Historic Preservation - Technical Procedures
General Guidelines For The Demolition Of Selected Masonry Materials
The Old Custom House, New York, Ny - Gsa/Pbs
General Guidelines For The Demolition Of Selected Masonry Materials
GENERAL GUIDELINES FOR THE DEMOLITION OF SELECTED MASONRY
A. This procedure includes guidelines to follow for the
selective removal and subsequent disposal of selected
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
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.
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
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
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
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
a. Storage or sale of removed items on site will
not be permitted.
A. General: Provide all materials necessary to perform
demolition work as specified.
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.
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
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
2) Provide weatherproof closures for
exterior openings resulting from
d. Locate, identify, stub off, and disconnect
utility services that are not indicated to
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
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
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
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
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
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
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
2. Locate demolition equipment throughout structure
and promptly remove debris to avoid imposing
excessive loads on supporting walls, floors, or
3. Provide services for effective air and water
pollution controls as required by local authorities
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
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
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
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
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
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