MODIFICATION
Z -- WHITAKER BRIDGE REMEDIATION ACTION
- Notice Date
- 6/8/2010
- Notice Type
- Modification/Amendment
- NAICS
- 237310
— Highway, Street, and Bridge Construction
- Contracting Office
- BLM MT WESTERN DISTRICT OFC(MTB000)106 N. PARKMONTBUTTEMT59701US
- ZIP Code
- 00000
- Solicitation Number
- L10PS01262
- Response Due
- 6/16/2010
- Archive Date
- 7/16/2010
- Point of Contact
- Jaclyn K Woods
- Small Business Set-Aside
- N/A
- Description
- Amend #11. On S3, it mentions "field bend #4 rebars existing". Is this an action we have to perform or is this left from the original plans? Informational from the original plans so the contractor knows what is there. 2. I was wondering if the engineering firm had calculated the reaction at the end of one of these girders (dead load only). It would be helpfulin determining what I would use to raise the end of the beam. Or, if they could provide the weight of the beam /foot or the flange and web thickness or cross sectional area, I could go from there. BLM does not have historical design information of the bridge weight, nor specific sizes or weights of the beam, so it would be up to the Contractor to make their own estimation if needed. 3. Would we be allowed to use a hammer drill to drill the 24 - 1" holes for the plate collar? A hammer drill can be used for the concrete. However, if excessive damage occurs to the concrete due to the hammer drill in the first hole or so, another means should be requested. 4. Warranty- The engineering firm has far more expertise than myself but putting 24 - 1" holes into a failed concrete pier just scares me. My experience with small concrete patches such as this one tells me there could be a problem. I would expect the crack to return in less than a year even with the confinement collar. It is a difficult repair but I don't want to be held responsible if a crack returns within a year. Thisfailure - crack could have been caused by a cold joint, rapid dehydration from the sun in the west or improper curing, impact load or other and it will likely show up again. This concrete has been there for a significant amount of time. We expect that the crack has occurred due to shrinkage/expansion in the steel girder and is due to the lack of confinement steel. By cutting the slip holes in the girder, we do not expect this to show up again unless the holes get filled and the girders can't slip in the future.
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/DOI/BLM/MT/L10PS01262/listing.html)
- Record
- SN02172090-W 20100610/100608235702-2b6ffa7bc1e1f0db335de4ab35b6c265 (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
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