ATT_02a_Division_02_Existing_Conditions.pdf

1 Division 02 – Existing Conditions

DIVISION 02 – EXISTING CONDITIONS

SECTION 02070- SELECTIVE DEMOLITION

PART 1 – GENERAL

A. Summary:

1. This Section includes the following:

a. Demolition and removal of selected portions of a building

b. Demolition and removal of selected site elements

c. Patching and repairs

B. Related Sections:

1. Division 3, “Concrete”.

2. Division 5. “Metals”.

3. Division 6, “Woods and Plastics”.

4. Division 7, “Thermal and Moisture Protection”.

5. Division 8, “Doors and Windows”.

6. Division 13, Section “Lightning Protection”.

7. Division 22, “Plumbing”.

8. Division 26, “Electrical”.

9. Division 31, Section “Demolition and Removal”.

10. Division 32, Section “Site Clearing”.

11. Division 31, Section “Earth Moving”.

C. Definitions:

1. Remove: Remove and legally dispose of items except those indicated to be reinstalled, salvaged, or to remain the Government’s property.

2. Remove and Reinstall: Remove items indicated, clean, service, and otherwise prepare them for reuse; store and protect against damage. Reinstall items in the same location or locations indicated.

3. Existing to Remain: Protect construction to remain against damage and soiling during selective demolition. When permitted by the ESD Construction

Representative, items may be removed to a suitable, protected storage location during selective demolition and then cleaned and reinstalled in their original locations.

D. Materials Ownership:

1. Except for items or materials indicated to be reused, salvaged, reinstalled, or otherwise indicated to remain DPW’s property, demolished materials shall become the Contractor’s property and will be removed from the site with further disposition at the Contractor’s option.

E. Submittals:

1. Submittals: Submit in accordance with Division 1 requirements, unless otherwise indicated.

2 Division 02 – Existing Conditions

2. Submit proposed noise-control measures.

3. Schedule of selective demolition activities indicating the following:

Section 02070- Selective Demolition Cont.

a. Detailed sequence of selective demolition and removal Work, with starting and ending dates for each activity.

b. Interruption of utility services.

c. Coordination for shutoff, capping, and continuation of utility services.

d. Detailed sequence of selective demolition and removal Work to ensure uninterrupted progress of Government’s on-site operations, if applicable.

e. Coordination of Government’s continuing occupancy of portions of the

Project site.

4. Recycling receipts for all materials not be landfilled.

5. Landfill dumping receipts indicating type and weight of material landfilled.

6. Record drawings at Project Closeout. Identify and accurately locate all new construction, capped utilities and other subsurface structural, electrical, or mechanical conditions.

7. Landfill records indicating receipt and acceptance of hazardous wastes by a landfill facility licensed to accept hazardous wastes delivered by Contractor and Remediation Subcontractor.

F. Quality Assurance:

1. Demolition Firm Qualifications: When Project scope requires, engage an experienced firm that has successfully completed selective demolition work of similar scope to the indicated for this Project.

2. Regulatory Requirements: Comply with governing EPA notification regulations and DPW/ EMD requirements before starting selective demolition.

Comply with hauling and disposal regulations of AHJ.

G. Project Conditions:

1. Government may occupy portions of the site immediately adjacent to selective demolition area. The Engineer/Project Manager will notify Contractor of this condition and where the condition may exist. Conduct selective demolition so that Government’s operations will not be disrupted. Provide not less than 72 hours’ notice to ESD Construction Representative of activities that will affect

Government’s operations.

2. Government assumes no responsibility for actual condition of buildings to be selectively demolished.

a. Conditions existing at the time of inspection for bidding purpose will be maintained by Government as far as practical.

3. Asbestos and Lead Based Paint: See attached asbestos and LBP survey report for materials expected to be encountered. Submit a Remediation Plan to MICC for forwarding to ESD/EMD for approval. Do not begin abatement Work until the submitted plan is approved by DPW/EMD.

PART 2 – PRODUCTS

3 Division 02 – Existing Conditions

A. Repair Materials:

1. Use repair materials identical to existing materials.

Section 02070- Selective Demolition Cont.

a. Where identical materials are unavailable or cannot be used for exposed surfaces, use materials that visually match existing adjacent surfaces to the fullest extent possible.

b. Use materials whose installed performance equals or surpasses that of existing materials being replaced.

PART 3 – EXECUTION:

A. Examination:

1. Each Contractor and Sub-Contractor will field verify all dimensions and conditions indicated on the drawings that pertain to their trade. The Project

Manager will not determine the “Means & Methods” required to assess the existing conditions or various methods the Tradesmen should use to assess the existing conditions. All and any discrepancies will be brought to the attention of the PM in writing immediately.

2. Verify that utilities have been disconnected and capped.

3. Survey existing conditions and correlate with requirements indicated to determine extent of selective demolition required.

4. When unanticipated mechanical, electrical, or structural elements exist that may conflict with the intended function or design are encountered, investigate and measure the nature and extent of the conflict. Promptly submit a written report to ESD Construction Representative.

5. Survey the condition of the site and building to determine whether moving any element might result in interruption of Government’s operations during demolition.

6. Perform surveys as the Work progresses to detect hazards resulting from selective demolition activities.

B. Utility Services:

1. Maintain existing utilities indicated to remain in service and protect them against damage during selective demolition operations.

a. Do not interrupt existing utilities serving occupied or operating facilities, except when authorized in writing by ESD Construction Representative or other AHJ. Provide temporary service during interruptions to existing utilities, as acceptable to Government.

b. Provide not less than 72 hours’ notice to ESD Construction Representative if shutdown of service is required during changeover.

2. Utility Requirements: Locate, identify, disconnect, and seal or cap off indicated utility services serving building to be selectively demolished.

3. Refer to Divisions 31, 32, and 33 for shutting off, disconnecting, removing, and sealing or capping utility services. Do not start selective demolition until utility disconnecting and sealing have been completed and verified in writing.

4 Division 02 – Existing Conditions

4. Arrange to shut off identified utilities with utilities as indicated in Division 33, Section “Common Work Results for Utilities”.

5. Cut off pipe or conduit in walls or partitions to be removed. Cap, valve, or plug and seal the remaining portion of pipe of conduit after bypassing.

C. Preparation:

1. Conduct demolition operations and removal of debris to ensure minimum interference with roads, streets, walks, and other adjacent occupied and used facilities.

Section 02070- Selective Demolition Cont.

2. Do not close or obstruct streets, walks, or other adjacent occupied or use facilities without permission from Government through ESD Construction

Representative, and AHJ. Provide alternate routes around closed or obstructed traffic ways if required by AHJ.

3. Conduct demolition operations to prevent to prevent injury to people and damage to adjacent construction or facilities to remain. Ensure safe passage of people around selective demolition area.

a. Erect temporary protection, such as walks, fences, railings, canopies, and covered passageways, where required by AHJ. Protect existing site improvements, appurtenances, and landscaping to remain.

b. Erect a plainly visible fence around drip line of individual trees or around perimeter drip lines of groups of trees to remain.

D. Pollution Controls:

1. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

2. Clean adjacent structures and improvements of dust, dirt, and debris caused by selective demolition operations. Return adjacent areas to condition existing before start of selective demolition.

E. Selective Demolition:

1. Demolish and remove existing construction only to the extent required by new construction and as indicated. Use methods required to complete Work within limitations of governing regulations and as follows:

a. Proceed with selective demolition systematically, from higher to lower levels. Complete selective demolition of each floor or tier before disturbing supporting members on lower floors

b. Neatly cut openings and holes plumb, square, and true to dimensions required. Use cutting methods least likely to damage construction to remain or adjoining construction. To minimize disturbance of adjacent surfaces, use hand or small power tools designed for sawing or grinding, not hammering and chopping. Temporarily cover openings to remain.

c. Cut or drill from exposed or finished side into concealed surfaces to avoid marring existing finished surfaces.

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d. Do not use cutting torches until work areas is cleared of flammable materials. At concealed spaces, such as duct or pipe interiors, verify condition and contents of hidden space before proceeding with flame0cutting operations. Maintain portable fire-suppression devices at and during flame-cutting operations.

e. Maintain adequate ventilation when using cutting torches. Do not use cutting torches until is cleared of all flammable materials.

f. Remove decayed, vermin-infested, or otherwise dangerous or unsuitable materials and promptly dispose of offsite.

Section 02070- Selective Demolition Cont.

g. Remove structural framing members and lower to ground by method suitable to avoid free-fall and prevent ground impact or dust generation.

h. Locate selective demolition equipment throughout the structure and remove debris and materials so as to not impose excessive loads on supporting walls, floors, or faming.

i. Dispose of demolished items and materials promptly. On-site storage or sale of removed items is prohibited.

j. Return elements of construction and surfaces to remain to condition existing before start of selective demolition operations.

2. Demolish concrete and masonry materials into small pieces. Cut concrete and masonry at junctions with construction to remain, using power-driven masonry saw, or hand tools; do not use power driven impact tools near existing elements to remain.

3. Brake up and remove concrete slabs on grade, unless otherwise shown to remain.

4. Remove resilient floor covering adhesive according to recommendations of the

Resilient Floor Covering Institute’s (RFCI) “Recommended Work Practices for the Removal of Resilient Floor Coverings” and Addenda.

a. Remove residual adhesives and prepare substrates for new floor coverings by one of the methods recommended by RFCI.

5. Remove no more existing roofing than be covered by new roofing in one day.

See Division 7 for new roofing requirements.

6. Remove air-conditioning equipment without releasing refrigerants.

7. Removal of Materials to be Stored and Replaced: Where indicated, carefully remove materials to be removed and stored for reinstallation to allow completion of Work by other trades.

a. Carefully remove, clean, and store in a manner and location to prevent materials from being damaged.

1. Material will be cleaned sufficiently to remove dust and dirt which would result in materials being further soiled during handling and storage and during removal and replacement operations.

b. Coordinate with other trades to confirm the extent of Work to be removed to allow completion of their Work without damaging adjacent items left in place.

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c. After completion of Work of other trades, replace material removed.

Replace all materials damaged during removal, storage with new materials to match existing at no cost to the Government.

8. Take appropriate action to check the spread of dust to occupied portions of adjacent buildings. Comply with regulations of air pollution agencies.

F. Patching and Repairs:

1. Promptly patch and repair holes and damaged surfaces caused to adjacent construction by selective demolition.

2. Where repairs to existing surfaces required, patch to produce surfaces suitable for new materials.

Section 02070- Selective Demolition Cont.

a. Completely fill holes and depressions in existing walls to remain with an approved and appropriate material to match existing.

3. Restore exposed finishes of patched areas to extend finished restoration into adjoining construction to remain in manner that eliminates evidence of patching and refinishing.

G. Disposal of Unrecycled Demolished Materials:

1. General: Promptly dispose of demolished materials. Do not allow demolished materials to accumulate on-site.

2. Contact Garrison Safety Office, 197 6th Ave., Bldg 1109-D, Rm. 318 for disposal of smoke detectors and EXIT signs.

3. Burning: Do not burn demolished materials

4. Disposal: Transport demolished materials off property and legally dispose of materials per Ft. Knox, DPW/ EMD guidelines.

H. Recycling of Demolished Material:

1. General: All concrete slabs and pavement, asphaltic pavement, steel components, brick and concrete masonry will be recycled per DPW/EMD guidelines. Landfilling is not permitted.

I. Cleaning:

1. Sweep unoccupied building broom clean on completion of selective demolition operation.

2. Clean areas in occupied buildings affected by selective demolition to a dust free condition on completion.

3. Change filters on air-handling equipment on completion of selective demolition operations.

End of Section- 02070