HomeMy WebLinkAbout02 41 19 Selective Site Demolition.DOCSECTION 02 41 19 - SELECTIVE DEMOLITION
GENERAL
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification
Sections, apply to this Section.
SUMMARY
Section Includes:
Demolition and removal of selected portions of building or structure.
Demolition and removal of selected site elements.
Salvage
of existing items to be reused or recycled.
Related Requirements:
Section 01 10 00 "Summary" for restrictions on the use of the premises, Owner-occupancy requirements, and phasing requirements.
Secti
on 01 70 00 "Execution" for cutting and patching procedures.
Section 31 10 00 "Site Clearing" for site clearing and removal of above- and below-grade improvements.
DEFINITIONS
Remove:
Detach items from existing construction and legally dispose of them off-site unless indicated to be removed and salvaged or removed and reinstalled.
Remove and Salvage: Carefully detach
from existing construction, in a manner to prevent damage, and deliver to Owner.
Remove and Reinstall: Detach items from existing construction, prepare for reuse, and reinstall where
indicated.
Existing to Remain: Existing items of construction that are not to be permanently removed and that are not otherwise indicated to be removed, removed and salvaged, or removed
and reinstalled.
MATERIALS OWNERSHIP
Unless otherwise indicated, demolition waste becomes property of Contractor.
PRE-INSTALLATION MEETINGS
Pre-demolition Conference: Conduct conference
at Project site.
Inspect and discuss condition of construction to be selectively demolished.
Review structural load limitations of existing structure.
Review and finalize selective demolition schedule and verify availability of materials, demolition personnel, equipment, and
facilities needed to make progress and avoid delays.
Review requirements of work performed by other trades that rely on substrates exposed by selective demolition operations.
Review
areas where existing construction is to remain and requires protection.
INFORMATIONAL SUBMITTALS
Proposed Protection Measures: Submit report, including drawings, that indicates the
measures proposed for protecting individuals and property, for environmental protection, for dust control and , for noise control. Indicate proposed locations and construction of barriers.
Schedule
of Selective Demolition Activities: Indicate the following:
Detailed sequence of selective demolition and removal work, with starting and ending dates for each activity. Ensure Owner's
building manager's on-site operations are uninterrupted.
Interruption of utility services. Indicate how long utility services will be interrupted.
Coordination for shutoff, capping,
and continuation of utility services.
Use of elevator and stairs.
Coordination of Owner's continuing occupancy of portions of existing building and of Owner's partial occupancy of completed
Work.
Inventory: Submit a list of items to be removed and salvaged and deliver to Owner prior to start of demolition.
Pre-demolition Photographs or Video: Submit before Work begins.
Warranties:
Documentation indicated that existing warranties are still in effect after completion of selective demolition.
CLOSEOUT SUBMITTALS
Inventory: Submit a list of items that have been
removed and salvaged.
Landfill Records: Indicate receipt and acceptance of hazardous wastes by a landfill facility licensed to accept hazardous wastes.
FIELD CONDITIONS
Owner will occupy
portions of building immediately adjacent to selective demolition area. Conduct selective demolition so Owner's operations will not be disrupted.
Conditions existing at time of inspection
for bidding purpose will be maintained by Owner as far as practical.
Before selective demolition, Owner will remove the following items:
Items to be removed before selective demolition
shall be documented in writing prior to any demolition prior to demolition occurring.
Notify Architect of discrepancies between existing conditions and Drawings before proceeding with selective demolition.
Hazardous Materials: It is not expected that hazardous materials
will be encountered in the Work.
Hazardous materials will be removed by Owner before start of the Work.
If suspected hazardous materials are encountered, do not disturb; immediately
notify Architect and Owner. Hazardous materials will be removed by Owner under a separate contract.
Storage or sale of removed items or materials on-site is not permitted.
Utility Service:
Maintain existing utilities indicated to remain in service and protect them against damage during selective demolition operations.
Maintain fire-protection facilities in service during
selective demolition operations.
WARRANTY
Existing Warranties: Remove, replace, patch, and repair materials and surfaces cut or damaged during selective demolition, by methods and with
materials so as not to void existing warranties. Notify warrantor before proceeding.
Notify warrantor on completion of selective demolition, and obtain documentation verifying that
existing system has been inspected and warranty remains in effect. Submit documentation at Project closeout.
PRODUCTS
PEFORMANCE REQUIREMENTS
Regulatory Requirements: Comply with governing
EPA notification regulations before beginning selective demolition. Comply with hauling and disposal regulations of authorities having jurisdiction.
Standards: Comply with ANSI/ASSE A10.6
and NFPA 241.
EXECUTION
EXAMINATION
Verify that utilities have been disconnected and capped before starting selective demolition operations.
Review record documents of existing construction
provided by Owner. Owner does not guarantee that existing conditions are same as those indicated in record documents.
Survey existing conditions and correlate with requirements indicated
to determine extent of selective demolition required.
When unanticipated mechanical, electrical, or structural elements that conflict with intended function or design are encountered, investigate and measure the nature and extent of conflict.
Promptly submit a written report to Architect.
Engage a professional engineer to perform an engineering survey of condition of building to determine whether removing any element might
result in structural deficiency or unplanned collapse of any portion of structure or adjacent structures during selective building demolition operations.
Perform surveys as the Work
progresses to detect hazards resulting from selective demolition activities.
Steel Tendons: Locate tensioned steel tendons and include recommendations for de-tensioning.
Survey of Existing
Conditions: Record existing conditions by use of measured drawings and preconstruction photographs.
Comply with requirements specified in Section 01 32 33 "Photographic Documentation."
Inventory
and record the condition of items to be removed and salvaged. Provide photographs or video of conditions that might be misconstrued as damage caused by salvage operations.
Before selective
demolition or removal of existing building elements that will be reproduced or duplicated in final Work, make permanent record of measurements, materials, and construction details required
to make exact reproduction.
UTILITY SERVICES AND MECHANICAL/ELECTRICAL SYSTEMS
Existing Services/Systems to Remain: Maintain services/systems indicated to remain and protect them against
damage.
Comply with requirements for existing services/systems interruptions specified in Section 01 10 00 "Summary."
Existing Services/Systems to Be Removed, Relocated, or Abandoned:
Locate, identify, disconnect, and seal or cap off indicated utility services and mechanical/electrical systems serving areas to be selectively demolished.
Owner will arrange to shut
off indicated services/systems when requested by Contractor.
Arrange to shut off indicated utilities with utility companies.
If services/systems are required to be removed, relocated,
or abandoned, provide temporary services/systems that bypass area of selective demolition and that maintain continuity of services/systems to other parts of building.
Disconnect, demolish,
and remove fire-suppression systems, plumbing, and HVAC systems, equipment, and components indicated to be removed.
Piping to Be Removed: Remove portion of piping indicated to be removed
and cap or plug remaining piping with same or compatible piping material.
Piping to Be Abandoned in Place: Drain piping and cap or plug piping with same or compatible piping material.
Equipment
to Be Removed: Disconnect and cap services and remove equipment.
Equipment to Be Removed and Reinstalled: Disconnect and cap services and remove, clean, and store equipment; when appropriate,
reinstall, reconnect, and make equipment operational.
Equipment to Be Removed and Salvaged: Disconnect and cap services and remove equipment and deliver to Owner.
Ducts to Be Removed:
Remove portion of ducts indicated to be removed and plug remaining ducts with same or compatible ductwork material.
Ducts to Be Abandoned in Place: Cap or plug ducts with same or compatible ductwork material.
PREPARATION
Site Access and Temporary Controls: Conduct selective demolition and debris-removal
operations to ensure minimum interference with roads, streets, walks, walkways, and other adjacent occupied and used facilities.
Comply with requirements for access and protection specified
in Section 01 50 00 "Temporary Facilities and Controls."
Temporary Facilities: Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent
buildings and facilities to remain.
Provide protection to ensure safe passage of people around selective demolition area and to and from occupied portions of building.
Provide temporary
weather protection, during interval between selective demolition of existing construction on exterior surfaces and new construction, to prevent water leakage and damage to structure
and interior areas.
Protect walls, ceilings, floors, and other existing finish work that are to remain or that are exposed during selective demolition operations.
Cover and protect furniture,
furnishings, and equipment that have not been removed.
Comply with requirements for temporary enclosures, dust control, heating, and cooling specified in Section 01 50 00 "Temporary
Facilities and Controls."
Temporary Shoring: Provide and maintain shoring, bracing, 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.
Strengthen or add new supports when required
during progress of selective demolition.
SELECTIVE DEMOLITION, GENERAL
General: 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:
Proceed with selective demolition systematically, from higher to lower level.
Complete selective demolition operations above each floor or tier before disturbing supporting members on the next lower level.
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.
Cut or drill from the exposed or finished side into concealed surfaces
to avoid marring existing finished surfaces.
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 fire watch and portable fire-suppression devices during flame-cutting operations.
Maintain
adequate ventilation when using cutting torches.
Remove decayed, vermin-infested, or otherwise dangerous or unsuitable materials and promptly dispose of off-site.
Remove structural framing members and lower to ground by method suitable
to avoid free fall and to prevent ground impact or dust generation.
Locate selective demolition equipment and remove debris and materials so as not to impose excessive loads on supporting
walls, floors, or framing.
Dispose of demolished items and materials promptly.
Reuse of Building Elements: Project has been designed to result in end-of-Project reuse. Do not demolish
building elements beyond what is indicated on Drawings without Architect's approval.
Removed and Salvaged Items:
Clean salvaged items.
Pack or crate items after cleaning. Identify contents
of containers.
Store items in a secure area until delivery to Owner.
Transport items to Owner's storage area designated by Owner.
Protect items from damage during transport and storage.
Removed
and Reinstalled Items:
Clean and repair items to functional condition adequate for intended reuse.
Pack or crate items after cleaning and repairing. Identify contents of containers.
Protect
items from damage during transport and storage.
Reinstall items in locations indicated. Comply with installation requirements for new materials and equipment. Provide connections,
supports, and miscellaneous materials necessary to make item functional for use indicated.
Existing Items to Remain: Protect construction indicated to remain against damage and soiling
during selective demolition. When permitted by Architect, items may be removed to a suitable, protected storage location during selective demolition and cleaned and reinstalled in their
original locations after selective demolition operations are complete.
SELECTIVE DEMOLITION PROCEDURES FOR SPECIFIC MATERIALS
Concrete: Demolish in small sections. Using power-driven
saw, cut concrete to a depth of at least 3/4 inch at junctures with construction to remain. Dislodge concrete from reinforcement at perimeter of areas being demolished, cut reinforcement,
and then remove remainder of concrete. Neatly trim openings to dimensions indicated.
Masonry: Demolish in small sections. Cut masonry at junctures with construction to remain, using
power-driven saw; then remove masonry between saw cuts.
Concrete Slabs-on-Grade: Saw-cut perimeter of area to be demolished, then break up and remove.
Resilient Floor Coverings: Remove
floor coverings and adhesive according to recommendations in RFCI's "Recommended Work Practices for the Removal of Resilient Floor Coverings." Do not use methods requiring solvent-based
adhesive strippers.
Roofing: Remove no more existing roofing than what can be covered in one day by new roofing and so that building interior remains watertight and weather tight.
See Division 07 for new roofing requirements.
DISPOSAL OF DEMOLISHED MATERIALS
General: Except for items or materials indicated to be recycled, reused, salvaged, reinstalled, or otherwise indicated to remain Owner's property, remove
demolished materials from Project site and legally dispose of them in an EPA-approved landfill.
Do not allow demolished materials to accumulate on-site.
Remove and transport debris in
a manner that will prevent spillage on adjacent surfaces and areas.
Remove debris from elevated portions of building by chute, hoist, or other device that will convey debris to grade
level in a controlled descent.
Burning: Do not burn demolished materials.
Disposal: Transport demolished materials and dispose of at locations and in manner indicated in writing by
Owner.
CLEANING
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.
END OF SECTION 02 41 19