26 05 10 - Basic Electrical Materials & Methods.pdf

26 05 10 – BASIC ELECTRICAL MATERIALS AND METHODS

Herbert, Rowland & Grubic, Inc. 26 05 10-1 005153.0436

SECTION 26 05 10 – BASIC ELECTRICAL MATERIALS AND METHODS

PART 1 – GENERAL

1.1 DESCRIPTION OF WORK

A. General: The Contractor shall provide the labor, tools, equipment, and materials necessary to provide basic electrical materials in accordance with the plans and as specified herein.

A. This section includes limited scope general construction materials and methods for application with electrical installations as follows:

1. Excavation for underground utilities and services, including underground raceways, vaults, and equipment.

2. Miscellaneous metals for support of electrical materials and equipment.

3. Nailers, blocking, fasteners, and anchorage for support of electrical materials and equipment.

4. Joint sealers for sealing around electrical materials and equipment, and for sealing penetrations in fire and smoke barriers, floors, and foundation walls.

5. Concrete used for the following:

a. Housekeeping pads.

b. Pipe supports.

c. Pole foundations.

1.2 QUALITY ASSURANCE

A. Codes and Standards: Perform all work associated with basic electrical materials in compliance with applicable requirements of governing agencies having jurisdiction and in accordance with these plans and as specified herein. Where provisions of the pertinent codes and standards conflict with this specification, the more stringent provision shall govern:

1. American Institute of Steel Construction (AISC) "Specifications for the Design, Fabrication, and Erection of Structural Steel for Buildings."

2. American Welding Society (AWS) D1.1 "Structural Welding Code - Steel."

3. National Electrical Code (NEC).

B. Qualifications:

1. Installer Qualifications. Engage an experienced Installer for the installation and application of joint sealers.

2. Qualify welding processes and welding operators in accordance with American

Welding Society (AWS) D1.1 "Structural Welding Code -Steel."

a. Certify that each welder has satisfactorily passed AWS qualification tests for welding processes involved and, if pertinent, has undergone recertification.

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1.3 SUBMITTALS

A. Submit under provisions of Sections 01 33 00 and as detailed below.

A. General: Furnish manufacturer's product data, test reports, and materials certifications as required.

A. Submit the following:

1. Product data for joint sealers.

2. Shop drawings detailing fabrication and installation for metal fabrications and wood supports and anchorage for electrical materials and equipment.

3. Samples of joint sealer, consisting of strips of actual products showing full range of colors available for each product.

4. Welder certificates, signed by Contractor, certifying that welders comply with requirements specified under "Quality Assurance" article of this section.

1.4 JOB CONDITIONS

A. Apply joint sealers under temperature and humidity conditions within the limits permitted by the joint sealer manufacturer. Do not apply joint sealers to wet substrates.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Deliver joint sealer materials in original unopened containers or bundles with labels informing about manufacturer, product name and designation, color, expiration period for use, pot life, curing time, and mixing instruction for multicomponent materials.

B. Store and handle joint sealer materials in compliance with the manufacturer’s recommendations to prevent their deterioration and damage.

1.6 DEFINITIONS

A. Additional Excavation: Where excavation has reached required subgrade elevations, if unsuitable bearing materials are encountered, continue excavation at the direction of the Engineer until suitable bearing materials are reached.

B. Subbase as used in this section refers to the compacted soil layer used in pavement systems between the subgrade and the pavement base course material.

C. Subgrade as used in this section refers to the compacted soil immediately below the slab or pavement system.

D. Unauthorized excavation as used in this section consists of removal of materials beyond indicated subgrade elevations or dimensions without specific direction from the Engineer.

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PART 2 – PRODUCTS

2.1 MATERIALS

A. Miscellaneous Metals and Reinforcing Materials:

1. Provide steel plates, shapes, bars, and bar grating conforming to ASTM A 36.

2. Provide cold-formed steel tubing conforming to ASTM A 500.

3. Provide hot-rolled steel tubing conforming to ASTM A 501.

4. Provide steel pipe conforming to ASTM A 53, Schedule 40, welded.

5. Provide non-shrink, non-metallic grout which is pre-mixed, factory-packaged, non-staining, non-corrosive, non-gaseous grout, recommended for interior and exterior applications.

6. Provide fasteners which are zinc-coated, type, grade, and class as required.

7. Provide deformed reinforcing bars conforming to ASTM A615, Grade 40 or 60, unless otherwise indicated.

8. Provide reinforcing materials with size and placement as shown on the plans.

9. Provide welded wire fabric conforming to ASTM A185.

B. Miscellaneous Lumber:

1. Provide framing materials that are Standard Grade, light framing size lumber of any species. Number 3 Common or Standard Grade boards complying with West Coast Lumber Inspection Bureau (WCLIB) or American Wood Preservers Association (AWPA) rules or Number 3 boards complying with Southern Pine Inspection Bureau (SPIB) rules. Lumber shall be preservative treated in accordance with AWPA LP-2, and kiln dried to a moisture content of not more than 19 percent.

2. Provide construction panels which are plywood panels; American Plywood

Association (APA) C-D PLUGGED INT, with exterior glue; thickness as indicated, or if not indicated, not less than 15/32 inch.

C. Joint Sealers:

1. Provide joint sealers, joint fillers, and other related materials compatible with each other and with joint substrates under conditions of service and application.

2. Provide colors as selected by the A/E from manufacturer's standard colors.

3. Provide the following types of elastomeric joint sealers:

a. One-part, mildew-resistant, silicone sealant complying with ASTM C 920, Type S, Grade NS, Class 25, for uses in non-traffic areas for glass, aluminum, and nonporous joint substrates, formulated with fungicide, intended for sealing interior joints with non-porous substrates; and subject to in-service exposure to conditions of high humidity and temperature extremes.

4. Provide fire-resistant watertight joint sealers which are two-part, foamed-in-place, silicone sealant formulated for use in through-penetration firestopping around cables, conduit, pipes, and duct penetrations through fire-rated walls and floors. Sealants and accessories shall have fire resistance ratings indicated, as established by testing identical assemblies in accordance with ASTM E 814, by UL, or other testing and inspection agency acceptable to authorities having jurisdiction. Material shall be a closed-cell, non-adhering material.

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2.2 MANUFACTURERS

A. Available Products: Subject to compliance with requirements, products which may be incorporated in the Work include, but are not limited to, the following:

1. One Part, Mildew-Resistant, Silicone Sealant:

a. "Dow Corning 786," Dow Corning Corp.

b. "SCS 1702 Sanitary," General Electric Co.

c. "863 #345 White," Pecora Corp.

d. "Proglaze White," Tremco Corp.

e. "OmniPlus," Sonneborn Building Products Div.

f. Or Equal.

2. Fire Resistant Joint Sealers:

a. "Dow Corning Fire Stop Foam," Dow Corning Corp.

b. "Pensil 851," General Electric Co.

c. Or Equal.

PART 3 – EXECUTION

3.1 COORDINATION

A. Prior to all work of this section, carefully inspect the installed work of all other trades and verify that all such work is complete to the point where this installation may properly commence.

B. Field-verify all locations and dimensions to ensure that the equipment will be properly located, readily accessible, and installed in accordance with all pertinent codes and regulations, the contract documents, and the referenced standards.

C. The work shall be carefully laid out in advance, and where cutting, drilling, etc., of floors, walls, ceilings, or other surfaces is necessary for proper installation, this work shall be carefully done, and any drainage to building, piping, or equipment shall be repaired by skilled mechanics of the trades involved at no additional cost to the Owner.

D. In the event any discrepancies are discovered, immediately notify the Engineer in writing. Do not proceed with installation in areas of discrepancy until all such discrepancies have been fully resolved.

3.2 PREPARATION

A. Preparation for Joint Sealers:

1. Clean surfaces of joints immediately before applying joint sealers to comply with recommendations of joint sealer manufacturer.

2. Apply joint sealer primer to substrates as recommended by joint sealer manufacturer. Protect adjacent areas from spillage and migration of primers, using masking tape. Remove tape immediately after tooling without disturbing joint seal.

3.3 EXCAVATION

A. Comply with the applicable requirements of Division 31 – Earthwork.

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B. For the excavation of underground vaults and electrical structures conform to elevations and dimensions shown within a tolerance of +0.10 foot and extending a sufficient distance to permit placing and removal of concrete formwork, installation of services, other construction, and for inspection:

1. Excavate, by hand, area within drip line or large trees. Protect the root system from drainage and drying out. Maintain moist conditions for root system and cover exposed roots with burlap. Paint root cuts of 1 inch in diameter and larger with emulsified asphalt tree paint.

2. Take care not to disturb bottom of excavation. Excavate by hand to final grade just before concrete reinforcement or precast concrete is placed.

C. Excavate trenches for electrical installation as follows:

1. Excavate trenches to the uniform width, sufficiently wide to provide ample working room and a minimum of 6 to 9 inches clearance on both sides of raceways and equipment.

2. Excavate trenches to depth indicated or required.

3. Limit the length of open trench to that in which installations can be made and the trench backfilled within the same day.

4. Where rock is encountered, carry excavation below required elevation and backfill with a layer of crushed stone or gravel prior to installation of raceways and equipment. Provide a minimum of 6 inches of stone or gravel cushion between rock bearing surface and electrical installations.

D. Backfill excavations as promptly as work permits, but not until completion of the following:

1. Inspection, testing, approval, and locations of underground utilities have been recorded.

2. Removal of concrete formwork.

3. Removal of shoring and bracing, and backfilling of voids.

4. Removal of trash and debris.

E. Where subsidence occurs at electrical installation excavation during the period 12 months after Substantial Completion, remove surface treatment (i.e., pavement, lawn, or other finish), add backfill material, compact to specified conditions, and replace surface treatment. Restore appearance, quality, and condition of surface or finish to match adjacent areas.

3.4 INSTALLATION

A. Erection of Metal Supports and Anchorage:

1. Cut, fit, and place miscellaneous metal fabrications accurately in location, alignment, and elevation to support and anchor electrical materials and equipment.

2. Provide field welding which complies with AWS "Structural Welding Code."

B. Erection of Wood Supports and Anchorage:

1. Cut, fit, and place nailers, blocking, and anchorage accurately in location, alignment, and elevation to support and anchor electrical materials and equipment.

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2. Select fastener sizes that will not penetrate members where opposite side will be exposed to view or will receive finish materials. Make tight connections between members. Install fasteners without splitting wood members.

3. Attach to substrates as required to support applied loads.

C. Application of Joint Sealers:

1. Comply with joint sealer manufacturers' printed application instructions applicable to products and applications indicated, except where more stringent requirements apply.

2. Comply with recommendations of ASTM C 962 for use of elastomeric joint sealants.

3. Immediately after sealant application and prior to time shinning or curing begins, tool sealants to form smooth, uniform beads, to eliminate air pockets, and to ensure contact and adhesion of sealant with sides of joint. Remove excess sealants from surfaces adjacent to joint. Do not use tooling agents that discolor sealants or adjacent surfaces or are not approved by sealant manufacturer.

4. Install firestopping sealant, including forming, packing, and other accessory materials, to fill openings around electrical services penetrating floors and walls, to provide fire stops with fire resistance ratings indicated for floor or wall assembly in which penetration occurs. Comply with installation requirements established by testing and inspecting agency. Use dams to obtain proper sealing.

D. Installation of Housekeeping Pads:

1. Strength, spacing, and placement of equipment housekeeping pads. Provide a housekeeping pad for all floor-mounted equipment, unless noted otherwise.

Fabricate pad as follows:

a. Coordinate size of housekeeping pad with actual equipment provided.

Fabricate base 4 inches larger in both directions than the overall dimensions of the supported equipment.

b. Form concrete pads with framing lumber treated with form release compounds. Provide 1 inch chamfer on top edge and corners of pad.

c. Install reinforcing bars and place anchor bolts and sleeves to facilitate securing equipment.

END OF SECTION