Lignite mines 180-7.79_LRATE_09242015.pdf
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- Attached to
- George Washington and Jefferson National Forests
- Solicitation number
- 693C73-23-B-000011
About this file
This solicitation is for road repairs within the George Washington and Jefferson National Forests in Virginia. The project consists of erosion control, clearing, grading, roadside cleanup, riprap installation, culvert replacement with pipe, box, and arch culverts, contractor design of box and open bottom arch culverts, aggregate surfacing, and other miscellaneous work split into multiple schedules. The cost is expected to be between $5 million and $10 million. Questions are due by May 9, 2023 with bids to follow at a later specified date. Annual representations and certifications must be completed on SAM.gov along with VETS-4212. Bidders must be registered in SAM for payment processing. Security protocols are outlined for facility access.
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I. INTRODUCTION
A load rating analysis was performed on all primary superstructure members. The analysis incorporated any deficiencies caused by deterioration, cracks, fractures, and loss of section found in the most recent inspection report. This analysis also examined any repairs completed since the construction of the structure. Both the inventory and operating ratings were computed in accordance with the LRFR methodology.
This report includes an analysis considering each of the federal legal vehicles (Type 3, Type 3S2, and Type 3-3) found in the latest edition of the Manual for Bridge Evaluation. Additionally, the analysis was performed for Specialized Hauling Vehicles (SHVs) which included the SU4, SU5, SU6, and SU7.
II. ASSUMPTIONS AND GENERAL INFORMATION
• Assumed timber species as Mixed Southern Pine No. 2
• Assumed ADTT less than 1000
III. BRIDGE CONFIGURATION AND RATING DESCRIPTION
This bridge has one span consisting of a laminated wood superstructure. The structure has an overall length of 17.7’ and a deck width of 16.25’.
STAAD Pro V8i and a Microsoft Excel spreadsheet were used to rate the superstructure.
IV. SECTION LOSSES/DEFICIENCIES
No section losses or deficiencies that would affect the load capacity were found in the critical stress regions of this structure based upon the latest bridge inspection report.
V. RECOMMENDATIONS
There are no recommendations at this time. This bridge does not require posting.
Appendix A
LOAD RATING SUMMARY
Load Rating Summary
Structure No.: 080815000003221 Road No.: 180 Bridge Name: S. Prg .Barbours Cr. Br./M. Culv. Mile Point: 7.790
Load Rating Summary DESIGN LOADS Rating Factor Tons Metric Tons
HL93 (INV) 0.845 30 27
HL93 (OPR) 1.096 39 35
LEGAL LOADS
TYPE 3 2.164 54 48
TYPE 3S2 2.373 94 85
TYPE 3-3 2.627 105 95
SU4 1.882 50 45
SU5 1.827 56 50
SU6 1.791 62 56
SU7 1.774 69 62
DESIGN LOADING: UNKNOWN
X CAPACITY MEETS OR EXCEEDS DESIGN LOAD
CAPACITY IS LESS THAN DESIGN LOAD
ORIGINAL LOAD RATING CALCULATION APPLICABLE
ORIGINAL LOAD RATING CALCULATION REVISED
DATE OF LOAD RATING CALCULATION: 9/24/2015
LOAD RATING CONTROLLED BY: INTERIOR/EXTERIOR GIRDER
LOAD RATING METHOD: LRFR
Rated By: Brad Montgomery, EI Checked by: Kyle Strachan, EI Date: 9/24/2015 Date: 9/28/2015
Remarks:
Appendix B
TYPICAL SECTION
N ot e:
D im en si on s f ro m m os t r ec en t f ie ld in sp ec tio n
Appendix C
COMPUTATIONS
| I. INTRODUCTION |
| II. ASSUMPTIONS AND GENERAL INFORMATION |
| III. BRIDGE CONFIGURATION AND RATING DESCRIPTION |
| IV. SECTION LOSSES/DEFICIENCIES |
| V. RECOMMENDATIONS |
File details come from the government source that posted it. Updated .