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Historic Preservation - Technical Procedures

Spectitle:

General Guidelines For The Demolition Of Selected Masonry Materials

Procedure code:

0207001S

Source:

The Old Custom House, New York, Ny - Gsa/Pbs

Division:

Sitework

Section:

Selective Demolition

Last Modified:

02/24/2012

Details:

General Guidelines For The Demolition Of Selected Masonry Materials



GENERAL GUIDELINES  FOR THE DEMOLITION OF SELECTED MASONRY
MATERIALS


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidelines to follow for the
         selective removal and  subsequent disposal of selected
         masonry materials.

         NOTE:  Historic materials should be retained whenever
         possible.  Demolition of historic materials should not be
         undertaken without prior approval from the Regional
         Historic Preservation Officer.  See also section 3.03
         B.3. below.

1.02 REFERENCES

    A.   Occupational Safety and Health Administration (OSHA).

    B.   American National Standards Institute, Inc. (ANSI), 1430
         Broadway, New York, NY  10018.

    C.   "Manual of Accident Prevention in Construction" by
         Associated General Contractors of American (AGC).

    D.   Basic Safety Code, for applicable State.

1.03 SUBMITTALS

    A.   Quality Control Submittals:  The procedures proposed for
         the accomplishment of salvage and demolition work shall
         be submitted for approval.  The procedures shall provide
         for safe conduct of the work, careful removal and
         disposition of materials specified to be salvaged,
         protection of property which is to remain undisturbed,
         coordination with other work in progress, and timely
         disconnection of utility services.  The procedures shall
         include a detailed description of the methods and
         equipment to be used for each operation, and the sequence
         of operations.  Coordinate with owners continuing
         occupation of portions of existing building.

1.04 QUALITY ASSURANCE

    A.   Qualifications:  Contractor Qualifications:  Minimum 5
         years experience in demolition of comparable work.

    B.   Regulatory Requirements:

         1.   Requirements of Regulatory Agencies:  Comply with
              applicable requirements of rules, regulations,
              laws, ordinances of City, Environmental Health
              Department;  Environmental Protection Agency
              (National Emission Standard for Asbestos); other
              organizations having jurisdiction.

         2.   Dust control:  The amount of dust resulting from
              demolition shall be controlled to prevent the
              spread of dust to occupied portions of the building
              and to avoid creation of a nuisance in the
              surrounding area.  Use of water will not be
              permitted when it will result in, or create,
              hazardous or objectionable conditions such as ice,
              flooding and pollution.

         3.   Photographs of existing conditions of structure
              surfaces, equipment, and adjacent improvements that
              might be misconstrued as damage related to removal
              operations.  File with Owners' Representative prior
              to start of work.

         4.   Patching of Work Outside Limits of Demolition Work:
              Should any existing work which is scheduled to
              remain be damaged as a result of work under this
              Contract, the Contractor shall repair or replace
              such affected work in a manner acceptable to the
              City and governing authorities.  This work, if
              required, shall be done at no additional cost to
              the City.

         5.   Contractor Furnished Permits:  The Demolition
              Contractor shall be responsible for obtaining all
              required permits, such as Sewer Capping Permit,
              etc.; all costs for these permits shall be paid for
              by the Contractor.

         6.   The Contractor shall arrange for disconnection of
              utility services, such as gas, electricity and
              telephone, to building to be demolished, in
              accordance with regulations of utility concerned.
              All equipment on site which belongs to public
              utility company will be removed at this time.
              Utility companies shall also be responsible for
              capping supply ends of lines which are to remain.

         7.   The Demolition Contractor shall seal sewer lines
              leading from structures; cap in approved manner at
              property line or where required by utility.  Use
              capping and sealing materials required by utility.

         8.   Contractor shall comply with the national emission
              standards for hazardous air pollution promulgated
              by the Environmental Protection Agency, Code of
              Federal Regulation (CFR 40, Part 61), when
              demolishing any structure, facility, installation,
              or portion thereof which contains any boiler, pipe
              or any load-supporting structural member that is
              fireproofed or insulated with friable asbestos
              material.

1.05 PROJECT/SITE CONDITIONS

    A.   Existing Conditions:

         1.   Occupancy:  Owner will occupy portions of the
              building immediately adjacent to areas of selective
              demolition.  Conduct selective demolition work in
              manner that will minimize need for disruption of
              Owner's normal operations.  Provide minimum of 72
              hours advance notice to Owner of demolition
              activities that will affect Owner's normal
              operations.

         2.   Condition of Structures:  Owner assumes no
              responsibility for actual condition of items or
              structures to be demolished.

              a.   Conditions existing at time of inspection for
                   bidding purposes will be maintained by Owner
                   insofar as practicable.  However, minor
                   variations within structure may occur by
                   Owner's removal and salvage operations prior
                   to start of selective demolition work.

         3.   Partial Demolition and Removal:  Items indicated to
              be removed by of salvageable value to Contractor
              may be removed from structure as work progresses.
              Transport salvaged items from site as they are
              removed.

              a.   Storage or sale of removed items on site will
                   not be permitted.


PART 2---PRODUCTS

2.01 MATERIALS

    A.   General:  Provide all materials necessary to perform
         demolition work as specified.


PART 3---EXECUTION

3.01 EXAMINATION

    A.   Prior to commencement of selective demolition work,
         inspect areas in which work will be performed.
         Photograph existing conditions to structure surfaces,
         equipment or to surrounding properties which could be
         misconstrued as damage resulting from selective
         demolition work; file photographs with Owner's
         Representative prior to starting work.

3.02 PREPARATION

    A.   Protection:

         1.   General:  Provide interior and exterior shoring,
              bracing, or support to prevent movement,
              settlement, or collapse of areas to be demolished
              and adjacent facilities to remain.

              a.   Cease operations and notify Owner's
                   Representative immediately if safety of
                   structure appears to be endangered.  Take
                   precautions to support structure until
                   determination is made for continuing
                   operations.

              b.   Cover and protect furniture, equipment, and
                   fixtures from soilage or damage when
                   demolition work is performed in ares where
                   such items have not been removed.

              c.   Erect and maintain dust-proof partitions and
                   closures as required to prevent spread of dust
                   or fumes to occupied portions of the building.

                   1)   Where selective demolition occurs
                        immediately adjacent to occupied portions
                        of the building, construct dust-proof
                        partitions of minimum 4-inch studs, 5/8-
                        inch drywall (joints taped) on occupied
                        side, 1/2-inch fire-retardant plywood on
                        demolition side.

                   2)   Provide weatherproof closures for
                        exterior openings resulting from
                        demolition work.

              d.   Locate, identify, stub off, and disconnect
                   utility services that are not indicated to
                   remain.

                   1)   Provide bypass connections as necessary
                        to maintain continuity of service to
                        occupied areas of building.  Provide
                        minimum of 72 hours advance notice to
                        owner if shutdown of service is necessary
                        during changeover.

         2.   Protections:  Provide temporary barricades and
              other forms of protection to protect Owner's
              personnel and general public from damage due to
              selective demolition work.

              a.   Provide protective measures as required to
                   provide free and safe passage of Owner's
                   personnel and general public to occupied
                   portions of building.

              b.   Erect temporary covered passageways as
                   required by authorities having jurisdiction.

              c.   Provide interior and exterior shoring,
                   bracing, or support to prevent movement,
                   settlement, or collapse of structure or
                   element to be demolished and adjacent
                   facilities or work to remain.

              d.   Protect from damage existing finish work that
                   is to remain in place and becomes exposed
                   during demolition operations.

              e.   Protect floors with suitable coverings when
                   necessary.

              f.   Construct temporary  insulated dustproof
                   partitions where required to separate areas
                   where noisy or extensive dirt or dust
                   operations are performed.  Equip partitions
                   with dustproof doors and security locks.

              g.   Provide temporary weather protection during
                   interval between demolition and removal of
                   existing construction on exterior surfaces and
                   installation of new construction to ensure
                   that no water leakage or damage occurs to
                   structure or interior areas of existing
                   building.

              h.   Remove protections at completion of work.

              i.   If damage or settlement occurs to portions of
                   the building to remain, immediately provide
                   shoring to prevent further damage or
                   settlement and prepare a plan for repair.  The
                   plan for repair shall be approved by the
                   Contracting Officer before repair work begins.

         3.   Damages:  Promptly repair damages caused to
              adjacent facilities by demolition work.

         4.   Traffic:  Conduct selective demolition operations
              and debris removal to ensure minimum interference
              with roads, streets, walks, and other adjacent
              occupied or used facilities.

              a.   Do not close, block, or otherwise obstruct
                   streets, walks, or other occupied or used
                   facilities without written permission from
                   authorities having jurisdiction.  Provide
                   alternative routes around closed or obstructed
                   traffic ways if required by governing
                   regulations.

         5.   Flame Cutting:  Do not use cutting torches for
              removal until work area is cleared of flammable
              materials.  At concealed spaces, such as interior
              of ducts and pipe spaces, verify condition of
              hidden space before starting flame-cutting
              operations.  Maintain portable fire suppression
              devices during flame-cutting operations.  Follow
              procedures for "Hot Work" in 01100-01-S.

         6.   Explosives:  Use of explosives will not be
              permitted.

         7.   Utility Services:  Maintain existing utilities
              indicated to remain in service and protect them
              against damage during demolition operations.

              a.   Do not interrupt utilities serving occupied or
                   used facilities, except when authorized in
                   writing by authorities having jurisdiction.
                   Provide temporary services during
                   interruptions to existing utilities, as
                   acceptable to governing authorities.

              b.   Maintain fire protection services during
                   selective demolition operations.

         8.   Environmental Controls:  Use water sprinkling,
              temporary enclosures and other methods to limit
              dust and dirt migration.  Comply with governing
              regulations pertaining to environmental protection.

              a.   Clean adjacent structures and improvements of
                   dust, dirt and debris caused by demolition
                   operations, as directed by the City or
                   governing authorities.  Return adjacent areas
                   to conditions existing prior to start of work.

              b.   Do not use water when it may create hazardous
                   or objectionable conditions such as ice,
                   flooding, and pollution.

              c.   Noise:  Comply with rules and regulations of
                   governing agencies for the use of air hammers,
                   other noisy equipment during normal work
                   hours.

3.03 ERECTION, INSTALLATION, AND APPLICATION

    A.   General:  Perform selective demolition work in a
         systematic manner.  Use such methods as required to
         complete work indicated in accordance with demolition
         schedule and governing regulations.

         1.   Demolish concrete and masonry in small sections.
              Cut concrete and masonry at junctures with
              construction to remain using power-driven masonry
              saw or hand tools; do not use power-drawn impact
              tools.

         2.   Locate demolition equipment throughout structure
              and promptly remove debris to avoid imposing
              excessive loads on supporting walls, floors, or
              framing.

         3.   Provide services for effective air and water
              pollution controls as required by local authorities
              having jurisdiction.

         4.   For foundation walls, demolish to a depth of not
              less than 12" below existing ground surface.
              Demolish and remove below-grade wood or metal
              construction.  Break up below-grade concrete slabs.

         5.   For interior slabs on grade, use removal methods
              that will not crack or structurally disturb
              adjacent slabs or partitions.  User power saws
              where possible.

         6.   For sidewalks and curbs, use removal methods that
              will not crack or structurally disturb adjacent
              walls, or curbs.  Use power saws where possible.

         7.   Completely fill below-grade areas and voids
              resulting from demolition work.  Provide fill
              consisting of approved earth, gravel, or sand, free
              of trash and debris, stones over 6 inches in
              diameter, roots, or other organic matter.

         8.   Do not cut structural steel except as specifically
              detailed.

         9.   Refer to the structural drawings for demolition
              work requiring detailed sequenced procedure to
              protect remaining construction.

    B.   Salvaged Materials:

         1.   Salvaged Items:  Where indicated to be salvaged and
              delivered to Owner, carefully remove indicated
              items, clean, store, and turn over to Owner and
              obtain receipt.

         2.   Reused Items:  Where indicated to be removed for
              reuse, carefully remove, clean, store and reinstall
              at locations indicated.

         3.   Historic artifacts, including their contents,
              commemorative plaques and tablets, antiques,
              revolving doors and other articles of historic
              significance, remain property of Owner.  Notify
              Owner's Representative if such items are
              encountered and obtain acceptance regarding method
              of removal and salvage for Owner.

    C.   Disposition of Material:  

         1.   Title to Materials:  Title to all materials and
              equivalent to be demolished, excepting reserved
              items, is vested in the Contractor upon receipt of
              Notice to Proceed.  The Government will not be
              responsible for the condition, loss or damage to
              such property after Notice to Proceed.

    D.   Reserved Items:  

         1.   Property of the Government:  Remove reserved items
              indicated in a manner to prevent damage.  Pack or
              crate in a manner to protect the items from damage
              in handling, temporary or permanent storage or
              shipment.  Securely attach embossed metal tags to
              identify items prior to storage, in a manner not
              damaging to items.  Deliver to the designated
              storage areas on the site or off the site as
              directed by the Government and place in permanent
              storage or reinstall in the work as required.

              a.   Repair items damaged during removal,
                   reinstallation handling or storage, or replace
                   with new to match existing as acceptable.

              b.   When directed, turn over items, damaged during
                   removal, reinstallation, handling or storage,
                   including broken pieces to the Government.
                   The Government reserves the right to repair
                   items and to withhold the cost of such repair
                   from any payments due or becoming due to the
                   Contractor.

3.04 ADJUSTING/CLEANING

    A.   Remove from building site debris, rubbish, and other
         materials resulting from demolition operations.
         Transport and legally dispose of off-site.

         1.   If hazardous materials are encountered during
              demolition operations, comply with applicable
              regulations, laws and ordinances concerning
              removal, and handling, and protection against
              exposure or environmental pollution.

         2.   Burning of removed materials is not permitted on
              project site.

    B.   Remove tools, equipment and protection, leaving interior
         areas broom clean.

    C.   Repair demolition performed in excess of that required.
         Return elements of construction and surfaces to remain to
         condition existing prior to start operations.  Repair
         adjacent construction or surfaces soiled or damaged by
         selective demolition work.

                         END OF SECTION