102403 — Temporary Support of Excavation or Fill

403.01 Description

Provide temporary support of excavation or fill, as provided in the Contract Documents, for staged construction and as needed for safety and for the support of adjacent pavements and existing structures.

403.02 Materials

Not applicable.

403.03 Construction

Sheet, shore, brace, and support all excavation or fill contiguous to existing or proposed pavements and existing structures to prevent settlement, movement, or damage to the pavement or structure. See Section 402 for support requirements for Class 3 Excavation and Section 405 for support requirements for the Removal of Existing Structures. Design all temporary supports, retained earth structures, sheeting, and shoring by a professional engineer registered in the State of Maryland. When material retained by the temporary support of excavation or fill is greater than 6 ft high, submit details, procedures, and computations the same as specified for falsework details in TC-4.01 and Section 499. The experience specified under TC-4.01 will be waived. Do not attach bracing for temporary support of excavation to permanent existing or proposed structures, unless specified in the plans or approved in writing by the Office of Structures. Requests should include calculations prepared by a professional engineer registered in the State of Maryland, showing that the temporary bracing will not affect the stability, maintenance, and the long term performance of the permanent structure. Do not extend any temporary support structures directly under any portion of proposed structures and pipes or within 5 ft of proposed pile locations, unless specified in the plans or approved in writing by the Office of Structures. Contractors should consider the configuration of the batter on piles when installing the supports. Remove temporary support of excavation or fill when no longer needed. Remove supports in their

403.04 Measurement and Payment

face of the temporary support structure. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS The payment will be full compensation for all excavation, backfilling, materials, shipping, installation, complete or partial removal of temporary support of excavation or fill, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.

403.04.01 Support of Excavation or Fill will not be measured but will be paid for at the Contract

lump sum price.

403.04.02 Support of Excavation or Fill will be measured and paid for at the Contract unit price

per linear foot, for the actual installed quantity measured.

403.04.03 Support of Excavation or Fill will be measured and paid for at the Contract unit price

per square foot as measured vertically from the ground line on the front face (lower face) of the support to the groundline on the back face of the support and measured horizontally along the front 404 — PROTECTION OF EXISTING STRUCTURES 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 400 STRUCTURES SECTION 404 — PROTECTION OF EXISTING STRUCTURES

404.01 Description

Protect existing structures due to open excavation, pile placement, sheet pile installation, blasting, removal of existing bridge, or any other item that may affect the existing structures, at locations specified in the Contract Documents.

404.02 Materials

Not applicable.

404.03 Construction

404.03.01 Preconstruction Survey. Retain an approved, experienced seismologist for monitoring

and registering vibrations in adjacent and nearby structures as specified. This protection shall be for any structure that may be liable to any damaging effects of any construction activity operations. Retain an approved commercial photographer. Retain an approved professional engineer registered in Maryland who is experienced in the field of building inspection surveys. This professional engineer will be referred to hereinafter as "Building Inspector.” Prior to beginning any work, the Contractor, the insurer, photographer, building inspector, seismologist, and the Engineer, shall make a detailed inspection of each structure to record the condition of all walls, and other structural elements, as well as its contents and equipment that may be in place, and pavements and sidewalks that may become subject to possible damage claims. Before any inspections are performed, notify the owners of the structures involved, which have been approved by the Engineer, requesting their permission to enter upon the properties for the purpose of making these inspections for the protection of the owner. In the event that access for the purpose of determining the condition of the buildings and structures is refused by any owner, the Contractor shall notify the Engineer in writing and may there upon be relieved of the responsibility for making the survey with respect to the property to which access is denied.