
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Question
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Date:
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4/19/2019 10:50:57 AM
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Can you clarify is this the individual truss panels ( which could be done on the ground) or the complete bridge to include upper struts and lateral bracing?
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Answer
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Date:
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4/23/2019 9:05:47 AM
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The intent of this plan note is for the contractor to erect the truss in it's entirety at the shop prior to delivery to the project site.
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Question
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Date:
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4/17/2019 8:55:55 AM
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Please confirm that the truss posts, portals, struts and top lateral braces do not get galvanized prior to painting. Basically no items above the floor system, except rail posts, are to be galvanized. Items above the floor system will be painted only.
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Answer
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Date:
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4/19/2019 10:23:35 AM
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The assumption is correct. No items above the floor system, with the exception of rail posts, are to be galvanized. Items above the floor system will be painted only.
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Question
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Date:
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4/10/2019 4:32:44 PM
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Please provide a source for the rods with upset threads? Also, what is the diameter of the upset threads on the Truss Hangers (L1U1, L7U7) and the Floorbeam Hanger Rods shown on sheet 19 of 25.
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Answer
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Date:
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4/12/2019 11:14:49 AM
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The rods with upset ends shall be fabricated in an AISC certified shop. The minimum net area thru the threads shall meet or exceed the gross area of the member.
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Question
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Date:
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4/17/2019 9:00:26 AM
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Will it be acceptable to weld (CJP) the threads from a larger rod onto the body of a smaller rod in order to recreate upset threads provided the welding is performed in accordance with Fracture Critical provisions?
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Answer
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Date:
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4/19/2019 10:22:49 AM
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Welding is not the preferred method of fabrication. If it can be proven to the Department that welding is the only viable means to recreate the upset threads, permission will be considered as long as all the fracture critical requirements are met.
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Question
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Date:
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4/4/2019 2:03:57 PM
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The manufacturer of the U bolts has indicated they cannot manufacture fracture critical members at their facility. Can this requirement be waived? If not , can you provide a means of outside testing that would permit use of u bolts that were manufactured at a facility that does not have the fracture critical endorsement?
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Answer
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Date:
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4/23/2019 8:52:43 AM
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If the U bolts are fabricated as a single steel member with upset ends as shown in the plans, a successful proof load on a test sample would be considered a means to satisfy the testing requirement. If any modifications are proposed to the fabrication procedures that requires welding, the U bolts shall be fabricated at a plant that is AISC certified with Fracture Critical endorsement. During fabrication the material must be verified.
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Question
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Date:
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4/1/2019 3:40:40 PM
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Would it be possible to post the bridge pictures from the pre bid slide presentation?
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Answer
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Date:
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4/3/2019 1:21:27 PM
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The pictures are posted in ProjectWise.
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Question
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Date:
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4/1/2019 3:35:02 PM
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DHR does not maintain an "approved list" of masonry contractors. It is only a directory of individuals and companies that have varying levels of historic building experience that have requested inclusion in the directory. I do not believe any of the listed firm with masonry experience are currently prequalified with the VDOT. Will the VDOT waive the requirement for prequalification of the masonry subcontractor?
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Answer
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Date:
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4/12/2019 12:22:35 PM
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No, the VDOT prequalification requirement will not be waived. Revision 1 has removed the DHR requirement.
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Question
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Date:
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3/29/2019 9:19:28 AM
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Is the timber curb considered incidental to the truss railing and the Texas T-6 railing or is it included in Bid Item 0360 Lumber, Treated
Is the curb continuous over the intermediate piers on the approach spans?
Are we correct that the first and last rail post on the truss is located at the C/L of the truss pin?
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Answer
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Date:
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4/4/2019 11:25:59 AM
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The timber curb is included in the quantity provided for Lumber, Treated. The curb is continuous over the intermediate piers, see sheet 22 of 25. The first and last rail post on the truss is located 4’-9” from the truss pin, see sheet 23 of 25.
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