02 41 00.pdf

Pike Island LD, River Wall Crack Stabilization

SECTION TABLE OF CONTENTS

DIVISION 02 - EXISTING CONDITIONS

SECTION 02 41 00

DEMOLITION

PART 1 GENERAL

1.1 REFERENCES

1.2 PROJECT DESCRIPTION

1.2.1 General Requirements

1.3 ITEMS TO REMAIN IN PLACE

1.3.1 Existing Construction Limits and Protection

1.3.2 Utility Service

1.3.3 Facilities

1.4 BURNING

1.5 SUBMITTALS

1.6 QUALITY ASSURANCE

1.6.1 Dust and Debris Control

1.7 PROTECTION

1.7.1 Protection of Personnel

1.8 RELOCATIONS

1.9 EXISTING CONDITIONS

PART 2 PRODUCTS

PART 3 EXECUTION

3.1 REMOVAL OF MISCELLANEOUS CONCRETE

3.1.1 Equipment

3.1.1.1 Concrete Breaker

3.1.2 General

3.1.2.1 Perimeter Saw Cut

3.1.2.2 Preliminary Surface Cleaning

3.1.2.3 Shallow Repairs

3.1.3 Cutting

3.1.3.1 General

3.1.3.2 Diamond-Blade Cutting

3.1.3.3 Diamond-Wire Cutting

3.1.3.4 Stitch Drilling

3.1.4 Impacting

3.1.4.1 Hand-Held Breaker

3.2 EXISTING FACILITIES TO BE REMOVED

3.2.1 Utilities and Related Equipment

3.2.1.1 General Requirements

3.2.1.2 Disconnecting Existing Utilities

3.2.2 Concrete

3.2.3 Patching

3.3 DISPOSITION OF MATERIAL

3.3.1 Title to Materials

3.3.2 Salvaged Materials and Equipment

SECTION 02 41 00 Page 1 CERTIFIED FINAL DOCUMENTS - W911WN20B8008 - Amendment 0002

3.3.3 Unsalvageable and Non-Recyclable Material

3.4 CLEANUP

3.5 DISPOSAL OF REMOVED MATERIALS

3.5.1 Regulation of Removed Materials

3.5.2 Removal from Government Property

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SECTION 02 41 00 Page 2

SECTION 02 41 00

DEMOLITION

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN SOCIETY OF SAFETY ENGINEERS (ASSE/SAFE)

ASSE/SAFE A10.6 (2006) Safety Requirements for Demolition Operations

CONCRETE SAWING AND DRILLING ASSOCIATION (CSDA)

CSDA-W-104 (1998) Track-Mounted Wall Sawing

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2014) Safety and Health Requirements Manual

1.2 PROJECT DESCRIPTION

1.2.1 General Requirements

Do not begin demolition until authorization is received from the Contracting Officer. Remove rubbish and debris from within the cable, pipe and combination trenches; do not allow accumulations. The work includes demolition, salvage of identified items and materials, and removal of resulting rubbish and debris. Remove rubbish and debris from Government property daily, unless otherwise directed. Store materials that cannot be removed daily in areas specified by the Contracting Officer. In the interest of occupational safety and health, perform the work in accordance with EM 385-1-1 , Section 23, Demolition, and other applicable Sections.

1.3 ITEMS TO REMAIN IN PLACE

Take necessary precautions to avoid damage to existing items to remain in place, to be reused, or to remain the property of the Government. Repair or replace damaged items as approved by the Contracting Officer.

Coordinate the work of this section with all other work indicated.

Construct and maintain shoring, bracing, and supports as required. Ensure that structural elements are not overloaded. Increase structural supports or add new supports as may be required as a result of any cutting, removal, deconstruction, or demolition work performed under this contract. Do not overload structural elements. Repairs, reinforcement, or structural replacement require approval by the Contracting Officer prior to performing such work.

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1.3.1 Existing Construction Limits and Protection

Do not disturb existing construction beyond the extent indicated or necessary for installation of new construction. Provide protective measures to control accumulation and migration of dust and dirt in all work areas. Remove dust, dirt, and debris from work areas daily.

1.3.2 Utility Service

Maintain existing utilities indicated to stay in service and protect against damage during demolition and deconstruction operations.

1.3.3 Facilities

Protect electrical and mechanical services and utilities. Where removal of existing concrete is specified or indicated, provide approved barricades, temporary covering of exposed areas, and temporary services or connections for electrical and mechanical utilities.

1.4 BURNING

The use of burning at the project site for the disposal of refuse and debris will not be permitted.

1.5 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Demolition Plan; G , RO Existing Conditions

1.6 QUALITY ASSURANCE

Comply with federal, state, and local hauling and disposal regulations.

In addition to the requirements of Section 00 70 00 CONDITIONS OF THE CONTRACT, FAR 52.236-13 Accident Prevention, conform to the safety requirements contained in ASSE/SAFE A10.6 . Comply with the Environmental Protection Agency requirements specified.

1.6.1 Dust and Debris Control

Prevent the spread of dust and debris and avoid the creation of a nuisance or hazard in the surrounding area. Do not use water if it results in hazardous or objectionable conditions such as, but not limited to, ice, flooding, or pollution.

1.7 PROTECTION

1.7.1 Protection of Personnel

Before, during and after the demolition continuously evaluate the condition of the structure being demolished and take immediate action to protect all personnel working in and around the project site.

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1.8 RELOCATIONS

Perform the removal and reinstallation of relocated items as indicated with workmen skilled in the trades involved. Repair or replace items to be relocated which are damaged by the Contractor with new undamaged items as approved by the Contracting Officer.

1.9 EXISTING CONDITIONS

Before beginning any demolition work, survey the site and examine the drawings and specifications to determine the extent of the work. Record existing conditions in the presence of the Contracting Officer showing the condition of structures and other facilities adjacent to areas of alteration or removal. Photographs sized 4 inch will be acceptable as a record of existing conditions. Include in the record the location and extent of existing cracks and other damage and description of surface conditions that exist prior to starting work. It is the Contractor's responsibility to verify and document all required outages which will be required during the course of work, and to note these outages on the record document. Submit survey results.

PART 2 PRODUCTS

NOT APPLICABLE

PART 3 EXECUTION

3.1 REMOVAL OF MISCELLANEOUS CONCRETE

Removal of concrete for modification of the top of the River Wall monoliths for the crack stabilization measures

3.1.1 Equipment

Assemble at the site of the work sufficient equipment that is dependable, appropriate and adequate to accomplish the work specified. Deliver the equipment a sufficient time before the start of repairs to permit thorough inspection, calibration of weighing and measuring devices, adjustment of parts, and the making of any repairs that may be required. Machines, tools, and equipment used in the performance of the work shall be approved before the work is started and shall be maintained in satisfactory condition at all times. Maintain the equipment in good working condition. Provide dust suppression on equipment as needed to comply with Section 01 57 19.00 08 ENVIRONMENTAL PROTECTION.

3.1.1.1 Concrete Hand-Held Breaker

Use 30 pound breaker for removal of concrete above reinforcing steel. Use 15 pound chipping hammer to remove concrete around reinforcing steel. The contractor will be permitted to use up to 30 pound breakers for removal of concrete on wall faces for placement of anchors recesses. Use 15 pound chipping hammers to remove concrete around reinforcing steel and wall armor.

The contractor will be permitted to use up to 300 pound breakers for removal of concrete on top of the lock walls.

The Contractor will be permitted to place equipment on the lock walls as

SECTION 02 41 00 Page 5 approved by the Contracting Officer. Prepare a work plan for placement of equipment on the lock walls for approval of the Contracting Officer. The work plan shall identify equipment and materials to be placed on the walls, including the associated weights of those components. Submit the computations for all equipment weighing over 2000 pounds, along with a drawing detailing the location(s) for the placement of this equipment on the wall, to ensure the existing concrete surface finishes, the existing galleries, or other lock features are not damaged from equipment. Design and install steel cover plates over the existing grating to carry any loading across the span of the opening. Computations and drawings shall be submitted by the Contractor for the cover plates, detailing size, and location requirements that are required."

3.1.2 General

Prepare a Demolition Plan and submit proposed demolition, salvage, and removal procedures for approval before work is started. Include in the plan procedures for careful removal and disposition of materials specified to be salvaged, coordination with other work in progress a detailed description of methods and equipment to be used for each operation and of the sequence of operations. Provide procedures for safe conduct of the work in accordance with EM 385-1-1 . Plan shall be approved by Contracting Officer prior to work beginning.

Prepare a demolition plan describing the methods and equipment to be used to remove existing concrete. Remove the existing concrete in the area to be repaired or modified to the minimum depth indicated with an allowable tolerance of 1 inch and to such additional depth where necessary to expose a surface of sound, unweathered concrete that is uncontaminated by oils, greases, or deicing salts or solutions. The actual depth of removal shall be subject to approval by the Contracting Officer. Remove concrete with care to avoid damage to adjacent structures and concrete that is not to be repaired under this contract and embedded metal that is not to be removed. Repair any such damage at no additional cost to the Government.

Mark on the surface the limits of concrete removal for approval by the Contracting Officer prior to any removal. When encountering miscellaneous metals during demolition efforts, do not remove metal and other embedded items exposed during the concrete removal operations without authorization of the Contracting Officer. Unless otherwise indicated, continue removal using appropriate equipment to remove unsound concrete and to eliminate any offsets in the area to be repaired which would cause an abrupt change in thickness of the repair and to remove protrusions between holes.

Variations in the final prepared surface shall not exceed the nominal maximum size aggregate of the repair material, except for relatively thin repairs in which case the variation shall not exceed 25 percent of the repair thickness. Any removal beyond the limits shown on the drawings shall be approved by the Contracting Officer prior to performing the additional removal. All equipment and removal methods shall comply with applicable sections of EM 385-1-1 .

3.1.2.1 Perimeter Saw Cut

Make a perpendicular saw cut at least 2 inches deep, but no deeper than the reinforcing steel, to delineate the perimeter of the repair area and avoid feather edges. The perimeter saw cut shall have no angles less than 90 degrees. Exercised care not to cut through existing steel reinforcement or embedded metal that is not to be removed. Omit

SECTION 02 41 00 Page 6 saw-cutting where prohibited by existing metal or other items which are not to be removed. Perform sawing in accordance with CSDA-W-104, except as specified herein. Edges of repaired areas which are not mechanically anchored shall be dove-tailed. Where concrete is being removed from a vertical face by mechanical presplitting, or expansive agents, sawcut the bottom limit of the removal area to the full depth of the removal.

3.1.2.2 Preliminary Surface Cleaning

Clean concrete surfaces that are contaminated with oil, grease or dirt prior to beginning concrete removal in the area. Use detergents, proprietary cleaners formulated for removal of contaminants from concrete, or steam cleaning in accordance with the manufacturer's written instructions. Do not use solvents for removal of oil or grease. All traces of cleaning agents and contaminants shall be removed from the surface.

3.1.2.3 Shallow Repairs

For shallow repairs that do not require reinforcing steel, remove the existing concrete to a minimum depth of 2 inches below the finished surface and to such additional depth where necessary to expose a surface of sound, unweathered concrete that is uncontaminated by oils, greases, or deicing salts or solutions. Remove all loose and deteriorated concrete from the spalled areas indicated.

3.1.3 Cutting

3.1.3.1 General

Use cutting to remove segments of concrete intact or to define the limits of removal by other methods.

3.1.3.2 Diamond-Blade Cutting

Use diamond-blade cutting for cutting through relatively thin sections and defining limits of removal to be performed by other methods. Perform diamond blade cutting using equipment of the correct type and power and with appropriate blade composition for the material being cut. Use a track system for maintaining the alignment of the saw for vertical cuts or where multiple cuts are required for deep cuts. Provide supports as required to support the concrete to be removed. Core drill corners of removal area or use corner saw to avoid overcutting.

3.1.3.3 Diamond-Wire Cutting

Perform diamond wire cutting using equipment of the correct type and power using continuous loop cable with appropriate diamond beads for the material being cut. Core drill holes at corners of removal section to the accuracy required for the wire cutting. Provide supports as required to support the concrete to be removed.

3.1.3.4 Stitch Drilling

Drill overlapping holes of appropriate size along the removal line.

Unless otherwise indicated, drill holes using rotary-percussion or core drilling equipment. Utilize guides as required to maintain alignment.

Provide supports as required to support the concrete to be removed.

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3.1.4 Impacting

Removal of concrete may be accomplished by use of impact-type power tools. Take adequate precautions to prevent impact equipment from vibrating on reinforcing steel. All demolition equipment shall be subject to approval of the Contracting Officer.

3.1.4.1 Hand-Held Breaker

Use hand-held breakers or chipping hammers for removal of concrete in small or restricted areas, where the energy to be applied is limited to prevent damage to adjacent concrete, structures or facilities which are not to be removed, and to complete removal where other methods have been used.

3.2 EXISTING FACILITIES TO BE REMOVED

Dismantled and removed materials are to be separated, set aside, and prepared as specified, and stored or delivered to a collection point for reuse, remanufacture, recycling, or other disposal, as specified.

Materials shall be designated for reuse onsite whenever possible.

3.2.1 Utilities and Related Equipment

3.2.1.1 General Requirements

Do not interrupt existing utilities except when authorized in writing by the Contracting Officer. Do not begin demolition or deconstruction work until all utility disconnections have been made. Shut off and cap utilities as indicated.

3.2.1.2 Disconnecting Existing Utilities

Remove existing utilities as indicated and terminate in a manner conforming to the nationally recognized code covering the specific utility and approved by the Contracting Officer. When utility lines are encountered but are not indicated on the drawings, notify the Contracting Officer prior to further work in that area.

3.2.2 Concrete

Saw concrete along straight lines to a depth of a minimum 2 inch. Make each cut in walls perpendicular to the face and in alignment with the cut in the opposite face. Break out the remainder of the concrete provided that the broken area is concealed in the finished work, and the remaining concrete is sound. At locations where the broken face cannot be concealed, grind smooth or saw cut entirely through the concrete.

3.2.3 Patching

Where removals leave holes and damaged surfaces exposed in the finished work, patch and repair these holes and damaged surfaces to match adjacent finished surfaces, using on-site materials when available. Where new work is to be applied to existing surfaces, perform removals and patching in a manner to produce surfaces suitable for receiving new work. Finished surfaces of patched area shall be flush with the adjacent existing surface and shall match the existing adjacent surface as closely as possible as to texture and finish. Patching shall be as specified and indicated, and shall include:

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a. Concrete and Masonry: Completely fill holes and depressions, left as a result of removals in existing masonry walls to remain, with an approved masonry patching material, applied in accordance with the manufacturer's printed instructions.

3.3 DISPOSITION OF MATERIAL

3.3.1 Title to Materials

Except for materials or equipment scheduled for salvage, all materials and equipment removed and not reused or salvaged, shall become the property of the Contractor and shall be removed from Government property. Title to materials resulting from demolition and deconstruction, and materials and equipment to be removed, is vested in the Contractor upon approval by the Contracting Officer of the Contractor's demolition, deconstruction, and removal procedures, and authorization by the Contracting Officer to begin demolition and deconstruction. The Government will not be responsible for the condition or loss of, or damage to, such property after contract award. Showing for sale or selling materials and equipment on site is prohibited.

3.3.2 Salvaged Materials and Equipment

Remove materials and equipment that are indicated and specified to be removed by the Contractor and that are to remain the property of the Government, and deliver to a storage site, as directed by the Contracting Officer.

a. Salvage items and material to the maximum extent possible.

b. Store all materials salvaged for the Contractor as approved by the Contracting Officer and remove from Government property before completion of the contract. On site sales of salvaged material is prohibited.

Items to be salvaged include:

Checkered plate covers over combination trench and cable and pipe trench are to be removed by the Contractor and remain on site at a location directed by the Contracting Officer.

Air whistle and air whistle piping is to be removed from the existing skid-mounted fiberglass shelter and reinstalled on new control shelter.

3.3.3 Unsalvageable and Non-Recyclable Material

Dispose of unsalvageable and non-recyclable noncombustible material off the site at a properly permitted solid waste disposal facility which is permitted to accept the particular material being disposed.

3.4 CLEANUP

Remove debris and rubbish from basement and similar excavations. Remove and transport the debris in a manner that prevents spillage on streets or adjacent areas. Apply local regulations regarding hauling and disposal.

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3.5 DISPOSAL OF REMOVED MATERIALS

3.5.1 Regulation of Removed Materials

Dispose of debris, rubbish, scrap, and other nonsalvageable materials resulting from removal operations with all applicable federal, state and local regulations as contractually specified. Storage of removed materials on the project site is prohibited.

3.5.2 Removal from Government Property

Transport waste materials removed from demolished and deconstructed structures, except waste soil, from Government property for legal disposal in accordance with Section 01 74 19.00 08 CONSTRUCTION AND DEMOLITION

WASTE MANAGEMENT.

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