ST. VINCENT COLLEGE
SIS AND HERMAN DUPRÉ SCIENCE PAVILION
SECTION 31 40 00 - SHORING AND UNDERPINNING
PART 1 - GENERAL
1.01
A.
1.02
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General
and Supplementary Conditions and Division 1 Specification Sections,
apply to this Section.
SECTION INCLUDES
A.
Shoring, bracing, and underpinning necessary to protect existing
buildings, streets, walkways, utilities, and other improvements;
excavation protection against loss of ground or caving of
embankments.
B.
Maintenance of shoring, bracing and underpinning.
C.
Removal of shoring and bracing when no longer needed.
1.03
A.
RELATED SECTIONS
Related Sections include:
1.
1.04
Section 31 20 00 - Earthwork.
DESIGN/PERFORMANCE REQUIREMENTS
A.
The Contractor shall be solely responsible for the design and
adequacy of all shoring, bracing and shall make any changes therein
that may be required to assure proper quality of work and to
safeguard all workmen, existing adjacent work, existing structures,
and work within any excavation.
B.
The Contractor is required to assess all conditions of the project
site with regard to requirements for temporary shoring and supports
and shall estimate, plan and execute the work accordingly.
1.05
A.
1.06
A.
SUBMITTALS
Layout Drawings: Provide layout drawings for shoring and bracing
system and other data prepared and sealed by a registered
Professional Engineer licensed in the State of Pennsylvania.
System design and calculations must be acceptable to local
authorities having jurisdiction and the Architect.
QUALITY ASSURANCE
Qualifications: Engage and assign supervision of shoring, bracing
and underpinning work to a qualified structural consultant.
SHORING AND UNDERPINNING
31 40 00 - 1
(45307035)
ST. VINCENT COLLEGE
SIS AND HERMAN DUPRÉ SCIENCE PAVILION
1.07
PROJECT/SITE CONDITIONS
A.
Before starting work, check and verify governing dimensions and
elevations. Survey condition of adjoining properties. Take
photographs to record any prior settlement or cracking of
structures, pavements, and other improvements. Prepare a list of
such damages, verified by dated photographs, and signed by
Contractor and others conducting investigation.
B.
Survey adjacent structures and improvements, establishing exact
elevations at fixed points to act as benchmarks. Clearly identify
benchmarks and record existing elevations. Locate datum level used
to establish benchmark elevations sufficiently distant so as not to
be affected by movement resulting from excavation operations.
C.
Existing Utilities: Protect existing active sewer, water, gas,
fuel lines, electricity and other utility services and structures.
1.
Notify municipal agencies and service utility companies having
jurisdiction. Comply with requirements of governing
authorities and agencies for protection, relocation, removal
and discontinuing of services, as affected by this work.
PART 2 - PRODUCTS
2.01
MATERIALS, GENERAL
A.
Provide suitable shoring and bracing materials which will support
loads imposed. Materials need not be new, but should be in
serviceable condition.
B.
Where wood is part of shoring system near existing structures, use
pressure preservative treated materials.
PART 3 - EXECUTION
3.01
GENERAL
A.
Excavation Work: Contractor shall furnish, place and remove all
sheeting, shoring, bracing, and underpinning necessary to retain
earth banks, prevent cave-ins and displacement of adjoining soil;
and to protect all new or existing utilities, sidewalks, curbs,
streets and foundations and existing structures during excavation
work to complete their work.
B.
Structural Modifications, Formwork, Supports: Contractor shall
design, furnish, place and remove all required shoring, bracing and
supports to prevent movement, settlement or collapse of existing
and/or new structural elements, including new concrete formwork.
1.
Temporary structural elements shall be installed as required
by the progress of the work and shall remain in place until
the permanent work becomes capable of supporting subsequent
loads.
SHORING AND UNDERPINNING
31 40 00 - 2
(45307035)
ST. VINCENT COLLEGE
SIS AND HERMAN DUPRÉ SCIENCE PAVILION
3.02
SHORING
A.
Wherever shoring is required, locate the system to clear permanent
construction and to permit forming and finishing of concrete
surfaces. Provide shoring system adequately anchored and braced to
resist earth and hydrostatic pressures.
B.
Shoring systems retaining earth on which the support or stability
of existing structures is dependent must be left in place at
completion of work.
3.03
BRACING
A.
Locate bracing to clear columns, floor framing construction, and
other permanent work. If necessary to move a brace, install new
bracing prior to removal of original brace.
B.
Do not place bracing where it will be cast into or included in
permanent concrete work, except as otherwise acceptable to
Architect.
C.
Install internal bracing, if required, to prevent spreading or
distortion to braced frames.
D.
Maintain bracing until structural elements are rebraced by other
bracing or until permanent construction is able to withstand
lateral earth and hydrostatic pressures.
3.04
UNDERPINNING
A.
The Contractor shall provide necessary underpinning to protect
existing structures during excavation work and completion of
contract work.
B.
Maximum 4 ft.(1219mm) lengths at any one time, unless otherwise
shown on drawings.
3.05
REMOVAL OF SHORING AND BRACING
A.
Remove shoring and bracing in stages to avoid disturbance to
underlying soils and damage to structures, pavements, facilities,
and utilities.
B.
Repair or replace, as acceptable to Architect, adjacent work
damaged or displaced through the installation or removal of shoring
and bracing work.
END OF SECTION
SHORING AND UNDERPINNING
31 40 00 - 3
(45307035)