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SlenderWall Curtain Wall System

SlenderWall Lightweight Wall Panel System

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The precast concrete cladding system by SlenderWall carries features that benefit the architects that design the pre-engineered building and those who later inhabit it. Reduced costs and requirements for elements within the production, delivery and installation processes saves money for all parties involved. For projects that require 10,000 square feet or more of exterior cladding, SlenderWall is a proven recommendation. Download the latest SlenderWall literature.

SlenderWall’s precast concrete cladding panels are the industry’s only wall system that incorporates the proven technologies of architectural precast concrete, high-tech PVA fiber and welded-wire reinforcement, stainless steel anchors and integral interior heavy gauge galvanized steel or stainless steel studs. This precast concrete cladding design isolates the exterior cladding from the structural stresses associated with wind loading, steel frame movement, expansion and contraction and seismic shock.

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Benefits Of Precast Concrete Cladding:

These architectural precast concrete panels reduce installation time and costs by up to 50% due to the proprietary Lift-And-Release panel landing system. Aside from a quicker and more cost-efficient installation process, SlenderWall concrete panels are also designed for permanent use. The exterior cladding panels are maintenance-free and waterproof, which minimizes vapor inflammation. Also, the panels eliminate corrosion by utilizing corrosion-proof and rust-proof materials.

Each panel is manufactured in-house, so this makes for reduced on-site weather costs, delays and on-site construction debris. Moreover, these lightweight precast concrete cladding panels reduce shipping costs by 60% as more panels can be delivered simultaneously. Fewer on-site trades and structural requirements are also large factors in cost reductions with the use of SlenderWall. The flexibility of the architectural panels offer engineers and the money it saves contractors during the installation process is a win-win for both sides.To learn more visit the SlenderWall Technology page or www.SlenderWall.com

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Frequently Asked Questions

GENERAL

What is SLENDERWALL®?

It is a patented, lightweight, efficient, permanent, cladding, exterior wall system with extraordinary design flexibility that combines four proven design components: (1) architectural precast concrete; (2) hot-dipped galvanized welded wire fabric reinforcing steel; (3) epoxy-coated stainless-steel Nelson® anchors; and (4) heavy-gauge galvanized or stainless-steel studs. It allows interior finishes, such as drywall/gypsum, to be directly applied to the stud frame.

Has SLENDERWALL® been tested?

Yes, SLENDERWALL® has passed rigorous testing by third party and independent labs. Copies of the testing data are available upon request. (also see SECTION 4 of the Architectural Portfolio/Technical Design Guide).

What is the life of SLENDERWALL®?

SLENDERWALL® is made from components that have a 50- to 100-year history and a proven track record in the construction industry.

What is the warranty?

The typical manufacturer of the SLENDERWALL® product warrants that the SLENDERWALL® panels are made free of defects from materials and workmanship for a period of one year.

Where have SLENDERWALL® projects been built?

There are in excess of 100 completed projects in North America (see SECTION 2 of the Architectural Portfolio/Technical Design Guide), with many new ones underway.

Do I need any permits?

Permits may be required as with all building and construction projects. Consult your local building and zoning office for the requirements for your project.

Who produces SLENDERWALL®?

A: SLENDERWALL® is manufactured solely by certified, architectural, precast concrete producers who have received plant certification from either NPCA or PCI—the two premier associations in the precast industry—and who also are certified SLENDERWALL® licensees of EASI-SET® Industries.

What is the time frame for production, delivery and installation?

Production of an average project (40,000 square feet of exterior cladding) is approximately 12 weeks after start of shop drawings; delivery of SLENDERWALL® to the project site begins once 80% of the project is produced; installation is usually completed approximately 6 to 8 weeks from installation start.

Who installs the SLENDERWALL® panels?

SLENDERWALL® is installed by PCI-qualified (Precast/Prestressed Concrete Institute) erectors, or those who have a minimum of 5 years’ experience installing SLENDERWALL® architectural precast concrete panels.

How do you deliver the panels?

Panels are delivered to the project on trailers in the order of installation requested.

Do you provide drawings?

Yes. EASI-SET® Industries has certified engineering and design teams that are specially qualified to produce drawings for the SLENDERWALL® system.

Are the drawings reviewed and stamped by an engineer?

Yes, all SLENDERWALL® drawings are stamped by registered professional engineers.

FEATURES

What are the advantages of SLENDERWALL® over other types of wall systems?

There are five potential major proprietary benefits that come only with the SLENDERWALL® system: (1) Thermal break protection (THERMAGUARD™); (2) precast concrete isolated from the superstructure (DURAFLEX 360 o™  technology);  (3) OPTIONAL secondary, in-the-caulk-joint, water-penetration protection/detection system (H₂Out™); (4) OPTIONAL fast panel installation (Lift-and-Release™); and (5) a “Class A” architectural precast concrete brick finish (Second Nature™ ).

Can SLENDERWALL® span from floor to floor?

Yes, it is typically designed to span from floor-to-floor for floor heights up to 12-feet. In some instances, panels can be used to span multiple floors..

Do you provide openings for the HVAC units?

Yes. Consult EASI-SET® Industries for maximum size openings and locations for your particular project needs.

Can windows be installed in the plant?

Yes, depending upon the panelization design. However, since a long lead-time is typically required for the delivery of the windows; selection of the windows must be made by the architect sufficiently in advance of SLENDERWALL® production and delivery. (Installed windows are properly protected to prevent damage during shipping.)

Can SLENDERWALL® be used over existing structures?

Yes, SLENDERWALL® can be used to re-clad or over-clad existing structures. For maximum economy of installation, EASI-SET® recommends that the exterior of the existing structure be removed. SLENDERWALL® can be designed for installation over an existing structure from the outside, so the building can remain occupied during the installation process.  (See SECTION 2 of the Architectural Portfolio/Technical Design Guide, pages 8 & 9, NJ Institute of Technology, for an example of the re-clad technique and pages TBD & TBD, Johns Hopkins, for an example of the over-clad technique,)

Can SLENDERWALL® be used as a screen wall on top of a building?

Yes; the SLENDERWALL® panel is made of components that are susceptible to the elements, so the back of the panel must be protected from the elements either by sealing with a stain, a waterproof coating, or by applying a weather-tight sheathing on the back of the frame. There is also the option of using stainless steel framing and stainless steel connection hardware that is weather resistant.

Can the panels be used on a parking garage?

Yes; however, SLENDERWALL® panels have not been designed for vehicle impact at this time. Therefore, cables or curbs would have to be in place in front of (before) the panels.

What finishes can I use?

All architectural precast industry finishes are available, including Second Nature™ Architectural Precast Concrete Brick (APCB)

Can SLENDERWALL® be made in different colors?

Yes, SLENDERWALL® can be colored either by staining or using pigmented concrete.

What is Second Nature ™ Architectural Precast Concrete Brick (APCB)?

It is a SLENDERWALL® proprietary finish that is the only Class “A” precast concrete brick on the market with the quality level necessary for Class “A” commercial building projects.

TECHNICAL

What codes does SLENDERWALL® meet?

SLENDERWALL® meets IBC, ACI, AISC, PCI Design Handbook, CRSI Manual of Standard Practice, ASTM/ANSI/AWS, and most local or state building codes.

Can SLENDERWALL® be designed in self-bearing and/or load-bearing wall applications?

Typically, SLENDERWALL® panels are curtain walls and not intended to carry structural loads. They can be designed to be self-bearing (stacked panels) in multi-story applications. Additionally, special designs can be used to modify the panels to be structurally-loaded (load bearing) for specific applications.

What is the typical dead load of the SLENDERWALL® panel?

30 psf - non-insulated, 32 psf – insulated

What is the design wind loading for SLENDERWALL® panels?  

SLENDERWALL® panels can be designed to accommodate any level of wind as per IBC requirements.  For site-specific wind loading designs, contact Easi-Set Worldwide..

What is the R-value?

The R-value of the SLENDERWALL® panel with a 2 ½” air gap, 5 ½” of closed-cell foam insulation and drywall (gypsum) is a tested R-24.

Can SLENDERWALL® be a fire-rated wall?

With the proper fireproof insulation and the appropriate fireboard backing attached to the frame, SLENDERWALL® can be made to reach the ratings required by codes for firewalls.

What is the fire rating? 

With six-inches of insulation and one layer of 5/8-inch gypsum fireboard, SLENDERWALL® is rated for 74 minutes. A copy of the fire-rating letter is available upon request.

Is there a vapor barrier?

Typically, closed-cell foam provides the vapor barrier. Additionally, other vapor barriers can be applied as per the contract specification.

Where are vapor barriers applied?

They can be applied to the heated side of the SLENDERWALL® panels on the northeast side of the building between the frame and the concrete. Alternatively, insulating the panel with a closed-cell foam with a permeance of less than one.

How do you handle water penetration?

SLENDERWALL® resists water penetration by use of a concrete mix which incorporates an integral concrete admixture which reduces the capillary properties of the concrete, providing a dense concrete mix that repels water.

What is the gauge of the frame and track?

The typical stud is 16-gauge steel and the track is 14-gauge

How thick is the galvanizing?  

Both the studs and the track are G90 galvanized

What is the purpose of the air gap between the frame and back of concrete?

To provide a further thermal break from the exterior to the interior of the building.

How large can window openings be?

Openings in the SLENDERWALL® panel can be designed to fit most standard and custom window sizes available from window manufactures. Standard SLENDERWALL® panels can typically accommodate windows up to 7-feet wide. Panels can be designed to accommodate larger windows.

How are windows attached to the panel system?

Openings in the SLENDERWALL® panel are provided and the windows are typically attached using shims and screws to the SLENDERWALL® framing in accordance with window manufacturer’s guidelines.

How deep can the reveals be in a panel?

The recommended depth of the reveals is 3/8-inch.

How large can a projection be on the panel?

The maximum recommended projection is 6-inches deep. (See Drawing Details A-1 and A-7 in SECTION 3.01 of this Technical Design Guide.)

Can SLENDERWALL® be made to cantilever past a floor or roof?

Yes. See the SLENDERWALL® Drawing Detail A-4 in SECTION 3.01 of this Technical Design Guide for different types of panels and roof connections

How is SLENDERWALL® attached to the building?

SLENDERWALL® is attached to the building perimeter by gravity and lateral connections at the floor slab or steel/concrete frame. (For more information, see SECTION 3.01 of this Technical Design Guide, Drawing Details S-1 through S-20.)

How does SLENDERWALL® interface to other wall systems?      

SLENDERWALL® is compatible with most other types of systems made from metal, brick, and glass with an expansion joint.

What loads can be applied to the SLENDERWALL® panel for canopies, awning, and signage?

Only minimal loads can be applied to the SLENDERWALL® frame itself. Larger loads must be transferred to the structure by penetrating the SLENDERWALL® panel and attaching to the building superstructure.  Consult your EASI-SET® design team for specific help on your project. Light weight signage can typically be designed to attach to the SLENDERWALL® concrete facade using toggle-style bolts.

Can handrails and screens be attached to the SLENDERWALL® panels?

Yes; however, prior to attaching the screens or handrails to SLENDERWALL® panels, the design must be approved by the structural engineer and the SLENDERWALL® design team early in the design process.

How is the gap between the floor and panel plugged?

There is a piece of light-gauge break metal provided and installed by the drywall contractor during the installation of the drywall.

How is the fire-stop between floors handled?

There are two recommended companies with certified procedures for 2-hour-rating fire-stop methods for SLENDERWALL®: the Hilti Company and STI, Inc. The procedures for both are available upon request.

How do you seal between the panels?

Weatherproofing the SLENDERWALL® system is handled by caulking contractors that use the most up-to-date sealants on the market.

How do you seal the roof panels?

The roof panels are tied to the roof by the roofing membrane provided by the roofing contractor. Design of the connection to the roof membrane is dependent upon the type and style of the panel that you choose for your project. (See Drawing Detail A-4 in SECTION 3.01 of this Technical Design Guide for different roofing details.)

What is the standard size of a SLENDERWALL® panel?

SLENDERWALL® panels are designed for each project. Each building façade is separately “panelized” to produce the most panel repetition and the largest practical size, based on the building features. As a result, there is no standard size panel; however, a typical size is 10-feet by 30-feet (300 sf)

What’s the largest SLENDERWALL® panel I can design?

The largest practical panel size for most highways is 12-feet by 32-feet. Maximum panel size is dependent upon the type of trailer being used.

What does a SLENDERWALL® panel weigh compared to a conventional precast panel?         

The weight is around 30 pounds per square foot; the average conventional precast panel weighs around 85 pounds per square foot, so a SLENDERWALL® panel is about one-third the weight of a conventional precast panel.

What’s the tallest building that you have done?

The tallest building is a 32-story condominium in New York City called “Marriott ExecuStay” located at 3rd Avenue and 37th Street. (See Pages 2 & 3 of SECTION 2 of the Architectural Portfolio/Technical Design Guide.)

How is the frame attached to the 2-inch architectural precast?

The frame is attached to the concrete using an epoxy-coated, headed stainless-steel Nelson® anchor that is welded to the frame and embedded in the concrete, allowing a ½-inch air gap. This is a proprietary system called THERMAGUARD™ and is one of the major benefits exclusive to the SLENDERWALL® system.

PRICE

How competitive is SLENDERWALL® in cost compared to other cladding systems?

Costs vary from region to region. SLENDERWALL® over the years has remained competitive with other types of cladding due to its lightweight’s ability to have interior finishes applied directly and the flexibility of design. One of the most important aspects of cost control is to design the façade with as many repeatable features as possible to keep both forming and labor costs low

What is the installed cost per square foot?

Installed costs are dependent upon project location, building design complexity, finish and size of panels. SlenderWall does provide significant cost savings to the project, compared to other systems, when used in the building design. Contact your nearest SlenderWall licensed producer for more information.

Can you provide quotations from hand-drawn sketches?

Budget numbers can be given on basic concepts and sketches; however, to provide hard quotes and estimates, full drawings with sections and elevations are necessary and required.

How long does it take to get a price?

Most preliminary estimates and reviews of the project take about a week, depending on production and schedules. EASI-SET® Industries will strive to work within your time frame to provide thorough estimates on a timely basis.

To learn more visit the SlenderWall Technology page or www.SlenderWall.com

Read "A Case for SlenderWall" - six case studies covering a wide-range of market applications.

Request an accredited Lunch & Learn for your organization. This email address is being protected from spambots. You need JavaScript enabled to view it. or call 1-540-439-3266.This email address is being protected from spambots. You need JavaScript enabled to view it.

Earn AIA and GBCI credits, by taking the Architectural Record SlenderWall CEU course.

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