321441_rock_stairways_MAA.pdf
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- Attached to
- 127EAW23R0013 - GAOA Lytle Creek Improvements
- Solicitation number
- 127EAW23R0013
- Issued by
-
Department of Agriculture Forest Service
About this file
This document outlines specifications for constructing an overlapping rock stairway and related earthwork. The project involves constructing rock stairways at the Bonita Falls Day Use Parking area according to the provided drawings and specifications. Key details include using sound durable rock free of defects to form overlapping steps secured with two or more contact points. The subgrade must be cleared, grubbed, graded and compacted according to separate specifications. Measurement will be based on the number of completed rock steps.
The related federal contract opportunity is for improvements to Lytle Creek in the San Bernardino National Forest. The project budget is between $1,000,000 to $5,000,000 and is set aside solely for small businesses. Interested offerors should submit any requests for information to the contracting officer by May 16, 2023 and a pre-proposal site visit will not be held, though the locations are open to the public.
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Text version
OVERLAPPING ROCK STAIRWAYS 321441-1
USDA FOREST SERVICE, R5
BONITA FALLS DAY USE PARKING RECONSTRUCTION
SECTION 321441 – OVERLAPPING ROCK STAIRWAYS
PART 1 - GENERAL
1.1 This item shall consist of furnishing all necessary labor and materials required to construct an overlapping rock stairway, as shown on the drawings. The stairway alignment shall be staked in the field by the Contractor and approved by the Contracting Officer.
1.2 RELATED SECTIONS
A. Section 311000 “Clearing and Grubbing”
B. Section 312000 “Earthwork”
1.3 MEASUREMENT AND PAYMENT
A. The quantity to be measured shall be the number of overlapping rock steps (EA) needed to complete the stairway. Work also includes necessary clearing, grubbing, and earthwork to construct the subgrade.
PART 2 - MATERIALS
2.1 ROCK
A. Use sound, durable rock free of rifts, seams, laminations, and minerals that could deteriorate due to weathering. Rock may be obtained on site if it meets the material requirements outlined above or obtained commercially.
PART 3 - EXECUTION
3.1 GENERAL
A. The area for construction for stairways shall be cleared and grubbed in accordance with the drawings and specifications Section 311000 “Clearing and Grubbing.”
B. The subgrade shall be graded and shaped for construction of the stairways as provided by the line and grades shown on the drawings. Construction and compaction of subgrade shall be in accordance with specification section 312000 “Earthwork.”
C. Conserve and use all suitable material for specific work. Place excess and unsuitable excavation beyond the downslope edge of the trailbed.
3.2 COMPACTION
OVERLAPPING ROCK STAIRWAYS 321441-2
A. Compact backfill in 6 inch lifts for minimum three (3) complete passes and until visual displacement of subgrade material has ceased.
3.3 CONSTRUCTION
A. Use rocks of a general rectangular shape. Prior to use, dress rock as necessary to remove thin or weak portion before use.
B. Install overlapping steps as shown on the drawings. Start construction at the bottom rock.
Then form the entire tread and riser with single rocks and provide two (2) or more contact points for stability.
3.4 FINISH GRADING
A. All surfaces and slopes shall be shaped to blend with the original undisturbed ground surface, mounded over or smoothed off, hand raked, and left in a uniform and neat condition.
END OF SECTION 321441
November 2022
File details come from the government source that posted it. Updated .