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3-Wall LLS Design

Design Changed To: 2 Long Walls (LL) and 1 Short Wall (S).

This option changes the 3-wall standard design from two short walls and one long wall (SSL) to two long walls and one short wall (LLS).


Window 4' x 4'-High, Half Light

MaxLite Half Light Window (basic), nominal size is 4’x4’ fixed 1/4" tempered glass window, with steel frame. Sound Rating STC 31. This option uses 1 nominal 4' wide wall panel.This can also be used for a 2' window on a 2' wide panel, just request this during the design phase.


Window 4' x 4'-High, Half Light - Sound Deadening Glass STC 35

MaxLite Half Light Window, nominal 4’x4’ fixed laminated glass window, with steel frame. Sound Rating STC 35. This option uses 1 nominal 4' wide wall panel. This can also be used for a 2' window on a 2' wide panel, just request this during the design phase.


Window 4' x 6'-High, Full Light

MaxLite Full Light Window (taller), nominal size is 4’x6' fixed 1/4" tempered glass window, with steel frame. Sound Rating STC 31. This option uses 1 nominal 4' wide wall panel. This can also be used for a 2' window on a 2' wide panel, just request this during the design phase.


Sliding Glass Window 4' x 4'-High

Pella (brand) Encompass™ Side Sliding Window with lock. Nominal size is 4'x 4'. Double pane insulated temp glass. Frame color: Beige or White.


Data/Communication Basic Prep

Data-Comm Basic Prep. Includes: Post Preparation, mount bracket, and plain cover plate. Wiring and receptacle are not included. Conduit is not provided and typically not needed. This item is placed in our connecting post between wall panels and can be used on the same connecting post as electrical items.


Modular Wiring Option

Make your electrical items as modular as your office with our completely pre-wired plug together modular wiring system. This package is a complete UL listed heavy duty industrial modular snap together system. This is NOT like our rivals partially wired outlets with pig tails that require an electrician and extra components to finish the wiring. An ELECTRICIAN IS ONLY REQUIRED (not provided) to bring power to the breaker panel and make all connections at the breaker panel. Wired Electrical Items: 2’x4' T-8 light fixture(s), switch, duplex outlets, and AC outlet. Not Wired: Breaker Panel


Air Conditioner Package 7500 BTU

Friedrich (brand) Wall Unit Air Conditioner with heat 7,500 BTU Cool/4,000 BTU Heat.

Includes: (i) AC unit, (ii) wall cutout with trim.


Air Conditioner Package 11700 BTU

Friedrich (brand) Wall Unit Air Conditioner with heat 11,700 BTU Cool/10,700 BTU Heat and Programmable Thermostat and LCD Remote Control.

Includes: (i) AC unit, (ii) wall cutout with trim.


Air Conditioner Wall Prep

Air Conditioner wall cutout and trim. Use on a 4' wide wall panel without a window.

NOTE: Use for customer provided air conditioner. This is already included in our AC Packages.


Color Selection

Our standard and fastest shipping color is Tan. Select the color for the walls, doors, window frames and trim. Color is used on both sides of the wall.


Optional Two Different Wall Colors

This option changes the colors for the walls and trim. You decide the (1) Outside Wall Color (2) Inside Wall Color and (3) Which of these two colors will be your trim color.

Trim Color is for the following components: Doors and Jamb, Window Frames, Base and Top Wall Channels, and Inside and Outside Corners.

We will contact you to confirm the color combination you want. Please allow 2-3 weeks additional for fabrication.



Delivery by our Truck (please enter zip code)

National's Delivery Service. Shipments by our truck are ideal for destinations up to 1000 miles away. This is a no hassle delivery service with many advantages: Fixed shipping charge, Low rates per mile, FOB point is destination, Guaranteed to arrive damage-free, No freight claims - ever, Reliable delivery times, and Reduced installation cost with NO travel fees added. For longer distances contact us for LTL rates.

Please call us so we can estimate your shipping costs. 800-996-7266


Site Assembly

The site assembly price is for labor only. Travel expenses will be quoted separately as required. The assembly price assumes standard conditions per a site survey, which can be downloaded from our resource section.

NOTE: If National's Delivery Service is used, NO additional travel expenses are charged.


Tennessee Sales Tax (for in-state orders)

We do not charge or include sales tax for any out-of-state destinations. Any order with a Tennessee resale or tax exempt certificate is not taxed.


Modular In-Plant Office 8x12x9-high

3 Wall Configuration Includes Ceiling, Roof, Standard Electrical Kit and Steel Door. Windows are optional. Layout is Customized to Your Requirement.

  • 5078.00 Base Unit
Total 0
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All Major Credit Cards Accepted.
Paypal 6 month financing is available with approved credit.
Due to the size and custom nature of the product, returns can not be allowed.

What's Included

Engineered To Be Better

  • Sound Deadening Walls STC 35 (better noise reduction than other brands - STC 35 glass upgrade available).
  • Fire rated to Class A+ 40 minute thermal barrier (nearly 3x better thermal resistance than other brands).
  • EXCLUSIVE: DiamondCoat Durable 8 Mil Beige vinyl wall finish (33-100% thicker than other brands).
  • Easily cleanable smooth wall finishes so particulate does not get trapped in a coarse surface (like it does with our rivals products)
  • 9 foot high walls for a higher preferred ceiling height (our rivals provide lower ceilings as their standard).
  • Steel Door and Jamb (Larger) 40"x84", The industry's best door features: Heavy duty 20 ga. door, 16 ga. jamb, Galvanized steel, Powder coated finish, larger for better access 40x84, Gasketed jamb for sound conditioning, ADA Lever lockset, and 3 heavy duty hinges.
  • Stronger 3" thick wall panels, not flimsy thin walls and not bulky thick walls. 3" thick walls offer the optimum thickness for strength and performance, without adding unnecessary core thickness costs.
  • Non-progressive interchangeable component design. Easily change your configuration to move door, window or solid wall panels, and electrical without disturbing adjacent wall panels. All components are consistently sized to provide maximum flexibility; that's something most of our rivals can't say.
  • Build for Change. You don’t just purchase an office from us, you purchase a system. A system you can add to for a larger office, reconfigure, convert to multi levels, take down and move; the possibilities are endless.
  • NEW EXCLUSIVE: TougRock-FireGuard Moisture-Resistant Type X Gypsum
  • Modular Walls

    Completely modular and interchangeable solid wall panels with all connecting hardware. Nominal 4' wide (or 2' as needed) x 3 inches thick, 9' high (for better ceiling heights), All metal components are painted to match the walls.

    NOTE: Wall panels utilize a base track that anchors to your existing concrete floor.

    EXCLUSIVES: Diamond Coat 8 Mil vinyl wall finish, and ToughRock-FireGuard Moisture-Resistant type X Gypsum on both sides.

    Comparison Tip: Watch out for hardboard and polystyrene core panels. These do not meet the thermal barrier required by the IBC building code and may be unlawful to use in your state. We do not provide this construction for that reason. A minimum 1/2" gypsum is required with polystyrene walls; we use 5/8" gypsum for superior performance in all categories.

  • Steel Door

    MaxDoor, Heavy Duty Steel Door 40"x84" w/ 1/4" tempered glass, galvanealed: 20ga Door w/16ga Jamb, TextureCoat™ Powder Coat Finish, TiteSeal™ Gasketed Jamb, ADA compliant commercial quality hinges and lever lockset. Hinge and swing as requested in design phase. Solid door w/o glass available on request.

    Comparison Tip: Watch out for cheap hollow core wood-type doors. These light-duty doors will not last and won't stop noise effectively.

  • Basic Electrical Package

    Complete basic electrical package including 2'x4' light fixtures, outlets, switch, ac outlet, and breaker panel.

    Comparison Tip: Watch out for incomplete electrical packages. Some rivals cut corners by not providing breaker panels or ac outlets.

    Also includes post preparations, wall conduit, junction boxes, and cover plates.

    Not included: Ceiling conduit, bulbs or wiring.

  • Custom Configuration & Approval Drawings

    The building includes your customized configuration, you decide where you want to place your selected options: ie doors, windows, outlets and AC. Approval Drawings are provided for you to review before we process your order.

    We will call you after you place an order to confirm your requirements.

  • Steel Roof Deck

    A corrugated steel roof is provided with closure gaskets to seal out noise and dust. This B-Deck is minimum 22 ga. to meet no-load roof requirements and is typically galvanized or primer painted gray. Optional mezzanine storage roof loads are available.

    NOTE: 2-wall and 3-Wall structures assume that your existing walls can be attached to, and can handle the applied loads from our roof. If this is not the case, please contact us for perimeter support steel options.

  • Higher Acoustical Ceiling

    All components necessary for a complete suspended acoustical drop ceiling with 2x4 mineral tiles and grid is provided. Optional 2x2 grid is available.

    Comparison Tip: Watch out for lower 8' wall panels and subsequently lower ceilings. This can create an uncomfortable tunnel effect in your office. With our 9' walls you achieve a preferred higher ceiling. This added height provides a more comfortable work environment.

Technical Details

Item Modular In-Plant Office
Condition New
Type Unassembled 3-wall Interior use office
Wall Thickness and Width 3 inches thick, nominal 4 ft wide (or 2 ft as required)
Depth 8 ft. 4-1/2" (quantity 2)
Width 12 ft. 4-1/2" (quantity 1)
Height 9 ft. 1-3/4" (for preferred ceiling height)
Lights 2
Outlets 3
AC Outlet 1
Breaker Panel 1
Panel Material Vinyl Covered 5/8" type "X" gypsum on two sides, laminated to a thermal insulated EPS core
Color Tan (8 mil thick) (optional Gray or White)
Frame Color Tan (optional Gray or White)
Insulation R-8
Sound Transmission Coefficient STC35
Fire Rating Class A+ Non-Combustible 40 minute thermal barrier
Fire Test Standards ASTM E84
Door w/glass Heavy duty steel 40" x 84" , with ADA lever lockset
Windows Optional
Roof and Ceiling 22 Gauge corrugated galvanized or prime coated steel roof deck and 2 x4 Acoustical drop ceiling with white grid
Hardware All connecting hardware to make a complete office

You Provide

  • An Electrician (for wiring, ceiling conduit, power and breaker panel hookup)
  • Assembly, if not purchased.
  • Delivery, if not purchased. Shipments can be sent by LTL common carrier; which is usually required for longer distances.
  • All optional items not purchased.
  • Confirmation that the existing walls can handle the applied roof loads from our structure. Perimeter support steel can be added if required.

Not Included

  • Customizing or resizing of any components
  • Taxes (we only charge sales tax in TN)
  • Permits or fees
  • Engineering services, sealed drawings, or calculations.
  • Seismic zone consideration
  • Structural steel finish, other than prime first coat
  • Floor or floor finishes. Our walls anchor to your existing concrete slab.
  • Windows, HVAC, Assembly, and Delivery are all optional and not included items.
  • Items not included can be added as required.

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Wow, that was quick! Thank you! I’ll be sure to send all of the projects with similar offices to you to price.

— Wayne G, Senior Estimator

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