02 41 16 Structure Demolition.pdf

02 41 16 – Structure Demolition

1.0 General

1.1 Summary

A. Section Includes:

1. Demolition and removal of structures and site elements.

2. Disconnecting, capping or sealing, and abandoning in-place or removing site utilities.

1.2 Definitions

A. Abandon: The Contractor shall detach portions of items from existing construction, and legally dispose of them off-site, unless indicated to be removed and salvaged or removed and reinstalled, as necessary, to allow new construction. Seal remaining portions of pipe and fill in remaining portions of the structure and leave in place.

B. Remove: The Contractor shall detach items from existing construction and legally dispose of them off-site, unless indicated to be removed and salvaged or removed and reinstalled.

C. Remove and Return to Owner: The Contractor shall detach items from existing construction, clean, and deliver them to the Owner.

D. Existing to Remain: Existing items of construction that are not to be permanently removed by the Contractor and that are not otherwise indicated to be removed, removed and salvaged, or removed and reinstalled.

1.3 Materials Ownership

A. Unless otherwise indicated, demolition waste shall become property of the Contractor.

B. Items identified on the Contract Drawings or other items of interest or value to Owner that may be uncovered during demolition, shall remain the property of Owner:

1. Following items are of interest to Owner:

a. Inlet grates.

b. Manhole covers.

c. Roadway plates.

2. Carefully salvage in a manner to prevent damage and promptly return to Owner.

3. Provide a cursory cleaning to remove any dirt, debris, paint, or flaking rust, prior to furnishing to the Owner.

1.4 Closeout Submittals

A. Inventory: The Contractor shall submit a list of items that have been removed and salvaged to the Owner and Engineer.

B. Landfill Records: Where applicable, the Contractor shall provide receipts indicating acceptance of hazardous wastes from the Project by a landfill facility licensed to accept hazardous wastes.

1.5 Quality Assurance

A. Regulatory Requirements: Comply with hauling and disposal regulations of authorities having jurisdiction.

B. Standards: Comply with ANSI A10.6 and NFPA 241.

1.6 Project Conditions

A. Existing facilities must remain in operation throughout the construction period until such time as new construction is accepted and placed into operation. The Contractor shall conduct demolition so utility services will not be disrupted unnecessarily.

B. The Contractor shall immediately notify Engineer of discrepancies between existing conditions and Contract Drawings before proceeding with selective demolition. Written notification shall be made, even after oral notification by the Contractor to the

Engineer.

C. Hazardous Materials: It is not known if hazardous materials are in present utilities to be demolished. The Contractor is solely responsible to determine if and where any hazardous materials are present, and to ensure proper disposal of the same.

D. Storage or sale of removed items or materials on-Site is not permitted.

E. Utility Service: The Contractor shall maintain existing utilities indicated to remain in service and protect them against damage during selective demolition operations

2.0 Products

2.1 Materials

A. Fill Material: Flowable Backfill, Type C, in accordance with PennDOT Publication 408, Section 220.

B. Bulkheads: Consisting of sewer brick and mortar.

C. Concrete Pipe Plugs: 3,000 PSI (minimum) 28-day compressive strength as specified for Class A Concrete in PennDOT Publication 408, Section 704.

D. Aggregate Backfill: AASHTO #57 Stone.

3.0 Execution

3.1 Examination

A. The Contractor shall verify that utilities have been disconnected and capped before starting selective demolition operations.

B. The Contractor shall survey existing conditions and correlate with requirements indicated to determine extent of selective demolition required.

C. When unanticipated elements that conflict with intended function or design are encountered, the Contractor shall investigate and measure the nature and extent of conflict. Immediately notify the Engineer – if immediate notification is oral, then the

Contractor shall also promptly thereafter submit a written report to Engineer.

D. Survey of Existing Conditions: The Contractor shall record existing conditions by use of preconstruction videotapes:

1. Comply with requirements specified in Section 01 32 33 – Photographic

Documentation and Section 01 32 36 – Video Monitoring and Documentation.

2. The Contractor shall inventory and record the condition of items to be removed and salvaged. Provide photographs of conditions that might be misconstrued as damage caused by salvage operations.

3.2 Preparation

A. Site Access and Temporary Controls: The Contractor shall conduct selective demolition and debris-removal operations to ensure minimum interference with roads, streets, walks, walkways, and other adjacent occupied and used facilities:

1. Comply with requirements for access and protection specified in Section 01 50 00

– Temporary Facilities and Controls.

B. Temporary Shoring: The Contractor shall provide and maintain shoring, bracing, thrust restraint, and structural supports as required to preserve stability and prevent movement, settlement, or collapse of construction and finishes to remain, and to prevent unexpected or uncontrolled movement or collapse of construction being demolished:

1. Strengthen or add new supports when required during progress of selective demolition.

2. The Owner is at no times and under no circumstances responsible for any shoring activities. Shoring is the sole responsibility of the Contractor, and all costs for shoring design, furnishing, installing, maintaining and removing are incidental to the Project.

C. Contractor is responsible for removal of all liquid and sludge waste as necessary to perform the work as indicated in the Contract Documents. The Contractor is responsible for proper disposal of the same.

3.3 Demolition

A. General: The Contractor shall demolish and remove existing construction only to the extent required by new construction and as indicated. Use methods required to complete the Work within limitations of governing regulations and as follows:

1. 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. Use hand tools or small power tools designed for sawing or grinding, not hammering and chopping, to minimize disturbance of adjacent surfaces.

Temporarily cover openings to remain.

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

3. Do not use cutting torches until work area is cleared of flammable materials. At concealed spaces, such as duct and pipe interiors, verify condition and contents of hidden space before starting flame-cutting operations. Maintain portable fire-suppression devices during flame-cutting operations.

4. Maintain adequate ventilation when using cutting torches.

5. Remove decayed, vermin-infested, or otherwise dangerous or unsuitable materials and promptly dispose of off-Site.

6. Dispose of demolished items and materials promptly.

B. Capped Utilities- the Contractor shall:

1. Disconnect and cap designated utilities as indicated on the Contract Drawings.

2. Identify utilities at termination of demolition.

3. Record termination or capped location on Record Documents.

C. Pipelines located within the PennDOT right-of-way that are 8-inches in nominal diameter and greater, must be purged of all product, backfilled with a flowable fill, capped, and sealed. This shall be accomplished by the Contractor, at no additional cost to the Owner.

D. Removed and Salvaged Items- the Contractor shall:

1. Clean salvaged items.

2. Transport items to Owner's storage area designated by Owner.

3. Protect items from damage during transport and storage.

E. Existing Items to Remain: The Contractor shall protect construction indicated to remain against damage and soiling during selective demolition. When permitted by

Engineer, items may be removed to a suitable, protected storage location during selective demolition, cleaned, and reinstalled in their original locations after selective demolition operations are complete.

3.4 Disposal Of Demolished Materials

A. General: Except for items or materials indicated to be reused, salvaged, reinstalled, or otherwise indicated to remain Owner's property, the Contractor shall remove demolished materials from Project site and legally dispose of them in an EPA-approved landfill:

1. Do not allow demolished materials to accumulate on-site.

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

3. Remove debris from elevated portions of building by chute, hoist, or other device that will convey debris to grade level in a controlled descent.

B. Burning: Do not burn demolished materials.

C. Disposal: The Contractor shall transport demolished materials off Owner's property and legally dispose of them.

3.5 Cleaning

A. The Contractor shall clean adjacent structures and improvements of dust, dirt, and debris caused by selective demolition operations. Return adjacent areas to condition existing before selective demolition operations began.

3.6 Schedule

A. Existing Items to Be Removed: See Contract Drawings.

B. Existing Items to Be Removed and Returned to Owner:

1. Provide Tapping Coupons to Owner when requested.

2. Provide section of all removed water main pipes to Owner when requested.

C. Existing Items to Be Removed and Reinstalled: None.

D. Existing Items to Remain: See Contract Drawings.

END OF SECTION