ST. VINCENT COLLEGE SIS AND HERMAN DUPRÉ SCIENCE PAVILION

SECTION 31 40 00 - SHORING AND UNDERPINNING

PART 1 - GENERAL

1.01 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.02 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 RELATED SECTIONS

A. Related Sections include:

1. Section 31 20 00 - Earthwork.

1.04 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 SUBMITTALS

A. 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.

1.06 QUALITY ASSURANCE

A. 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)