20-0141_Fencing__for_DPSCD_Schools_RFP.PDF

REQUEST FOR PROPOSAL (RFP)

RFP # 20-0141

Fencing for DPSCD Schools

RFP Release Date: Monday February 24, 2020

Written Questions Due: Wednesday March 11, 2020

On or before 4p.m.

Proposals Due: Thursday, March 19, 2020

On or before 4p.m.

Public Bid Opening: Thursday, March 19, 2020

At 4:15 p.m. at:

DETROIT PUBLIC SCHOOLS COMMUNITY DISTRICT

OFFICE OF PROCUREMENT AND LOGISTICS

FISHER BUILDING – 11TH FLOOR

3011 WEST GRAND BLVD

DETROIT, MICHIGAN 48202

(See Section L, Paragraph 2, ‘Submission Instructions’)

Detroit Public Schools Community District

3011West Grand Blvd.

Detroit, Michigan 48202

PREFACE

Background

Operations and Demographics

Detroit Public Schools Community District (DPSCD) provides a standard, traditional curriculum to a student body of approximately 50,000 students ranging from pre-kindergarten through the 12th grade. DPSCD also provides adult education at a variety of facilities during non-school hours. In addition to the standard curriculum, DPSCD offers a variety of specialized technical training programs for the higher-grade levels. The District encompasses an area of approximately 139 square miles. DPSCD operates 100 schools, including elementary (K-5), combination (K-8), middle schools, high schools and technical center schools.

RFP Document

Suppliers need to review this document carefully. An explanation of the sections and parts are outlined below:

Section A-J (Parts I, II & III) will form the body of the contract once both parties have signed Section A. Upon award and acceptance of the proposed work, these sections become the contract with the Offeror (Vendor/Contractor) and DPSCD and may include attachments containing terms, conditions and/or pricing specific the product or service being rendered. Section J (Part III) contains all attachments or additional supporting information.

Section K-M (Part IV) contains the representations and certifications all Suppliers must complete to meet the eligibility requirements (Section K). It also contains the format instructions to Suppliers for both the specific product or service and general terms and conditions for all RFPs (Section L). Section M outlines specific information about the eligibility requirements, evaluation criteria and general selection process.

DETROIT

PUBLIC

SCHOOLS

COMMUNITY

DISTRICT

Office of Procurement and Logistics

Fisher Building 11th Floor

3011 West Grand Blvd.

Detroit, MI 48202

SECTION A

Contract Cover

Page &

Signatures

1.Contract No.:

2. ITB/RFP No.: 20-0141

3. Contract Title:

Fencing

4. Contract Amount:

5. Contract Term:

6. Supplier Name:

Address:

City/State/Zip:

Contact: Telephone: e-mail/Fax:

7. Contract Table of Contents:

Section A: Contract Cover Page & Signatures

Section B: Schedule

Section C: Scope of Work/Service

Section D: Packaging and Marking (Reserved)

Section E: Inspection and Acceptance

Section F: Deliveries or Performance

Section G: Contract Administrative Data

Section H: Special Contract Requirements (Reserved)

Section I: General Contract Clauses

Section J: List of Attachments

8. Signature of Authorized Supplier

Representative:

Signature Date Signed

Print N Print Name: ______________________

Title: ___________________________

9. Signature of DPSCD:

Signature Date Signed

Prin Print Name: Nikolai P. Vitti, Ed.D.

Title: Superintendent

SECTION B

SCHEDULE

Supplier shall provide necessary labor, material, equipment, transportation, and supervision.

PRICING

Please provide Price Sheet – Attachment A included with proposal package. Include electronic copy of Price sheets.

Pricing must be all-inclusive of labor, materials, supplies, travel or any other necessary items. Pricing should include an applicable cost breakdown.

End of Section B

SECTION C

SCOPE OF SERVICE

SECTION 01 - SITE CLEARING AND DEMOLITION

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

A. All technical specifications, and contract language/requirements herein, apply to this Section.

1.2 SUMMARY

A. This Section includes the following:

1. Protecting existing trees and vegetation to remain.

2. Removing trees and other vegetation.

3. Clearing and grubbing.

4. Removing above-grade site improvements.

B. Related Sections include the following:

1. "Earthwork" for soil materials, excavating, backfilling, and site grading.

1.3 MATERIALS

A. Except for materials indicated to be stockpiled or to remain the property of

DPSCD, cleared materials shall become Contractor's property, shall be removed from the site and legally disposed of. All fencing, play equipment, signage etc, materials (ie. fence posts, fencing fabric, gates, hardware, concrete footings, unusable, excavation, etc.) shall be removed and disposed of by the contractor at no additional charge to the DPSCD.

B. All demolition and construction debris shall be loaded, transported, and disposed of by contractor.

1.4 QUALITY ASSURANCE

A. Pre-installation Conference: Conduct conference at project sites prior to construction start up.

1.5 PROJECT CONDITIONS

Traffic: Minimize interference with adjoining roads, streets, walks, parking lots, and other adjacent occupied facilities during construction and restoration operations.

1. Do not close or obstruct streets, walks, playground, or other adjacent occupied or facilities without permission from DPSCD and authorities having jurisdiction.

2. Provide alternate routes around closed or obstructed traffic ways if required by authorities having jurisdiction.

A. Improvements on Adjoining Property: If required, authority for performing indicated removal and alteration work on property adjoining DPSCD property will be obtained by DPSCD before award of Contract.

B. Salvable Improvements: Carefully remove items indicated to be salvaged and store on DPSCD's premises where indicated.

C. Conduct site clearing so DPSCD operations will not be disrupted.

3. Provide not less than 72 hours notice to DPSCD of activities that will affect

DPSCD's operations.

4. Maintain access to existing walkways, exits, and other adjacent occupied or used facilities.

a. Do not close or obstruct walkways, exits, or other occupied or used facilities without written permission from authorities having jurisdiction.

D. Hazardous Materials: It is not expected that hazardous materials will be encountered in the work.

1. If materials suspected of containing hazardous materials are encountered, do not disturb; immediately notify Architect and DPSCD. Hazardous materials will be removed by DPSCD under a separate contract.

E. Storage or sale on-site of items or materials to be removed is not permitted.

F. Notify utility locator service for utility locates prior to site clearing operations.

PART 2 - PRODUCTS (Not Applicable)

PART 3 - EXECUTION

3.1 PREPARATION

A. Protect and maintain benchmarks and survey control points from disturbance during construction.

B. Provide erosion-control measures to prevent soil erosion and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways.

C. Locate and clearly flag trees and vegetation to remain or to be relocated.

D. Protect existing site improvements to remain from damage during construction.

1. Restore damaged improvements to their original condition, as acceptable to

DPSCD.

3.2 TREE PROTECTION

A. Erect and maintain a temporary fence around drip line of individual trees or around perimeter drip line of groups of trees to remain. Remove fence when construction is complete.

1. Do not store construction materials, debris, or excavated material within drip line of remaining trees.

2. Do not permit vehicles, equipment, or foot traffic within drip line of remaining trees.

B. Do not excavate within drip line of trees, unless otherwise indicated.

C. Where excavation for new construction is required within drip line of trees, hand clear and excavate to minimize damage to root systems. Use narrow-tine spading forks, comb soil to expose roots, and cleanly cut roots as close to excavation as possible.

1. Cover exposed roots with burlap and water regularly.

2. Temporarily support and protect roots from damage until they are permanently relocated and covered with soil.

3. Coat cut faces of roots more than 1-1/2 inches (38 mm) in diameter with an emulsified asphalt or other approved coating formulated for use on damaged plant tissues.

4. Cover exposed roots with wet burlap to prevent roots from drying out.

Backfill with soil as soon as possible.

D. Repair or replace trees and vegetation indicated to remain that are damaged by construction operations, in a manner approved by Architect.

1. Employ a qualified arborist, licensed in jurisdiction of the project, to submit details of proposed repairs and to repair damage to trees and shrubs.

2. Replace trees that cannot be repaired and restored to full-growth status, as determined by the qualified arborist.

3.3 UTILITIES

A. Existing Utilities: Do not interrupt utilities serving facilities occupied by DPSCD or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated:

1. Notify DPSCD’s Representative not less than 72 hours in advance of proposed utility interruptions.

2. Do not proceed with utility interruptions without DPSCD’s written permission.

B. Excavate for and remove underground utilities indicated to be removed.

3.4 CLEARING AND GRUBBING

A. Remove obstructions, trees, shrubs, grass, and other vegetation to permit installation of new construction. Removal includes digging out stumps and obstructions and grubbing roots.

1. Do not remove trees, shrubs, and other vegetation unless authorized by

DPSCD’s Representative.

2. Cut minor roots and branches of trees indicated to remain in a clean and careful manner where such roots and branches obstruct installation of new construction.

3. Completely remove stumps, roots, obstructions, and debris that obstructs excavation for concrete footings. Use only hand methods for grubbing within drip line of remaining trees.

3.5 SITE IMPROVEMENTS

A. Remove existing above - and below-grade improvements as indicated and as necessary to facilitate new construction.

3.6 DISPOSAL

A. Disposal: Remove surplus soil material, unsuitable topsoil, obstructions, concrete footings demolished materials, and waste materials, including trash and debris, and legally dispose of them off DPSCD's property.

END OF SECTION 01 – SITE CLEARING AND DEMOLITION

SECTION 02 - EXCAVATION SUPPORT AND PROTECTION

1.1 GENERAL

A. Existing Utilities: Do not interrupt utilities serving facilities occupied by the

Owner or others unless permitted in writing by the Owner and then only after arranging to provide temporary utility services according to requirements indicated.

PART 2-PRODUCTS (Not Applicable)

PART 3-EXECUTION

3.1 EXECUTION

A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards that could develop during excavation support and protection system operations.

B. Install excavation support and protection systems to ensure minimum interference with roads, streets, walks, and other adjacent occupied and used facilities.

C. Locate excavation support and protection systems clear of permanent construction and to permit forming and finishing of concrete surfaces.

D. Monitor excavation support and protection systems daily during excavation progress and for as long as excavation remains open. Promptly correct bulges, breakage, or other evidence of movement to ensure excavation support and protection systems remain stable.

E. Promptly repair damages to adjacent facilities caused by installing excavation support and protection system.

END OF SECTION 02 – EXCAVATION SUPPORT AND PROTECTION

SECTION 03 - EARTHWORK

PART 1 - GENERAL

1.1 GENERAL SUMMARY

A. This Section includes the following:

1. Grading, excavating, pouring of concrete footings, and backfilling, and turf restoration.

1.2 DEFINITIONS

A. Additional Excavation: Excavation below sub-grade elevations as directed by

DPSCD Representative. Additional excavation and replacement material will be paid for according to Contract provisions for changes in the Work.

B. Bulk Excavation: Excavations more than 10 feet in width and pits more than

30 feet in either length or width.

C. Unauthorized Excavation: Excavation below sub-grade elevations or beyond indicated dimensions without direction by Owner. Unauthorized excavation, as well as remedial work directed by DPSCD Representative, shall be without additional compensation.

D. Grading: The moving and leveling of topsoil and/or sub-grade material to establish a desired slope or level ground for and adjacent to proposed improvements

1.3 QUALITY ASSURANCE

A. Pre-Excavation/Grading Conference: Owner’s Representative to conduct conference at Project site prior to initiating construction.

1.4 PROJECT CONDITIONS

A. Existing Utilities: Do not interrupt utilities serving facilities occupied by

Owner or others unless permitted in writing by Owner.

1. Have utility-locator service mark underground utility locations prior to demolition and excavation. Call Miss Dig and verify all utilities prior to all earthwork.

PART 2 - PRODUCTS

2.1 SOIL MATERIALS

A. General: Provide borrow soil materials when sufficient satisfactory soil materials are not available from excavations and/or grading operations.

B. Backfill and Fill: Satisfactory soil materials.

C. Subbase: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; with at least 90 percent passing a 1-1/2- inch sieve and not more than 12 percent passing a No.

200 sieve.

D. Base: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; with at least 95 percent passing a 1-1/2-inch sieve and not more than 8 percent passing a No.

200 sieve.

E. Engineered Fill: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; with at least

90 percent passing a 1-1/2-inch sieve and not more than 12 percent passing a

No. 200 sieve.

PART 3 - EXECUTION

3.1 PREPARATION

A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earthwork operations.

B. Provide erosion-control measures to prevent erosion or displacement of soils and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways.

3.2 DEWATERING

A. Prevent surface water and ground water from entering excavations, from ponding on prepared subgrades, and from flooding Project site and surrounding area.

B. Protect subgrades from softening, undermining, washout, and damage by rain or water accumulation.

1. Reroute surface water runoff away from excavated areas. Do not allow water to accumulate in excavations.

2. Install a dewatering system to keep subgrades dry and convey ground water away from excavations. Maintain until dewatering is no longer required.

3.3 EXPLOSIVES

A. Explosives: Do not use explosives.

3.4 EXCAVATION, GENERAL

A. Classified Excavation: Excavation to sub-grade elevations classified as earth and rock.

1. Earth excavation includes excavating pavements and obstructions visible on surface; underground structures, utilities, and other items indicated to be removed; together with soil, boulders, and other materials not classified as rock or unauthorized excavation.

a. Intermittent drilling; ram hammering; or ripping of material not classified as rock excavation is earth excavation.

2. Rock excavation includes removal and disposal of rock.

3.5 EXCAVATION FOR STRUCTURES

A. Excavate to indicated elevations and dimensions within a tolerance of plus or minus 1 inch. Extend excavations a sufficient distance from structures for placing and removing concrete formwork, for installing services and other construction, and for inspections.

3.6 APPROVAL OF SUBGRADE

A. Notify Owner’s Representative when excavations have reached required depths and widths. Do not proceed with pouring concrete footings until excavations have been inspected and approved by Owner’s Representative.

B. If Owner determines that unsatisfactory soil is present, continue excavation and replace with compacted backfill or fill material as directed.

1. Additional excavation and replacement material will be paid for according to Contract provisions for changes in the Work.

C. Reconstruct subgrades damaged by freezing temperatures, frost, rain, accumulated water, or construction activities, as directed by Owner’s

Representative.

3.7 UNAUTHORIZED EXCAVATION

A. Fill unauthorized excavation under foundations or wall footings by extending bottom elevation of concrete foundation or footing to excavation bottom, without altering top elevation. Lean concrete fill may be used when approved by Owner’s Representative.

1. Fill unauthorized excavations under other construction directed by

Owner’s Representative.

3.8 STORAGE OF SOIL MATERIALS

A. Stockpile borrow materials and satisfactory excavated soil materials. Stockpile soil materials without intermixing. Place, grade, and shape stockpiles to drain surface water. Cover to prevent windblown dust.

1. Stockpile soil materials away from edge of excavations. Do not store within drip line of remaining trees.

3.9 BACKFILL

A. Place and compact backfill in excavations promptly, but not before completing the following:

1. Surveying locations of underground utilities for record documents.

2. Removing trash and debris.

3.10 FILL

A. Preparation: Remove vegetation, topsoil, debris, unsatisfactory soil materials, obstructions, and deleterious materials from ground surface before placing fills.

B. Grade, scarify, bench, or break up sloped surfaces steeper than 1 vertical to 4 horizontal so fill material will bond with existing material.

C. Place and compact fill material in layers to required elevations as follows:

1. Under grass and planted areas, use satisfactory soil material.

2. Under walks and pavements, use satisfactory soil material.

3. Under building slabs, use engineered fill.

4. Under footings and foundations, use engineered fill.

3.11 MOISTURE CONTROL

A. Uniformly moisten or aerate subgrade and each subsequent fill or backfill layer before compaction to within 2 percent of optimum moisture content.

1. Do not place backfill or fill material on surfaces that are muddy, frozen, or contain frost or ice.

2. Remove and replace, or scarify and air-dry, otherwise satisfactory soil material that exceeds optimum moisture content by 2 percent and is too wet to compact to specified dry unit weight.

3.12 COMPACTION OF BACKFILLS AND FILLS

A. Place backfill and fill materials in layers not more than 8 inches in loose depth for material compacted by heavy compaction equipment, and not more than 4 inches in loose depth for material compacted by hand-operated tampers.

B. Place backfill and fill materials evenly on all sides of structures to required elevations, and uniformly along the full length of each structure.

C. Compact soil to not less than the following percentages of maximum dry unit weight according to ASTM D 1557.

D. Compact soil to not less than the following percentages of maximum dry unit weight according to ASTM D 698:

1. Under pavements, scarify and recompact top 12 inches of existing subgrade and each layer of backfill or fill material at 95 percent.

2. Under walkways, scarify and recompact top 6 inches below subgrade and compact each layer of backfill or fill material at 95 percent.

3. Under lawn or unpaved areas, scarify and recompact top 6 inches below subgrade and compact each layer of backfill or fill material at 85 percent.

3.13 GRADING

A. General: Uniformly grade areas to a smooth surface, free from irregular surface changes. Comply with compaction requirements and grade to cross sections, lines, and elevations indicated.

1. Provide a smooth transition between adjacent existing grades and new grades.

2. Cut out soft spots, fill low spots, and trim high spots to comply with required surface tolerances.

B. Site Grading: Slope grades to direct water away from buildings and to prevent ponding. Finish sub-grades to required elevations within the following tolerances:

1. Lawn or Unpaved Areas: Plus or minus 1 inch.

2. Walks: Plus or minus 1 inch.

3. Pavements: Plus or minus 1/2 inch.

3.14 PROTECTION

A. Protecting Graded Areas: Protect newly graded areas from traffic, freezing, and erosion. Keep free of trash and debris.

B. Repair and reestablish grades to specified tolerances where completed or partially completed surfaces become eroded, rutted, settled, or where they lose compaction due to subsequent construction operations or weather conditions.

1. Scarify or remove and replace soil material to depth as directed by the

Owner’s Representative; reshape and recompact.

C. Where settling occurs before Project correction period elapses, remove finished surfacing, backfill with additional soil material, compact, and reconstruct surfacing.

1. Restore appearance, quality, and condition of finished surfacing to match adjacent work, and eliminate evidence of restoration to the greatest extent possible.

3.15 DISPOSAL OF SURPLUS AND WASTE MATERIALS

A. Disposal: All surplus materials shall be removed and disposed of by Contractor.

1. Remove waste material, including unsatisfactory soil, trash, and debris, and legally dispose of it off Owner's property.

END OF SECTION 03 EARTHWORK -

SECTION 04 – PORTLAND CONCRETE

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

1.2 GENERAL SUMMARY

1. This Section relates to the requirements for concrete footings for fence and gate posts.

1.3 DEFINITIONS

A. Cementitious Materials: Portland cement alone or in combination with one or more of blended hydraulic cement, expansive hydraulic cement, fly ash and other pozzolans, ground granulated blast-furnace slag, and silica fume.

1.4 SUBMITTALS

A. Product Data: For each type of manufactured material and product indicated.

B. Design Mixes: For each concrete mix. Include alternate mix designs when characteristics of materials, project conditions, weather, test results, or other circumstances warrant adjustments.

C. Material Test Reports: From a qualified testing agency indicating and interpreting test results for compliance of the following with requirements indicated, based on comprehensive testing of current materials:

1. Cementitious materials and aggregates.

2. Steel reinforcement and reinforcement accessories.

3. Admixtures.

4. Bonding agent or adhesive.

5. Joint fillers.

1.5 QUALITY ASSURANCE

A. Installer Qualifications: An experienced installer who has completed concrete work similar in material, design, and extent to that indicated for this Project and whose work has resulted in construction with a record of successful in-service performance.

B. Manufacturer Qualifications: Manufacturer of ready-mixed concrete products complying with ASTM C 94 requirements for production facilities and equipment.

1. Manufacturer must be certified according to the National Ready Mix

Concrete Association's Plant Certification Program.

C. Contractor must give Owner’s Representative 24 hour notice of footing excavation. Pouring of concrete footings shall not be permitted unless Owner’s

Representative inspects and authorizes pour.

1.6 PROJECT CONDITIONS

A. Traffic Control: Maintain access for vehicular and pedestrian traffic as required for other construction activities.

PART 2 - PRODUCTS

2.1 CONCRETE MATERIALS

A. General: Use the same brand and type of cementitious material from the same manufacturer throughout the Project.

B. Portland Cement: ASTM C 150, Type I or II.

1. Fly Ash: ASTM C 618, Class F or C.

C. Aggregate: ASTM C 33, uniformly graded, from a single source, with coarse aggregate as follows:

1. Class: 4S.

2. Class: 4M.

3. Class: 1N.

4. Maximum Aggregate Size: 1-1/2 inches nominal.

5. Maximum Aggregate Size: 1 inch nominal.

6. Maximum Aggregate Size: 3/4 inch nominal.

7. Do not use fine or coarse aggregates containing substances that cause spalling.

D. Water: ASTM C 94.

2.2 ADMIXTURES

A. General: Admixtures certified by manufacturer to contain not more than 0.1 percent water-soluble chloride ions by mass of cement and to be compatible with other admixtures.

2.3 CURING MATERIALS

A. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf, weighing approximately 9 oz./sq. yd. dry.

B. Water: Potable.

C. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, the following:

2.4 CONCRETE MIXES

A. Prepare design mixes, proportioned according to ACI 211.1 and ACI 301, for each type and strength of normal-weight concrete determined by either laboratory trial mixes or field experience.

B. Proportion mixes to provide concrete with the following properties:

1. Compressive Strength (28 Days): 4000 psi.

2. Maximum Water-Cementitious Materials Ratio: 0.50.

3. Slump Limit: 4 inches.

C. Cementitious Materials: Limit percentage, by weight, of cementitious materials other than Portland cement in concrete as follows:

1. Fly Ash: 25 percent.

2. Combined Fly Ash and Pozzolan: 25 percent.

2.5 CONCRETE MIXING

A. Ready-Mixed Concrete: Comply with requirements and with ASTM C 94.

PART 3 - EXECUTION

3.1 PREPARATION

A. Remove loose material from compacted subbase surface immediately before placing concrete.

3.2 CONCRETE PLACEMENT

A. Inspection: Before placing concrete notify other trades to permit installation of their work.

B. Remove snow, ice, or frost from subbase surface and reinforcement before placing concrete. Do not place concrete on frozen surfaces.

C. Moisten subbase to provide a uniform dampened condition at the time concrete is placed. Do not place concrete around manholes or other structures until they are at the required finish elevation and alignment.

D. Comply with requirements and with recommendations in ACI 304R for measuring, mixing, transporting, and placing concrete.

E. Do not add water to concrete during delivery, at Project site, or during placement.

F. Deposit and spread concrete in a continuous operation between transverse joints.

Do not push or drag concrete into place or use vibrators to move concrete into place.

G. Consolidate concrete by mechanical vibrating equipment supplemented by hand-spading, rodding, or tamping. Use equipment and procedures to consolidate concrete according to recommendations in ACI 309R.

H. Cold-Weather Placement: Comply with ACI 306.1 and as follows. Protect concrete work from physical damage or reduced strength that could be caused by frost, freezing actions, or low temperatures.

1. When air temperature has fallen to or is expected to fall below 40 deg F, uniformly heat water and aggregates before mixing to obtain a concrete mixture temperature of not less than 50 deg F and not more than 80 deg

F at point of placement.

2. Do not use frozen materials or materials containing ice or snow.

3. Do not use calcium chloride, salt, or other materials containing antifreeze agents or chemical accelerators, unless otherwise specified and approved in mix designs.

I. Hot-Weather Placement: Place concrete according to recommendations in ACI

305R and as follows when hot-weather conditions exist:

1. Cool ingredients before mixing to maintain concrete temperature at time of placement below 90 deg F. Chilled mixing water or chopped ice may be used to control temperature, provided water equivalent of ice is calculated to total amount of mixing water. Using liquid nitrogen to cool concrete is Contractor's option.

3.3 CONCRETE PROTECTION AND CURING

A. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. Comply with ACI 306.1 for cold-weather protection and follow recommendations in ACI 305R for hot-weather protection during curing.

B. Begin curing after finishing concrete, but not before free water has disappeared from concrete surface.

3.4 PAVEMENT TOLERANCES

A. Comply with tolerances of ACI 117 and as follows:

1. Elevation: 1/4 inch.

2. Thickness: Plus 3/8 inch, minus 1/4 inch.

3.5 FIELD QUALITY CONTROL

3.6 REPAIRS AND PROTECTION

A. Remove and replace concrete pavement that is broken, damaged, or defective, or does not meet requirements in this Section.

B. Protect concrete from damage.

END OF SECTION 04 – PORTLAND CONCRETE

SECTION 05 - CHAIN-LINK FENCES AND GATES

PART 2 - GENERAL

2.1 SUMMARY

A. This Section includes the following:

1. Galvanized steel chain-link fabric.

2. Galvanized steel framework.

3. Pipe gate and keeper.

4. Gate Operator

B. Related Sections include the following:

1. Section 02751 PORTLAND CEMENT CONCRETE for concrete footings.

2.2 DEFINITIONS

A. CLFMI: Chain Link Fence Manufacturers Institute.

2.3 SUBMITTALS

A. Product Data: Material descriptions, construction details, dimensions of individual components and profiles, and finishes for the following:

1. Fence and gate posts, rails, and fittings.

2. Chain-link fabric, reinforcements, and attachments.

3. Gates and hardware.

4. Gate Operator

B. Shop Drawings: Show locations of fence, each gate, posts, rails, and tension wires and details of extended posts, extension arms, gate swing, or other operation, hardware and accessories. Indicate materials, dimensions, sizes, weights, and finishes of components. Include plans, elevations, sections, gate swing and other required installation and operational clearances, and details of post anchorage and attachment and bracing.

C. Maintenance Data: For gate operator.

D. Operators Manual: For Gate Operator

E. Safety Literature: For Gate Operator

2.4 QUALITY ASSURANCE

A. Installer Qualifications: An experienced installer who has completed chain-link fences and gates similar in scale, material, design, and extent to that indicated herein and whose work has resulted in construction with a record of successful in-service performance. Must have outstanding work history with Detroit Public

Schools and other School Districts, and/or Local Government Agency.

B. Source Limitations for Chain-Link Fences and Gates: Obtain each color, grade, finish, type, and variety of component for chain-link fences and gates from sources with resources to provide chain-link fences and gates of consistent quality in appearance and physical properties.

2.5 WARRANTIES

A. Gate Operator

1. Gate operators shall be warranted by the contractor for a period of two years from date of final acceptance by DPSCD against defects in materials or workmanship. Defective parts shall be repaired or replaced at no additional charge to DPSCD.

2. All accessories shall be warranted by the contractor for a period of two years from date of installation against defects in materials or workmanship.

Defective parts shall be repaired or replaced at no additional charge to the

DPSCD. All gate openers shall be of the highest level industrial quality to withstand the rigors of constant use

2.6 PROJECT CONDITIONS

A. Field Measurements: Contractors are required to verify layout information for chain-link fences and gates prior to fabrication and installation. Contractors are to verify plan dimensions and/or measures detailed on purchase orders by performing actual field measurements for each site. Any discrepancies found between the quantities identified on a purchase order and the measurements taken in the field shall be reported to the DPSCDs Representative prior to proceeding with the work.

PART 3 - PRODUCTS

3.1 CHAIN-LINK FENCE FABRIC

A. Steel Chain-Link Fence Fabric: Height indicated on Drawings. Provide fabric fabricated in one-piece widths for fencing in height of 12 feet (3.6 m) and less.

Comply with CLFMI's "Product Manual" and with requirements indicated below:

1. Mesh and Wire Size: 1-inch (25-mm) mesh, 0.148-inch (3.76-mm) diameter (9 gage), to be used for all fences and enclosures around mechanical electrical equipment, and where directed by DPSCD’s

Representative.

2. Mesh and Wire Size: 2-inch (50-mm) mesh, 0.148-inch (3.76-mm) diameter (9 gage), to be used where directed by DPSCD’s Representative.

3. Zinc-Coated Fabric: ASTM A 392, with zinc coating applied to steel wire mesh fabric after weaving with the following minimum coating weight:

a. Class 1: Not less than the standard 1.2 oz./sq. ft. (610 g/sq. m) of uncoated wire surface.

B. Selvage: Knuckled at both selvages for all fence heights.

3.2 FENCE FRAMING

A. Round Steel Pipe: Standard weight, Schedule 40, galvanized steel pipe complying with ASTM F 1083. Comply with ASTM F 1043, Material Design

Group IA, external and internal coating Type A, consisting of not less than 1. 8-oz./sq. ft. (0.55-kg/sq. m) zinc; and the following strength and stiffness requirements:

B. Posts and other appurtenances used in the construction of chain link fences shall be Schedule 40 shall be hot dipped galvanized, conforming with ASTM A120 standard weight, except the hydrostatic testing requirement is waived. Minimum yield strength is to be 25,800 psi. Zinc coating shall be inside and out with an average weight of not less than 1.8 ounces per square foot of coated surface.

C. Intermediate Posts

1. Fabric 10 feet and under

a. Schedule 40: 2.375-inch o.d. with .154-inch wall thickness, 3.65 lbs.

per foot.

2. Fabric over 10 feet high

a. Schedule 40: 2.875-inch o.d. with .203-inch wall thickness, 5.79 lbs.

per foot.

D. D. End, Corner, and Pull Posts

1. General

a. "End Post" will be used to refer to terminal posts.

b. "Corner Post" will be installed where all changes in direction occur in the fence line of 30 degrees or more.

c. "Pull Post" shall be installed at all abrupt changes in grade or at locations directed by the DPSCD’s Representative with a maximum spacing between pull posts not to exceed 500 feet.

2. Fabric 10 feet and under

a. Schedule 40: 2.875-inch o.d. with .203-inch wall thickness, 5.79 lbs.

per foot.

3. Fabric over 10 feet high

a. Schedule 40: 4.0-inch o.d. with .226-inch wall thickness, 9.11 lbs.

per foot.

E. Gate posts shall conform to the following sizes for single swing gates or one leaf of double gates:

1. Gate leaf up to 6 feet wide

a. Schedule 40: 2.875-inch o.d. with .203-inch wall, 5.79 lbs. per lineal foot.

2. Gate leaf over 6 to 13 feet wide

a. Schedule 40: 4-inch o.d. with .226-inch wall, 9.10 lbs. per foot.

3. Gate leaf over 13 to 18 feet wide

a. Schedule 40: 6.625-inch o.d. with .280-inch wall, 18.97 lbs. per foot.

4. Gate leaf over 18 feet wide

a. Schedule 40: 8.625-inch o.d. with .322 inch wall, 28.55 lbs. per foot.

5. Gate posts shall be equipped with tops so designed to exclude moisture from the post.

F. Post Spacing: Posts shall be evenly spaced at intervals not to exceed 10 feet when measured from center between posts. In general, post spacing measurements will be parallel to the slope of the natural ground.

G. Top Rails: Fabricate top rail from schedule 40 (0.140 wall, 2.28 lbs. per lineal foot; lengths 21 feet (6.4 m) or longer with wedged-end or fabricated for expansion-type coupling, forming a continuous rail along top of chain-link fabric.

3.3 TENSION WIRE

A. General: Provide horizontal tension wire extended along bottom of existing fence fabric. Tension wire only to be used when repairing existing fence that possesses tension wire. All new and/or total replacement installations are to be constructed with bottom rail unless authorized otherwise by the DPSCD’s

Representative.

B. Metallic-Coated Steel Wire: 0.177-inch- (4.5-mm-) diameter, tension wire complying with ASTM A 824 and the following:

1. Coating: Type II, zinc coated (galvanized) by the hot-dip process, or by the electrolytic process, with the following minimum coating weight:

a. Class 3: Not less than 1.2 oz./sq. ft. (610 g/sq. m) of uncoated wire surface.

3.4 SWING GATES

A. General: Comply with ASTM F 900 for the following swing-gate types:

1. Single gate.

2. Double gate.

B. Metal Pipe: Galvanized steel pipe; Outside frame shall be Schedule 40 constructed using a minimum 2” O.D. vertical frame members and a minimum of

1 5/8” O.D. horizontal members. Comply with ASTM F 1083 and ASTM F 1043 for materials and protective coatings.

C. Frames and Bracing: Fabricate members from round galvanized steel pipe with outside dimension and weight according to ASTM F 900 for the following gate fabric height:

1. Gate Fabric Height: 6 feet (1.83 m) or less.

2. Gate Fabric Height: More than 6 feet (1.83 m).

D. Frame Corner Construction: As follows:

1. Welded or assembled with corner fittings and 5/16-inch- (7.9-mm-) diameter, adjustable truss rods for panels 5 feet (1.52 m) wide or wider.

E. Gate Posts: Fabricate members from round galvanized steel pipe with outside dimension and weight according to ASTM F 900.

F. Hardware: Gate Hardware: Hinges, latches, and other moving hardware shall be genuine malleable iron. Provide the following hardware and accessories for each gate:

1. Hinges: Shall be adequate strength for gate, and with large bearing surfaces for clamping in position. The hinges shall not turn or twist under that action of the gate. The gates shall be capable of being opened and closed easily by one person. Hinges will be designed with off-set arms to permit a 180-degree swing. Provide one pair hinges for each gate leaf.

2. Latch: Shall have a padlock eye or provision for padlocking (one padlock for locking both gate leaves), and shall permit single gate to swing only in one direction. Latches shall be forked-type for single gates and forked-type plunger bar for double gates to permit operation from both sides of gate.

The plunger rod shall be a minimum 1-3/8 inch o.d. The center of the latch is to be 3 feet above grade.

3. Stops: Center stops for double gates shall consist of a device arranged to be set in concrete and to engage the plunger bar of the latch. Stop is to be a mushroom type or flush plate with anchors.

4. Keeper: Provide keepers for each gate leaf over 5 feet wide which shall consist of a mechanical device for securing the free end of the gate when in a full open position. All vehicle or drive gates shall be equipped with

"semi-automatic" outer catches to secure gate in open position

(automatically holds gate in the open position until manually released).

3.5 HORIZONTAL (CANTELEVERED) SLIDE GATES

A. General: Comply with ASTM F 1184 for the following slide-gate types:

1. Single gate.

B. Metal Pipe to be galvanized steel. Comply with ASTM F 1083 and

ASTM F 1043 for materials and protective coatings.

1. Gate Fabric Height by Opening Width: All fabric heights by over 4 feet

(1.22 m).

2. Frame and Bracing: Fabricate from round, galvanized steel pipe with outside dimension and weight according to ASTM 1184 for the following gate characteristics: Outside frame shall be constructed of schedule 40 galvanized pipe using a minimum of 2-1/2” O.D. horizontal frame members and a minimum of 2” O.D. vertical frame members.

C. Gate Posts: Fabricate members from round galvanized steel pipe with outside dimension and minimum weight according to ASTM F 1184 for the following gate characteristics:

1. Type II Gate Opening Width: Over 12 feet (3.7 m) but not over 30 feet (9.1 m).

D. Hardware: Latches permitting operation from both sides of gate, and stops fabricated from galvanized steel. Fabricate latches with integral eye openings for padlocking; padlock accessible from both sides of gate.

3.6 FITTINGS

A. General: Provide fittings for a complete fence installation, including special fittings for corners. Comply with ASTM F 626.

B. Post and Line Caps: [Hot-dip galvanized pressed steel or hot-dip galvanized cast iron] [Mill-finished aluminum]. Provide weather-tight semi-steel dome closure cap for each post.

C. Rail and Brace Ends: Hot-dip galvanized pressed steel or hot-dip galvanized cast iron. Provide rail ends or other means for attaching rails securely to each gate, corner, pull, and end post.

D. Rail Fittings: Provide the following:

1. Top Rail Sleeves: Hot-dip galvanized pressed steel or round steel pipe.

Not less than 6 inches (153 mm) long.

2. Rail Clamps: Hot-dip galvanized pressed steel. Provide line and corner boulevard clamps for connecting intermediate and bottom rails in the fence line to line posts.

E. Tension and Brace Bands: Hot-dip galvanized pressed steel.

F. Tension Bars: Hot-dip galvanized steel, length not less than 2 inches (50 mm) shorter than full height of chain-link fabric. Provide one bar for each gate and end post, and two for each corner and pull post, unless fabric is integrally woven into post.

G. Truss Rod Assemblies: Hot-dip galvanized steel rod and turnbuckle or other means of adjustment.

H. Tie Wires, Clips, and Fasteners: Provide the following types according to

ASTM F 626:

1. Standard Round Wire Ties: For attaching chain-link fabric to posts, rails, and frames, complying with the following:

2. Round Wire Hog Rings: Hot-dip galvanized steel or aluminum for attaching chain-link fabric to horizontal tension wires.

3.7 GATE OPERATOR

A. General: Provide factory-assembled automatic gate operation system designed for gate size, type, weight, construction, use, traffic-flow patterns, and operation frequency. Provide operation system for gate specified, of size and capacity and with features, characteristics, and accessories suitable for project conditions, recommended by gate manufacturer complete with electric motor and factory pre-wired motor controls, remote-control stations, control devices, power disconnect switch, obstruction detection device, lockable weatherproof enclosures which protect controls and all operating parts, and accessories required for proper operation. Provide enclosures with corrosion-resistant-protective and decorative finish and two keys per lock. Include wiring from motor controls to motor.

Coordinate operator wiring requirements and electrical characteristics with building electrical system.

1. Provide operator designed so motor may be removed without disturbing limit-switch adjustment and without affecting auxiliary emergency operator.

2. Provide operator with UL approval, including, but not limited to, UL 325.

3. Provide electronic components with built-in troubleshooting diagnostic feature.

4. Provide unit designed and wired for both right-hand/left-hand opening, permitting universal installation.

5. Provide a minimum of 50 remote gate openers

B. Comply with NFPA 70.

C. Control Equipment: Comply with NEMA ICS 1, NEMA ICS 2, and

NEMA ICS 6, with NFPA 70, Class 2 control circuit, maximum 24-V ac or dc.

D. Electromechanical Operation: Size of conduit shall be approved by DPSCD prior to installation. Provide unit designed for pedestal or post mounting; consisting of electric motor and factory-prewired motor controls, starter, speed control device, chain-drive assembly, brake, clutch or torque limiter, and as follows:

1. Enclosed worm gear reducer, roller chain drive with thermostatically controlled strip heater.

2. Enclosed worm gear and chain and sprocket reducers, roller chain drive with thermostatically controlled strip heater.

E. Operation Cycle Requirements: Design gate operator to operate for not less than the following duty and cycles per hour. One cycle equals one gate opening plus one gate closing.

1. Peak Duty: 30– 50 peak cycles per hour at peak periods.

Size and type of operator must be approved by DPSCD before installation.

F. Gate Operation Speed: Minimum 45 fpm (0.229 m/s).

G. Electric Motors: High-starting torque, instant reversing, continuous-duty, insulated electric motors, complying with NEMA MG 1, sized to start and operate size and weight of gate considering project location’s service conditions without exceeding nameplate ratings or considering service factor.

1. Service Factor: According to NEMA MG 1, unless otherwise indicated.

2. Enclosure: Totally enclosed, non-ventilated or fan-cooled motors, fitted with plugged drain.

3. Thermal Protection: Internal manual reset.

4. Motors: Dependant on size of gate and available electrical supply.

½, ¾, or 1 HP, 115, 208, or 230 VAC single phase

½, ¾, or 1 HP, 208, 230, or 460 VAC three phase.

H. Obstruction Detection Devices: Provide each motorized gate with automatic safety sensor(s). Activation of sensor(s) causes operator to immediately function as follows:

1. Action: Reverse gate in both opening and closing cycles and hold until clear of obstruction.

2. Type: Edge contact sensors (2) affixed to the left and right leading edges of the gate and a vehicle detector loop.

I. Limit Switches: Adjustable switches, interlocked with motor controls and set to automatically stop gate at fully retracted and fully extended positions.

J. Emergency Release Mechanism: Quick disconnect release of operator drive system of the following type of mechanism, permitting manual operation if operator fails. Design system so control circuit power is disconnected during manual operation.

1. Type: External lever release, allowing gate to be pushed open without mechanical devices, keys, cranks, or special knowledge.

K. Operating Features: Include the following:

1. Fully Systems Compatible: With controlling circuit board capable of accepting any type of input from external devices.

L. Training: Supply the supply the following:

1. The contractor will review the manufacturer’s supplied DPSCDs information manual and safety literature with the end user, and when finished leave a copy of this information with the end user.

2. The contractor will instruct the end user in the use of the operator, the manual disconnect, and all control devices.

3. The contractor will review maintenance of the operator with the end user, and when finished leave a copy of the maintenance manual with the end user.

2.9 CAST-IN-PLACE CONCRETE

General: Comply with ACI 301 for cast-in-place concrete. See Section 02751

Portland Cement Concrete for requirements on post footings

PART 4 - EXECUTION

4.1 EXAMINATION

A. Examine areas and conditions, with Installer present, for compliance with requirements for site clearing, earthwork, pavement work, and other conditions affecting performance.

1. Do not begin installation before final grading is completed.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

4.2 PREPARATION

A. Stake locations of fence lines, gates, and terminal posts. Indicate locations of utilities, lawn sprinkler system, underground structures, benchmarks, and property monuments.

4.3 INSTALLATION, GENERAL

A. General: Install chain-link fencing to comply with ASTM F 567 and more stringent requirements specified.

1. Install fencing on established boundary lines inside property line.

B. Post Excavation: Auger or hand-excavate holes for posts to diameters and spacing specified herein, in firm, undisturbed, and/or compacted soil.

C. Post Setting: All excavations for posts shall be a minimum of 42” in depth and

12” in width unless posts are to be set in paved surface areas. Protect portion of posts aboveground from concrete splatter. Place concrete around posts and vibrate or tamp for consolidation. Driving posts in paved areas must be authorized by the DPSCD’s Representative. When authorized, posts must be driven to bearing capacity. Driving posts in paved areas must be authorized by the

DPSCD’s Representative. When authorized, posts must be driven to bearing capacity. Verify that posts are set plumb, aligned, and at correct height and spacing, and hold in position during placement and finishing operations until concrete is sufficiently cured.

1. Exposed Concrete Footings: Extend concrete 1 inch (25 mm) above grade, smooth, and shape to shed water.

4.4 CHAIN-LINK FENCE INSTALLATION

A. Terminal Posts: Locate terminal end, corner, and gate posts per ASTM F 567 and terminal pull posts at changes in horizontal or vertical alignment of 15 degrees or more.

B. Line Posts: Space line posts uniformly at 10 feet (2.44 m) o.c.

C. Post Bracing Assemblies: Install according to ASTM F 567, maintaining plumb position and alignment of fencing. Install braces at end and gate posts and at both sides of corner and pull posts. Locate horizontal braces at mid-height of fabric on fences with top rail and at two-thirds fabric height on fences without top rail.

Install so posts are plumb when diagonal rod is under proper tension.

D. Post Caps: All post caps shall be Semi- Steel Dome Caps unless authorized otherwise by the DPSCD’s Representative.

E. Tension Wire: Install according to ASTM F 567, maintaining plumb position and alignment of fencing. Pull wire taut, without sags. Fasten fabric to tension wire with 0.120-inch- (3.05-mm-) diameter hog rings of same material and finish as fabric wire, spaced a maximum of 18 inches (457 mm) o.c. Install tension wire in locations indicated before stretching fabric. NOTE: Tension Wires are only to be used on the repair of fencing that has tension wire. All new and replacement fencing shall be installed with bottom rail.

1. Bottom Tension Wire: Install tension wire within 4 inches (101 mm) from bottom of fabric and tie to each post with not less than same gage and type of wire.

F. Top Rail: Install according to ASTM F 567, maintaining plumb position and alignment of fencing. Top Rail shall run continuously and tie into Press Steel –

Brace Rail Ends. Run rail continuously, bending to radius for curved runs and terminating into rail end attached to posts or post caps fabricated to receive rail at terminal posts. Provide expansion couplings as recommended by fencing manufacturer. Loop caps shall only be used on repair and/or restoration projects that they are currently exist.

G. Intermediate Rails: Install in one piece at post-height center span, spanning between posts, using fittings, special offset fittings, and accessories.

H. Bottom Rail: Install spanning between posts using fittings and fasteners as required. Bottom rails shall tie into Brace Rail Ends at terminal, gate, and pull post locations.

I. Chain-Link Fabric: Apply fabric to outside of enclosing framework. Leave 1 inch (25.4 mm) between finish grade or surface and bottom selvage, unless otherwise indicated. Pull fabric taut and tie to posts, rails, tension wires and/or bottom rails. Anchor to framework so fabric remains under tension after pulling force is released.

J. Tension or Stretcher Bars: Thread through fabric and secure to end, corner, pull, and gate posts with tension bands spaced not more than 15 inches (380 mm) o.c.

K. Tie Wires: Use wire of proper length to firmly secure fabric to line posts and rails.