SECTION 16113

UNDERFLOOR DUCTS

PART 1 GENERAL

SECTION INCLUDES

Underfloor ducts.

Trench ducts.

Flush ducts.

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section 16121 - Insulated Wire and Cable.

RELATED SECTIONS

Section 03300 - Cast-In-Place Concrete.

Section 03200 - Concrete Reinforcement.

Section 16112 - Surface Raceway: Wall duct.

Section 16141 - Wiring Devices.

Section 16741 - Telephone Service Entrance: Telephone cabinets.

SUBMITTALS

Submit under provisions of Section [01300] [_____].

Shop Drawings: Indicate layout, insert spacing and height, locations of fittings and accessories, and overall dimensions.

Product Data: Provide data showing component details, dimensions, and finishes.

Manufacturer's Instructions:	Indicate application conditions and limitations of use stipulated by Product testing agency specified under Regulatory Requirements. Include instructions for storage, handling, protection, examination, preparation, installation, and starting of Product.

PROJECT RECORD DOCUMENTS

Submit under provisions of Section [01700] [______].

Record actual locations of ducts, service fittings, junction boxes, and branch circuiting arrangements.

OPERATION AND MAINTENANCE DATA

Submit under provisions of Section [01700] [_____].

Maintenance Data: Instructions for locating inserts and installing afterset inserts.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing Products specified in this Section with minimum [three] [____] years [documented] experience.

REGULATORY REQUIREMENTS

Conform to requirements of ANSI/NFPA 70.

Furnish products listed and classified by [Underwriters Laboratories, Inc.] [testing firm acceptable to authority having jurisdiction] as suitable for purpose specified and shown.

PRE-INSTALLATION CONFERENCE

Convene [one] [_____] week prior to commencing work of this Section, under provisions of Section [01039] [_____].

FIELD MEASUREMENTS

Verify that field measurements are as [indicated [on shop drawings].] [instructed by manufacturer.]

EXTRA MATERIALS

Furnish under provisions of Section [01700] [_____].

Provide [ten] [___] afterset inserts.

Provide [10] [____] percent of each service fitting type.

Provide [two] [____] of each special tool required to locate preset inserts.

Provide [two] [____] of each special tool required to install afterset inserts.

PART 2 PRODUCTS

MANUFACTURERS

[________________________________] Model [_________].

[________________________________] Model [_________].

[________________________________] Model [_________].

Substitutions: Under provisions of Section [01600]

[_____].

UNDERFLOOR DUCT

Description: Steel duct with corrosion-resistant finish.

Type: [Underfloor] [Flush].

Configuration: [One] [Two] level system using ducts in parallel runs as shown on Drawings.

Service:	[120 volt power, standard size;] [telephone, extra width size;] [computer data, extra width size;] [_____________], [standard] [extra width size].

Standard Size: [1.5 x 3 inches (38 x 76 mm)] [__________________________] nominal.

Extra Width Size: 1.5 x 6 inches (38 x 152 mm) [__________________________] nominal.

Inserts:	[Fabricate distribution lengths with [_____] inch ([_____] mm) high preset inserts on [24] [____] inch ([610] [____] mm) centers.]

****** [OR] ******

Provide precut 1-1/4 inch (32 mm) diameter holes on 24 inch (610 mm) centers. Close with flat metal screw plugs.

Single Level Junction Boxes:	[Rectangular] [Round] cover and trim, adjustable height. Provide internal barriers, conduit and duct entrances, and extension rings as required.

Two Level Junction Boxes: [Rectangular] [Round] cover and trim, adjustable height; separate enclosures for each service to allow feeder ducts to cross under distribution ducts. Provide conduit and duct entrances and extension rings as required.

Junction Box Cover Plate: Provide [tile trim plate flush with finished floor.] [smooth cover plate flush with concrete floor.] [carpet trim holders of proper depth.]

Supports: Adjustable before concrete topping placement.

Service Fittings: As specified in Section 16141.

Duct Markers: Corrosion resistant marker screws, [with escutcheon].

Fittings and Accessories: Manufacturer's standard.

TRENCH DUCT

Description:	[Closed] [Open] bottom, steel trench duct

with corrosion resistant finish.

Size: [____] inch ([____] mm) deep by [____] inch ([____] mm) wide.

Compartments: Provide adjustable compartment dividers.

****** [OR] ******

Compartments: [___] inch ([___]) mm wide for 120 volt circuits; [___] inch ([___]) mm wide for telephone; [___] inch ([___]) mm wide for [sound] [computer data] [____________].

Supports: Adjustable [before] [and] [after] concrete topping placement.

Coverplates:	1/4 inch (6.4 mm) thick steel removable coverplates with gasketed joints; [smooth coverplate flush with concrete floor.][recessed coverplate with tile trim.]

Fittings and Accessories: Manufacturer's standard.

SERVICE FITTINGS

Pedestal Convenience Receptacle:

[__________________________] Model [_________].

[__________________________] Model [_________].

[__________________________] Model [_________].

Substitutions: Under provisions of Section [01600] [_____].

Housing: [Satin aluminum] [_______________].

Device Plate: [Stainless steel] [_____________].

Configuration:	[One duplex] [Two duplex, back-to-back].

Flush Cover Convenience Receptacle:

[__________________________] Model [_________].

[__________________________] Model [_________].

[__________________________] Model [_________].

Substitutions: Under provisions of Section [01600] [_____].

Material: [Aluminum] [Brass] [_______________].

Configuration:	Duplex [flap] [threaded] opening.

Pedestal Communication Outlet:

[__________________________] Model [_________].

[__________________________] Model [_________].

[__________________________] Model [_________].

Substitutions: Under provisions of Section [01600] [_____].

Housing: [Satin aluminum] [_______________].

Device Plate: [Stainless steel] [_____________].

Configuration: One bushed opening, 1 inch (25 mm) inside diameter.

Flush Cover Communication Outlet:

[__________________________] Model [_________].

[__________________________] Model [_________].

[__________________________] Model [_________].

Substitutions: Under provisions of Section [01600] [_____].

Material: [Aluminum] [Brass] [_______________].

Configuration: 2-1/8 x 1 inch (54 x 25 mm) combination threaded opening.

Pedestal Combination Fitting:

[__________________________] Model [_________].

[__________________________] Model [_________].

[__________________________] Model [_________].

Substitutions: Under provisions of Section [01600] [_____].

Housing: [Satin aluminum] [_______________].

Device Plate: [Stainless steel] [_____________].

Configuration: One duplex convenience receptacle with one bushed opening, 1 inch (25 mm) inside diameter.

Flush Cover Combination Fitting:

[__________________________] Model [_________].

[__________________________] Model [_________].

[__________________________] Model [_________].

Substitutions: Under provisions of Section [01600] [_____].

Material: [Aluminum] [Brass] [_______________].

Configuration: Duplex [flap] [threaded] opening with 2-1/8 x 1 inch (54 x 25 mm) combination threaded opening.

PART 3 EXECUTION

INSTALLATION

Install Products in accordance with manufacturer's instructions.

Locate duct in [structural slab.] [concrete topping.]

Provide expansion fittings with suitable bonding jumper where duct crosses building expansion joints.

Terminate ducts for power service [in bottom of [panelboard] [or] [wireway] using suitable fittings.] [in junction box for extension of conduit to panelboard.]

Terminate ducts for telephone service [2 inches (50 mm) above floor in telephone closet] [in bottom of telephone cabinet] using suitable fittings.

Terminate ducts for [____________] service [________________________________.]

Level cover plates flush with finished concrete floor.

Place rectangular plates square with wall lines.

Securely hold junction boxes and ducts in place during installation to avoid floating or other movement.

Close unused duct or conduit entrances to junction boxes. Seal duct terminations at junction boxes.

Ground and bond duct under provisions of Section 16170.

Install underfloor duct with tops of preset inserts [1/8] [___] inch ([3] [__] mm) below finished floor line. Locate ducts [on [_____] ft ([_____] m) centers.] [as indicated on Drawings.]

Install flush duct flush with finished floor.

Place schedule on the inside of coverplate of each junction box indicating distance to first insert in each direction, measured from the center of the box. Use self-adhesive labels for schedule.

Use blank duct in permanent corridors, vestibules, passages, lobbies, for connecting parallel ducts less than 6 feet (1.8 m) apart, for feeder duct from cabinet or panelboard to first junction box, and where indicated.

Support Couplers and Supports: Join duct lengths using combination support couplers where practical. Provide additional supports at intervals of not over 5 feet (1.5 m), within 30 inches (750 mm) each side of junction boxes, and as close as practical to elbows, bends, and terminations.

Install insert within 12 inches (30 mm) of edge of junction box. Align inserts on same centers for all services.

Do not extend inserts into special floor finishes, such as terrazzo, marble, or wood.

Install a duct marker in each insert adjacent to junction box, at end of each duct run, on both sides of permanent partitions, and on both sides of change of direction of duct. Install markers flush with finished floor material. In carpeted areas, install marker screws level with carpet backing.

Install surface service fittings after installation of floor finishes. Cut floors as necessary, following duct manufacturer's recommendations. Replace damaged floor construction and finish.

Install trench duct trim flush with coverplates; maintain covering of factory-applied tape for protection.

Terminate ducts for X-ray circuits at wall; interface with wall duct provided under Section 16112.

Clean ducts and fittings of debris and dust before

installing wire and cable.

Pull wire and cable from outlet insert toward junction boxes.

Install branch circuit conductors continuous between junction box and farthest fitting. Do not cut conductor to make connections to receptacle devices.

TOLERANCES

Variation From Location Shown on Drawings: [_____] inch ([___] mm), maximum.

CLEANING

Clean finished surfaces in accordance with manufacturer's instructions.

PROTECTION

Protect finished installation under provisions of Section [01500.] [01535.]

Protect boxes, covers, and rings from distortion and finish damage.

Replace boxes, covers, and rings marred during construction.

END OF SECTION