33 00 00.01 26.pdf

St. Marys 5kV Switchgear SSM5KV20

SECTION 33 00 00.01 26

CRIB DAM CIVIL STRUCTURES

PART 1 GENERAL

1.1 DESCRIPTION OF WORK

This specification contains the requirements for Contractor design and the submittal requirements for Government approval for transformer foundations, and steel support structures for electrical equipment which are necessary for installation of the new dry-type transformer at St. Mary Soo Lock and which must be completed after contract award and prior to fabrication and installation, and/or construction.

These requirements are in addition to those contained in the specification sections covering the specific items of work, or as shown. The following specification sections contain additional requirements for items being designed by the Contractor:

SECTION 03 30 53.00 26 Cast-In-Place Concrete SECTION 05 05 23.16 26 Structural Steel Welding And Fabrication SECTION 05 50 04.00 26 Metals: Miscellaneous, Standard Articles, Shop Fabricated Items SECTION 13 48 00.00 26 Seismic Restraint For Mechanical And Electrical Equipment SECTION 31 00 00.00 26 Earthwork

The contract drawings over the crib dam indicate the general arrangement and outline of the structures, the equipment to be accommodated by the structures, required clearances, limits, and other pertinent features.

These plans are not approved to be used directly for fabrication or construction in the field since the final sizing and detailed design will be performed by the Contractor. The contract drawings are based on information as shown on as-constructed drawings and as per limited field verification of critical dimensions. The Contractor is required to field verify all critical measurements at the site and of the transformer in order to complete the design of the civil structures.

All new civil structures over the crib dam must be designed, detailed, and furnished/installed complete including all appurtenances. The Contractor must furnish the detailed design conforming with the design criteria and other requirements specified herein and on the drawings. The Contractor must provide all necessary design completion, submit for approval final design drawings for approval.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN CONCRETE INSTITUTE (ACI)

ACI 318 (2014; Errata 1-2 2014; Errata 3-5 2015;

Errata 6 2016; Errata 7-9 2017) Building

SECTION 33 00 00.01 26 Page 1 Amendment 001 to Advertised Set

Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14)

AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

AISC 325 (2017) Steel Construction Manual

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7-10 (2010; Errata 2011; Supp 1 2013) Minimum Design Loads for Buildings and Other Structures

ASCE 113 (2008) Substation Structure Design Guide

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C2 (2017) National Electrical Safety Code

U.S. ARMY CORPS OF ENGINEERS PUBLICATIONS (USACE)

EM 1110-1-1905 (1992) Bearing Capacity of Soils

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-05 Design Data

Design Data ; G

SD-07 Certificates

Registered Professional Engineer

1.4 DESIGNER QUALIFICATIONS

All computations and drawings submitted as part of the switchyard civil structures design must be stamped and signed by a civil/structural engineer that is a registered professional engineer who has done the design himself/herself or supervised and reviewed work if done by other engineers. The registered professional engineer must demonstrate a minimum three years of relevant experience in designing switchyard civil structures. Provide a resume demonstrating the minimum years of experience; including name of firm(s) the engineer was employed by, name of project(s) they worked on, contract number, project location, date of design or construction completion, contract or project point of contact with contact information (address, phone number, e-mail), and describe relevant experience.

1.5 DESIGN STANDARDS

1.5.1 General Requirements

The Contractor's design must address all required site improvements, SECTION 33 00 00.01 26 Page 2 grading, barrow, fill, soil compaction, reinforced concrete foundations, storm drainage, any structural steel supports, and anchorage needed in the switchyard as shown on the drawings. For all civil/ structural items designed as part of this contract, submit design data as required in paragraph "SUBMISSION OF DESIGN DATA". The detailed drawings must be modeled on the contract drawings and contain full construction detail in conformance with the requirements of the plans and specifications. The drawings must be provided in as-constructed format after work is complete. Install new grounding or repair existing switchyard grounding disturbed by the development of switchyard civil structures and ground new equipment and structures as required per SECTION 26 05 26.00 26 GROUNDING

AND GROUND TESTING.

1.5.2 Structural Design Requirements

Codes and standards to be referenced in the design calculations include but are not limited to ACI 318 , AISC 325 , ASCE 7-10 . Determine the bearing capacity of the soil as described in EM 1110-1-1905 .

Post-installed anchorage must be designed and installed per the requirements of this section, the requirements of the equipment manufacturer, and 13 48 00.00 26 SEISMIC RESTRAINT FOR MECHANICAL AND ELECTRICAL EQUIPMENT. Use the following load parameters as applicable in the design of all switchyard civil structures:

Risk Category: IV

Seismic Importance Factor: 1.50

Basic Wind Speed: 90 mph with I = 1.15 (When using ASCE 113) 120 mph (When using ASCE 7-10)

Exposure Category: C

Site Class: D

Mapped Spectral Accelerations: S DS = 0.055

1.5.3 Miscellaneous Steel Support Structures

Design steel supports in accordance with the applicable practices and methodologies as described in ASCE 113 . Design the steel support to adequately handle the dead loads, operating equipment loads, and applicable loads as required by IEEE C2 and ASCE 7-10 . Include all applicable installation and maintenance loads in the design. Design loads, load factors and strength requirements are to conform with IEEE C2 Grade C construction and with ASCE 7-10 . Design steel supports in accordance with AISC 325 for steel design, but do not exceed 90 percent of the materials yield strength, and ACI 318 for anchorage to concrete.

Design steel support using galvanized steel shapes. Assure structural detailing and all connections, including anchorage to concrete foundations, are detailed to avoid accumulation of moisture. Provide drainage weep holes at the low point in all members with closed or tubular sections.

1.5.4 Transformer Foundation and Bollard Foundation

Design all reinforced concrete foundations in accordance with the loads

SECTION 33 00 00.01 26 Page 3 and standards as defined herein in addition to the loads for the transformer as defined in the contractor submitted transformer design data from the transformer manufacturer. Design foundations to include embedded steel channels for mounting the seismic restraints (part 34) which must be welded to the embedded channels as per the transformer manufacturer's design data. Design foundations to prevent frost heave in accordance with applicable local codes. Provide expansion/contraction joints in between new foundation and slab and the existing which will accomodate normal temperature shrinkage and settlement.

1.5.4.1 Existing Site Conditions

Existing site is as shown. Provide a new transformer foundation and new bollard foundations. Existing cable tunnel is as shown.

1.6 SUBMISSION OF DESIGN DATA

Design Data must be approved prior to procurement fabrication, and installation of associated materials and equipment.Design Data must be submitted for each civil structure and must include each of the following items which are described in the following sub-paragraphs of same title:

a) Drawing Index

b) Bill of Materials

c) Dimensioned Site Arrangement Drawings

d) Detailed Drawings

e) Product Data

f) Design Calculations

1.6.1 Drawing Index

Contractor must submit an index for each drawing set submitted. The index mustl be part of the accompanying drawing set, having a title block, border, and sheet number compatible with the drawing set.

1.6.2 Bill of Materials

Bill of materials or parts lists must be included on the drawings, consisting of total quantity, manufacturer, part number, and weight of item or equipment; or bill of materials must be drawings that are part of the drawing set, having a title block, border, and sheet number compatible with the drawing set. Bill of materials must provide a cross reference between manufacturer data and shop drawings.

1.6.3 Drawings

Submit drawings which contain full construction detail in conformance with the requirements of the plans and specifications for all switchyard civil structures. Drawings must be easily readable in half-size format.

Weights of items and assemblies must be included on the drawings.

1.6.3.1 Dimensioned Assembly Drawings

Submit dimensioned site arrangement drawings for the overall switchyard.

Show plan and elevation views indicating locations and layout of all equipment and structures with dimensions and required elevations and clearances which have been feild verified by the Contractor.

SECTION 33 00 00.01 26 Page 4

1.6.3.2 Detailed Drawings

Detailed drawings must be submitted for approval prior to fabrication and construction. Drawings for individual structures must reference an assembly drawing of the switchyard. When detailed drawings are submitted, they must be submitted with arrangement drawings and bill of materials/parts lists, and contain full detail needed to construct, fabricate and install the structure.

1.6.4 Product Data

Submit complete descriptive literature and specifications of each product or system of products for the job with original, legible manufacturer's cut sheets and data sheets to clearly indicate physical construction, operation, mechanical and structural characteristics and associated hardware, as applicable. For sheets with extraneous data, clearly indicate which data applies by crossing out other models, circling the correct options, etc. Include manufacturer's catalog numbers and designations, and clearly cross-reference with detail drawings as appropriate. Product data submitted for approval must clearly show conformance with these specifications, including but not limited to product manufacturers' declarations of conformance to applicable technical standards. Product data must be approved prior to procurement of associated materials and equipment.

1.6.5 Design Calculations

Submit design calculations for site civil and structural work provided as per this contract for approval. Submit design calculations concurrently with the drawings and product data specific to the designed structure.

Calculations shall include a list of assumptions made, a list of all codes and standards referenced, equations, specified design paramenters, limits, factors of safety, sources of values used, free body diagrams or sketches of each load case.

1.6.5.1 Finite Element Analysis (FEA)

Finite Element Analysis (FEA) using beam elements is required for complex switchyard structures such as dead-end towers. Smaller, simpler switchyard structures may be designed by direct calculation upon approval of Contractor's request. When FEA data is submitted it must be accompanied by sample written calculations that support the FEA. Post-processing FEA data, such as graphics output, submitted alone will not be accepted.

PART 2 PRODUCTS

Refer to products listed in approved design and the requirements of the referenced specifications in paragraph DESCRIPTION OF WORK.

PART 3 EXECUTION

3.1 CONSTRUCTION AND INSTALLATION

Perform all work, provide all materials, and qualified site supervision required to execute the approved design for site improvements necessary to install the new switchyard structures and equipment in the locations shown on the drawings and in compliance with the approved design and these specifications.

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