15-Scope of Work for Installation and Repair of Brick Pavers and Segmental Retaining Walls.pdf
PDF 218 KB Posted
- Solicitation number
- YR-208239
- Issued by
- Dallas County, Texas
About this file
This Scope of Work document is issued by Dallas Independent School District's (Dallas ISD) Maintenance & Facility Services for installation and repair of brick pavers and segmental retaining walls districtwide on an as-needed basis. The project involves comprehensive services for two primary areas: brick paver installation/repair and segmental retaining wall installation/repair. Work will be performed districtwide during allowable hours of Monday-Friday and weekends from 7:00 AM - 7:00 PM. Contractors must obtain a Dallas ISD badge, provide proof of General Liability and Workers' Compensation insurance, and comply with safety requirements including wearing proper personal protective equipment. The scope includes detailed specifications for site preparation, excavation, material placement, wall/paver installation techniques, and quality assurance processes.
The contract requires contractors to provide all necessary labor, tools, machinery, and equipment to complete projects according to specified standards, including adherence to Interlocking Concrete Pavement Institute (ICPI), National Concrete Masonry Association (NCMA), and Concrete Masonry & Hardscapes Association (CHMA) guidelines. Key technical requirements include using specific materials like C-33 concrete sand, compacting sub-bases, installing drainage systems, and ensuring proper wall/paver alignment and stability. Contractors must conduct site previews, mark work areas, provide porta-potties for longer projects, and conduct final walkthroughs with a Dallas ISD Maintenance representative. The contract includes a one-year warranty on all work performed and materials, with specific instructions for handling irrigation systems, managing excavated materials, and ensuring proper drainage and appearance of completed installations.
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Text version
Scope of Work - Installation and Repair of Brick Pavers and Segmental Retaining Walls
Dallas ISD is seeking proposals for the installation, repair, and replacement of brick pavers and segmental retaining walls districtwide, on an as-needed basis.
Installation and Repair of Brick Pavers
Project Overview
To install and repair brick pavers in designated areas, restoring functionality, safety, and appearance.
Work will eliminate uneven surfaces, trip hazards, and deterioration while ensuring long-term durability.
General Requirements
● The awarded contractor shall provide all labor, tools, machinery, and equipment necessary to complete the project in accordance with these specifications.
● Allowable Work Hours
○ Monday - Friday: 7:00 AM - 7:00 PM
○ Weekends: 7:00 AM - 7:00 PM
Services Required
● Compliance & Safety
○ All contractors must obtain a Dallas ISD badge before beginning work through Dallas ISD iSuppler.
○ Proof of General Liability (GL) and Workers’ Compensation (WC) insurance is required before project participation.
○ Contractors and their employees must wear proper personal protective equipment (PPE) while on Dallas ISD sites.
○ Contractor must provide porta-potties for projects lasting more than three (3) days;
units must remain locked during idle hours.
○ Work areas must be clearly marked by the contractor, with line locates called in to https://texas811.org, and secured with flags, spray paint, stakes, or tape.
● Site Preparation & Excavation
○ Contractor must preview the project site with a Dallas ISD representative before submitting an estimate.
○ Perform all necessary excavation of existing soils or demolition of existing concrete to incorporate a 7.5-inch-thick flexible paving system.
○ Compact the sub-base prior to flex base placement.
○ Place compacted flex base at a minimum depth of four (4) inches, using a vibratory plate compactor with adequate moisture (water percentage must be 5%).
○ Provide and install 4-inch-diameter irrigation sleeves in designated areas, staking their locations.
○ Haul away all excavated soils, concrete, and debris.
Docusign Envelope ID: 8FDF1216-6ED8-4E5C-BE13-1A1A9C364467
○ Repair any damage to the irrigation system caused during excavation before project completion. Irrigation heads may not be capped without Dallas ISD approval.
● Paver Installation
○ Place screeded C-33 concrete sand not exceeding one (1) inch in depth.
○ Install pavers in accordance with Interlocking Concrete Pavement Institute (ICPI) standard construction practices.
○ Restrain all paver edges with a reinforced concrete toe edge restraint system. The concrete toe must not come within one (1) inch of the top surface of the edge paver.
○ Use a motorized masonry saw for all paver cuts.
○ Replace broken paver units after plate compaction.
○ Sweep excess C-33 paver joint sand and wash the slab upon completion.
○ Cover reinforced concrete toe edge restraint system with native soil generated from excavation.
○ Provide thorough cleaning and sealing of all newly installed or repaired paver areas to ensure durability, appearance, and protection against weathering and staining.
● Quality Assurance & Finalization
○ Apply ADA-compliant grades where required.
○ Clean up and remove all debris.
○ Conduct a final walkthrough with a Dallas ISD Maintenance representative to confirm project completion.
○ Contractor must provide a one-year warranty on all work performed and materials.
● Special Conditions
○ Services may be required in enclosed courtyards or other restricted-access areas, which could require additional manual labor due to equipment limitations.
Installation and Repair of Segmental Retaining Walls
Project Overview
To install and repair segmental retaining walls that provide structural stability, control soil erosion, and improve the landscape’s appearance.
General Requirements
● The awarded contractor shall provide all labor, tools, machinery, and equipment necessary to complete the project in accordance with these specifications.
● Allowable Work Hours
○ Monday - Friday: 7:00 AM - 7:00 PM
○ Weekends: 7:00 AM - 7:00 PM
Services Required
● Compliance & Safety
○ All contractors must obtain a Dallas ISD badge before beginning work through Dallas
ISD iSuppler.
○ Proof of General Liability (GL) and Workers’ Compensation (WC) insurance is required before project participation.
○ Contractor must preview the project site with a Dallas ISD representative before submitting an estimate.
○ Work areas must be clearly marked by the contractor, with line locates called in to https://texas811.org, and secured with flags, spray paint, stakes, or tape.
○ Contractor must provide porta-potties for projects lasting more than three (3) days;
units must remain locked during idle hours.
○ All contractor employees must wear proper personal protective equipment (PPE) while on Dallas ISD sites.
● Site Preparation & Excavation
○ Perform required excavation of soils, demolition of concrete, or removal of railroad ties as needed to incorporate the Gravity Segmental Retaining Wall System.
○ Haul away all excess soil, concrete, and railroad ties.
○ Repair any damage to the irrigation system caused during excavation before project completion. Irrigation heads may not be capped without Dallas ISD approval.
○ Provide and install 4-inch-diameter irrigation sleeves in designated areas, staking their locations if required.
○ Compact the sub-base prior to flex base footing placement.
○ Place compacted flex base footing at a minimum depth of six (6) inches, using a vibratory plate compactor with proper moisture content.
● Wall Installation
○ Place screeded C-33 concrete sand, not exceeding one (1) inch in depth, for the first below-grade block course.
○ Install segmental retaining wall blocks plumb and in accordance with National
Concrete Masonry Association (NCMA) standard construction practices before stacking additional courses.
○ Install a 4-inch-diameter perforated corrugated sock drain, daylighted every 40 linear feet.
○ Place a minimum of 12 inches of angular, free-draining drainage aggregate (1.0”–1.5” in diameter) one foot behind the wall and within block cores.
○ Compact native backfill in lifts not exceeding the height of the chosen wall block, using a jumping jack or vibratory plate compactor.
○ Apply one layer of 4 oz. filter fabric horizontally above the drainage aggregate zone.
○ Use a motorized masonry saw for all cap block cuts and provide appropriate wall cap adhesive.
○ Grade the soil above and behind the wall to ensure positive drainage.
○ Clean and seal all completed retaining wall surfaces to enhance longevity, prevent staining, and protect against weathering and moisture intrusion.
● Quality Assurance & Finalization
○ Screened fill dirt must be approved by a Dallas ISD representative before use.
○ Clean up and haul off all wall debris.
○ Contractor must provide a one-year warranty on all work performed and materials.
○ Conduct a final walkthrough with a Dallas ISD Maintenance representative to confirm project completion.
Website link for standards: Concrete Masonry & Hardscapes Association (CHMA) Interlocking Concrete Pavement Institute (ICPI)
National Concrete Masonry Association (NCMA)
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